Release v1.13.1

Bugfix: Append when array empty results in null value

.gitignore

@@ -6,6 +6,7 @@
 # Folders
 _obj
 _test
+bin
 build
 .DS_Store
 
@@ -26,3 +27,5 @@ coverage.out
 *.prof
 yaml
 vendor/*/
+tmp/
+cover/

.travis.yml

@@ -1,4 +1,6 @@
 language: go
 go:
     - 1.7.x
-script: ./ci.sh
+script:
+  - scripts/devtools.sh
+  - make local build

Dockerfile.dev

@@ -0,0 +1,28 @@
+FROM golang:1.7
+
+COPY scripts/devtools.sh /opt/devtools.sh
+
+RUN set -e -x \
+    && /opt/devtools.sh
+
+# install mkdocs
+RUN set -ex \
+    && buildDeps=' \
+        build-essential \
+        python-dev \
+    ' \
+    && apt-get update && apt-get install -y --no-install-recommends \
+        $buildDeps \
+        python2.7 \
+        python-pip \
+    && pip install --upgrade \
+        pip \
+        'Markdown>=2.6.9' \
+        'mkdocs>=0.16.3' \
+        'mkdocs-material>=1.10.1' \
+        'markdown-include>=0.5.1' \
+    && apt-get purge -y --auto-remove $buildDeps \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV CGO_ENABLED 0
+ENV GOPATH /go:/yaml

Makefile

@@ -0,0 +1,119 @@
+MAKEFLAGS += --warn-undefined-variables
+SHELL := /bin/bash
+.SHELLFLAGS := -o pipefail -euc
+.DEFAULT_GOAL := install
+
+include Makefile.variables
+
+.PHONY: help
+help:
+	@echo 'Management commands for cicdtest:'
+	@echo
+	@echo 'Usage:'
+	@echo '  ## Develop / Test Commands'
+	@echo '    make build           Build yaml binary.'
+	@echo '    make install         Install yaml.'
+	@echo '    make xcompile        Build cross-compiled binaries of yaml.'
+	@echo '    make vendor          Install dependencies using govendor.'
+	@echo '    make format          Run code formatter.'
+	@echo '    make check           Run static code analysis (lint).'
+	@echo '    make test            Run tests on project.'
+	@echo '    make cover           Run tests and capture code coverage metrics on project.'
+	@echo '    make clean           Clean the directory tree of produced artifacts.'
+	@echo
+	@echo '  ## Utility Commands'
+	@echo '    make setup           Configures Minishfit/Docker directory mounts.'
+	@echo
+
+
+.PHONY: clean
+clean:
+	@rm -rf bin build cover *.out
+
+veryclean: clean
+	rm -rf tmp
+	find vendor/* -maxdepth 0 -ignore_readdir_race -type d -exec rm -rf {} \;
+
+## prefix before other make targets to run in your local dev environment
+local: | quiet
+	@$(eval DOCKRUN= )
+	@mkdir -p tmp
+	@touch tmp/dev_image_id
+quiet: # this is silly but shuts up 'Nothing to be done for `local`'
+	@:
+
+prepare: tmp/dev_image_id
+tmp/dev_image_id: Dockerfile.dev scripts/devtools.sh
+	@mkdir -p tmp
+	@docker rmi -f ${DEV_IMAGE} > /dev/null 2>&1 || true
+	@docker build -t ${DEV_IMAGE} -f Dockerfile.dev .
+	@docker inspect -f "{{ .ID }}" ${DEV_IMAGE} > tmp/dev_image_id
+
+# ----------------------------------------------
+# build
+.PHONY: build
+build: build/dev
+
+.PHONY: build/dev
+build/dev: test *.go
+	@mkdir -p bin/
+	${DOCKRUN} go build -o bin/yaml --ldflags "$(LDFLAGS)"
+	${DOCKRUN} bash ./scripts/acceptance.sh
+
+## Compile the project for multiple OS and Architectures.
+xcompile: check
+	@rm -rf build/
+	@mkdir -p build
+	${DOCKRUN} bash ./scripts/xcompile.sh
+	@find build -type d -exec chmod 755 {} \; || :
+	@find build -type f -exec chmod 755 {} \; || :
+
+.PHONY: install
+install: build
+	${DOCKRUN} go install
+
+# Each of the fetch should be an entry within vendor.json; not currently included within project
+.PHONY: vendor
+vendor: tmp/dev_image_id
+	${DOCKRUN} bash ./scripts/vendor.sh
+	@chmod 664 vendor/vendor.json
+
+# ----------------------------------------------
+# develop and test
+
+.PHONY: format
+format: vendor
+	${DOCKRUN} bash ./scripts/format.sh
+
+.PHONY: check
+check: format
+	${DOCKRUN} bash ./scripts/check.sh
+
+.PHONY: test
+test: check
+	${DOCKRUN} bash ./scripts/test.sh
+
+.PHONY: cover
+cover: check
+	@rm -rf cover/
+	@mkdir -p cover
+	${DOCKRUN} bash ./scripts/coverage.sh
+	@find cover -type d -exec chmod 755 {} \; || :
+	@find cover -type f -exec chmod 644 {} \; || :
+
+.PHONY: build-docs
+build-docs: prepare mkdocs.yml mkdocs/*
+	${DOCKRUN} mkdocs build
+	@find docs -type d -exec chmod 755 {} \; || :
+	@find docs -type f -exec chmod 644 {} \; || :
+
+.PHONY: release
+release: xcompile
+	${DOCKRUN} bash ./scripts/publish.sh
+
+# ----------------------------------------------
+# utilities
+
+.PHONY: setup
+setup:
+	@bash ./scripts/setup.sh

Makefile.variables

@@ -0,0 +1,38 @@
+export PROJECT = yaml
+IMPORT_PATH := github.com/mikefarah/${PROJECT}
+
+export GIT_COMMIT = $(shell git rev-parse --short HEAD)
+export GIT_DIRTY = $(shell test -n "$$(git status --porcelain)" && echo "+CHANGES" || true)
+export GIT_DESCRIBE = $(shell git describe --tags --always)
+LDFLAGS :=
+LDFLAGS += -X main.GitCommit=${GIT_COMMIT}${GIT_DIRTY}
+LDFLAGS += -X main.GitDescribe=${GIT_DESCRIBE}
+
+GITHUB_TOKEN ?=
+
+# Windows environment?
+CYG_CHECK := $(shell hash cygpath 2>/dev/null && echo 1)
+ifeq ($(CYG_CHECK),1)
+	VBOX_CHECK := $(shell hash VBoxManage 2>/dev/null && echo 1)
+
+	# Docker Toolbox (pre-Windows 10)
+	ifeq ($(VBOX_CHECK),1)
+		ROOT := /${PROJECT}
+	else
+		# Docker Windows
+		ROOT := $(shell cygpath -m -a "$(shell pwd)")
+	endif
+else
+	# all non-windows environments
+	ROOT := $(shell pwd)
+endif
+
+DEV_IMAGE := ${PROJECT}_dev
+
+DOCKRUN := docker run --rm \
+	-e LDFLAGS="${LDFLAGS}" \
+	-e GITHUB_TOKEN="${GITHUB_TOKEN}" \
+	-v ${ROOT}/vendor:/go/src \
+	-v ${ROOT}:/${PROJECT}/src/${IMPORT_PATH} \
+	-w /${PROJECT}/src/${IMPORT_PATH} \
+	${DEV_IMAGE}

README.md

@@ -20,6 +20,8 @@ go get github.com/mikefarah/yaml
 - Convert from json to yaml
 - Convert from yaml to json
 - Pipe data in by using '-'
+- Merge multiple yaml files where each additional file sets values for missing or null value keys.
+- Merge multiple yaml files with overwrite to support overriding previous values.
 
 ## [Usage](http://mikefarah.github.io/yaml/)
 
@@ -27,25 +29,29 @@ Check out the [documentation](http://mikefarah.github.io/yaml/) for more detaile
 
 ```
 Usage:
+  yaml [flags]
   yaml [command]
 
 Available Commands:
+  help        Help about any command
+  merge       yaml m [--inplace/-i] [--overwrite/-x] sample.yaml sample2.yaml
+  new         yaml n [--script/-s script_file] a.b.c newValueForC
   read        yaml r sample.yaml a.b.c
   write       yaml w [--inplace/-i] [--script/-s script_file] sample.yaml a.b.c newValueForC
-  new         yaml n [--script/-s script_file] a.b.c newValueForC
 
 Flags:
-  -h, --help[=false]: help for yaml
-  -j, --tojson[=false]: output as json
-  -t, --trim[=true]: trim yaml output
-  -v, --verbose[=false]: verbose mode
+  -h, --help      help for yaml
+  -j, --tojson    output as json
+  -t, --trim      trim yaml output (default true)
+  -v, --verbose   verbose mode
+  -V, --version   Print version information and quit
 
 Use "yaml [command] --help" for more information about a command.
 ```
 
 ## Contribute
-1. run `govendor sync` [link](https://github.com/kardianos/govendor)
+1. `make vendor` OR run `govendor sync` [link](https://github.com/kardianos/govendor)
 2. add unit tests
-3. make changes
-4. run ./precheckin.sh
+3. apply changes
+4. `make`
 5. profit

commands_test.go

@@ -0,0 +1,544 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/spf13/cobra"
+)
+
+func getRootCommand() *cobra.Command {
+	return newCommandCLI()
+}
+
+func TestRootCmd(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !strings.Contains(result.Output, "Usage:") {
+		t.Error("Expected usage message to be printed out, but the usage message was not found.")
+	}
+
+}
+
+func TestRootCmd_VerboseLong(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "--verbose")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !verbose {
+		t.Error("Expected verbose to be true")
+	}
+}
+
+func TestRootCmd_VerboseShort(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-v")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !verbose {
+		t.Error("Expected verbose to be true")
+	}
+}
+
+func TestRootCmd_TrimLong(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "--trim")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !trimOutput {
+		t.Error("Expected trimOutput to be true")
+	}
+}
+
+func TestRootCmd_TrimShort(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-t")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !trimOutput {
+		t.Error("Expected trimOutput to be true")
+	}
+}
+
+func TestRootCmd_ToJsonLong(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "--tojson")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !outputToJSON {
+		t.Error("Expected outputToJSON to be true")
+	}
+}
+
+func TestRootCmd_ToJsonShort(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-j")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+
+	if !outputToJSON {
+		t.Error("Expected outputToJSON to be true")
+	}
+}
+
+func TestRootCmd_VersionShort(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-V")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	if !strings.Contains(result.Output, "yaml version") {
+		t.Error("expected version message to be printed out, but the message was not found.")
+	}
+}
+
+func TestRootCmd_VersionLong(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "--version")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	if !strings.Contains(result.Output, "yaml version") {
+		t.Error("expected version message to be printed out, but the message was not found.")
+	}
+}
+
+func TestReadCmd(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/sample.yaml b.c")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	assertResult(t, "2\n", result.Output)
+}
+
+func TestReadCmd_ArrayYaml(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml [0].gather_facts")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	assertResult(t, "false\n", result.Output)
+}
+
+func TestReadCmd_ArrayYaml_NoPath(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `- become: true
+  gather_facts: false
+  hosts: lalaland
+  name: Apply smth
+  roles:
+  - lala
+  - land
+  serial: 1
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestReadCmd_ArrayYaml_OneElement(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml [0]")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `become: true
+gather_facts: false
+hosts: lalaland
+name: Apply smth
+roles:
+- lala
+- land
+serial: 1
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestReadCmd_ArrayYaml_Splat(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml [*]")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `- become: true
+  gather_facts: false
+  hosts: lalaland
+  name: Apply smth
+  roles:
+  - lala
+  - land
+  serial: 1
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestReadCmd_ArrayYaml_SplatKey(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml [*].gather_facts")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := "- false\n"
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestReadCmd_ArrayYaml_ErrorBadPath(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml [x].gather_facts")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to invalid path")
+	}
+	expectedOutput := `Error accessing array: strconv.ParseInt: parsing "x": invalid syntax`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestReadCmd_ArrayYaml_Splat_ErrorBadPath(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read examples/array.yaml [*].roles[x]")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to invalid path")
+	}
+	expectedOutput := `Error accessing array: strconv.ParseInt: parsing "x": invalid syntax`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestReadCmd_Error(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to missing arg")
+	}
+	expectedOutput := `Must provide filename`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestReadCmd_ErrorEmptyFilename(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read  ")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to missing arg")
+	}
+	expectedOutput := `Must provide filename`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestReadCmd_ErrorUnreadableFile(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "read fake-unknown")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to unknown file")
+	}
+	expectedOutput := `open fake-unknown: no such file or directory`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestReadCmd_ErrorBadPath(t *testing.T) {
+	content := `b:
+  d:
+    e:
+      - 3
+      - 4
+    f:
+      - 1
+      - 2
+`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("read %s b.d.*.[x]", filename))
+	if result.Error == nil {
+		t.Fatal("Expected command to fail due to invalid path")
+	}
+	expectedOutput := `Error accessing array: strconv.ParseInt: parsing "x": invalid syntax`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestReadCmd_Verbose(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-v read examples/sample.yaml b.c")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	assertResult(t, "2\n", result.Output)
+}
+
+func TestReadCmd_NoTrim(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "--trim=false read examples/sample.yaml b.c")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	assertResult(t, "2\n\n", result.Output)
+}
+
+func TestReadCmd_ToJson(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-j read examples/sample.yaml b.c")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	assertResult(t, "2\n", result.Output)
+}
+
+func TestNewCmd(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "new b.c 3")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `b:
+  c: 3
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestNewCmd_Error(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "new b.c")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to missing arg")
+	}
+	expectedOutput := `Must provide <path_to_update> <value>`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestNewCmd_Verbose(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-v new b.c 3")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `b:
+  c: 3
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestNewCmd_ToJson(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-j new b.c 3")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `{"b":{"c":3}}
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestWriteCmd(t *testing.T) {
+	content := `b:
+  c: 3
+`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("write %s b.c 7", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `b:
+  c: 7
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestWriteCmd_EmptyArray(t *testing.T) {
+	content := `b: 3`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("write %s a []", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `b: 3
+a: []
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestWriteCmd_Error(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "write")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to missing arg")
+	}
+	expectedOutput := `Must provide <filename> <path_to_update> <value>`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestWriteCmd_ErrorUnreadableFile(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "write fake-unknown a.b 3")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to unknown file")
+	}
+	expectedOutput := `open fake-unknown: no such file or directory`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestWriteCmd_Verbose(t *testing.T) {
+	content := `b:
+  c: 3
+`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("-v write %s b.c 7", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `b:
+  c: 7
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestWriteCmd_Inplace(t *testing.T) {
+	content := `b:
+  c: 3
+`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("write -i %s b.c 7", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	gotOutput := readTempYamlFile(filename)
+	expectedOutput := `b:
+  c: 7`
+	assertResult(t, expectedOutput, gotOutput)
+}
+
+func TestWriteCmd_Append(t *testing.T) {
+	content := `b:
+  - foo
+`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("write %s b[+] 7", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `b:
+- foo
+- 7
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestWriteCmd_AppendEmptyArray(t *testing.T) {
+	content := `a: 2
+`
+	filename := writeTempYamlFile(content)
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("write %s b[+] v", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `a: 2
+b:
+- v
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestMergeCmd(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "merge examples/data1.yaml examples/data2.yaml")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `a: simple
+b:
+- 1
+- 2
+c:
+  test: 1
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestMergeCmd_Error(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "merge examples/data1.yaml")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to missing arg")
+	}
+	expectedOutput := `Must provide at least 2 yaml files`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestMergeCmd_ErrorUnreadableFile(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "merge examples/data1.yaml fake-unknown")
+	if result.Error == nil {
+		t.Error("Expected command to fail due to unknown file")
+	}
+	expectedOutput := `open fake-unknown: no such file or directory`
+	assertResult(t, expectedOutput, result.Error.Error())
+}
+
+func TestMergeCmd_Verbose(t *testing.T) {
+	cmd := getRootCommand()
+	result := runCmd(cmd, "-v merge examples/data1.yaml examples/data2.yaml")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `a: simple
+b:
+- 1
+- 2
+c:
+  test: 1
+`
+	assertResult(t, expectedOutput, result.Output)
+}
+
+func TestMergeCmd_Inplace(t *testing.T) {
+	filename := writeTempYamlFile(readTempYamlFile("examples/data1.yaml"))
+	defer removeTempYamlFile(filename)
+
+	cmd := getRootCommand()
+	result := runCmd(cmd, fmt.Sprintf("merge -i %s examples/data2.yaml", filename))
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	gotOutput := readTempYamlFile(filename)
+	expectedOutput := `a: simple
+b:
+- 1
+- 2
+c:
+  test: 1`
+	assertResult(t, expectedOutput, gotOutput)
+}

coverage.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-go test -coverprofile=coverage.out && go tool cover -html=coverage.out

data_navigator.go

@@ -1,8 +1,11 @@
 package main
 
 import (
-	"gopkg.in/yaml.v2"
+	"fmt"
+	"sort"
 	"strconv"
+
+	"gopkg.in/yaml.v2"
 )
 
 func entryInSlice(context yaml.MapSlice, key interface{}) *yaml.MapItem {
@@ -40,7 +43,7 @@ func writeMap(context interface{}, paths []string, value interface{}) yaml.MapSl
 
 	log.Debugf("\tchild.Value %v\n", child.Value)
 
-	remainingPaths := paths[1:len(paths)]
+	remainingPaths := paths[1:]
 	child.Value = updatedChildValue(child.Value, remainingPaths, value)
 	log.Debugf("\tReturning mapSlice %v\n", mapSlice)
 	return mapSlice
@@ -52,7 +55,7 @@ func updatedChildValue(child interface{}, remainingPaths []string, value interfa
 	}
 
 	_, nextIndexErr := strconv.ParseInt(remainingPaths[0], 10, 64)
-	if nextIndexErr != nil {
+	if nextIndexErr != nil && remainingPaths[0] != "+" {
 		// must be a map
 		return writeMap(child, remainingPaths, value)
 	}
@@ -68,7 +71,7 @@ func writeArray(context interface{}, paths []string, value interface{}) []interf
 	case []interface{}:
 		array = context.([]interface{})
 	default:
-		array = make([]interface{}, 1)
+		array = make([]interface{}, 0)
 	}
 
 	if len(paths) == 0 {
@@ -78,10 +81,18 @@ func writeArray(context interface{}, paths []string, value interface{}) []interf
 	log.Debugf("\tarray %v\n", array)
 
 	rawIndex := paths[0]
-	index, err := strconv.ParseInt(rawIndex, 10, 64)
-	if err != nil {
-		die("Error accessing array: %v", err)
+	var index int64
+	// the append array indicator
+	if rawIndex == "+" {
+		index = int64(len(array))
+	} else {
+		index, _ = strconv.ParseInt(rawIndex, 10, 64)
 	}
+	// writeArray is only called by updatedChildValue which handles parsing the
+	// index, as such this renders this dead code.
+	// if err != nil {
+	// 	return array, fmt.Errorf("Error accessing array: %v", err)
+	// }
 	for index >= int64(len(array)) {
 		array = append(array, nil)
 	}
@@ -89,13 +100,13 @@ func writeArray(context interface{}, paths []string, value interface{}) []interf
 
 	log.Debugf("\tcurrentChild %v\n", currentChild)
 
-	remainingPaths := paths[1:len(paths)]
+	remainingPaths := paths[1:]
 	array[index] = updatedChildValue(currentChild, remainingPaths, value)
 	log.Debugf("\tReturning array %v\n", array)
 	return array
 }
 
-func readMap(context yaml.MapSlice, head string, tail []string) interface{} {
+func readMap(context yaml.MapSlice, head string, tail []string) (interface{}, error) {
 	if head == "*" {
 		return readMapSplat(context, tail)
 	}
@@ -108,21 +119,25 @@ func readMap(context yaml.MapSlice, head string, tail []string) interface{} {
 	return calculateValue(value, tail)
 }
 
-func readMapSplat(context yaml.MapSlice, tail []string) interface{} {
+func readMapSplat(context yaml.MapSlice, tail []string) (interface{}, error) {
 	var newArray = make([]interface{}, len(context))
 	var i = 0
 	for _, entry := range context {
 		if len(tail) > 0 {
-			newArray[i] = recurse(entry.Value, tail[0], tail[1:len(tail)])
+			val, err := recurse(entry.Value, tail[0], tail[1:])
+			if err != nil {
+				return nil, err
+			}
+			newArray[i] = val
 		} else {
 			newArray[i] = entry.Value
 		}
 		i++
 	}
-	return newArray
+	return newArray, nil
 }
 
-func recurse(value interface{}, head string, tail []string) interface{} {
+func recurse(value interface{}, head string, tail []string) (interface{}, error) {
 	switch value.(type) {
 	case []interface{}:
 		if head == "*" {
@@ -130,37 +145,75 @@ func recurse(value interface{}, head string, tail []string) interface{} {
 		}
 		index, err := strconv.ParseInt(head, 10, 64)
 		if err != nil {
-			die("Error accessing array: %v", err)
+			return nil, fmt.Errorf("Error accessing array: %v", err)
 		}
 		return readArray(value.([]interface{}), index, tail)
 	case yaml.MapSlice:
 		return readMap(value.(yaml.MapSlice), head, tail)
 	default:
-		return nil
+		return nil, nil
 	}
 }
 
-func readArray(array []interface{}, head int64, tail []string) interface{} {
+func readArray(array []interface{}, head int64, tail []string) (interface{}, error) {
 	if head >= int64(len(array)) {
-		return nil
+		return nil, nil
 	}
 
 	value := array[head]
-
 	return calculateValue(value, tail)
 }
 
-func readArraySplat(array []interface{}, tail []string) interface{} {
+func readArraySplat(array []interface{}, tail []string) (interface{}, error) {
 	var newArray = make([]interface{}, len(array))
 	for index, value := range array {
-		newArray[index] = calculateValue(value, tail)
+		val, err := calculateValue(value, tail)
+		if err != nil {
+			return nil, err
+		}
+		newArray[index] = val
 	}
-	return newArray
+	return newArray, nil
 }
 
-func calculateValue(value interface{}, tail []string) interface{} {
+func calculateValue(value interface{}, tail []string) (interface{}, error) {
 	if len(tail) > 0 {
-		return recurse(value, tail[0], tail[1:len(tail)])
+		return recurse(value, tail[0], tail[1:])
 	}
-	return value
+	return value, nil
+}
+
+func mapToMapSlice(data map[interface{}]interface{}) yaml.MapSlice {
+	var mapSlice yaml.MapSlice
+
+	for k, v := range data {
+		if mv, ok := v.(map[interface{}]interface{}); ok {
+			v = mapToMapSlice(mv)
+		}
+		item := yaml.MapItem{Key: k, Value: v}
+		mapSlice = append(mapSlice, item)
+	}
+
+	// because the parsing of the yaml was done via a map the order will be inconsistent
+	// apply order to allow a consistent output
+	// Only available in Go 1.8+
+	// sort.SliceStable(mapSlice, func(i, j int) bool { return mapSlice[i].Key < mapSlice[j].Key })
+	sort.Sort(sortMap{mapSlice})
+	return mapSlice
+}
+
+type sortMap struct {
+	ms yaml.MapSlice
+}
+
+func (m sortMap) Len() int {
+	return len(m.ms)
+}
+
+func (m sortMap) Less(i, j int) bool {
+	return m.ms[i].Key.(string) < m.ms[j].Key.(string)
+}
+
+func (m sortMap) Swap(i, j int) {
+	m.ms[i], m.ms[j] = m.ms[j], m.ms[i]
 }

data_navigator_test.go

@@ -2,18 +2,11 @@ package main
 
 import (
 	"fmt"
-	"github.com/op/go-logging"
-	"gopkg.in/yaml.v2"
-	"os"
 	"sort"
 	"testing"
-)
 
-func TestMain(m *testing.M) {
-	backend.SetLevel(logging.ERROR, "")
-	logging.SetBackend(backend)
-	os.Exit(m.Run())
-}
+	yaml "gopkg.in/yaml.v2"
+)
 
 func TestReadMap_simple(t *testing.T) {
 	var data = parseData(`
@@ -21,7 +14,8 @@ func TestReadMap_simple(t *testing.T) {
 b:
   c: 2
 `)
-	assertResult(t, 2, readMap(data, "b", []string{"c"}))
+	got, _ := readMap(data, "b", []string{"c"})
+	assertResult(t, 2, got)
 }
 
 func TestReadMap_splat(t *testing.T) {
@@ -31,7 +25,8 @@ mapSplat:
   item1: things
   item2: whatever
 `)
-	var result = readMap(data, "mapSplat", []string{"*"}).([]interface{})
+	res, _ := readMap(data, "mapSplat", []string{"*"})
+	result := res.([]interface{})
 	var actual = []string{result[0].(string), result[1].(string)}
 	sort.Strings(actual)
 	assertResult(t, "[things whatever]", fmt.Sprintf("%v", actual))
@@ -47,7 +42,8 @@ mapSplatDeep:
     cats: apples
 `)
 
-	var result = readMap(data, "mapSplatDeep", []string{"*", "cats"}).([]interface{})
+	res, _ := readMap(data, "mapSplatDeep", []string{"*", "cats"})
+	result := res.([]interface{})
 	var actual = []string{result[0].(string), result[1].(string)}
 	sort.Strings(actual)
 	assertResult(t, "[apples bananas]", fmt.Sprintf("%v", actual))
@@ -59,7 +55,8 @@ func TestReadMap_key_doesnt_exist(t *testing.T) {
 b:
   c: 2
 `)
-	assertResult(t, nil, readMap(data, "b.x.f", []string{"c"}))
+	got, _ := readMap(data, "b.x.f", []string{"c"})
+	assertResult(t, nil, got)
 }
 
 func TestReadMap_recurse_against_string(t *testing.T) {
@@ -67,7 +64,8 @@ func TestReadMap_recurse_against_string(t *testing.T) {
 ---
 a: cat
 `)
-	assertResult(t, nil, readMap(data, "a", []string{"b"}))
+	got, _ := readMap(data, "a", []string{"b"})
+	assertResult(t, nil, got)
 }
 
 func TestReadMap_with_array(t *testing.T) {
@@ -78,7 +76,64 @@ b:
     - 3
     - 4
 `)
-	assertResult(t, 4, readMap(data, "b", []string{"d", "1"}))
+	got, _ := readMap(data, "b", []string{"d", "1"})
+	assertResult(t, 4, got)
+}
+
+func TestReadMap_with_array_and_bad_index(t *testing.T) {
+	var data = parseData(`
+---
+b:
+  d:
+    - 3
+    - 4
+`)
+	_, err := readMap(data, "b", []string{"d", "x"})
+	if err == nil {
+		t.Fatal("Expected error due to invalid path")
+	}
+	expectedOutput := `Error accessing array: strconv.ParseInt: parsing "x": invalid syntax`
+	assertResult(t, expectedOutput, err.Error())
+}
+
+func TestReadMap_with_mapsplat_array_and_bad_index(t *testing.T) {
+	var data = parseData(`
+---
+b:
+  d:
+    e:
+      - 3
+      - 4
+    f:
+      - 1
+      - 2
+`)
+	_, err := readMap(data, "b", []string{"d", "*", "x"})
+	if err == nil {
+		t.Fatal("Expected error due to invalid path")
+	}
+	expectedOutput := `Error accessing array: strconv.ParseInt: parsing "x": invalid syntax`
+	assertResult(t, expectedOutput, err.Error())
+}
+
+func TestReadMap_with_arraysplat_map_array_and_bad_index(t *testing.T) {
+	var data = parseData(`
+---
+b:
+  d:
+    - names:
+        - fred
+        - smith
+    - names:
+        - sam
+        - bo
+`)
+	_, err := readMap(data, "b", []string{"d", "*", "names", "x"})
+	if err == nil {
+		t.Fatal("Expected error due to invalid path")
+	}
+	expectedOutput := `Error accessing array: strconv.ParseInt: parsing "x": invalid syntax`
+	assertResult(t, expectedOutput, err.Error())
 }
 
 func TestReadMap_with_array_out_of_bounds(t *testing.T) {
@@ -89,7 +144,8 @@ b:
     - 3
     - 4
 `)
-	assertResult(t, nil, readMap(data, "b", []string{"d", "3"}))
+	got, _ := readMap(data, "b", []string{"d", "3"})
+	assertResult(t, nil, got)
 }
 
 func TestReadMap_with_array_out_of_bounds_by_1(t *testing.T) {
@@ -100,7 +156,8 @@ b:
     - 3
     - 4
 `)
-	assertResult(t, nil, readMap(data, "b", []string{"d", "2"}))
+	got, _ := readMap(data, "b", []string{"d", "2"})
+	assertResult(t, nil, got)
 }
 
 func TestReadMap_with_array_splat(t *testing.T) {
@@ -113,7 +170,8 @@ e:
     name: Sam
     thing: dog
 `)
-	assertResult(t, "[Fred Sam]", fmt.Sprintf("%v", readMap(data, "e", []string{"*", "name"})))
+	got, _ := readMap(data, "e", []string{"*", "name"})
+	assertResult(t, "[Fred Sam]", fmt.Sprintf("%v", got))
 }
 
 func TestWrite_really_simple(t *testing.T) {
@@ -157,7 +215,8 @@ b:
 `)
 
 	updated := writeMap(data, []string{"b", "d", "f"}, "4")
-	assertResult(t, "4", readMap(updated, "b", []string{"d", "f"}))
+	got, _ := readMap(updated, "b", []string{"d", "f"})
+	assertResult(t, "4", got)
 }
 
 func TestWrite_array(t *testing.T) {
@@ -179,7 +238,8 @@ b:
 `)
 
 	updated := writeMap(data, []string{"b", "0"}, "4")
-	assertResult(t, "4", readMap(updated, "b", []string{"0"}))
+	got, _ := readMap(updated, "b", []string{"0"})
+	assertResult(t, "4", got)
 }
 
 func TestWrite_new_array_deep(t *testing.T) {
@@ -192,7 +252,8 @@ b:
 - c: "4"`
 
 	updated := writeMap(data, []string{"b", "0", "c"}, "4")
-	assertResult(t, expected, yamlToString(updated))
+	got, _ := yamlToString(updated)
+	assertResult(t, expected, got)
 }
 
 func TestWrite_new_map_array_deep(t *testing.T) {
@@ -202,7 +263,8 @@ b:
 `)
 
 	updated := writeMap(data, []string{"b", "d", "0"}, "4")
-	assertResult(t, "4", readMap(updated, "b", []string{"d", "0"}))
+	got, _ := readMap(updated, "b", []string{"d", "0"})
+	assertResult(t, "4", got)
 }
 
 func TestWrite_add_to_array(t *testing.T) {
@@ -216,8 +278,8 @@ b:
 - bb`
 
 	updated := writeMap(data, []string{"b", "1"}, "bb")
-
-	assertResult(t, expected, yamlToString(updated))
+	got, _ := yamlToString(updated)
+	assertResult(t, expected, got)
 }
 
 func TestWrite_with_no_tail(t *testing.T) {

docs/404.html

@@ -1,17 +1,18 @@
 
 <!DOCTYPE html>
-<html class="no-js">
+<html lang="en" class="no-js">
   <head>
     
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
       
       
       
       
         <link rel="shortcut icon" href="/assets/images/favicon.png">
       
-      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.5.4">
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
     
     
       
@@ -19,10 +20,10 @@
       
     
     
-      <script src="/assets/javascripts/modernizr-56ade86843.js"></script>
+      <script src="/assets/javascripts/modernizr-e826f8942a.js"></script>
     
     
-      <link rel="stylesheet" href="/assets/stylesheets/application-b1a1975878.css">
+      <link rel="stylesheet" href="/assets/stylesheets/application-a20f419c8e.css">
       
     
     
@@ -60,10 +61,11 @@
   <nav class="md-header-nav md-grid">
     <div class="md-flex">
       <div class="md-flex__cell md-flex__cell--shrink">
-        
-          <a href="/" title="Yaml" class="md-icon md-icon--home md-header-nav__button">
-          </a>
-        
+        <a href="/" title="Yaml" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon md-icon--home"></i>
+          
+        </a>
       </div>
       <div class="md-flex__cell md-flex__cell--shrink">
         <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
@@ -80,17 +82,17 @@
         
           <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
           
-<div class="md-search" data-md-component="search">
-  <div class="md-search__overlay"></div>
+<div class="md-search" data-md-component="search" role="dialog">
+  <label class="md-search__overlay" for="search"></label>
   <div class="md-search__inner">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" required placeholder="Search" accesskey="s" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
+      <input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
       <label class="md-icon md-search__icon" for="search"></label>
-      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">close</button>
+      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
-        <div class="md-search-result" data-md-component="result">
+        <div class="md-search-result" data-md-component="result" data-md-lang-search="" data-md-lang-tokenizer="[\s\-]+">
           <div class="md-search-result__meta" data-md-lang-result-none="No matching documents" data-md-lang-result-one="1 matching document" data-md-lang-result-other="# matching documents">
             Type to start searching
           </div>
@@ -102,9 +104,9 @@
 </div>
         
       </div>
-      <div class="md-flex__cell md-flex__cell--shrink">
-        <div class="md-header-nav__source">
-          
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
             
 
 
@@ -124,9 +126,9 @@
     </div>
   </a>
 
-          
+          </div>
         </div>
-      </div>
+      
     </div>
   </nav>
 </header>
@@ -143,9 +145,11 @@
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" data-md-level="0">
   <label class="md-nav__title md-nav__title--site" for="drawer">
-    
-      <i class="md-icon md-icon--home md-nav__button"></i>
-    
+    <div class="md-nav__button md-logo">
+      
+        <i class="md-icon md-icon--home"></i>
+      
+    </div>
     Yaml
   </label>
   
@@ -233,6 +237,18 @@
   </li>
 
     
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="/merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
   </ul>
 </nav>
                   </div>
@@ -286,7 +302,9 @@
       
     </div>
     
-      <script src="/assets/javascripts/application-0b7df094bf.js"></script>
+      <script src="/assets/javascripts/application-f3ab9e5ff8.js"></script>
+      
+      
       <script>app.initialize({url:{base:""}})</script>
       
     

docs/assets/javascripts/lunr/lunr.da.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===e.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");e.da=function(){this.pipeline.reset(),this.pipeline.add(e.da.trimmer,e.da.stopWordFilter,e.da.stemmer),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add(e.da.stemmer))},e.da.wordCharacters="A-Za-zªºÀ-ÖØ-öø-ʸˠ-ˤᴀ-ᴥᴬ-ᵜᵢ-ᵥᵫ-ᵷᵹ-ᶾḀ-ỿⁱⁿₐ-ₜKÅℲⅎⅠ-ↈⱠ-ⱿꜢ-ꞇꞋ-ꞭꞰ-ꞷꟷ-ꟿꬰ-ꭚꭜ-ꭤff-stＡ-Ｚａ-ｚ",e.da.trimmer=e.trimmerSupport.generateTrimmer(e.da.wordCharacters),e.Pipeline.registerFunction(e.da.trimmer,"trimmer-da"),e.da.stemmer=function(){var r=e.stemmerSupport.Among,i=e.stemmerSupport.SnowballProgram,n=new function(){function e(){var e,r=f.cursor+3;if(d=f.limit,0<=r&&r<=f.limit){for(a=r;;){if(e=f.cursor,f.in_grouping(w,97,248)){f.cursor=e;break}if(f.cursor=e,e>=f.limit)return;f.cursor++}for(;!f.out_grouping(w,97,248);){if(f.cursor>=f.limit)return;f.cursor++}(d=f.cursor)<a&&(d=a)}}function n(){var e,r;if(f.cursor>=d&&(r=f.limit_backward,f.limit_backward=d,f.ket=f.cursor,e=f.find_among_b(c,32),f.limit_backward=r,e))switch(f.bra=f.cursor,e){case 1:f.slice_del();break;case 2:f.in_grouping_b(p,97,229)&&f.slice_del()}}function t(){var e,r=f.limit-f.cursor;f.cursor>=d&&(e=f.limit_backward,f.limit_backward=d,f.ket=f.cursor,f.find_among_b(l,4)?(f.bra=f.cursor,f.limit_backward=e,f.cursor=f.limit-r,f.cursor>f.limit_backward&&(f.cursor--,f.bra=f.cursor,f.slice_del())):f.limit_backward=e)}function s(){var e,r,i,n=f.limit-f.cursor;if(f.ket=f.cursor,f.eq_s_b(2,"st")&&(f.bra=f.cursor,f.eq_s_b(2,"ig")&&f.slice_del()),f.cursor=f.limit-n,f.cursor>=d&&(r=f.limit_backward,f.limit_backward=d,f.ket=f.cursor,e=f.find_among_b(m,5),f.limit_backward=r,e))switch(f.bra=f.cursor,e){case 1:f.slice_del(),i=f.limit-f.cursor,t(),f.cursor=f.limit-i;break;case 2:f.slice_from("løs")}}function o(){var e;f.cursor>=d&&(e=f.limit_backward,f.limit_backward=d,f.ket=f.cursor,f.out_grouping_b(w,97,248)?(f.bra=f.cursor,u=f.slice_to(u),f.limit_backward=e,f.eq_v_b(u)&&f.slice_del()):f.limit_backward=e)}var a,d,u,c=[new r("hed",-1,1),new r("ethed",0,1),new r("ered",-1,1),new r("e",-1,1),new r("erede",3,1),new r("ende",3,1),new r("erende",5,1),new r("ene",3,1),new r("erne",3,1),new r("ere",3,1),new r("en",-1,1),new r("heden",10,1),new r("eren",10,1),new r("er",-1,1),new r("heder",13,1),new r("erer",13,1),new r("s",-1,2),new r("heds",16,1),new r("es",16,1),new r("endes",18,1),new r("erendes",19,1),new r("enes",18,1),new r("ernes",18,1),new r("eres",18,1),new r("ens",16,1),new r("hedens",24,1),new r("erens",24,1),new r("ers",16,1),new r("ets",16,1),new r("erets",28,1),new r("et",-1,1),new r("eret",30,1)],l=[new r("gd",-1,-1),new r("dt",-1,-1),new r("gt",-1,-1),new r("kt",-1,-1)],m=[new r("ig",-1,1),new r("lig",0,1),new r("elig",1,1),new r("els",-1,1),new r("løst",-1,2)],w=[17,65,16,1,0,0,0,0,0,0,0,0,0,0,0,0,48,0,128],p=[239,254,42,3,0,0,0,0,0,0,0,0,0,0,0,0,16],f=new i;this.setCurrent=function(e){f.setCurrent(e)},this.getCurrent=function(){return f.getCurrent()},this.stem=function(){var r=f.cursor;return e(),f.limit_backward=r,f.cursor=f.limit,n(),f.cursor=f.limit,t(),f.cursor=f.limit,s(),f.cursor=f.limit,o(),!0}};return function(e){return"function"==typeof e.update?e.update(function(e){return n.setCurrent(e),n.stem(),n.getCurrent()}):(n.setCurrent(e),n.stem(),n.getCurrent())}}(),e.Pipeline.registerFunction(e.da.stemmer,"stemmer-da"),e.da.stopWordFilter=e.generateStopWordFilter("ad af alle alt anden at blev blive bliver da de dem den denne der deres det dette dig din disse dog du efter eller en end er et for fra ham han hans har havde have hende hendes her hos hun hvad hvis hvor i ikke ind jeg jer jo kunne man mange med meget men mig min mine mit mod ned noget nogle nu når og også om op os over på selv sig sin sine sit skal skulle som sådan thi til ud under var vi vil ville vor være været".split(" ")),e.Pipeline.registerFunction(e.da.stopWordFilter,"stopWordFilter-da")}});

docs/assets/javascripts/lunr/lunr.jp.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===e.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");var r="2"==e.version[0];e.jp=function(){this.pipeline.reset(),this.pipeline.add(e.jp.stopWordFilter,e.jp.stemmer),r?this.tokenizer=e.jp.tokenizer:(e.tokenizer&&(e.tokenizer=e.jp.tokenizer),this.tokenizerFn&&(this.tokenizerFn=e.jp.tokenizer))};var t=new e.TinySegmenter;e.jp.tokenizer=function(n){if(!arguments.length||null==n||void 0==n)return[];if(Array.isArray(n))return n.map(function(t){return r?new e.Token(t.toLowerCase()):t.toLowerCase()});for(var i=n.toString().toLowerCase().replace(/^\s+/,""),o=i.length-1;o>=0;o--)if(/\S/.test(i.charAt(o))){i=i.substring(0,o+1);break}return t.segment(i).filter(function(e){return!!e}).map(function(t){return r?new e.Token(t):t})},e.jp.stemmer=function(){return function(e){return e}}(),e.Pipeline.registerFunction(e.jp.stemmer,"stemmer-jp"),e.jp.wordCharacters="一二三四五六七八九十百千万億兆一-龠々〆ヵヶぁ-んァ-ヴーｱ-ﾝﾞa-zA-Zａ-ｚＡ-Ｚ0-9０-９",e.jp.stopWordFilter=function(t){if(-1===e.jp.stopWordFilter.stopWords.indexOf(r?t.toString():t))return t},e.jp.stopWordFilter=e.generateStopWordFilter("これ それ あれ この その あの ここ そこ あそこ こちら どこ だれ なに なん 何 私 貴方 貴方方 我々 私達 あの人 あのかた 彼女 彼 です あります おります います は が の に を で え から まで より も どの と し それで しかし".split(" ")),e.Pipeline.registerFunction(e.jp.stopWordFilter,"stopWordFilter-jp")}});

docs/assets/javascripts/lunr/lunr.multi.js

@@ -0,0 +1 @@
+!function(e,i){"function"==typeof define&&define.amd?define(i):"object"==typeof exports?module.exports=i():i()(e.lunr)}(this,function(){return function(e){e.multiLanguage=function(){for(var i=Array.prototype.slice.call(arguments),t=i.join("-"),r="",n=[],s=[],p=0;p<i.length;++p)"en"==i[p]?(r+="\\w",n.unshift(e.stopWordFilter),n.push(e.stemmer),s.push(e.stemmer)):(r+=e[i[p]].wordCharacters,n.unshift(e[i[p]].stopWordFilter),n.push(e[i[p]].stemmer),s.push(e[i[p]].stemmer));var o=e.trimmerSupport.generateTrimmer(r);return e.Pipeline.registerFunction(o,"lunr-multi-trimmer-"+t),n.unshift(o),function(){this.pipeline.reset(),this.pipeline.add.apply(this.pipeline,n),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add.apply(this.searchPipeline,s))}}}});

docs/assets/javascripts/lunr/lunr.no.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===e.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");e.no=function(){this.pipeline.reset(),this.pipeline.add(e.no.trimmer,e.no.stopWordFilter,e.no.stemmer),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add(e.no.stemmer))},e.no.wordCharacters="A-Za-zªºÀ-ÖØ-öø-ʸˠ-ˤᴀ-ᴥᴬ-ᵜᵢ-ᵥᵫ-ᵷᵹ-ᶾḀ-ỿⁱⁿₐ-ₜKÅℲⅎⅠ-ↈⱠ-ⱿꜢ-ꞇꞋ-ꞭꞰ-ꞷꟷ-ꟿꬰ-ꭚꭜ-ꭤff-stＡ-Ｚａ-ｚ",e.no.trimmer=e.trimmerSupport.generateTrimmer(e.no.wordCharacters),e.Pipeline.registerFunction(e.no.trimmer,"trimmer-no"),e.no.stemmer=function(){var r=e.stemmerSupport.Among,n=e.stemmerSupport.SnowballProgram,i=new function(){function e(){var e,r=w.cursor+3;if(a=w.limit,0<=r||r<=w.limit){for(s=r;;){if(e=w.cursor,w.in_grouping(d,97,248)){w.cursor=e;break}if(e>=w.limit)return;w.cursor=e+1}for(;!w.out_grouping(d,97,248);){if(w.cursor>=w.limit)return;w.cursor++}(a=w.cursor)<s&&(a=s)}}function i(){var e,r,n;if(w.cursor>=a&&(r=w.limit_backward,w.limit_backward=a,w.ket=w.cursor,e=w.find_among_b(m,29),w.limit_backward=r,e))switch(w.bra=w.cursor,e){case 1:w.slice_del();break;case 2:n=w.limit-w.cursor,w.in_grouping_b(c,98,122)?w.slice_del():(w.cursor=w.limit-n,w.eq_s_b(1,"k")&&w.out_grouping_b(d,97,248)&&w.slice_del());break;case 3:w.slice_from("er")}}function t(){var e,r=w.limit-w.cursor;w.cursor>=a&&(e=w.limit_backward,w.limit_backward=a,w.ket=w.cursor,w.find_among_b(u,2)?(w.bra=w.cursor,w.limit_backward=e,w.cursor=w.limit-r,w.cursor>w.limit_backward&&(w.cursor--,w.bra=w.cursor,w.slice_del())):w.limit_backward=e)}function o(){var e,r;w.cursor>=a&&(r=w.limit_backward,w.limit_backward=a,w.ket=w.cursor,(e=w.find_among_b(l,11))?(w.bra=w.cursor,w.limit_backward=r,1==e&&w.slice_del()):w.limit_backward=r)}var s,a,m=[new r("a",-1,1),new r("e",-1,1),new r("ede",1,1),new r("ande",1,1),new r("ende",1,1),new r("ane",1,1),new r("ene",1,1),new r("hetene",6,1),new r("erte",1,3),new r("en",-1,1),new r("heten",9,1),new r("ar",-1,1),new r("er",-1,1),new r("heter",12,1),new r("s",-1,2),new r("as",14,1),new r("es",14,1),new r("edes",16,1),new r("endes",16,1),new r("enes",16,1),new r("hetenes",19,1),new r("ens",14,1),new r("hetens",21,1),new r("ers",14,1),new r("ets",14,1),new r("et",-1,1),new r("het",25,1),new r("ert",-1,3),new r("ast",-1,1)],u=[new r("dt",-1,-1),new r("vt",-1,-1)],l=[new r("leg",-1,1),new r("eleg",0,1),new r("ig",-1,1),new r("eig",2,1),new r("lig",2,1),new r("elig",4,1),new r("els",-1,1),new r("lov",-1,1),new r("elov",7,1),new r("slov",7,1),new r("hetslov",9,1)],d=[17,65,16,1,0,0,0,0,0,0,0,0,0,0,0,0,48,0,128],c=[119,125,149,1],w=new n;this.setCurrent=function(e){w.setCurrent(e)},this.getCurrent=function(){return w.getCurrent()},this.stem=function(){var r=w.cursor;return e(),w.limit_backward=r,w.cursor=w.limit,i(),w.cursor=w.limit,t(),w.cursor=w.limit,o(),!0}};return function(e){return"function"==typeof e.update?e.update(function(e){return i.setCurrent(e),i.stem(),i.getCurrent()}):(i.setCurrent(e),i.stem(),i.getCurrent())}}(),e.Pipeline.registerFunction(e.no.stemmer,"stemmer-no"),e.no.stopWordFilter=e.generateStopWordFilter("alle at av bare begge ble blei bli blir blitt både båe da de deg dei deim deira deires dem den denne der dere deres det dette di din disse ditt du dykk dykkar då eg ein eit eitt eller elles en enn er et ett etter for fordi fra før ha hadde han hans har hennar henne hennes her hjå ho hoe honom hoss hossen hun hva hvem hver hvilke hvilken hvis hvor hvordan hvorfor i ikke ikkje ikkje ingen ingi inkje inn inni ja jeg kan kom korleis korso kun kunne kva kvar kvarhelst kven kvi kvifor man mange me med medan meg meget mellom men mi min mine mitt mot mykje ned no noe noen noka noko nokon nokor nokre nå når og også om opp oss over på samme seg selv si si sia sidan siden sin sine sitt sjøl skal skulle slik so som som somme somt så sånn til um upp ut uten var vart varte ved vere verte vi vil ville vore vors vort vår være være vært å".split(" ")),e.Pipeline.registerFunction(e.no.stopWordFilter,"stopWordFilter-no")}});

docs/assets/javascripts/lunr/lunr.stemmer.support.js

@@ -0,0 +1 @@
+!function(r,t){"function"==typeof define&&define.amd?define(t):"object"==typeof exports?module.exports=t():t()(r.lunr)}(this,function(){return function(r){r.stemmerSupport={Among:function(r,t,i,s){if(this.toCharArray=function(r){for(var t=r.length,i=new Array(t),s=0;s<t;s++)i[s]=r.charCodeAt(s);return i},!r&&""!=r||!t&&0!=t||!i)throw"Bad Among initialisation: s:"+r+", substring_i: "+t+", result: "+i;this.s_size=r.length,this.s=this.toCharArray(r),this.substring_i=t,this.result=i,this.method=s},SnowballProgram:function(){var r;return{bra:0,ket:0,limit:0,cursor:0,limit_backward:0,setCurrent:function(t){r=t,this.cursor=0,this.limit=t.length,this.limit_backward=0,this.bra=this.cursor,this.ket=this.limit},getCurrent:function(){var t=r;return r=null,t},in_grouping:function(t,i,s){if(this.cursor<this.limit){var e=r.charCodeAt(this.cursor);if(e<=s&&e>=i&&(e-=i,t[e>>3]&1<<(7&e)))return this.cursor++,!0}return!1},in_grouping_b:function(t,i,s){if(this.cursor>this.limit_backward){var e=r.charCodeAt(this.cursor-1);if(e<=s&&e>=i&&(e-=i,t[e>>3]&1<<(7&e)))return this.cursor--,!0}return!1},out_grouping:function(t,i,s){if(this.cursor<this.limit){var e=r.charCodeAt(this.cursor);if(e>s||e<i)return this.cursor++,!0;if(e-=i,!(t[e>>3]&1<<(7&e)))return this.cursor++,!0}return!1},out_grouping_b:function(t,i,s){if(this.cursor>this.limit_backward){var e=r.charCodeAt(this.cursor-1);if(e>s||e<i)return this.cursor--,!0;if(e-=i,!(t[e>>3]&1<<(7&e)))return this.cursor--,!0}return!1},eq_s:function(t,i){if(this.limit-this.cursor<t)return!1;for(var s=0;s<t;s++)if(r.charCodeAt(this.cursor+s)!=i.charCodeAt(s))return!1;return this.cursor+=t,!0},eq_s_b:function(t,i){if(this.cursor-this.limit_backward<t)return!1;for(var s=0;s<t;s++)if(r.charCodeAt(this.cursor-t+s)!=i.charCodeAt(s))return!1;return this.cursor-=t,!0},find_among:function(t,i){for(var s=0,e=i,n=this.cursor,u=this.limit,o=0,h=0,c=!1;;){for(var a=s+(e-s>>1),f=0,l=o<h?o:h,_=t[a],m=l;m<_.s_size;m++){if(n+l==u){f=-1;break}if(f=r.charCodeAt(n+l)-_.s[m])break;l++}if(f<0?(e=a,h=l):(s=a,o=l),e-s<=1){if(s>0||e==s||c)break;c=!0}}for(;;){if(o>=(_=t[s]).s_size){if(this.cursor=n+_.s_size,!_.method)return _.result;var b=_.method();if(this.cursor=n+_.s_size,b)return _.result}if((s=_.substring_i)<0)return 0}},find_among_b:function(t,i){for(var s=0,e=i,n=this.cursor,u=this.limit_backward,o=0,h=0,c=!1;;){for(var a=s+(e-s>>1),f=0,l=o<h?o:h,_=(m=t[a]).s_size-1-l;_>=0;_--){if(n-l==u){f=-1;break}if(f=r.charCodeAt(n-1-l)-m.s[_])break;l++}if(f<0?(e=a,h=l):(s=a,o=l),e-s<=1){if(s>0||e==s||c)break;c=!0}}for(;;){var m=t[s];if(o>=m.s_size){if(this.cursor=n-m.s_size,!m.method)return m.result;var b=m.method();if(this.cursor=n-m.s_size,b)return m.result}if((s=m.substring_i)<0)return 0}},replace_s:function(t,i,s){var e=s.length-(i-t),n=r.substring(0,t),u=r.substring(i);return r=n+s+u,this.limit+=e,this.cursor>=i?this.cursor+=e:this.cursor>t&&(this.cursor=t),e},slice_check:function(){if(this.bra<0||this.bra>this.ket||this.ket>this.limit||this.limit>r.length)throw"faulty slice operation"},slice_from:function(r){this.slice_check(),this.replace_s(this.bra,this.ket,r)},slice_del:function(){this.slice_from("")},insert:function(r,t,i){var s=this.replace_s(r,t,i);r<=this.bra&&(this.bra+=s),r<=this.ket&&(this.ket+=s)},slice_to:function(){return this.slice_check(),r.substring(this.bra,this.ket)},eq_v_b:function(r){return this.eq_s_b(r.length,r)}}}},r.trimmerSupport={generateTrimmer:function(r){var t=new RegExp("^[^"+r+"]+"),i=new RegExp("[^"+r+"]+$");return function(r){return"function"==typeof r.update?r.update(function(r){return r.replace(t,"").replace(i,"")}):r.replace(t,"").replace(i,"")}}}}});

docs/assets/javascripts/lunr/lunr.sv.js

@@ -0,0 +1 @@
+!function(e,r){"function"==typeof define&&define.amd?define(r):"object"==typeof exports?module.exports=r():r()(e.lunr)}(this,function(){return function(e){if(void 0===e)throw new Error("Lunr is not present. Please include / require Lunr before this script.");if(void 0===e.stemmerSupport)throw new Error("Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script.");e.sv=function(){this.pipeline.reset(),this.pipeline.add(e.sv.trimmer,e.sv.stopWordFilter,e.sv.stemmer),this.searchPipeline&&(this.searchPipeline.reset(),this.searchPipeline.add(e.sv.stemmer))},e.sv.wordCharacters="A-Za-zªºÀ-ÖØ-öø-ʸˠ-ˤᴀ-ᴥᴬ-ᵜᵢ-ᵥᵫ-ᵷᵹ-ᶾḀ-ỿⁱⁿₐ-ₜKÅℲⅎⅠ-ↈⱠ-ⱿꜢ-ꞇꞋ-ꞭꞰ-ꞷꟷ-ꟿꬰ-ꭚꭜ-ꭤff-stＡ-Ｚａ-ｚ",e.sv.trimmer=e.trimmerSupport.generateTrimmer(e.sv.wordCharacters),e.Pipeline.registerFunction(e.sv.trimmer,"trimmer-sv"),e.sv.stemmer=function(){var r=e.stemmerSupport.Among,n=e.stemmerSupport.SnowballProgram,t=new function(){function e(){var e,r=w.cursor+3;if(o=w.limit,0<=r||r<=w.limit){for(a=r;;){if(e=w.cursor,w.in_grouping(l,97,246)){w.cursor=e;break}if(w.cursor=e,w.cursor>=w.limit)return;w.cursor++}for(;!w.out_grouping(l,97,246);){if(w.cursor>=w.limit)return;w.cursor++}(o=w.cursor)<a&&(o=a)}}function t(){var e,r=w.limit_backward;if(w.cursor>=o&&(w.limit_backward=o,w.cursor=w.limit,w.ket=w.cursor,e=w.find_among_b(u,37),w.limit_backward=r,e))switch(w.bra=w.cursor,e){case 1:w.slice_del();break;case 2:w.in_grouping_b(d,98,121)&&w.slice_del()}}function i(){var e=w.limit_backward;w.cursor>=o&&(w.limit_backward=o,w.cursor=w.limit,w.find_among_b(c,7)&&(w.cursor=w.limit,w.ket=w.cursor,w.cursor>w.limit_backward&&(w.bra=--w.cursor,w.slice_del())),w.limit_backward=e)}function s(){var e,r;if(w.cursor>=o){if(r=w.limit_backward,w.limit_backward=o,w.cursor=w.limit,w.ket=w.cursor,e=w.find_among_b(m,5))switch(w.bra=w.cursor,e){case 1:w.slice_del();break;case 2:w.slice_from("lös");break;case 3:w.slice_from("full")}w.limit_backward=r}}var a,o,u=[new r("a",-1,1),new r("arna",0,1),new r("erna",0,1),new r("heterna",2,1),new r("orna",0,1),new r("ad",-1,1),new r("e",-1,1),new r("ade",6,1),new r("ande",6,1),new r("arne",6,1),new r("are",6,1),new r("aste",6,1),new r("en",-1,1),new r("anden",12,1),new r("aren",12,1),new r("heten",12,1),new r("ern",-1,1),new r("ar",-1,1),new r("er",-1,1),new r("heter",18,1),new r("or",-1,1),new r("s",-1,2),new r("as",21,1),new r("arnas",22,1),new r("ernas",22,1),new r("ornas",22,1),new r("es",21,1),new r("ades",26,1),new r("andes",26,1),new r("ens",21,1),new r("arens",29,1),new r("hetens",29,1),new r("erns",21,1),new r("at",-1,1),new r("andet",-1,1),new r("het",-1,1),new r("ast",-1,1)],c=[new r("dd",-1,-1),new r("gd",-1,-1),new r("nn",-1,-1),new r("dt",-1,-1),new r("gt",-1,-1),new r("kt",-1,-1),new r("tt",-1,-1)],m=[new r("ig",-1,1),new r("lig",0,1),new r("els",-1,1),new r("fullt",-1,3),new r("löst",-1,2)],l=[17,65,16,1,0,0,0,0,0,0,0,0,0,0,0,0,24,0,32],d=[119,127,149],w=new n;this.setCurrent=function(e){w.setCurrent(e)},this.getCurrent=function(){return w.getCurrent()},this.stem=function(){var r=w.cursor;return e(),w.limit_backward=r,w.cursor=w.limit,t(),w.cursor=w.limit,i(),w.cursor=w.limit,s(),!0}};return function(e){return"function"==typeof e.update?e.update(function(e){return t.setCurrent(e),t.stem(),t.getCurrent()}):(t.setCurrent(e),t.stem(),t.getCurrent())}}(),e.Pipeline.registerFunction(e.sv.stemmer,"stemmer-sv"),e.sv.stopWordFilter=e.generateStopWordFilter("alla allt att av blev bli blir blivit de dem den denna deras dess dessa det detta dig din dina ditt du där då efter ej eller en er era ert ett från för ha hade han hans har henne hennes hon honom hur här i icke ingen inom inte jag ju kan kunde man med mellan men mig min mina mitt mot mycket ni nu när någon något några och om oss på samma sedan sig sin sina sitta själv skulle som så sådan sådana sådant till under upp ut utan vad var vara varför varit varje vars vart vem vi vid vilka vilkas vilken vilket vår våra vårt än är åt över".split(" ")),e.Pipeline.registerFunction(e.sv.stopWordFilter,"stopWordFilter-sv")}});

docs/convert/index.html

@@ -1,17 +1,18 @@
 
 <!DOCTYPE html>
-<html class="no-js">
+<html lang="en" class="no-js">
   <head>
     
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
       
       
       
       
         <link rel="shortcut icon" href="../assets/images/favicon.png">
       
-      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.5.4">
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
     
     
       
@@ -19,10 +20,10 @@
       
     
     
-      <script src="../assets/javascripts/modernizr-56ade86843.js"></script>
+      <script src="../assets/javascripts/modernizr-e826f8942a.js"></script>
     
     
-      <link rel="stylesheet" href="../assets/stylesheets/application-b1a1975878.css">
+      <link rel="stylesheet" href="../assets/stylesheets/application-a20f419c8e.css">
       
     
     
@@ -60,10 +61,11 @@
   <nav class="md-header-nav md-grid">
     <div class="md-flex">
       <div class="md-flex__cell md-flex__cell--shrink">
-        
-          <a href=".." title="Yaml" class="md-icon md-icon--home md-header-nav__button">
-          </a>
-        
+        <a href=".." title="Yaml" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon md-icon--home"></i>
+          
+        </a>
       </div>
       <div class="md-flex__cell md-flex__cell--shrink">
         <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
@@ -82,17 +84,17 @@
         
           <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
           
-<div class="md-search" data-md-component="search">
-  <div class="md-search__overlay"></div>
+<div class="md-search" data-md-component="search" role="dialog">
+  <label class="md-search__overlay" for="search"></label>
   <div class="md-search__inner">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" required placeholder="Search" accesskey="s" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
+      <input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
       <label class="md-icon md-search__icon" for="search"></label>
-      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">close</button>
+      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
-        <div class="md-search-result" data-md-component="result">
+        <div class="md-search-result" data-md-component="result" data-md-lang-search="" data-md-lang-tokenizer="[\s\-]+">
           <div class="md-search-result__meta" data-md-lang-result-none="No matching documents" data-md-lang-result-one="1 matching document" data-md-lang-result-other="# matching documents">
             Type to start searching
           </div>
@@ -104,9 +106,9 @@
 </div>
         
       </div>
-      <div class="md-flex__cell md-flex__cell--shrink">
-        <div class="md-header-nav__source">
-          
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
             
 
 
@@ -126,9 +128,9 @@
     </div>
   </a>
 
-          
+          </div>
         </div>
-      </div>
+      
     </div>
   </nav>
 </header>
@@ -145,9 +147,11 @@
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" data-md-level="0">
   <label class="md-nav__title md-nav__title--site" for="drawer">
-    
-      <i class="md-icon md-icon--home md-nav__button"></i>
-    
+    <div class="md-nav__button md-logo">
+      
+        <i class="md-icon md-icon--home"></i>
+      
+    </div>
     Yaml
   </label>
   
@@ -274,6 +278,18 @@
   </li>
 
     
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
   </ul>
 </nav>
                   </div>
@@ -389,6 +405,20 @@ b:
           </a>
         
         
+          <a href="../merge/" title="Merge" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel="next">
+            <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title">
+              <span class="md-flex__ellipsis">
+                <span class="md-footer-nav__direction">
+                  Next
+                </span>
+                Merge
+              </span>
+            </div>
+            <div class="md-flex__cell md-flex__cell--shrink">
+              <i class="md-icon md-icon--arrow-forward md-footer-nav__button"></i>
+            </div>
+          </a>
+        
       </nav>
     </div>
   
@@ -421,7 +451,9 @@ b:
       
     </div>
     
-      <script src="../assets/javascripts/application-0b7df094bf.js"></script>
+      <script src="../assets/javascripts/application-f3ab9e5ff8.js"></script>
+      
+      
       <script>app.initialize({url:{base:".."}})</script>
       
     

docs/create/index.html

@@ -1,17 +1,18 @@
 
 <!DOCTYPE html>
-<html class="no-js">
+<html lang="en" class="no-js">
   <head>
     
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
       
       
       
       
         <link rel="shortcut icon" href="../assets/images/favicon.png">
       
-      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.5.4">
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
     
     
       
@@ -19,10 +20,10 @@
       
     
     
-      <script src="../assets/javascripts/modernizr-56ade86843.js"></script>
+      <script src="../assets/javascripts/modernizr-e826f8942a.js"></script>
     
     
-      <link rel="stylesheet" href="../assets/stylesheets/application-b1a1975878.css">
+      <link rel="stylesheet" href="../assets/stylesheets/application-a20f419c8e.css">
       
     
     
@@ -60,10 +61,11 @@
   <nav class="md-header-nav md-grid">
     <div class="md-flex">
       <div class="md-flex__cell md-flex__cell--shrink">
-        
-          <a href=".." title="Yaml" class="md-icon md-icon--home md-header-nav__button">
-          </a>
-        
+        <a href=".." title="Yaml" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon md-icon--home"></i>
+          
+        </a>
       </div>
       <div class="md-flex__cell md-flex__cell--shrink">
         <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
@@ -82,17 +84,17 @@
         
           <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
           
-<div class="md-search" data-md-component="search">
-  <div class="md-search__overlay"></div>
+<div class="md-search" data-md-component="search" role="dialog">
+  <label class="md-search__overlay" for="search"></label>
   <div class="md-search__inner">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" required placeholder="Search" accesskey="s" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
+      <input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
       <label class="md-icon md-search__icon" for="search"></label>
-      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">close</button>
+      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
-        <div class="md-search-result" data-md-component="result">
+        <div class="md-search-result" data-md-component="result" data-md-lang-search="" data-md-lang-tokenizer="[\s\-]+">
           <div class="md-search-result__meta" data-md-lang-result-none="No matching documents" data-md-lang-result-one="1 matching document" data-md-lang-result-other="# matching documents">
             Type to start searching
           </div>
@@ -104,9 +106,9 @@
 </div>
         
       </div>
-      <div class="md-flex__cell md-flex__cell--shrink">
-        <div class="md-header-nav__source">
-          
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
             
 
 
@@ -126,9 +128,9 @@
     </div>
   </a>
 
-          
+          </div>
         </div>
-      </div>
+      
     </div>
   </nav>
 </header>
@@ -145,9 +147,11 @@
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" data-md-level="0">
   <label class="md-nav__title md-nav__title--site" for="drawer">
-    
-      <i class="md-icon md-icon--home md-nav__button"></i>
-    
+    <div class="md-nav__button md-logo">
+      
+        <i class="md-icon md-icon--home"></i>
+      
+    </div>
     Yaml
   </label>
   
@@ -274,6 +278,18 @@
   </li>
 
     
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
   </ul>
 </nav>
                   </div>
@@ -436,7 +452,9 @@ b.e[0].name: Howdy Partner
       
     </div>
     
-      <script src="../assets/javascripts/application-0b7df094bf.js"></script>
+      <script src="../assets/javascripts/application-f3ab9e5ff8.js"></script>
+      
+      
       <script>app.initialize({url:{base:".."}})</script>
       
     

docs/index.html

@@ -1,17 +1,18 @@
 
 <!DOCTYPE html>
-<html class="no-js">
+<html lang="en" class="no-js">
   <head>
     
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
       
       
       
       
         <link rel="shortcut icon" href="./assets/images/favicon.png">
       
-      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.5.4">
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
     
     
       
@@ -19,10 +20,10 @@
       
     
     
-      <script src="./assets/javascripts/modernizr-56ade86843.js"></script>
+      <script src="./assets/javascripts/modernizr-e826f8942a.js"></script>
     
     
-      <link rel="stylesheet" href="./assets/stylesheets/application-b1a1975878.css">
+      <link rel="stylesheet" href="./assets/stylesheets/application-a20f419c8e.css">
       
     
     
@@ -60,10 +61,11 @@
   <nav class="md-header-nav md-grid">
     <div class="md-flex">
       <div class="md-flex__cell md-flex__cell--shrink">
-        
-          <a href="." title="Yaml" class="md-icon md-icon--home md-header-nav__button">
-          </a>
-        
+        <a href="." title="Yaml" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon md-icon--home"></i>
+          
+        </a>
       </div>
       <div class="md-flex__cell md-flex__cell--shrink">
         <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
@@ -82,17 +84,17 @@
         
           <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
           
-<div class="md-search" data-md-component="search">
-  <div class="md-search__overlay"></div>
+<div class="md-search" data-md-component="search" role="dialog">
+  <label class="md-search__overlay" for="search"></label>
   <div class="md-search__inner">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" required placeholder="Search" accesskey="s" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
+      <input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
       <label class="md-icon md-search__icon" for="search"></label>
-      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">close</button>
+      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
-        <div class="md-search-result" data-md-component="result">
+        <div class="md-search-result" data-md-component="result" data-md-lang-search="" data-md-lang-tokenizer="[\s\-]+">
           <div class="md-search-result__meta" data-md-lang-result-none="No matching documents" data-md-lang-result-one="1 matching document" data-md-lang-result-other="# matching documents">
             Type to start searching
           </div>
@@ -104,9 +106,9 @@
 </div>
         
       </div>
-      <div class="md-flex__cell md-flex__cell--shrink">
-        <div class="md-header-nav__source">
-          
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
             
 
 
@@ -126,9 +128,9 @@
     </div>
   </a>
 
-          
+          </div>
         </div>
-      </div>
+      
     </div>
   </nav>
 </header>
@@ -145,9 +147,11 @@
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" data-md-level="0">
   <label class="md-nav__title md-nav__title--site" for="drawer">
-    
-      <i class="md-icon md-icon--home md-nav__button"></i>
-    
+    <div class="md-nav__button md-logo">
+      
+        <i class="md-icon md-icon--home"></i>
+      
+    </div>
     Yaml
   </label>
   
@@ -278,6 +282,18 @@
   </li>
 
     
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
   </ul>
 </nav>
                   </div>
@@ -402,7 +418,9 @@
       
     </div>
     
-      <script src="./assets/javascripts/application-0b7df094bf.js"></script>
+      <script src="./assets/javascripts/application-f3ab9e5ff8.js"></script>
+      
+      
       <script>app.initialize({url:{base:"."}})</script>
       
     

docs/merge/index.html

@@ -0,0 +1,543 @@
+
+<!DOCTYPE html>
+<html lang="en" class="no-js">
+  <head>
+    
+      <meta charset="utf-8">
+      <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
+      
+      
+      
+      
+        <link rel="shortcut icon" href="../assets/images/favicon.png">
+      
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
+    
+    
+      
+        <title>Merge - Yaml</title>
+      
+    
+    
+      <script src="../assets/javascripts/modernizr-e826f8942a.js"></script>
+    
+    
+      <link rel="stylesheet" href="../assets/stylesheets/application-a20f419c8e.css">
+      
+    
+    
+      
+        
+        
+        
+        <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,400i,700|Roboto+Mono">
+        <style>body,input{font-family:"Roboto","Helvetica Neue",Helvetica,Arial,sans-serif}code,kbd,pre{font-family:"Roboto Mono","Courier New",Courier,monospace}</style>
+      
+      <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
+    
+    
+    
+  </head>
+  
+  
+  
+  
+    <body>
+  
+    <svg class="md-svg">
+      <defs>
+        
+        
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+    <div class="md-source__repository">
+      mikefarah/yaml
+    </div>
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+
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+    
+    <div class="md-container">
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+    <a href="../write/" title="Write/Update" class="md-nav__link">
+      Write/Update
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+      
+      
+
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+  <li class="md-nav__item">
+    <a href="../create/" title="Create" class="md-nav__link">
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+      Merge
+    </a>
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+      
+<nav class="md-nav md-nav--secondary">
+  
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+  
+    <label class="md-nav__title" for="toc">Table of contents</label>
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+      
+        <li class="md-nav__item">
+  <a href="#to-stdout" title="To Stdout" class="md-nav__link">
+    To Stdout
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#updating-files-in-place" title="Updating files in-place" class="md-nav__link">
+    Updating files in-place
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#overwrite-values" title="Overwrite values" class="md-nav__link">
+    Overwrite values
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#overwrite-values-with-arrays" title="Overwrite values with arrays" class="md-nav__link">
+    Overwrite values with arrays
+  </a>
+  
+</li>
+      
+      
+      
+    </ul>
+  
+</nav>
+    
+  </li>
+
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+                  </div>
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+                  <div class="md-sidebar__inner">
+                    
+<nav class="md-nav md-nav--secondary">
+  
+  
+  
+    <label class="md-nav__title" for="toc">Table of contents</label>
+    <ul class="md-nav__list" data-md-scrollfix>
+      
+        <li class="md-nav__item">
+  <a href="#to-stdout" title="To Stdout" class="md-nav__link">
+    To Stdout
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#updating-files-in-place" title="Updating files in-place" class="md-nav__link">
+    Updating files in-place
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#overwrite-values" title="Overwrite values" class="md-nav__link">
+    Overwrite values
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#overwrite-values-with-arrays" title="Overwrite values with arrays" class="md-nav__link">
+    Overwrite values with arrays
+  </a>
+  
+</li>
+      
+      
+      
+    </ul>
+  
+</nav>
+                  </div>
+                </div>
+              </div>
+            
+          
+          <div class="md-content">
+            <article class="md-content__inner md-typeset">
+              
+                
+                
+                  <h1>Merge</h1>
+                
+                <p>Yaml files can be merged using the 'merge' command. Each additional file merged with the first file will
+set values for any key not existing already or where the key has no value.</p>
+<pre><code>yaml m &lt;yaml_file|json_file&gt; &lt;path&gt;...
+</code></pre>
+
+<p>This command can take a json file as input too, and will output yaml unless specified to export as json (-j)</p>
+<h3 id="to-stdout">To Stdout<a class="headerlink" href="#to-stdout" title="Permanent link">&para;</a></h3>
+<p>Given a data1.yaml file of:</p>
+<pre><code class="yaml">a: simple
+b: [1, 2]
+</code></pre>
+
+<p>and data2.yaml file of:</p>
+<pre><code class="yaml">a: other
+c:
+  test: 1
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yaml m data1.yaml data2.yaml
+</code></pre>
+
+<p>will output:</p>
+<pre><code class="yaml">a: simple
+b: [1, 2]
+c:
+  test: 1
+</code></pre>
+
+<h3 id="updating-files-in-place">Updating files in-place<a class="headerlink" href="#updating-files-in-place" title="Permanent link">&para;</a></h3>
+<p>Given a data1.yaml file of:</p>
+<pre><code class="yaml">a: simple
+b: [1, 2]
+</code></pre>
+
+<p>and data2.yaml file of:</p>
+<pre><code class="yaml">a: other
+c:
+  test: 1
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yaml m -i data1.yaml data2.yaml
+</code></pre>
+
+<p>will update the data1.yaml file so that the value of 'c' is 'test: 1'.</p>
+<h3 id="overwrite-values">Overwrite values<a class="headerlink" href="#overwrite-values" title="Permanent link">&para;</a></h3>
+<p>Given a data1.yaml file of:</p>
+<pre><code class="yaml">a: simple
+b: [1, 2]
+</code></pre>
+
+<p>and data2.yaml file of:</p>
+<pre><code class="yaml">a: other
+c:
+  test: 1
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yaml m -x data1.yaml data2.yaml
+</code></pre>
+
+<p>will output:</p>
+<pre><code class="yaml">a: other
+b: [1, 2]
+c:
+  test: 1
+</code></pre>
+
+<h3 id="overwrite-values-with-arrays">Overwrite values with arrays<a class="headerlink" href="#overwrite-values-with-arrays" title="Permanent link">&para;</a></h3>
+<p>Given a data1.yaml file of:</p>
+<pre><code class="yaml">a: simple
+b: [1, 2]
+</code></pre>
+
+<p>and data3.yaml file of:</p>
+<pre><code class="yaml">b: [2, 3, 4]
+c:
+  test: 2
+  other: true
+d: false
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yaml m -x data1.yaml data3.yaml
+</code></pre>
+
+<p>will output:</p>
+<pre><code class="yaml">a: simple
+b: [2, 3, 4]
+c:
+  test: 2
+  other: true
+d: false
+</code></pre>
+
+<p>Notice that 'b' does not result in the merging of the values within an array. The underlying library does not
+currently handle merging values within an array.</p>
+                
+                  
+                
+              
+              
+                
+              
+            </article>
+          </div>
+        </div>
+      </main>
+      
+        
+<footer class="md-footer">
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+</html>

docs/mkdocs/search_index.json

@@ -57,7 +57,7 @@
         }, 
         {
             "location": "/write/", 
-            "text": "yaml w \nyaml_file|json_file\n \npath\n \nnew value\n\n\n\n\n\nThis command can take a json file as input too, and will output yaml unless specified to export as json (-j)\n\n\nTo Stdout\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyaml w sample.yaml b.c cat\n\n\n\n\nwill output:\n\n\nb:\n  c: cat\n\n\n\n\nFrom STDIN\n\n\ncat sample.yaml | yaml w - b.c blah\n\n\n\n\nAdding new fields\n\n\nAny missing fields in the path will be created on the fly.\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyaml w sample.yaml b.d[0] \nnew thing\n\n\n\n\n\nwill output:\n\n\nb:\n  c: cat\n  d:\n    - new thing\n\n\n\n\nUpdating files in-place\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyaml w -i sample.yaml b.c cat\n\n\n\n\nwill update the sample.yaml file so that the value of 'c' is cat.\n\n\nUpdating multiple values with a script\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n  e:\n    - name: Billy Bob\n\n\n\n\nand a script update_instructions.yaml of:\n\n\nb.c: 3\nb.e[0].name: Howdy Partner\n\n\n\n\nthen\n\n\nyaml w -s update_instructions.yaml sample.yaml\n\n\n\n\nwill output:\n\n\nb:\n  c: 3\n  e:\n    - name: Howdy Partner\n\n\n\n\nAnd, of course, you can pipe the instructions in using '-':\n\n\ncat update_instructions.yaml | yaml w -s - sample.yaml\n\n\n\n\nValues starting with a hyphen (or dash)\n\n\nThe flag terminator needs to be used to stop the app from attempting to parse the subsequent arguments as flags:\n\n\nyaml w -- my.path -3\n\n\n\n\nwill output\n\n\nmy:\n  path: -3", 
+            "text": "yaml w \nyaml_file|json_file\n \npath\n \nnew value\n\n\n\n\n\nThis command can take a json file as input too, and will output yaml unless specified to export as json (-j)\n\n\nTo Stdout\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyaml w sample.yaml b.c cat\n\n\n\n\nwill output:\n\n\nb:\n  c: cat\n\n\n\n\nFrom STDIN\n\n\ncat sample.yaml | yaml w - b.c blah\n\n\n\n\nAdding new fields\n\n\nAny missing fields in the path will be created on the fly.\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyaml w sample.yaml b.d[0] \nnew thing\n\n\n\n\n\nwill output:\n\n\nb:\n  c: cat\n  d:\n    - new thing\n\n\n\n\nAppending value to an array field\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n  d:\n    - new thing\n    - foo thing\n\n\n\n\nthen\n\n\nyaml w sample.yaml b.d[+] \nbar thing\n\n\n\n\n\nwill output:\n\n\nb:\n  c: cat\n  d:\n    - new thing\n    - foo thing\n    - bar thing\n\n\n\n\nUpdating files in-place\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyaml w -i sample.yaml b.c cat\n\n\n\n\nwill update the sample.yaml file so that the value of 'c' is cat.\n\n\nUpdating multiple values with a script\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n  e:\n    - name: Billy Bob\n\n\n\n\nand a script update_instructions.yaml of:\n\n\nb.c: 3\nb.e[0].name: Howdy Partner\n\n\n\n\nthen\n\n\nyaml w -s update_instructions.yaml sample.yaml\n\n\n\n\nwill output:\n\n\nb:\n  c: 3\n  e:\n    - name: Howdy Partner\n\n\n\n\nAnd, of course, you can pipe the instructions in using '-':\n\n\ncat update_instructions.yaml | yaml w -s - sample.yaml\n\n\n\n\nValues starting with a hyphen (or dash)\n\n\nThe flag terminator needs to be used to stop the app from attempting to parse the subsequent arguments as flags:\n\n\nyaml w -- my.path -3\n\n\n\n\nwill output\n\n\nmy:\n  path: -3", 
             "title": "Write/Update"
         }, 
         {
@@ -75,6 +75,11 @@
             "text": "Any missing fields in the path will be created on the fly.  Given a sample.yaml file of:  b:\n  c: 2  then  yaml w sample.yaml b.d[0]  new thing   will output:  b:\n  c: cat\n  d:\n    - new thing", 
             "title": "Adding new fields"
         }, 
+        {
+            "location": "/write/#appending-value-to-an-array-field", 
+            "text": "Given a sample.yaml file of:  b:\n  c: 2\n  d:\n    - new thing\n    - foo thing  then  yaml w sample.yaml b.d[+]  bar thing   will output:  b:\n  c: cat\n  d:\n    - new thing\n    - foo thing\n    - bar thing", 
+            "title": "Appending value to an array field"
+        }, 
         {
             "location": "/write/#updating-files-in-place", 
             "text": "Given a sample.yaml file of:  b:\n  c: 2  then  yaml w -i sample.yaml b.c cat  will update the sample.yaml file so that the value of 'c' is cat.", 
@@ -119,6 +124,31 @@
             "location": "/convert/#json-to-yaml", 
             "text": "To read in json, just pass in a json file instead of yaml, it will just work :)  e.g given a json file  { a : Easy! as one two three , b :{ c :2, d :[3,4]}}  then  yaml r sample.json  will output  a: Easy! as one two three\nb:\n  c: 2\n  d:\n  - 3\n  - 4", 
             "title": "Json to Yaml"
+        }, 
+        {
+            "location": "/merge/", 
+            "text": "Yaml files can be merged using the 'merge' command. Each additional file merged with the first file will\nset values for any key not existing already or where the key has no value.\n\n\nyaml m \nyaml_file|json_file\n \npath\n...\n\n\n\n\nThis command can take a json file as input too, and will output yaml unless specified to export as json (-j)\n\n\nTo Stdout\n\n\nGiven a data1.yaml file of:\n\n\na: simple\nb: [1, 2]\n\n\n\n\nand data2.yaml file of:\n\n\na: other\nc:\n  test: 1\n\n\n\n\nthen\n\n\nyaml m data1.yaml data2.yaml\n\n\n\n\nwill output:\n\n\na: simple\nb: [1, 2]\nc:\n  test: 1\n\n\n\n\nUpdating files in-place\n\n\nGiven a data1.yaml file of:\n\n\na: simple\nb: [1, 2]\n\n\n\n\nand data2.yaml file of:\n\n\na: other\nc:\n  test: 1\n\n\n\n\nthen\n\n\nyaml m -i data1.yaml data2.yaml\n\n\n\n\nwill update the data1.yaml file so that the value of 'c' is 'test: 1'.\n\n\nOverwrite values\n\n\nGiven a data1.yaml file of:\n\n\na: simple\nb: [1, 2]\n\n\n\n\nand data2.yaml file of:\n\n\na: other\nc:\n  test: 1\n\n\n\n\nthen\n\n\nyaml m -x data1.yaml data2.yaml\n\n\n\n\nwill output:\n\n\na: other\nb: [1, 2]\nc:\n  test: 1\n\n\n\n\nOverwrite values with arrays\n\n\nGiven a data1.yaml file of:\n\n\na: simple\nb: [1, 2]\n\n\n\n\nand data3.yaml file of:\n\n\nb: [2, 3, 4]\nc:\n  test: 2\n  other: true\nd: false\n\n\n\n\nthen\n\n\nyaml m -x data1.yaml data3.yaml\n\n\n\n\nwill output:\n\n\na: simple\nb: [2, 3, 4]\nc:\n  test: 2\n  other: true\nd: false\n\n\n\n\nNotice that 'b' does not result in the merging of the values within an array. The underlying library does not\ncurrently handle merging values within an array.", 
+            "title": "Merge"
+        }, 
+        {
+            "location": "/merge/#to-stdout", 
+            "text": "Given a data1.yaml file of:  a: simple\nb: [1, 2]  and data2.yaml file of:  a: other\nc:\n  test: 1  then  yaml m data1.yaml data2.yaml  will output:  a: simple\nb: [1, 2]\nc:\n  test: 1", 
+            "title": "To Stdout"
+        }, 
+        {
+            "location": "/merge/#updating-files-in-place", 
+            "text": "Given a data1.yaml file of:  a: simple\nb: [1, 2]  and data2.yaml file of:  a: other\nc:\n  test: 1  then  yaml m -i data1.yaml data2.yaml  will update the data1.yaml file so that the value of 'c' is 'test: 1'.", 
+            "title": "Updating files in-place"
+        }, 
+        {
+            "location": "/merge/#overwrite-values", 
+            "text": "Given a data1.yaml file of:  a: simple\nb: [1, 2]  and data2.yaml file of:  a: other\nc:\n  test: 1  then  yaml m -x data1.yaml data2.yaml  will output:  a: other\nb: [1, 2]\nc:\n  test: 1", 
+            "title": "Overwrite values"
+        }, 
+        {
+            "location": "/merge/#overwrite-values-with-arrays", 
+            "text": "Given a data1.yaml file of:  a: simple\nb: [1, 2]  and data3.yaml file of:  b: [2, 3, 4]\nc:\n  test: 2\n  other: true\nd: false  then  yaml m -x data1.yaml data3.yaml  will output:  a: simple\nb: [2, 3, 4]\nc:\n  test: 2\n  other: true\nd: false  Notice that 'b' does not result in the merging of the values within an array. The underlying library does not\ncurrently handle merging values within an array.", 
+            "title": "Overwrite values with arrays"
         }
     ]
 }

docs/read/index.html

@@ -1,17 +1,18 @@
 
 <!DOCTYPE html>
-<html class="no-js">
+<html lang="en" class="no-js">
   <head>
     
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
       
       
       
       
         <link rel="shortcut icon" href="../assets/images/favicon.png">
       
-      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.5.4">
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
     
     
       
@@ -19,10 +20,10 @@
       
     
     
-      <script src="../assets/javascripts/modernizr-56ade86843.js"></script>
+      <script src="../assets/javascripts/modernizr-e826f8942a.js"></script>
     
     
-      <link rel="stylesheet" href="../assets/stylesheets/application-b1a1975878.css">
+      <link rel="stylesheet" href="../assets/stylesheets/application-a20f419c8e.css">
       
     
     
@@ -60,10 +61,11 @@
   <nav class="md-header-nav md-grid">
     <div class="md-flex">
       <div class="md-flex__cell md-flex__cell--shrink">
-        
-          <a href=".." title="Yaml" class="md-icon md-icon--home md-header-nav__button">
-          </a>
-        
+        <a href=".." title="Yaml" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon md-icon--home"></i>
+          
+        </a>
       </div>
       <div class="md-flex__cell md-flex__cell--shrink">
         <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
@@ -82,17 +84,17 @@
         
           <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
           
-<div class="md-search" data-md-component="search">
-  <div class="md-search__overlay"></div>
+<div class="md-search" data-md-component="search" role="dialog">
+  <label class="md-search__overlay" for="search"></label>
   <div class="md-search__inner">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" required placeholder="Search" accesskey="s" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
+      <input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
       <label class="md-icon md-search__icon" for="search"></label>
-      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">close</button>
+      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
-        <div class="md-search-result" data-md-component="result">
+        <div class="md-search-result" data-md-component="result" data-md-lang-search="" data-md-lang-tokenizer="[\s\-]+">
           <div class="md-search-result__meta" data-md-lang-result-none="No matching documents" data-md-lang-result-one="1 matching document" data-md-lang-result-other="# matching documents">
             Type to start searching
           </div>
@@ -104,9 +106,9 @@
 </div>
         
       </div>
-      <div class="md-flex__cell md-flex__cell--shrink">
-        <div class="md-header-nav__source">
-          
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
             
 
 
@@ -126,9 +128,9 @@
     </div>
   </a>
 
-          
+          </div>
         </div>
-      </div>
+      
     </div>
   </nav>
 </header>
@@ -145,9 +147,11 @@
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" data-md-level="0">
   <label class="md-nav__title md-nav__title--site" for="drawer">
-    
-      <i class="md-icon md-icon--home md-nav__button"></i>
-    
+    <div class="md-nav__button md-logo">
+      
+        <i class="md-icon md-icon--home"></i>
+      
+    </div>
     Yaml
   </label>
   
@@ -302,6 +306,18 @@
   </li>
 
     
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
   </ul>
 </nav>
                   </div>
@@ -543,7 +559,9 @@ e.g.: given a sample file of</p>
       
     </div>
     
-      <script src="../assets/javascripts/application-0b7df094bf.js"></script>
+      <script src="../assets/javascripts/application-f3ab9e5ff8.js"></script>
+      
+      
       <script>app.initialize({url:{base:".."}})</script>
       
     

docs/sitemap.xml

@@ -4,7 +4,7 @@
     
     <url>
      <loc>/</loc>
-     <lastmod>2017-05-03</lastmod>
+     <lastmod>2017-09-24</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -12,7 +12,7 @@
     
     <url>
      <loc>/read/</loc>
-     <lastmod>2017-05-03</lastmod>
+     <lastmod>2017-09-24</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -20,7 +20,7 @@
     
     <url>
      <loc>/write/</loc>
-     <lastmod>2017-05-03</lastmod>
+     <lastmod>2017-09-24</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -28,7 +28,7 @@
     
     <url>
      <loc>/create/</loc>
-     <lastmod>2017-05-03</lastmod>
+     <lastmod>2017-09-24</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -36,7 +36,15 @@
     
     <url>
      <loc>/convert/</loc>
-     <lastmod>2017-05-03</lastmod>
+     <lastmod>2017-09-24</lastmod>
+     <changefreq>daily</changefreq>
+    </url>
+    
+
+    
+    <url>
+     <loc>/merge/</loc>
+     <lastmod>2017-09-24</lastmod>
      <changefreq>daily</changefreq>
     </url>
     

docs/write/index.html

@@ -1,17 +1,18 @@
 
 <!DOCTYPE html>
-<html class="no-js">
+<html lang="en" class="no-js">
   <head>
     
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">
+      <meta http-equiv="x-ua-compatible" content="ie=edge">
       
       
       
       
         <link rel="shortcut icon" href="../assets/images/favicon.png">
       
-      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.5.4">
+      <meta name="generator" content="mkdocs-0.16.3, mkdocs-material-1.10.1">
     
     
       
@@ -19,10 +20,10 @@
       
     
     
-      <script src="../assets/javascripts/modernizr-56ade86843.js"></script>
+      <script src="../assets/javascripts/modernizr-e826f8942a.js"></script>
     
     
-      <link rel="stylesheet" href="../assets/stylesheets/application-b1a1975878.css">
+      <link rel="stylesheet" href="../assets/stylesheets/application-a20f419c8e.css">
       
     
     
@@ -60,10 +61,11 @@
   <nav class="md-header-nav md-grid">
     <div class="md-flex">
       <div class="md-flex__cell md-flex__cell--shrink">
-        
-          <a href=".." title="Yaml" class="md-icon md-icon--home md-header-nav__button">
-          </a>
-        
+        <a href=".." title="Yaml" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon md-icon--home"></i>
+          
+        </a>
       </div>
       <div class="md-flex__cell md-flex__cell--shrink">
         <label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
@@ -82,17 +84,17 @@
         
           <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
           
-<div class="md-search" data-md-component="search">
-  <div class="md-search__overlay"></div>
+<div class="md-search" data-md-component="search" role="dialog">
+  <label class="md-search__overlay" for="search"></label>
   <div class="md-search__inner">
     <form class="md-search__form" name="search">
-      <input type="text" class="md-search__input" name="query" required placeholder="Search" accesskey="s" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
+      <input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
       <label class="md-icon md-search__icon" for="search"></label>
-      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">close</button>
+      <button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
-        <div class="md-search-result" data-md-component="result">
+        <div class="md-search-result" data-md-component="result" data-md-lang-search="" data-md-lang-tokenizer="[\s\-]+">
           <div class="md-search-result__meta" data-md-lang-result-none="No matching documents" data-md-lang-result-one="1 matching document" data-md-lang-result-other="# matching documents">
             Type to start searching
           </div>
@@ -104,9 +106,9 @@
 </div>
         
       </div>
-      <div class="md-flex__cell md-flex__cell--shrink">
-        <div class="md-header-nav__source">
-          
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
             
 
 
@@ -126,9 +128,9 @@
     </div>
   </a>
 
-          
+          </div>
         </div>
-      </div>
+      
     </div>
   </nav>
 </header>
@@ -145,9 +147,11 @@
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" data-md-level="0">
   <label class="md-nav__title md-nav__title--site" for="drawer">
-    
-      <i class="md-icon md-icon--home md-nav__button"></i>
-    
+    <div class="md-nav__button md-logo">
+      
+        <i class="md-icon md-icon--home"></i>
+      
+    </div>
     Yaml
   </label>
   
@@ -246,6 +250,13 @@
     Adding new fields
   </a>
   
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#appending-value-to-an-array-field" title="Appending value to an array field" class="md-nav__link">
+    Appending value to an array field
+  </a>
+  
 </li>
       
         <li class="md-nav__item">
@@ -302,6 +313,18 @@
   </li>
 
     
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
   </ul>
 </nav>
                   </div>
@@ -339,6 +362,13 @@
     Adding new fields
   </a>
   
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#appending-value-to-an-array-field" title="Appending value to an array field" class="md-nav__link">
+    Appending value to an array field
+  </a>
+  
 </li>
       
         <li class="md-nav__item">
@@ -420,6 +450,28 @@
     - new thing
 </code></pre>
 
+<h3 id="appending-value-to-an-array-field">Appending value to an array field<a class="headerlink" href="#appending-value-to-an-array-field" title="Permanent link">&para;</a></h3>
+<p>Given a sample.yaml file of:</p>
+<pre><code class="yaml">b:
+  c: 2
+  d:
+    - new thing
+    - foo thing
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yaml w sample.yaml b.d[+] &quot;bar thing&quot;
+</code></pre>
+
+<p>will output:</p>
+<pre><code class="yaml">b:
+  c: cat
+  d:
+    - new thing
+    - foo thing
+    - bar thing
+</code></pre>
+
 <h3 id="updating-files-in-place">Updating files in-place<a class="headerlink" href="#updating-files-in-place" title="Permanent link">&para;</a></h3>
 <p>Given a sample.yaml file of:</p>
 <pre><code class="yaml">b:
@@ -547,7 +599,9 @@ b.e[0].name: Howdy Partner
       
     </div>
     
-      <script src="../assets/javascripts/application-0b7df094bf.js"></script>
+      <script src="../assets/javascripts/application-f3ab9e5ff8.js"></script>
+      
+      
       <script>app.initialize({url:{base:".."}})</script>
       
     

examples/array.yaml

@@ -0,0 +1,9 @@
+---
+- become: true
+  gather_facts: false
+  hosts: lalaland
+  name: "Apply smth"
+  roles:
+    - lala
+    - land
+  serial: 1

examples/data1.yaml

@@ -0,0 +1,2 @@
+a: simple
+b: [1, 2]

examples/data2.yaml

@@ -0,0 +1,3 @@
+a: other
+c:
+  test: 1

examples/data3.yaml

@@ -0,0 +1,5 @@
+b: [2, 3, 4]
+c:
+  test: 2
+  other: true
+d: false

examples/sample_array.yaml

@@ -0,0 +1 @@
+[1,2,3]

examples/sample_text.yaml

@@ -0,0 +1 @@
+hi

json_converter.go

@@ -2,15 +2,18 @@ package main
 
 import (
 	"encoding/json"
-	"gopkg.in/yaml.v2"
+	"fmt"
+	"strconv"
+
+	yaml "gopkg.in/yaml.v2"
 )
 
-func jsonToString(context interface{}) string {
+func jsonToString(context interface{}) (string, error) {
 	out, err := json.Marshal(toJSON(context))
 	if err != nil {
-		die("error printing yaml as json: ", err)
+		return "", fmt.Errorf("error printing yaml as json: %v", err)
 	}
-	return string(out)
+	return string(out), nil
 }
 
 func toJSON(context interface{}) interface{} {
@@ -26,7 +29,13 @@ func toJSON(context interface{}) interface{} {
 		oldMap := context.(yaml.MapSlice)
 		newMap := make(map[string]interface{})
 		for _, entry := range oldMap {
-			newMap[entry.Key.(string)] = toJSON(entry.Value)
+			if str, ok := entry.Key.(string); ok {
+				newMap[str] = toJSON(entry.Value)
+			} else if i, ok := entry.Key.(int); ok {
+				newMap[strconv.Itoa(i)] = toJSON(entry.Value)
+			} else if b, ok := entry.Key.(bool); ok {
+				newMap[strconv.FormatBool(b)] = toJSON(entry.Value)
+			}
 		}
 		return newMap
 	default:

json_converter_test.go

@@ -10,7 +10,28 @@ func TestJsonToString(t *testing.T) {
 b:
   c: 2
 `)
-	assertResult(t, "{\"b\":{\"c\":2}}", jsonToString(data))
+	got, _ := jsonToString(data)
+	assertResult(t, "{\"b\":{\"c\":2}}", got)
+}
+
+func TestJsonToString_withIntKey(t *testing.T) {
+	var data = parseData(`
+---
+b:
+  2: c
+`)
+	got, _ := jsonToString(data)
+	assertResult(t, `{"b":{"2":"c"}}`, got)
+}
+
+func TestJsonToString_withBoolKey(t *testing.T) {
+	var data = parseData(`
+---
+b:
+  false: c
+`)
+	got, _ := jsonToString(data)
+	assertResult(t, `{"b":{"false":"c"}}`, got)
 }
 
 func TestJsonToString_withArray(t *testing.T) {
@@ -20,5 +41,6 @@ b:
   - item: one
   - item: two
 `)
-	assertResult(t, "{\"b\":[{\"item\":\"one\"},{\"item\":\"two\"}]}", jsonToString(data))
+	got, _ := jsonToString(data)
+	assertResult(t, "{\"b\":[{\"item\":\"one\"},{\"item\":\"two\"}]}", got)
 }

merge.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"github.com/imdario/mergo"
+)
+
+func merge(dst, src interface{}, overwrite bool) error {
+	if overwrite {
+		return mergo.MergeWithOverwrite(dst, src)
+	}
+	return mergo.Merge(dst, src)
+}

merge_test.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"testing"
+
+	yaml "gopkg.in/yaml.v2"
+)
+
+func TestMerge(t *testing.T) {
+	result, _ := mergeYaml([]string{"examples/data1.yaml", "examples/data2.yaml", "examples/data3.yaml"})
+	expected := yaml.MapSlice{
+		yaml.MapItem{Key: "a", Value: "simple"},
+		yaml.MapItem{Key: "b", Value: []interface{}{1, 2}},
+		yaml.MapItem{Key: "c", Value: yaml.MapSlice{yaml.MapItem{Key: "other", Value: true}, yaml.MapItem{Key: "test", Value: 1}}},
+		yaml.MapItem{Key: "d", Value: false},
+	}
+	assertResultComplex(t, expected, result)
+}
+
+func TestMergeWithOverwrite(t *testing.T) {
+	overwriteFlag = true
+	result, _ := mergeYaml([]string{"examples/data1.yaml", "examples/data2.yaml", "examples/data3.yaml"})
+	expected := yaml.MapSlice{
+		yaml.MapItem{Key: "a", Value: "other"},
+		yaml.MapItem{Key: "b", Value: []interface{}{2, 3, 4}},
+		yaml.MapItem{Key: "c", Value: yaml.MapSlice{yaml.MapItem{Key: "other", Value: true}, yaml.MapItem{Key: "test", Value: 2}}},
+		yaml.MapItem{Key: "d", Value: false},
+	}
+	assertResultComplex(t, expected, result)
+}

mkdocs.yml

@@ -8,6 +8,7 @@ pages:
     - Write/Update: write.md
     - Create: create.md
     - Convert: convert.md
+    - Merge: merge.md
 repo_name: 'mikefarah/yaml'
 repo_url: 'https://github.com/mikefarah/yaml'
 

mkdocs/merge.md

@@ -0,0 +1,104 @@
+Yaml files can be merged using the 'merge' command. Each additional file merged with the first file will
+set values for any key not existing already or where the key has no value.
+
+```
+yaml m <yaml_file|json_file> <path>...
+```
+{!snippets/works_with_json.md!}
+
+### To Stdout
+Given a data1.yaml file of:
+```yaml
+a: simple
+b: [1, 2]
+```
+and data2.yaml file of:
+```yaml
+a: other
+c:
+  test: 1
+```
+then
+```bash
+yaml m data1.yaml data2.yaml
+```
+will output:
+```yaml
+a: simple
+b: [1, 2]
+c:
+  test: 1
+```
+
+### Updating files in-place
+Given a data1.yaml file of:
+```yaml
+a: simple
+b: [1, 2]
+```
+and data2.yaml file of:
+```yaml
+a: other
+c:
+  test: 1
+```
+then
+```bash
+yaml m -i data1.yaml data2.yaml
+```
+will update the data1.yaml file so that the value of 'c' is 'test: 1'.
+
+### Overwrite values
+Given a data1.yaml file of:
+```yaml
+a: simple
+b: [1, 2]
+```
+and data2.yaml file of:
+```yaml
+a: other
+c:
+  test: 1
+```
+then
+```bash
+yaml m -x data1.yaml data2.yaml
+```
+will output:
+```yaml
+a: other
+b: [1, 2]
+c:
+  test: 1
+```
+
+### Overwrite values with arrays
+Given a data1.yaml file of:
+```yaml
+a: simple
+b: [1, 2]
+```
+and data3.yaml file of:
+```yaml
+b: [2, 3, 4]
+c:
+  test: 2
+  other: true
+d: false
+```
+then
+```bash
+yaml m -x data1.yaml data3.yaml
+```
+will output:
+```yaml
+a: simple
+b: [2, 3, 4]
+c:
+  test: 2
+  other: true
+d: false
+```
+
+Notice that 'b' does not result in the merging of the values within an array. The underlying library does not
+currently handle merging values within an array.

mkdocs/write.md

@@ -44,6 +44,29 @@ b:
     - new thing
 ```
 
+### Appending value to an array field
+Given a sample.yaml file of:
+```yaml
+b:
+  c: 2
+  d:
+    - new thing
+    - foo thing
+```
+then
+```bash
+yaml w sample.yaml b.d[+] "bar thing"
+```
+will output:
+```yaml
+b:
+  c: cat
+  d:
+    - new thing
+    - foo thing
+    - bar thing
+```
+
 ### Updating files in-place
 Given a sample.yaml file of:
 ```yaml

path_parser.go

@@ -16,13 +16,13 @@ func nextYamlPath(path string) (pathElement string, remaining string) {
 	switch path[0] {
 	case '[':
 		// e.g [0].blah.cat -> we need to return "0" and "blah.cat"
-		return search(path[1:len(path)], []uint8{']'}, true)
+		return search(path[1:], []uint8{']'}, true)
 	case '"':
 		// e.g "a.b".blah.cat -> we need to return "a.b" and "blah.cat"
-		return search(path[1:len(path)], []uint8{'"'}, true)
+		return search(path[1:], []uint8{'"'}, true)
 	default:
 		// e.g "a.blah.cat" -> return "a" and "blah.cat"
-		return search(path[0:len(path)], []uint8{'.', '['}, false)
+		return search(path[0:], []uint8{'.', '['}, false)
 	}
 }
 
@@ -39,7 +39,7 @@ func search(path string, matchingChars []uint8, skipNext bool) (pathElement stri
 			if remainingStart > len(path) {
 				remainingStart = len(path)
 			}
-			return path[0:i], path[remainingStart:len(path)]
+			return path[0:i], path[remainingStart:]
 		}
 	}
 	return path, ""

path_parser_test.go

@@ -10,11 +10,12 @@ var parsePathsTests = []struct {
 }{
 	{"a.b", []string{"a", "b"}},
 	{"a.b[0]", []string{"a", "b", "0"}},
+	{"a.b.d[+]", []string{"a", "b", "d", "+"}},
 }
 
-func testParsePath(t *testing.T) {
+func TestParsePath(t *testing.T) {
 	for _, tt := range parsePathsTests {
-		assertResultWithContext(t, tt.expectedPaths, parsePath(tt.path), tt)
+		assertResultComplex(t, tt.expectedPaths, parsePath(tt.path))
 	}
 }
 

precheckin.sh

@@ -1,9 +0,0 @@
-#!/bin/bash
-
-set -e
-
-gofmt -w .
-golint
-./ci.sh
-
-go install

scripts/acceptance.sh

@@ -2,14 +2,10 @@
 
 set -e
 
-go test
-go build
-
 # acceptance test
-X=$(./yaml w sample.yaml b.c 3 | ./yaml r - b.c)
+X=$(./bin/yaml w ./examples/sample.yaml b.c 3 | ./bin/yaml r - b.c)
 
-if [ $X != 3 ]
-  then
+if [[ $X != 3 ]]; then
   echo "Failed acceptance test: expected 2 but was $X"
   exit 1
-fi
+fi

scripts/check.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -o errexit
+set -o pipefail
+
+gometalinter \
+  --skip=examples \
+  --tests \
+  --vendor \
+  --disable=aligncheck \
+  --disable=gotype \
+  --disable=goconst \
+  --cyclo-over=20 \
+  --deadline=300s \
+  ./...
+
+gometalinter \
+  --skip=examples \
+  --tests \
+  --vendor \
+  --disable=aligncheck \
+  --disable=gotype \
+  --disable=goconst \
+  --disable=gocyclo \
+  --deadline=300s \
+  ./...

scripts/coverage.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -e
+
+go test -coverprofile=coverage.out
+go tool cover -html=coverage.out -o cover/coverage.html

scripts/devtools.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+go get -u github.com/alecthomas/gometalinter
+go get -u golang.org/x/tools/cmd/goimports
+go get -u github.com/mitchellh/gox
+go get -u github.com/kardianos/govendor
+go get -u github.com/aktau/github-release
+
+# install all the linters
+gometalinter --install --update

scripts/format.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+find . \( -path ./vendor \) -prune -o -name "*.go" -exec goimports -w {} \;

scripts/publish.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+GITHUB_TOKEN="${GITHUB_TOKEN:?missing required input \'GITHUB_TOKEN\'}"
+
+CURRENT="$(git describe --tags --abbrev=0)"
+PREVIOUS="$(git describe --tags --abbrev=0 --always "${CURRENT}"^)"
+OWNER="mikefarah"
+REPO="yaml"
+
+release() {
+    mapfile -t logs < <(git log --pretty=oneline --abbrev-commit "${PREVIOUS}".."${CURRENT}")
+    description="$(printf '%s\n' "${logs[@]}")"
+    github-release release \
+        --user "$OWNER" \
+        --repo "$REPO" \
+        --tag "$CURRENT" \
+        --description "$description" ||
+            github-release edit \
+                --user "$OWNER" \
+                --repo "$REPO" \
+                --tag "$CURRENT" \
+                --description "$description"
+}
+
+upload() {
+    mapfile -t files < <(find ./build -mindepth 1 -maxdepth 1)
+    for file in "${files[@]}"; do
+        BINARY=$(basename "${file}")
+        echo "--> ${BINARY}"
+        github-release upload \
+            --user "$OWNER" \
+            --repo "$REPO" \
+            --tag "$CURRENT" \
+            --name "${BINARY}" \
+            --file "$file"
+    done
+}
+
+release
+upload

scripts/setup.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+set -eu
+
+find_mgr() {
+    if hash minishift 2>/dev/null; then
+        echo "minishift"
+    else
+        if hash docker-machine 2>/dev/null; then
+            echo "docker-machine"
+        fi
+    fi
+}
+
+get_vm_name() {
+    case "$1" in
+        minishift)
+            echo "minishift"
+            ;;
+        docker-machine)
+            echo "${DOCKER_MACHINE_NAME}"
+            ;;
+        *)
+            ;;
+    esac
+}
+
+is_vm_running() {
+    local vm=$1
+    declare -a running=($(VBoxManage list runningvms | awk '{ print $1 }'))
+    local result='false'
+
+    for rvm in "${running[@]}"; do
+        if [[ "${rvm}" == *"${vm}"* ]]; then
+            result='true'
+        fi
+    done
+    echo "$result"
+}
+
+if hash cygpath 2>/dev/null; then
+    PROJECT_DIR=$(cygpath -w -a "$(pwd)")
+else
+    PROJECT_DIR=$(pwd)
+fi
+
+VM_MGR=$(find_mgr)
+if [[ -z $VM_MGR ]]; then
+    echo "ERROR: No VM Manager found; expected one of ['minishift', 'docker-machine']"
+    exit 1
+fi
+
+VM_NAME=$(get_vm_name "$VM_MGR")
+if [[ -z $VM_NAME ]]; then
+    echo "ERROR: No VM found; try running 'eval $(docker-machine env)'"
+    exit 1
+fi
+
+if ! hash VBoxManage 2>/dev/null; then
+    echo "VirtualBox executable 'VBoxManage' not found in path"
+    exit 1
+fi
+
+avail=$(is_vm_running "$VM_NAME")
+if [[ "$avail" == *"true"* ]]; then
+    res=$(VBoxManage sharedfolder add "${VM_NAME}" --name "${PROJECT}" --hostpath "${PROJECT_DIR}" --transient 2>&1)
+    if [[ -z $res || $res == *"already exists"* ]]; then
+        # no need to show that it already exists
+        :
+    else
+        echo "$res"
+        exit 1
+    fi
+    echo "VM: [${VM_NAME}] -- Added Sharedfolder [${PROJECT}] @Path [${PROJECT_DIR}]"
+else
+    echo "$VM_NAME is not currently running; please start your VM and try again."
+    exit 1
+fi
+
+SSH_CMD="sudo mkdir -p /${PROJECT} ; sudo mount -t vboxsf ${PROJECT} /${PROJECT}"
+case "${VM_MGR}" in
+    minishift)
+        minishift ssh "${SSH_CMD}"
+        echo "VM: [${VM_NAME}] -- Mounted Sharedfolder [${PROJECT}] @VM Path [/${PROJECT}]"
+        ;;
+    docker-machine)
+        docker-machine ssh "${VM_NAME}" "${SSH_CMD}"
+        echo "VM: [${VM_NAME}] -- Mounted Sharedfolder [${PROJECT}] @VM Path [/${PROJECT}]"
+        ;;
+    *)
+        ;;
+esac

scripts/test.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+go test -v $(go list ./... | grep -v -E 'vendor|examples')

scripts/vendor.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+govendor fetch github.com/op/go-logging
+govendor fetch github.com/spf13/cobra
+govendor fetch gopkg.in/yaml.v2
+govendor fetch github.com/imdario/mergo
+govendor sync

scripts/xcompile.sh

@@ -3,6 +3,5 @@
 # This assumes that gonative and gox is installed as per the 'one time setup' instructions
 # at https://github.com/inconshreveable/gonative
 
-rm  build/*
-gox -output="build/{{.Dir}}_{{.OS}}_{{.Arch}}"
+gox -ldflags "${LDFLAGS}" -output="build/{{.Dir}}_{{.OS}}_{{.Arch}}"
 

utils_test.go

@@ -1,17 +1,40 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
-	"gopkg.in/yaml.v2"
+	"io/ioutil"
 	"os"
+	"reflect"
+	"strings"
 	"testing"
+
+	"github.com/spf13/cobra"
+	yaml "gopkg.in/yaml.v2"
 )
 
+type resulter struct {
+	Error   error
+	Output  string
+	Command *cobra.Command
+}
+
+func runCmd(c *cobra.Command, input string) resulter {
+	buf := new(bytes.Buffer)
+	c.SetOutput(buf)
+	c.SetArgs(strings.Split(input, " "))
+
+	err := c.Execute()
+	output := buf.String()
+
+	return resulter{err, output, c}
+}
+
 func parseData(rawData string) yaml.MapSlice {
 	var parsedData yaml.MapSlice
 	err := yaml.Unmarshal([]byte(rawData), &parsedData)
 	if err != nil {
-		fmt.Println("Error parsing yaml: %v", err)
+		fmt.Printf("Error parsing yaml: %v\n", err)
 		os.Exit(1)
 	}
 	return parsedData
@@ -23,6 +46,12 @@ func assertResult(t *testing.T, expectedValue interface{}, actualValue interface
 	}
 }
 
+func assertResultComplex(t *testing.T, expectedValue interface{}, actualValue interface{}) {
+	if !reflect.DeepEqual(expectedValue, actualValue) {
+		t.Error("Expected <", expectedValue, "> but got <", actualValue, ">", fmt.Sprintf("%T", actualValue))
+	}
+}
+
 func assertResultWithContext(t *testing.T, expectedValue interface{}, actualValue interface{}, context interface{}) {
 
 	if expectedValue != actualValue {
@@ -30,3 +59,22 @@ func assertResultWithContext(t *testing.T, expectedValue interface{}, actualValu
 		t.Error(": expected <", expectedValue, "> but got <", actualValue, ">")
 	}
 }
+
+func writeTempYamlFile(content string) string {
+	tmpfile, _ := ioutil.TempFile("", "testyaml")
+	defer func() {
+		_ = tmpfile.Close()
+	}()
+
+	_, _ = tmpfile.Write([]byte(content))
+	return tmpfile.Name()
+}
+
+func readTempYamlFile(name string) string {
+	content, _ := ioutil.ReadFile(name)
+	return string(content)
+}
+
+func removeTempYamlFile(name string) {
+	_ = os.Remove(name)
+}

vendor/vendor.json

@@ -0,0 +1,43 @@
+{
+	"comment": "",
+	"ignore": "test",
+	"package": [
+		{
+			"checksumSHA1": "66lykxpWgSmQodnhkADqn6tnroQ=",
+			"path": "github.com/imdario/mergo",
+			"revision": "e3000cb3d28c72b837601cac94debd91032d19fe",
+			"revisionTime": "2017-06-20T10:47:01Z"
+		},
+		{
+			"checksumSHA1": "40vJyUB4ezQSn/NSadsKEOrudMc=",
+			"path": "github.com/inconshreveable/mousetrap",
+			"revision": "76626ae9c91c4f2a10f34cad8ce83ea42c93bb75",
+			"revisionTime": "2014-10-17T20:07:13Z"
+		},
+		{
+			"checksumSHA1": "BoXdUBWB8UnSlFlbnuTQaPqfCGk=",
+			"path": "github.com/op/go-logging",
+			"revision": "970db520ece77730c7e4724c61121037378659d9",
+			"revisionTime": "2016-03-15T20:05:05Z"
+		},
+		{
+			"checksumSHA1": "xPKgXygsORkmXnLdtFaFmipYKaA=",
+			"path": "github.com/spf13/cobra",
+			"revision": "b78744579491c1ceeaaa3b40205e56b0591b93a3",
+			"revisionTime": "2017-09-05T17:20:51Z"
+		},
+		{
+			"checksumSHA1": "Q52Y7t0lEtk/wcDn5q7tS7B+jqs=",
+			"path": "github.com/spf13/pflag",
+			"revision": "7aff26db30c1be810f9de5038ec5ef96ac41fd7c",
+			"revisionTime": "2017-08-24T17:57:12Z"
+		},
+		{
+			"checksumSHA1": "RDJpJQwkF012L6m/2BJizyOksNw=",
+			"path": "gopkg.in/yaml.v2",
+			"revision": "eb3733d160e74a9c7e442f435eb3bea458e1d19f",
+			"revisionTime": "2017-08-12T16:00:11Z"
+		}
+	],
+	"rootPath": "github.com/mikefarah/yaml"
+}

version.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+// The git commit that was compiled. This will be filled in by the compiler.
+var (
+	GitCommit   string
+	GitDescribe string
+
+	// Version is main version number that is being run at the moment.
+	Version = "1.13.1"
+
+	// VersionPrerelease is a pre-release marker for the version. If this is "" (empty string)
+	// then it means that it is a final release. Otherwise, this is a pre-release
+	// such as "dev" (in development), "beta", "rc1", etc.
+	VersionPrerelease = ""
+)
+
+// ProductName is the name of the product
+const ProductName = "yaml"
+
+// GetVersionDisplay composes the parts of the version in a way that's suitable
+// for displaying to humans.
+func GetVersionDisplay() string {
+	return fmt.Sprintf("%s version %s\n", ProductName, getHumanVersion())
+}
+
+func getHumanVersion() string {
+	version := Version
+	if GitDescribe != "" {
+		version = GitDescribe
+	}
+
+	release := VersionPrerelease
+	if GitDescribe == "" && release == "" {
+		release = "dev"
+	}
+	if release != "" {
+		if !strings.Contains(version, release) {
+			version += fmt.Sprintf("-%s", release)
+		}
+		if GitCommit != "" {
+			version += fmt.Sprintf(" (%s)", GitCommit)
+		}
+	}
+
+	// Strip off any single quotes added by the git information.
+	return strings.Replace(version, "'", "", -1)
+}

version_test.go

@@ -0,0 +1,46 @@
+package main
+
+import "testing"
+
+func TestGetVersionDisplay(t *testing.T) {
+	tests := []struct {
+		name string
+		want string
+	}{
+		{
+			name: "Display Version",
+			want: ProductName + " version " + Version + "-dev\n",
+		},
+	}
+	for _, tt := range tests {
+		if got := GetVersionDisplay(); got != tt.want {
+			t.Errorf("%q. GetVersionDisplay() = %v, want %v", tt.name, got, tt.want)
+		}
+	}
+}
+
+func Test_getHumanVersion(t *testing.T) {
+	GitDescribe = "e42813d"
+	GitCommit = "e42813d+CHANGES"
+	var wanted string
+	if VersionPrerelease == "" {
+		wanted = GitDescribe
+	} else {
+		wanted = "e42813d-" + VersionPrerelease + " (e42813d+CHANGES)"
+	}
+
+	tests := []struct {
+		name string
+		want string
+	}{
+		{
+			name: "Git Variables defined",
+			want: wanted,
+		},
+	}
+	for _, tt := range tests {
+		if got := getHumanVersion(); got != tt.want {
+			t.Errorf("%q. getHumanVersion() = %v, want %v", tt.name, got, tt.want)
+		}
+	}
+}

yaml.go

@@ -1,43 +1,73 @@
 package main
 
 import (
+	"errors"
 	"fmt"
-	"github.com/op/go-logging"
-	"github.com/spf13/cobra"
-	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"os"
 	"strconv"
 	"strings"
+
+	logging "github.com/op/go-logging"
+	"github.com/spf13/cobra"
+	yaml "gopkg.in/yaml.v2"
 )
 
 var trimOutput = true
 var writeInplace = false
 var writeScript = ""
-var inputJSON = false
 var outputToJSON = false
+var overwriteFlag = false
 var verbose = false
+var version = false
 var log = logging.MustGetLogger("yaml")
-var format = logging.MustStringFormatter(
-	`%{color}%{time:15:04:05} %{shortfunc} [%{level:.4s}]%{color:reset} %{message}`,
-)
-var backend = logging.AddModuleLevel(
-	logging.NewBackendFormatter(logging.NewLogBackend(os.Stderr, "", 0), format))
 
 func main() {
-	backend.SetLevel(logging.ERROR, "")
-	logging.SetBackend(backend)
+	cmd := newCommandCLI()
+	if err := cmd.Execute(); err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+}
 
-	var cmdRead = createReadCmd()
-	var cmdWrite = createWriteCmd()
-	var cmdNew = createNewCmd()
+func newCommandCLI() *cobra.Command {
+	var rootCmd = &cobra.Command{
+		Use: "yaml",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if version {
+				cmd.Print(GetVersionDisplay())
+				return nil
+			}
+			cmd.Println(cmd.UsageString())
+
+			return nil
+		},
+		PersistentPreRun: func(cmd *cobra.Command, args []string) {
+			var format = logging.MustStringFormatter(
+				`%{color}%{time:15:04:05} %{shortfunc} [%{level:.4s}]%{color:reset} %{message}`,
+			)
+			var backend = logging.AddModuleLevel(
+				logging.NewBackendFormatter(logging.NewLogBackend(os.Stderr, "", 0), format))
+
+			if verbose {
+				backend.SetLevel(logging.DEBUG, "")
+			} else {
+				backend.SetLevel(logging.ERROR, "")
+			}
+
+			logging.SetBackend(backend)
+		},
+	}
 
-	var rootCmd = &cobra.Command{Use: "yaml"}
 	rootCmd.PersistentFlags().BoolVarP(&trimOutput, "trim", "t", true, "trim yaml output")
 	rootCmd.PersistentFlags().BoolVarP(&outputToJSON, "tojson", "j", false, "output as json")
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose mode")
-	rootCmd.AddCommand(cmdRead, cmdWrite, cmdNew)
-	rootCmd.Execute()
+	rootCmd.Flags().BoolVarP(&version, "version", "V", false, "Print version information and quit")
+
+	rootCmd.AddCommand(createReadCmd(), createWriteCmd(), createNewCmd(), createMergeCmd())
+	rootCmd.SetOutput(os.Stdout)
+
+	return rootCmd
 }
 
 func createReadCmd() *cobra.Command {
@@ -53,7 +83,7 @@ yaml r things.yaml a.array[0].blah
 yaml r things.yaml a.array[*].blah
       `,
 		Long: "Outputs the value of the given path in the yaml file to STDOUT",
-		Run:  readProperty,
+		RunE: readProperty,
 	}
 }
 
@@ -68,10 +98,14 @@ yaml write --inplace things.yaml a.b.c cat
 yaml w -i things.yaml a.b.c cat
 yaml w --script update_script.yaml things.yaml
 yaml w -i -s update_script.yaml things.yaml
+yaml w things.yaml a.b.d[+] foo
+yaml w things.yaml a.b.d[+] foo
       `,
 		Long: `Updates the yaml file w.r.t the given path and value.
 Outputs to STDOUT unless the inplace flag is used, in which case the file is updated instead.
 
+Append value to array adds the value to the end of array.
+
 Update Scripts:
 Note that you can give an update script to perform more sophisticated updated. Update script
 format is a yaml map where the key is the path and the value is..well the value. e.g.:
@@ -80,7 +114,7 @@ a.b.c: true,
 a.b.e:
   - name: bob
 `,
-		Run: writeProperty,
+		RunE: writeProperty,
 	}
 	cmdWrite.PersistentFlags().BoolVarP(&writeInplace, "inplace", "i", false, "update the yaml file inplace")
 	cmdWrite.PersistentFlags().StringVarP(&writeScript, "script", "s", "", "yaml script for updating yaml")
@@ -103,94 +137,256 @@ Outputs to STDOUT
 Create Scripts:
 Note that you can give a create script to perform more sophisticated yaml. This follows the same format as the update script.
 `,
-		Run: newProperty,
+		RunE: newProperty,
 	}
 	cmdNew.PersistentFlags().StringVarP(&writeScript, "script", "s", "", "yaml script for updating yaml")
 	return cmdNew
 }
 
-func readProperty(cmd *cobra.Command, args []string) {
-	if verbose {
-		backend.SetLevel(logging.DEBUG, "")
+func createMergeCmd() *cobra.Command {
+	var cmdMerge = &cobra.Command{
+		Use:     "merge [initial_yaml_file] [additional_yaml_file]...",
+		Aliases: []string{"m"},
+		Short:   "yaml m [--inplace/-i] [--overwrite/-x] sample.yaml sample2.yaml",
+		Example: `
+yaml merge things.yaml other.yaml
+yaml merge --inplace things.yaml other.yaml
+yaml m -i things.yaml other.yaml
+yaml m --overwrite things.yaml other.yaml
+yaml m -i -x things.yaml other.yaml
+      `,
+		Long: `Updates the yaml file by adding/updating the path(s) and value(s) from additional yaml file(s).
+Outputs to STDOUT unless the inplace flag is used, in which case the file is updated instead.
+
+If overwrite flag is set then existing values will be overwritten using the values from each additional yaml file.
+`,
+		RunE: mergeProperties,
 	}
-	print(read(args))
+	cmdMerge.PersistentFlags().BoolVarP(&writeInplace, "inplace", "i", false, "update the yaml file inplace")
+	cmdMerge.PersistentFlags().BoolVarP(&overwriteFlag, "overwrite", "x", false, "update the yaml file by overwriting existing values")
+	return cmdMerge
 }
 
-func read(args []string) interface{} {
+func readProperty(cmd *cobra.Command, args []string) error {
+	data, err := read(args)
+	if err != nil {
+		return err
+	}
+	dataStr, err := toString(data)
+	if err != nil {
+		return err
+	}
+	cmd.Println(dataStr)
+	return nil
+}
+
+func read(args []string) (interface{}, error) {
 	var parsedData yaml.MapSlice
+	var path = ""
 
-	readData(args[0], &parsedData, inputJSON)
-
-	if len(args) == 1 {
-		return parsedData
+	if len(args) < 1 {
+		return nil, errors.New("Must provide filename")
+	} else if len(args) > 1 {
+		path = args[1]
 	}
 
-	var paths = parsePath(args[1])
-
-	return readMap(parsedData, paths[0], paths[1:len(paths)])
-}
-
-func newProperty(cmd *cobra.Command, args []string) {
-	if verbose {
-		backend.SetLevel(logging.DEBUG, "")
+	if err := readData(args[0], &parsedData); err != nil {
+		var generalData interface{}
+		if err = readData(args[0], &generalData); err != nil {
+			return nil, err
+		}
+		item := yaml.MapItem{Key: "thing", Value: generalData}
+		parsedData = yaml.MapSlice{item}
+		path = "thing." + path
 	}
-	updatedData := newYaml(args)
-	print(updatedData)
+
+	if parsedData != nil && parsedData[0].Key == nil {
+		var interfaceData []map[interface{}]interface{}
+		if err := readData(args[0], &interfaceData); err == nil {
+			var listMap []yaml.MapSlice
+			for _, item := range interfaceData {
+				listMap = append(listMap, mapToMapSlice(item))
+			}
+			return readYamlArray(listMap, path)
+		}
+	}
+
+	if path == "" {
+		return parsedData, nil
+	}
+
+	var paths = parsePath(path)
+
+	return readMap(parsedData, paths[0], paths[1:])
 }
 
-func newYaml(args []string) interface{} {
+func readYamlArray(listMap []yaml.MapSlice, path string) (interface{}, error) {
+	if path == "" {
+		return listMap, nil
+	}
+
+	var paths = parsePath(path)
+
+	if paths[0] == "*" {
+		if len(paths[1:]) == 0 {
+			return listMap, nil
+		}
+		var results []interface{}
+		for _, m := range listMap {
+			value, err := readMap(m, paths[1], paths[2:])
+			if err != nil {
+				return nil, err
+			}
+			results = append(results, value)
+		}
+		return results, nil
+	}
+
+	index, err := strconv.ParseInt(paths[0], 10, 64)
+	if err != nil {
+		return nil, fmt.Errorf("Error accessing array: %v", err)
+	}
+	if len(paths[1:]) == 0 {
+		return listMap[index], nil
+	}
+	return readMap(listMap[index], paths[1], paths[2:])
+}
+
+func newProperty(cmd *cobra.Command, args []string) error {
+	updatedData, err := newYaml(args)
+	if err != nil {
+		return err
+	}
+	dataStr, err := toString(updatedData)
+	if err != nil {
+		return err
+	}
+	cmd.Println(dataStr)
+	return nil
+}
+
+func newYaml(args []string) (interface{}, error) {
 	var writeCommands yaml.MapSlice
 	if writeScript != "" {
-		readData(writeScript, &writeCommands, false)
+		if err := readData(writeScript, &writeCommands); err != nil {
+			return nil, err
+		}
 	} else if len(args) < 2 {
-		die("Must provide <path_to_update> <value>")
+		return nil, errors.New("Must provide <path_to_update> <value>")
 	} else {
 		writeCommands = make(yaml.MapSlice, 1)
 		writeCommands[0] = yaml.MapItem{Key: args[0], Value: parseValue(args[1])}
 	}
 
-	parsedData := make(yaml.MapSlice, 0)
-
-	return updateParsedData(parsedData, writeCommands)
-}
-
-func writeProperty(cmd *cobra.Command, args []string) {
-	if verbose {
-		backend.SetLevel(logging.DEBUG, "")
-	}
-	updatedData := updateYaml(args)
-	if writeInplace {
-		ioutil.WriteFile(args[0], []byte(yamlToString(updatedData)), 0644)
+	var parsedData yaml.MapSlice
+	var prependCommand = ""
+	var isArray = strings.HasPrefix(writeCommands[0].Key.(string), "[")
+	if isArray {
+		item := yaml.MapItem{Key: "thing", Value: make(yaml.MapSlice, 0)}
+		parsedData = yaml.MapSlice{item}
+		prependCommand = "thing"
 	} else {
-		print(updatedData)
+		parsedData = make(yaml.MapSlice, 0)
 	}
+
+	return updateParsedData(parsedData, writeCommands, prependCommand)
 }
 
-func updateParsedData(parsedData yaml.MapSlice, writeCommands yaml.MapSlice) yaml.MapSlice {
+func writeProperty(cmd *cobra.Command, args []string) error {
+	updatedData, err := updateYaml(args)
+	if err != nil {
+		return err
+	}
+	return write(cmd, args[0], updatedData)
+}
+
+func write(cmd *cobra.Command, filename string, updatedData interface{}) error {
+	if writeInplace {
+		dataStr, err := yamlToString(updatedData)
+		if err != nil {
+			return err
+		}
+		return ioutil.WriteFile(filename, []byte(dataStr), 0644)
+	}
+	dataStr, err := toString(updatedData)
+	if err != nil {
+		return err
+	}
+	cmd.Println(dataStr)
+	return nil
+}
+
+func mergeProperties(cmd *cobra.Command, args []string) error {
+	if len(args) < 2 {
+		return errors.New("Must provide at least 2 yaml files")
+	}
+
+	updatedData, err := mergeYaml(args)
+	if err != nil {
+		return err
+	}
+	return write(cmd, args[0], updatedData)
+}
+
+func mergeYaml(args []string) (interface{}, error) {
+	var updatedData map[interface{}]interface{}
+
+	for _, f := range args {
+		var parsedData map[interface{}]interface{}
+		if err := readData(f, &parsedData); err != nil {
+			return nil, err
+		}
+		if err := merge(&updatedData, parsedData, overwriteFlag); err != nil {
+			return nil, err
+		}
+	}
+
+	return mapToMapSlice(updatedData), nil
+}
+
+func updateParsedData(parsedData yaml.MapSlice, writeCommands yaml.MapSlice, prependCommand string) (interface{}, error) {
+	var prefix = ""
+	if prependCommand != "" {
+		prefix = prependCommand + "."
+	}
 	for _, entry := range writeCommands {
-		path := entry.Key
+		path := prefix + entry.Key.(string)
 		value := entry.Value
-		var paths = parsePath(path.(string))
+		var paths = parsePath(path)
 		parsedData = writeMap(parsedData, paths, value)
 	}
-	return parsedData
+	if prependCommand != "" {
+		return readMap(parsedData, prependCommand, make([]string, 0))
+	}
+	return parsedData, nil
 }
 
-func updateYaml(args []string) interface{} {
+func updateYaml(args []string) (interface{}, error) {
 	var writeCommands yaml.MapSlice
+	var prependCommand = ""
 	if writeScript != "" {
-		readData(writeScript, &writeCommands, false)
+		if err := readData(writeScript, &writeCommands); err != nil {
+			return nil, err
+		}
 	} else if len(args) < 3 {
-		die("Must provide <filename> <path_to_update> <value>")
+		return nil, errors.New("Must provide <filename> <path_to_update> <value>")
 	} else {
 		writeCommands = make(yaml.MapSlice, 1)
 		writeCommands[0] = yaml.MapItem{Key: args[1], Value: parseValue(args[2])}
 	}
 
 	var parsedData yaml.MapSlice
-	readData(args[0], &parsedData, inputJSON)
+	if err := readData(args[0], &parsedData); err != nil {
+		var generalData interface{}
+		if err = readData(args[0], &generalData); err != nil {
+			return nil, err
+		}
+		item := yaml.MapItem{Key: "thing", Value: generalData}
+		parsedData = yaml.MapSlice{item}
+		prependCommand = "thing"
+	}
 
-	return updateParsedData(parsedData, writeCommands)
+	return updateParsedData(parsedData, writeCommands, prependCommand)
 }
 
 func parseValue(argument string) interface{} {
@@ -205,70 +401,51 @@ func parseValue(argument string) interface{} {
 		if err == nil {
 			return value
 		}
+		if argument == "[]" {
+			return make([]interface{}, 0)
+		}
 		return argument
 	}
 	return argument[1 : len(argument)-1]
 }
 
-func print(context interface{}) {
-	var out string
+func toString(context interface{}) (string, error) {
 	if outputToJSON {
-		out = jsonToString(context)
-	} else {
-		out = yamlToString(context)
+		return jsonToString(context)
 	}
-	fmt.Println(out)
+	return yamlToString(context)
 }
 
-func yamlToString(context interface{}) string {
+func yamlToString(context interface{}) (string, error) {
 	out, err := yaml.Marshal(context)
 	if err != nil {
-		die("error printing yaml: %v", err)
+		return "", fmt.Errorf("error printing yaml: %v", err)
 	}
 	outStr := string(out)
 	// trim the trailing new line as it's easier for a script to add
 	// it in if required than to remove it
 	if trimOutput {
-		return strings.Trim(outStr, "\n ")
+		return strings.Trim(outStr, "\n "), nil
 	}
-	return outStr
+	return outStr, nil
 }
 
-func readData(filename string, parsedData interface{}, readAsJSON bool) {
+func readData(filename string, parsedData interface{}) error {
 	if filename == "" {
-		die("Must provide filename")
+		return errors.New("Must provide filename")
 	}
 
 	var rawData []byte
+	var err error
 	if filename == "-" {
-		rawData = readStdin()
+		rawData, err = ioutil.ReadAll(os.Stdin)
 	} else {
-		rawData = readFile(filename)
+		rawData, err = ioutil.ReadFile(filename)
 	}
 
-	err := yaml.Unmarshal([]byte(rawData), parsedData)
 	if err != nil {
-		die("error parsing data: ", err)
+		return err
 	}
-}
 
-func readStdin() []byte {
-	bytes, err := ioutil.ReadAll(os.Stdin)
-	if err != nil {
-		die("error reading stdin", err)
-	}
-	return bytes
-}
-
-func readFile(filename string) []byte {
-	var rawData, readError = ioutil.ReadFile(filename)
-	if readError != nil {
-		die("error: %v", readError)
-	}
-	return rawData
-}
-
-func die(message ...interface{}) {
-	fmt.Println(message)
-	os.Exit(1)
+	return yaml.Unmarshal(rawData, parsedData)
 }

yaml_test.go

@@ -24,13 +24,23 @@ func TestParseValue(t *testing.T) {
 }
 
 func TestRead(t *testing.T) {
-	result := read([]string{"sample.yaml", "b.c"})
+	result, _ := read([]string{"examples/sample.yaml", "b.c"})
 	assertResult(t, 2, result)
 }
 
+func TestReadArray(t *testing.T) {
+	result, _ := read([]string{"examples/sample_array.yaml", "[1]"})
+	assertResult(t, 2, result)
+}
+
+func TestReadString(t *testing.T) {
+	result, _ := read([]string{"examples/sample_text.yaml"})
+	assertResult(t, "hi", result)
+}
+
 func TestOrder(t *testing.T) {
-	result := read([]string{"order.yaml"})
-	formattedResult := yamlToString(result)
+	result, _ := read([]string{"examples/order.yaml"})
+	formattedResult, _ := yamlToString(result)
 	assertResult(t,
 		`version: 3
 application: MyApp`,
@@ -38,33 +48,69 @@ application: MyApp`,
 }
 
 func TestNewYaml(t *testing.T) {
-	result := newYaml([]string{"b.c", "3"})
+	result, _ := newYaml([]string{"b.c", "3"})
 	formattedResult := fmt.Sprintf("%v", result)
 	assertResult(t,
 		"[{b [{c 3}]}]",
 		formattedResult)
 }
 
+func TestNewYamlArray(t *testing.T) {
+	result, _ := newYaml([]string{"[0].cat", "meow"})
+	formattedResult := fmt.Sprintf("%v", result)
+	assertResult(t,
+		"[[{cat meow}]]",
+		formattedResult)
+}
+
 func TestUpdateYaml(t *testing.T) {
-	result := updateYaml([]string{"sample.yaml", "b.c", "3"})
+	result, _ := updateYaml([]string{"examples/sample.yaml", "b.c", "3"})
 	formattedResult := fmt.Sprintf("%v", result)
 	assertResult(t,
 		"[{a Easy! as one two three} {b [{c 3} {d [3 4]} {e [[{name fred} {value 3}] [{name sam} {value 4}]]}]}]",
 		formattedResult)
 }
 
+func TestUpdateYamlArray(t *testing.T) {
+	result, _ := updateYaml([]string{"examples/sample_array.yaml", "[0]", "3"})
+	formattedResult := fmt.Sprintf("%v", result)
+	assertResult(t,
+		"[3 2 3]",
+		formattedResult)
+}
+
 func TestUpdateYaml_WithScript(t *testing.T) {
-	writeScript = "instruction_sample.yaml"
-	updateYaml([]string{"sample.yaml"})
+	writeScript = "examples/instruction_sample.yaml"
+	_, _ = updateYaml([]string{"examples/sample.yaml"})
+}
+
+func TestUpdateYaml_WithUnknownScript(t *testing.T) {
+	writeScript = "fake-unknown"
+	_, err := updateYaml([]string{"examples/sample.yaml"})
+	if err == nil {
+		t.Error("Expected error due to unknown file")
+	}
+	expectedOutput := `open fake-unknown: no such file or directory`
+	assertResult(t, expectedOutput, err.Error())
 }
 
 func TestNewYaml_WithScript(t *testing.T) {
-	writeScript = "instruction_sample.yaml"
+	writeScript = "examples/instruction_sample.yaml"
 	expectedResult := `b:
   c: cat
   e:
   - name: Mike Farah`
-	result := newYaml([]string{""})
-	actualResult := yamlToString(result)
+	result, _ := newYaml([]string{""})
+	actualResult, _ := yamlToString(result)
 	assertResult(t, expectedResult, actualResult)
 }
+
+func TestNewYaml_WithUnknownScript(t *testing.T) {
+	writeScript = "fake-unknown"
+	_, err := newYaml([]string{""})
+	if err == nil {
+		t.Error("Expected error due to unknown file")
+	}
+	expectedOutput := `open fake-unknown: no such file or directory`
+	assertResult(t, expectedOutput, err.Error())
+}