Merge branch 'v4'

Increment version
Updating readme for imminent v4 release
2025-01-18 04:53:17 -08:00 · 2020-12-20 13:31:23 +11:00 · 2020-12-20 13:29:12 +11:00 · 2020-12-20 12:39:42 +11:00 · 2020-12-20 12:37:15 +11:00 · 2020-12-17 14:19:46 +11:00
35 changed files with 776 additions and 222 deletions
--- a/.github/ISSUE_TEMPLATE/bug_report_v3.md
+++ b/.github/ISSUE_TEMPLATE/bug_report_v3.md
@@ -1,8 +1,8 @@
 ---
-name: Bug report
+name: Bug report - V3
 about: Create a report to help us improve
 title: ''
-labels: bug
+labels: bug, v3
 assignees: ''

 ---
@@ -10,11 +10,12 @@ assignees: ''
 **Describe the bug**
 A clear and concise description of what the bug is.

-version of yq: 
-operating system:
+Version of yq: 3.X.X
+Operating system: mac/linux/windows/....
+Installed via: docker/binary release/homebrew/snap/...

 **Input Yaml**
-Concise yaml document(s) (as simple as possible to show the bug)
+Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less)
 data1.yml:
 ```yaml
 this: should really work
--- a/.github/ISSUE_TEMPLATE/bug_report_v4.md
+++ b/.github/ISSUE_TEMPLATE/bug_report_v4.md
@@ -0,0 +1,49 @@
+---
+name: Bug report - V4
+about: Create a report to help us improve
+title: ''
+labels: bug, v4
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+Version of yq: 4.X.X
+Operating system: mac/linux/windows/....
+Installed via: docker/binary release/homebrew/snap/...
+
+**Input Yaml**
+Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less)
+data1.yml:
+```yaml
+this: should really work
+```
+
+data2.yml:
+```yaml
+but: it strangely didn't
+```
+
+**Command**
+The command you ran:
+```
+yq eval-all 'select(fileIndex==0) | .a.b.c' data1.yml data2.yml
+```
+
+**Actual behavior**
+
+```yaml
+cat: meow
+```
+
+**Expected behavior**
+
+```yaml
+this: should really work
+but: it strangely didn't
+```
+
+**Additional context**
+Add any other context about the problem here.
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -1,17 +1,21 @@
 ---
-name: Feature request
+name: Feature request - V4
 about: Suggest an idea for this project
 title: ''
-labels: enhancement
+labels: enhancement, v4
 assignees: ''

 ---

-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+**Please describe your feature request.**
+A clear and concise description of what the request is and what it would solve. 
+Ex. I wish I could use yq to [...]
+
+Please note that V3 will no longer have any enhancements.

 **Describe the solution you'd like**
 If we have data1.yml like:
+(please keep to around 10 lines )

 ```yaml
 country: Australia
@@ -20,7 +24,7 @@ country: Australia
 And we run a command:

 ```bash
-yq predictWeather data1.yml
+yq eval 'predictWeatherOf(.country)'
 ```

 it could output
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -28,7 +28,4 @@ jobs:
      run: |
        export PATH=${PATH}:`go env GOPATH`/bin
        scripts/devtools.sh
-    - name: Build
-      run: |
-        export PATH=${PATH}:`go env GOPATH`/bin
        make local build
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -0,0 +1,48 @@
+name: Publish image to Dockerhub
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  build:
+    env:
+      IMAGE_NAME: mikefarah/yq
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get latest release tag      
+        uses: oprypin/find-latest-tag@v1
+        with:
+          repository: mikefarah/yq  # The repository to scan.
+          releases-only: true  # We know that all relevant tags have a GitHub release for them.
+        id: yq  
+        
+      - name: Clone source code
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ steps.yq.outputs.tag }}
+      
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+  
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          version: latest
+
+      - name: Available platforms
+        run: echo ${{ steps.buildx.outputs.platforms }} && docker version
+ 
+      - name: Build and push image
+        run: |
+          IMAGE_VERSION="$(git describe --tags --abbrev=0)"
+          SHORT_SHA1=$(git rev-parse --short HEAD)
+          PLATFORMS="linux/amd64,linux/ppc64le,linux/arm64"
+          echo "Building and pushing version ${IMAGE_VERSION} of image ${IMAGE_NAME}"
+          echo ${{ secrets.DOCKER_PASSWORD }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
+          docker buildx build --platform "${PLATFORMS}" -t "${IMAGE_NAME}:${IMAGE_VERSION}"  -t "${IMAGE_NAME}:latest" \
+            --push .
+    
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ The aim of the project is to be the [jq](https://github.com/stedolan/jq) or sed
 ### [Download the latest binary](https://github.com/mikefarah/yq/releases/latest)

 ### MacOS:
+Using [Homebrew](https://brew.sh/)
 ```
 brew install yq
 ```
@@ -25,16 +26,16 @@ snap install yq
 `yq` installs with [_strict confinement_](https://docs.snapcraft.io/snap-confinement/6233) in snap, this means it doesn't have direct access to root files. To read root files you can:

 ```
-sudo cat /etc/myfile | yq r - a.path
+sudo cat /etc/myfile | yq e '.a.path' - 
 ```

 And to write to a root file you can either use [sponge](https://linux.die.net/man/1/sponge):
 ```
-sudo cat /etc/myfile | yq w - a.path value | sudo sponge /etc/myfile
+sudo cat /etc/myfile | yq e '.a.path = "value"' - | sudo sponge /etc/myfile
 ```
 or write to a temporary file:
 ```
-sudo cat /etc/myfile | yq w - a.path value | sudo tee /etc/myfile.tmp
+sudo cat /etc/myfile | yq e '.a.path = "value"' | sudo tee /etc/myfile.tmp
 sudo mv /etc/myfile.tmp /etc/myfile
 rm /etc/myfile.tmp
 ```
@@ -44,19 +45,18 @@ rm /etc/myfile.tmp
 Use wget to download the pre-compiled binaries:

 ```bash
-wget https://github.com/mikefarah/yq/releases/download/{VERSION}/{BINARY} -O /usr/bin/yq &&\
+wget https://github.com/mikefarah/yq/releases/download/${VERSION}/${BINARY} -O /usr/bin/yq &&\
    chmod +x /usr/bin/yq
 ```

-For instance, VERSION=3.4.0 and BINARY=yq_linux_amd64
-
+For instance, VERSION=4.0.0 and BINARY=yq_linux_amd64

 ### Run with Docker

 #### Oneshot use:

 ```bash
-docker run --rm -v "${PWD}":/workdir mikefarah/yq yq [flags] <command> FILE...
+docker run --rm -v "${PWD}":/workdir mikefarah/yq <command> [flags] [expression ]FILE...
 ```

 #### Run commands interactively:
@@ -69,13 +69,13 @@ It can be useful to have a bash function to avoid typing the whole docker comman

 ```bash
 yq() {
-  docker run --rm -i -v "${PWD}":/workdir mikefarah/yq yq "$@"
+  docker run --rm -i -v "${PWD}":/workdir mikefarah/yq "$@"
 }
 ```

 ### Go Get:
 ```
-GO111MODULE=on go get github.com/mikefarah/yq/v3
+GO111MODULE=on go get github.com/mikefarah/yq/v4
 ```

 ## Community Supported Installation methods
@@ -88,6 +88,14 @@ choco install yq
 ```
 Supported by @chillum (https://chocolatey.org/packages/yq)

+### Mac:
+Using [MacPorts](https://www.macports.org/)
+```
+sudo port selfupdate
+sudo port install yq
+```
+Supported by @herbygillot (https://ports.macports.org/maintainer/github/herbygillot)
+
 ### Alpine Linux
 - Enable edge/community repo by adding ```$MIRROR/alpine/edge/community``` to ```/etc/apk/repositories```
 - Update database index with ```apk update```
@@ -108,22 +116,18 @@ Supported by @rmescandon (https://launchpad.net/~rmescandon/+archive/ubuntu/yq)

 ## Features
 - Written in portable go, so you can download a lovely dependency free binary
- [Colorize the output](https://mikefarah.gitbook.io/yq/usage/output-format#colorize-output)
- [Deep read a yaml file with a given path expression](https://mikefarah.gitbook.io/yq/commands/read#basic)
- [List matching paths of a given path expression](https://mikefarah.gitbook.io/yq/commands/read#path-only)
- [Return the lengths of arrays/object/scalars](https://mikefarah.gitbook.io/yq/commands/read#printing-length-of-the-results)
- Update a yaml file given a [path expression](https://mikefarah.gitbook.io/yq/commands/write-update#basic) or [script file](https://mikefarah.gitbook.io/yq/commands/write-update#basic)
- Update creates any missing entries in the path on the fly
- Deeply [compare](https://mikefarah.gitbook.io/yq/commands/compare) yaml files
- Keeps yaml formatting and comments when updating
- [Validate a yaml file](https://mikefarah.gitbook.io/yq/commands/validate)
- Create a yaml file given a [deep path and value](https://mikefarah.gitbook.io/yq/commands/create#creating-a-simple-yaml-file) or a [script file](https://mikefarah.gitbook.io/yq/commands/create#creating-using-a-create-script)
- [Prefix a path to a yaml file](https://mikefarah.gitbook.io/yq/commands/prefix)
- [Convert to/from json to yaml](https://mikefarah.gitbook.io/yq/usage/convert)
- [Pipe data in by using '-'](https://mikefarah.gitbook.io/yq/commands/read#from-stdin)
- [Merge](https://mikefarah.gitbook.io/yq/commands/merge) multiple yaml files with various options for [overriding](https://mikefarah.gitbook.io/yq/commands/merge#overwrite-values) and [appending](https://mikefarah.gitbook.io/yq/commands/merge#append-values-with-arrays)
- Supports multiple documents in a single yaml file for [reading](https://mikefarah.gitbook.io/yq/commands/read#multiple-documents), [writing](https://mikefarah.gitbook.io/yq/commands/write-update#multiple-documents) and [merging](https://mikefarah.gitbook.io/yq/commands/merge#multiple-documents)
- General shell completion scripts (bash/zsh/fish/powershell) (https://mikefarah.gitbook.io/yq/commands/shell-completion)
+- Uses similar syntax as `jq` but works with YAML and JSON files
+- Fully supports multi document yaml files
+- Colorized yaml output
+- [Deeply traverse yaml](https://mikefarah.gitbook.io/yq/v/v4.x/traverse)
+- [Sort yaml by keys](https://mikefarah.gitbook.io/yq/v/v4.x/sort-keys)
+- Manipulate yaml [comments](https://app.gitbook.com/@mikefarah/s/yq/v/v4.x/comment-operators), [styling](https://app.gitbook.com/@mikefarah/s/yq/v/v4.x/style), [tags](https://app.gitbook.com/@mikefarah/s/yq/v/v4.x/tag) and [anchors](https://app.gitbook.com/@mikefarah/s/yq/v/v4.x/explode).
+- [Update yaml inplace](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate#flags)
+- [Complex expressions to select and update](https://mikefarah.gitbook.io/yq/v/v4.x/select#select-and-update-matching-values-in-map)
+- Keeps yaml formatting and comments when updating (though there are issues with whitespace)
+- [Convert to/from json to yaml](https://mikefarah.gitbook.io/yq/v/v4.x/usage/convert)
+- [Pipe data in by using '-'](https://mikefarah.gitbook.io/yq/v/v4.x/commands/evaluate)
+- General shell completion scripts (bash/zsh/fish/powershell) (https://mikefarah.gitbook.io/yq/v/v4.x/commands/shell-completion)

 ## [Usage](https://mikefarah.gitbook.io/yq/)

@@ -135,32 +139,42 @@ Usage:
  yq [command]

 Available Commands:
-  compare          yq x [--prettyPrint/-P] dataA.yaml dataB.yaml 'b.e(name==fr*).value'
-  delete           yq d [--inplace/-i] [--doc/-d index] sample.yaml 'b.e(name==fred)'
+  eval             Apply expression to each document in each yaml file given in sequence
+  eval-all         Loads _all_ yaml documents of _all_ yaml files and runs expression once
  help             Help about any command
-  merge            yq m [--inplace/-i] [--doc/-d index] [--overwrite/-x] [--append/-a] sample.yaml sample2.yaml
-  new              yq n [--script/-s script_file] a.b.c newValue
-  prefix           yq p [--inplace/-i] [--doc/-d index] sample.yaml a.b.c
-  read             yq r [--printMode/-p pv] sample.yaml 'b.e(name==fr*).value'
-  shell-completion Generates shell completion scripts
-  validate         yq v sample.yaml
-  write            yq w [--inplace/-i] [--script/-s script_file] [--doc/-d index] sample.yaml 'b.e(name==fr*).value' newValue
+  shell-completion Generate completion script

 Flags:
-  -C, --colors        print with colors
+  -C, --colors        force print with colors
+  -e, --exit-status   set exit status if there are no matches or null or false is returned
  -h, --help          help for yq
  -I, --indent int    sets indent level for output (default 2)
-  -P, --prettyPrint   pretty print
-  -j, --tojson        output as json. By default it prints a json document in one line, use the prettyPrint flag to print a formatted doc.
+  -i, --inplace       update the yaml file inplace of first yaml file given.
+  -M, --no-colors     force print with no colors
+  -N, --no-doc        Don't print document separators (---)
+  -n, --null-input    Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.
+  -j, --tojson        output as json. Set indent to 0 to print json in one line.
  -v, --verbose       verbose mode
  -V, --version       Print version information and quit

 Use "yq [command] --help" for more information about a command.
 ```

-## Upgrade from V2
-If you've been using v2 and want/need to upgrade, checkout the [upgrade guide](https://mikefarah.gitbook.io/yq/upgrading-from-v2).
+Simple Example:
+
+```bash
+yq e '.a.b | length' f1.yml f2.yml 
+```
+
+## Upgrade from V3
+If you've been using v3 and want/need to upgrade, checkout the [upgrade guide](https://mikefarah.gitbook.io/yq/v/v4.x/upgrading-from-v3).
+
+## V4 is in development!
+If you're keen - check out the alpha release [here](https://github.com/mikefarah/yq/releases/), or in docker `mikefarah/yq:4-beta1` and the docs (also in beta) [here](https://mikefarah.gitbook.io/yq/v/v4.x-alpha/).
+
+V4 is quite different from V3 (sorry for the migration), however it will be much more similar to ```jq```, use a similar expression syntax and therefore support much more complex functionality! 
+
+For now - new features will be held off from V3 in anticipation of the V4 build. Critical fixes / issues will still be released.

 ## Known Issues / Missing Features
 - `yq` attempts to preserve comment positions and whitespace as much as possible, but it does not handle all scenarios (see https://github.com/go-yaml/yaml/tree/v3 for details)
- You cannot (yet) select multiple paths/keys from the yaml to be printed out (https://github.com/mikefarah/yq/issues/287)
--- a/cmd/evaluate_all_command.go
+++ b/cmd/evaluate_all_command.go
@@ -15,9 +15,8 @@ func createEvaluateAllCommand() *cobra.Command {
 		Aliases: []string{"ea"},
 		Short:   "Loads _all_ yaml documents of _all_ yaml files and runs expression once",
 		Example: `
-yq es '.a.b | length' file1.yml file2.yml
-yq es < sample.yaml
-yq es -n '{"a": "b"}'
+# merges f2.yml into f1.yml (inplace)
+yq eval-all --inplace 'select(fileIndex == 0) * select(fileIndex == 1)' f1.yml f2.yml		
 `,
 		Long: "Evaluate All:\nUseful when you need to run an expression across several yaml documents or files. Consumes more memory than eval",
 		RunE: evaluateAll,
--- a/cmd/evalute_sequence_command.go
+++ b/cmd/evalute_sequence_command.go
@@ -15,9 +15,18 @@ func createEvaluateSequenceCommand() *cobra.Command {
 		Aliases: []string{"e"},
 		Short:   "Apply expression to each document in each yaml file given in sequence",
 		Example: `
-yq es '.a.b | length' file1.yml file2.yml
-yq es < sample.yaml
-yq es -n '{"a": "b"}'
+# runs the expression against each file, in series
+yq e '.a.b | length' f1.yml f2.yml 
+
+# prints out the file
+yq e sample.yaml 
+
+# prints a new yaml document
+yq e -n '.a.b.c = "cat"' 
+
+
+# updates file.yaml directly
+yq e '.a.b = "cool"' -i file.yaml 
 `,
 		Long: "Evaluate Sequence:\nIterate over each yaml document, apply the expression and print the results, in sequence.",
 		RunE: evaluateSequence,
--- a/cmd/version.go
+++ b/cmd/version.go
@@ -11,7 +11,7 @@ var (
 	GitDescribe string

 	// Version is main version number that is being run at the moment.
-	Version = "4.0.0-beta1"
+	Version = "4.0.0"

 	// 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
--- a/go.mod
+++ b/go.mod
@@ -6,8 +6,7 @@ require (
 	github.com/goccy/go-yaml v1.8.1
 	github.com/jinzhu/copier v0.0.0-20190924061706-b57f9002281a
 	github.com/mattn/go-colorable v0.1.7 // indirect
-	github.com/spf13/cobra v1.0.0
-	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/spf13/cobra v1.1.1
 	github.com/timtadh/data-structures v0.5.3 // indirect
 	github.com/timtadh/lexmachine v0.2.2
 	golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f // indirect
--- a/go.sum
+++ b/go.sum
@@ -1,16 +1,33 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
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@@ -26,6 +43,7 @@ github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
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@@ -39,20 +57,54 @@ github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zV
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@@ -76,14 +130,26 @@ github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOA
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+golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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+golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 h1:/atklqdjdhuosWIl6AIbOeHJjicWYPqR9bpxqxYG2pA=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
+google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
+google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
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+google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
+google.golang.org/genproto v0.0.0-20191108220845-16a3f7862a1a/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v9 v9.30.0/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
+gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473 h1:6D+BvnJ/j6e222UW8s2qTSe3wGBtvo0MbVQG/c5k8RE=
 gopkg.in/op/go-logging.v1 v1.0.0-20160211212156-b2cb9fa56473/go.mod h1:N1eN2tsCx0Ydtgjl4cqmbRCsY4/+z4cYDeqwZTk6zog=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
@@ -183,6 +332,13 @@ gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bl
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 h1:tQIYjPdBoyREyB9XMu+nnTclpTYkz2zFM+lzLJFO4gQ=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
--- a/pkg/yqlib/doc/Assign.md
+++ b/pkg/yqlib/doc/Assign.md
@@ -8,7 +8,7 @@ This will do a similar thing to the plain form, however, the RHS expression is r
 ## Create yaml file
 Running
 ```bash
-yq eval --null-input '(.a.b = "cat") | (.x = "frog")'
+yq eval --null-input '.a.b = "cat" | .x = "frog"'
 ```
 will output
 ```yaml
@@ -112,7 +112,7 @@ a:
 ```
 then
 ```bash
-yq eval '.a.[] | select(. == "apple") |= "frog"' sample.yml
+yq eval '(.a.[] | select(. == "apple")) = "frog"' sample.yml
 ```
 will output
 ```yaml
@@ -130,7 +130,7 @@ Given a sample.yml file of:
 ```
 then
 ```bash
-yq eval '.[] | select(. == "*andy") |= "bogs"' sample.yml
+yq eval '(.[] | select(. == "*andy")) = "bogs"' sample.yml
 ```
 will output
 ```yaml
--- a/pkg/yqlib/doc/Length.md
+++ b/pkg/yqlib/doc/Length.md
@@ -0,0 +1,54 @@
+Returns the lengths of the nodes. Length is defined according to the type of the node.
+
+## String length
+returns length of string
+
+Given a sample.yml file of:
+```yaml
+a: cat
+```
+then
+```bash
+yq eval '.a | length' sample.yml
+```
+will output
+```yaml
+3
+```
+
+## Map length
+returns number of entries
+
+Given a sample.yml file of:
+```yaml
+a: cat
+c: dog
+```
+then
+```bash
+yq eval 'length' sample.yml
+```
+will output
+```yaml
+2
+```
+
+## Array length
+returns number of elements
+
+Given a sample.yml file of:
+```yaml
+- 2
+- 4
+- 6
+- 8
+```
+then
+```bash
+yq eval 'length' sample.yml
+```
+will output
+```yaml
+4
+```
+
--- a/pkg/yqlib/doc/Pipe.md
+++ b/pkg/yqlib/doc/Pipe.md
@@ -0,0 +1,35 @@
+Pipe the results of an expression into another. Like the bash operator.
+
+## Simple Pipe
+Given a sample.yml file of:
+```yaml
+a:
+  b: cat
+```
+then
+```bash
+yq eval '.a | .b' sample.yml
+```
+will output
+```yaml
+cat
+```
+
+## Multiple updates
+Given a sample.yml file of:
+```yaml
+a: cow
+b: sheep
+c: same
+```
+then
+```bash
+yq eval '.a = "cat" | .b = "dog"' sample.yml
+```
+will output
+```yaml
+a: cat
+b: dog
+c: same
+```
+
--- a/pkg/yqlib/doc/headers/Length.md
+++ b/pkg/yqlib/doc/headers/Length.md
@@ -0,0 +1 @@
+Returns the lengths of the nodes. Length is defined according to the type of the node.
--- a/pkg/yqlib/doc/headers/Pipe.md
+++ b/pkg/yqlib/doc/headers/Pipe.md
@@ -0,0 +1 @@
+Pipe the results of an expression into another. Like the bash operator.
--- a/pkg/yqlib/lib.go
+++ b/pkg/yqlib/lib.go
@@ -21,14 +21,14 @@ type OperationType struct {
 // operators TODO:
 // - cookbook doc for common things
 // - mergeEmpty (sets only if the document is empty, do I do that now?)
-// - compare ??
-// - validate ??

 var Or = &OperationType{Type: "OR", NumArgs: 2, Precedence: 20, Handler: OrOperator}
 var And = &OperationType{Type: "AND", NumArgs: 2, Precedence: 20, Handler: AndOperator}

 var Union = &OperationType{Type: "UNION", NumArgs: 2, Precedence: 10, Handler: UnionOperator}

+var Pipe = &OperationType{Type: "PIPE", NumArgs: 2, Precedence: 30, Handler: PipeOperator}
+
 var Assign = &OperationType{Type: "ASSIGN", NumArgs: 2, Precedence: 40, Handler: AssignUpdateOperator}
 var AddAssign = &OperationType{Type: "ADD_ASSIGN", NumArgs: 2, Precedence: 40, Handler: AddAssignOperator}

@@ -42,7 +42,8 @@ var Add = &OperationType{Type: "ADD", NumArgs: 2, Precedence: 45, Handler: AddOp

 var Equals = &OperationType{Type: "EQUALS", NumArgs: 2, Precedence: 40, Handler: EqualsOperator}
 var CreateMap = &OperationType{Type: "CREATE_MAP", NumArgs: 2, Precedence: 40, Handler: CreateMapOperator}
-var Pipe = &OperationType{Type: "PIPE", NumArgs: 2, Precedence: 45, Handler: PipeOperator}
+
+var ShortPipe = &OperationType{Type: "SHORT_PIPE", NumArgs: 2, Precedence: 45, Handler: PipeOperator}

 var Length = &OperationType{Type: "LENGTH", NumArgs: 0, Precedence: 50, Handler: LengthOperator}
 var Collect = &OperationType{Type: "COLLECT", NumArgs: 0, Precedence: 50, Handler: CollectOperator}
--- a/pkg/yqlib/operator_assign_test.go
+++ b/pkg/yqlib/operator_assign_test.go
@@ -7,7 +7,7 @@ import (
 var assignOperatorScenarios = []expressionScenario{
 	{
 		description: "Create yaml file",
-		expression:  `(.a.b = "cat") | (.x = "frog")`,
+		expression:  `.a.b = "cat" | .x = "frog"`,
 		expected: []string{
 			"D0, P[], ()::a:\n    b: cat\nx: frog\n",
 		},
@@ -80,7 +80,7 @@ var assignOperatorScenarios = []expressionScenario{
 	{
 		description: "Update selected results",
 		document:    `{a: {b: apple, c: cactus}}`,
-		expression:  `.a.[] | select(. == "apple") |= "frog"`,
+		expression:  `(.a.[] | select(. == "apple")) = "frog"`,
 		expected: []string{
 			"D0, P[], (doc)::{a: {b: frog, c: cactus}}\n",
 		},
@@ -88,7 +88,7 @@ var assignOperatorScenarios = []expressionScenario{
 	{
 		description: "Update array values",
 		document:    `[candy, apple, sandy]`,
-		expression:  `.[] | select(. == "*andy") |= "bogs"`,
+		expression:  `(.[] | select(. == "*andy")) = "bogs"`,
 		expected: []string{
 			"D0, P[], (doc)::[bogs, apple, bogs]\n",
 		},
--- a/pkg/yqlib/operator_length.go
+++ b/pkg/yqlib/operator_length.go
@@ -0,0 +1,35 @@
+package yqlib
+
+import (
+	"container/list"
+	"fmt"
+
+	yaml "gopkg.in/yaml.v3"
+)
+
+func LengthOperator(d *dataTreeNavigator, matchMap *list.List, pathNode *PathTreeNode) (*list.List, error) {
+	log.Debugf("-- lengthOperation")
+	var results = list.New()
+
+	for el := matchMap.Front(); el != nil; el = el.Next() {
+		candidate := el.Value.(*CandidateNode)
+		targetNode := UnwrapDoc(candidate.Node)
+		var length int
+		switch targetNode.Kind {
+		case yaml.ScalarNode:
+			length = len(targetNode.Value)
+		case yaml.MappingNode:
+			length = len(targetNode.Content) / 2
+		case yaml.SequenceNode:
+			length = len(targetNode.Content)
+		default:
+			length = 0
+		}
+
+		node := &yaml.Node{Kind: yaml.ScalarNode, Value: fmt.Sprintf("%v", length), Tag: "!!int"}
+		lengthCand := &CandidateNode{Node: node, Document: candidate.Document, Path: candidate.Path}
+		results.PushBack(lengthCand)
+	}
+
+	return results, nil
+}
--- a/pkg/yqlib/operator_length_test.go
+++ b/pkg/yqlib/operator_length_test.go
@@ -0,0 +1,42 @@
+package yqlib
+
+import (
+	"testing"
+)
+
+var lengthOperatorScenarios = []expressionScenario{
+	{
+		description:    "String length",
+		subdescription: "returns length of string",
+		document:       `{a: cat}`,
+		expression:     `.a | length`,
+		expected: []string{
+			"D0, P[a], (!!int)::3\n",
+		},
+	},
+	{
+		description:    "Map length",
+		subdescription: "returns number of entries",
+		document:       `{a: cat, c: dog}`,
+		expression:     `length`,
+		expected: []string{
+			"D0, P[], (!!int)::2\n",
+		},
+	},
+	{
+		description:    "Array length",
+		subdescription: "returns number of elements",
+		document:       `[2,4,6,8]`,
+		expression:     `length`,
+		expected: []string{
+			"D0, P[], (!!int)::4\n",
+		},
+	},
+}
+
+func TestLengthOperatorScenarios(t *testing.T) {
+	for _, tt := range lengthOperatorScenarios {
+		testScenario(t, &tt)
+	}
+	documentScenarios(t, "Length", lengthOperatorScenarios)
+}
--- a/pkg/yqlib/operator_multiply.go
+++ b/pkg/yqlib/operator_multiply.go
@@ -111,7 +111,7 @@ func createTraversalTree(path []interface{}) *PathTreeNode {
 		return &PathTreeNode{Operation: &Operation{OperationType: TraversePath, Value: path[0], StringValue: fmt.Sprintf("%v", path[0])}}
 	}
 	return &PathTreeNode{
-		Operation: &Operation{OperationType: Pipe},
+		Operation: &Operation{OperationType: ShortPipe},
 		Lhs:       createTraversalTree(path[0:1]),
 		Rhs:       createTraversalTree(path[1:])}

--- a/pkg/yqlib/operator_pipe.go
+++ b/pkg/yqlib/operator_pipe.go
@@ -0,0 +1,11 @@
+package yqlib
+
+import "container/list"
+
+func PipeOperator(d *dataTreeNavigator, matchingNodes *list.List, pathNode *PathTreeNode) (*list.List, error) {
+	lhs, err := d.GetMatchingNodes(matchingNodes, pathNode.Lhs)
+	if err != nil {
+		return nil, err
+	}
+	return d.GetMatchingNodes(lhs, pathNode.Rhs)
+}
--- a/pkg/yqlib/operator_pipe_test.go
+++ b/pkg/yqlib/operator_pipe_test.go
@@ -0,0 +1,31 @@
+package yqlib
+
+import (
+	"testing"
+)
+
+var pipeOperatorScenarios = []expressionScenario{
+	{
+		description: "Simple Pipe",
+		document:    `{a: {b: cat}}`,
+		expression:  `.a | .b`,
+		expected: []string{
+			"D0, P[a b], (!!str)::cat\n",
+		},
+	},
+	{
+		description: "Multiple updates",
+		document:    `{a: cow, b: sheep, c: same}`,
+		expression:  `.a = "cat" | .b = "dog"`,
+		expected: []string{
+			"D0, P[], (doc)::{a: cat, b: dog, c: same}\n",
+		},
+	},
+}
+
+func TestPipeOperatorScenarios(t *testing.T) {
+	for _, tt := range pipeOperatorScenarios {
+		testScenario(t, &tt)
+	}
+	documentScenarios(t, "Pipe", pipeOperatorScenarios)
+}
--- a/pkg/yqlib/operators.go
+++ b/pkg/yqlib/operators.go
@@ -2,7 +2,6 @@ package yqlib

 import (
 	"container/list"
-	"fmt"

 	"gopkg.in/yaml.v3"
 )
@@ -20,14 +19,6 @@ func EmptyOperator(d *dataTreeNavigator, matchingNodes *list.List, pathNode *Pat
 	return list.New(), nil
 }

-func PipeOperator(d *dataTreeNavigator, matchingNodes *list.List, pathNode *PathTreeNode) (*list.List, error) {
-	lhs, err := d.GetMatchingNodes(matchingNodes, pathNode.Lhs)
-	if err != nil {
-		return nil, err
-	}
-	return d.GetMatchingNodes(lhs, pathNode.Rhs)
-}
-
 func createBooleanCandidate(owner *CandidateNode, value bool) *CandidateNode {
 	valString := "true"
 	if !value {
@@ -42,29 +33,3 @@ func nodeToMap(candidate *CandidateNode) *list.List {
 	elMap.PushBack(candidate)
 	return elMap
 }
-
-func LengthOperator(d *dataTreeNavigator, matchMap *list.List, pathNode *PathTreeNode) (*list.List, error) {
-	log.Debugf("-- lengthOperation")
-	var results = list.New()
-
-	for el := matchMap.Front(); el != nil; el = el.Next() {
-		candidate := el.Value.(*CandidateNode)
-		var length int
-		switch candidate.Node.Kind {
-		case yaml.ScalarNode:
-			length = len(candidate.Node.Value)
-		case yaml.MappingNode:
-			length = len(candidate.Node.Content) / 2
-		case yaml.SequenceNode:
-			length = len(candidate.Node.Content)
-		default:
-			length = 0
-		}
-
-		node := &yaml.Node{Kind: yaml.ScalarNode, Value: fmt.Sprintf("%v", length), Tag: "!!int"}
-		lengthCand := &CandidateNode{Node: node, Document: candidate.Document, Path: candidate.Path}
-		results.PushBack(lengthCand)
-	}
-
-	return results, nil
-}
--- a/pkg/yqlib/path_parse_test.go
+++ b/pkg/yqlib/path_parse_test.go
@@ -11,58 +11,46 @@ var pathTests = []struct {
 	path            string
 	expectedTokens  []interface{}
 	expectedPostFix []interface{}
-}{ // TODO: Ensure ALL documented examples have tests! sheesh
-	// {"len(.)", append(make([]interface{}, 0), "LENGTH", "(", "SELF", ")")},
-	// {"\"len\"(.)", append(make([]interface{}, 0), "len", "TRAVERSE", "(", "SELF", ")")},
-	// {".a OR (.b OR .c)", append(make([]interface{}, 0), "a", "OR", "(", "b", "OR", "c", ")")},
-	// {"a OR (b OR c)", append(make([]interface{}, 0), "a", "OR", "(", "b", "OR", "c", ")")},
-	// {"a .- (b OR c)", append(make([]interface{}, 0), "a", " .- ", "(", "b", "OR", "c", ")")},
-	// {"(animal==3)", append(make([]interface{}, 0), "(", "animal", "==", int64(3), ")")},
-	// {"(animal==f3)", append(make([]interface{}, 0), "(", "animal", "==", "f3", ")")},
-	// {"apples.BANANAS", append(make([]interface{}, 0), "apples", "TRAVERSE", "BANANAS")},
-	// {"appl*.BANA*", append(make([]interface{}, 0), "appl*", "TRAVERSE", "BANA*")},
-	// {"a.b.**", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "**")},
-	// {"a.\"=\".frog", append(make([]interface{}, 0), "a", "TRAVERSE", "=", "TRAVERSE", "frog")},
-	// {"a.b.*", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "*")},
-	// {"a.b.thin*", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "thin*")},
-	// {".a.b.[0]", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", int64(0))},
-	// {".a.b.[]", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "[]")},
-	// {".a.b.[+]", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "[+]")},
-	// {".a.b.[-12]", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", int64(-12))},
-	// {".a.b.0", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "0")},
-	// {".a", append(make([]interface{}, 0), "a")},
-	// {".\"a.b\".c", append(make([]interface{}, 0), "a.b", "TRAVERSE", "c")},
-	// {`.b."foo.bar"`, append(make([]interface{}, 0), "b", "TRAVERSE", "foo.bar")},
-	// {`f | . == *og | length`, append(make([]interface{}, 0), "f", "TRAVERSE", "SELF", "EQUALS", "*og", "TRAVERSE", "LENGTH")},
-	// {`.a, .b`, append(make([]interface{}, 0), "a", "OR", "b")},
-	// {`[.a, .b]`, append(make([]interface{}, 0), "[", "a", "OR", "b", "]")},
-	// {`."[a", ."b]"`, append(make([]interface{}, 0), "[a", "OR", "b]")},
-	// {`.a.[]`, append(make([]interface{}, 0), "a", "PIPE", "[]")},
-	// {`.[].a`, append(make([]interface{}, 0), "[]", "PIPE", "a")},
-	// {
-	// 	`["cat"]`,
-	// 	append(make([]interface{}, 0), "[", "cat (string)", "]"),
-	// 	append(make([]interface{}, 0), "cat (string)", "COLLECT", "PIPE"),
-	// },
+}{
 	{
 		`[]`,
 		append(make([]interface{}, 0), "[", "]"),
-		append(make([]interface{}, 0), "EMPTY", "COLLECT", "PIPE"),
+		append(make([]interface{}, 0), "EMPTY", "COLLECT", "SHORT_PIPE"),
+	},
+	{
+		`.a[]`,
+		append(make([]interface{}, 0), "a", "SHORT_PIPE", "[]"),
+		append(make([]interface{}, 0), "a", "[]", "SHORT_PIPE"),
+	},
+	{
+		`.a.[]`,
+		append(make([]interface{}, 0), "a", "SHORT_PIPE", "[]"),
+		append(make([]interface{}, 0), "a", "[]", "SHORT_PIPE"),
+	},
+	{
+		`.a[].c`,
+		append(make([]interface{}, 0), "a", "SHORT_PIPE", "[]", "SHORT_PIPE", "c"),
+		append(make([]interface{}, 0), "a", "[]", "SHORT_PIPE", "c", "SHORT_PIPE"),
 	},
 	{
 		`[3]`,
 		append(make([]interface{}, 0), "[", "3 (int64)", "]"),
-		append(make([]interface{}, 0), "3 (int64)", "COLLECT", "PIPE"),
+		append(make([]interface{}, 0), "3 (int64)", "COLLECT", "SHORT_PIPE"),
 	},
 	{
 		`d0.a`,
-		append(make([]interface{}, 0), "d0", "PIPE", "a"),
-		append(make([]interface{}, 0), "d0", "a", "PIPE"),
+		append(make([]interface{}, 0), "d0", "SHORT_PIPE", "a"),
+		append(make([]interface{}, 0), "d0", "a", "SHORT_PIPE"),
 	},
 	{
-		`.a | (.[].b == "apple")`,
-		append(make([]interface{}, 0), "a", "PIPE", "(", "[]", "PIPE", "b", "EQUALS", "apple (string)", ")"),
-		append(make([]interface{}, 0), "a", "[]", "b", "PIPE", "apple (string)", "EQUALS", "PIPE"),
+		`.a | .[].b == "apple"`,
+		append(make([]interface{}, 0), "a", "PIPE", "[]", "SHORT_PIPE", "b", "EQUALS", "apple (string)"),
+		append(make([]interface{}, 0), "a", "[]", "b", "SHORT_PIPE", "apple (string)", "EQUALS", "PIPE"),
+	},
+	{
+		`(.a | .[].b) == "apple"`,
+		append(make([]interface{}, 0), "(", "a", "PIPE", "[]", "SHORT_PIPE", "b", ")", "EQUALS", "apple (string)"),
+		append(make([]interface{}, 0), "a", "[]", "b", "SHORT_PIPE", "PIPE", "apple (string)", "EQUALS"),
 	},
 	{
 		`.[] | select(. == "*at")`,
@@ -72,12 +60,12 @@ var pathTests = []struct {
 	{
 		`[true]`,
 		append(make([]interface{}, 0), "[", "true (bool)", "]"),
-		append(make([]interface{}, 0), "true (bool)", "COLLECT", "PIPE"),
+		append(make([]interface{}, 0), "true (bool)", "COLLECT", "SHORT_PIPE"),
 	},
 	{
 		`[true, false]`,
 		append(make([]interface{}, 0), "[", "true (bool)", "UNION", "false (bool)", "]"),
-		append(make([]interface{}, 0), "true (bool)", "false (bool)", "UNION", "COLLECT", "PIPE"),
+		append(make([]interface{}, 0), "true (bool)", "false (bool)", "UNION", "COLLECT", "SHORT_PIPE"),
 	},
 	{
 		`"mike": .a`,
@@ -92,27 +80,27 @@ var pathTests = []struct {
 	{
 		`{"mike": .a}`,
 		append(make([]interface{}, 0), "{", "mike (string)", "CREATE_MAP", "a", "}"),
-		append(make([]interface{}, 0), "mike (string)", "a", "CREATE_MAP", "COLLECT_OBJECT", "PIPE"),
+		append(make([]interface{}, 0), "mike (string)", "a", "CREATE_MAP", "COLLECT_OBJECT", "SHORT_PIPE"),
 	},
 	{
 		`{.a: "mike"}`,
 		append(make([]interface{}, 0), "{", "a", "CREATE_MAP", "mike (string)", "}"),
-		append(make([]interface{}, 0), "a", "mike (string)", "CREATE_MAP", "COLLECT_OBJECT", "PIPE"),
+		append(make([]interface{}, 0), "a", "mike (string)", "CREATE_MAP", "COLLECT_OBJECT", "SHORT_PIPE"),
 	},
 	{
 		`{.a: .c, .b.[]: .f.g.[]}`,
-		append(make([]interface{}, 0), "{", "a", "CREATE_MAP", "c", "UNION", "b", "PIPE", "[]", "CREATE_MAP", "f", "PIPE", "g", "PIPE", "[]", "}"),
-		append(make([]interface{}, 0), "a", "c", "CREATE_MAP", "b", "[]", "PIPE", "f", "g", "PIPE", "[]", "PIPE", "CREATE_MAP", "UNION", "COLLECT_OBJECT", "PIPE"),
+		append(make([]interface{}, 0), "{", "a", "CREATE_MAP", "c", "UNION", "b", "SHORT_PIPE", "[]", "CREATE_MAP", "f", "SHORT_PIPE", "g", "SHORT_PIPE", "[]", "}"),
+		append(make([]interface{}, 0), "a", "c", "CREATE_MAP", "b", "[]", "SHORT_PIPE", "f", "g", "SHORT_PIPE", "[]", "SHORT_PIPE", "CREATE_MAP", "UNION", "COLLECT_OBJECT", "SHORT_PIPE"),
 	},
 	{
 		`explode(.a.b)`,
-		append(make([]interface{}, 0), "EXPLODE", "(", "a", "PIPE", "b", ")"),
-		append(make([]interface{}, 0), "a", "b", "PIPE", "EXPLODE"),
+		append(make([]interface{}, 0), "EXPLODE", "(", "a", "SHORT_PIPE", "b", ")"),
+		append(make([]interface{}, 0), "a", "b", "SHORT_PIPE", "EXPLODE"),
 	},
 	{
 		`.a.b style="folded"`,
-		append(make([]interface{}, 0), "a", "PIPE", "b", "ASSIGN_STYLE", "folded (string)"),
-		append(make([]interface{}, 0), "a", "b", "PIPE", "folded (string)", "ASSIGN_STYLE"),
+		append(make([]interface{}, 0), "a", "SHORT_PIPE", "b", "ASSIGN_STYLE", "folded (string)"),
+		append(make([]interface{}, 0), "a", "b", "SHORT_PIPE", "folded (string)", "ASSIGN_STYLE"),
 	},
 	{
 		`tag == "str"`,
@@ -135,11 +123,11 @@ var pathTests = []struct {
 		append(make([]interface{}, 0), "SELF", "str (string)", "ASSIGN_COMMENT"),
 	},

-	// {
-	// 	`.a.b tag="!!str"`,
-	// 	append(make([]interface{}, 0), "EXPLODE", "(", "a", "PIPE", "b", ")"),
-	// 	append(make([]interface{}, 0), "a", "b", "PIPE", "EXPLODE"),
-	// },
+	{
+		`.a.b tag="!!str"`,
+		append(make([]interface{}, 0), "a", "SHORT_PIPE", "b", "ASSIGN_TAG", "!!str (string)"),
+		append(make([]interface{}, 0), "a", "b", "SHORT_PIPE", "!!str (string)", "ASSIGN_TAG"),
+	},
 	{
 		`""`,
 		append(make([]interface{}, 0), " (string)"),
@@ -153,27 +141,8 @@ var pathTests = []struct {
 	{
 		`{}`,
 		append(make([]interface{}, 0), "{", "}"),
-		append(make([]interface{}, 0), "EMPTY", "COLLECT_OBJECT", "PIPE"),
+		append(make([]interface{}, 0), "EMPTY", "COLLECT_OBJECT", "SHORT_PIPE"),
 	},
-
-	// {".animals | .==cat", append(make([]interface{}, 0), "animals", "TRAVERSE", "SELF", "EQUALS", "cat")},
-	// {".animals | (. == cat)", append(make([]interface{}, 0), "animals", "TRAVERSE", "(", "SELF", "EQUALS", "cat", ")")},
-	// {".animals | (.==c*)", append(make([]interface{}, 0), "animals", "TRAVERSE", "(", "SELF", "EQUALS", "c*", ")")},
-	// {"animals(a.b==c*)", append(make([]interface{}, 0), "animals", "TRAVERSE", "(", "a", "TRAVERSE", "b", "==", "c*", ")")},
-	// {"animals.(a.b==c*)", append(make([]interface{}, 0), "animals", "TRAVERSE", "(", "a", "TRAVERSE", "b", "==", "c*", ")")},
-	// {"(a.b==c*).animals", append(make([]interface{}, 0), "(", "a", "TRAVERSE", "b", "==", "c*", ")", "TRAVERSE", "animals")},
-	// {"(a.b==c*)animals", append(make([]interface{}, 0), "(", "a", "TRAVERSE", "b", "==", "c*", ")", "TRAVERSE", "animals")},
-	// {"[1].a.d", append(make([]interface{}, 0), int64(1), "TRAVERSE", "a", "TRAVERSE", "d")},
-	// {"[1]a.d", append(make([]interface{}, 0), int64(1), "TRAVERSE", "a", "TRAVERSE", "d")},
-	// {"a[0]c", append(make([]interface{}, 0), "a", "TRAVERSE", int64(0), "TRAVERSE", "c")},
-	// {"a.[0].c", append(make([]interface{}, 0), "a", "TRAVERSE", int64(0), "TRAVERSE", "c")},
-	// {"[0]", append(make([]interface{}, 0), int64(0))},
-	// {"0", append(make([]interface{}, 0), int64(0))},
-	// {"a.b[+]c", append(make([]interface{}, 0), "a", "TRAVERSE", "b", "TRAVERSE", "[+]", "TRAVERSE", "c")},
-	// {"a.cool(s.d.f == cool)", append(make([]interface{}, 0), "a", "TRAVERSE", "cool", "TRAVERSE", "(", "s", "TRAVERSE", "d", "TRAVERSE", "f", " == ", "cool", ")")},
-	// {"a.cool.(s.d.f==cool OR t.b.h==frog).caterpillar", append(make([]interface{}, 0), "a", "TRAVERSE", "cool", "TRAVERSE", "(", "s", "TRAVERSE", "d", "TRAVERSE", "f", "==", "cool", "OR", "t", "TRAVERSE", "b", "TRAVERSE", "h", "==", "frog", ")", "TRAVERSE", "caterpillar")},
-	// {"a.cool(s.d.f==cool and t.b.h==frog)*", append(make([]interface{}, 0), "a", "TRAVERSE", "cool", "TRAVERSE", "(", "s", "TRAVERSE", "d", "TRAVERSE", "f", "==", "cool", "and", "t", "TRAVERSE", "b", "TRAVERSE", "h", "==", "frog", ")", "TRAVERSE", "*")},
-	// {"a.cool(s.d.f==cool and t.b.h==frog).th*", append(make([]interface{}, 0), "a", "TRAVERSE", "cool", "TRAVERSE", "(", "s", "TRAVERSE", "d", "TRAVERSE", "f", "==", "cool", "and", "t", "TRAVERSE", "b", "TRAVERSE", "h", "==", "frog", ")", "TRAVERSE", "th*")},
 }

 var tokeniser = NewPathTokeniser()
--- a/pkg/yqlib/path_postfix.go
+++ b/pkg/yqlib/path_postfix.go
@@ -56,7 +56,7 @@ func (p *pathPostFixer) ConvertToPostfix(infixTokens []*Token) ([]*Operation, er
 			// now we should have [] as the last element on the opStack, get rid of it
 			opStack = opStack[0 : len(opStack)-1]
 			//and append a collect to the opStack
-			opStack = append(opStack, &Token{TokenType: OperationToken, Operation: &Operation{OperationType: Pipe}})
+			opStack = append(opStack, &Token{TokenType: OperationToken, Operation: &Operation{OperationType: ShortPipe}})
 			opStack = append(opStack, &Token{TokenType: OperationToken, Operation: &Operation{OperationType: collectOperator}})
 		case CloseBracket:
 			for len(opStack) > 0 && opStack[len(opStack)-1].TokenType != OpenBracket {
--- a/pkg/yqlib/path_tokeniser.go
+++ b/pkg/yqlib/path_tokeniser.go
@@ -1,6 +1,7 @@
 package yqlib

 import (
+	"fmt"
 	"strconv"

 	lex "github.com/timtadh/lexmachine"
@@ -21,6 +22,7 @@ const (
 	CloseCollect
 	OpenCollectObject
 	CloseCollectObject
+	SplatOrEmptyCollect
 )

 type Token struct {
@@ -47,6 +49,8 @@ func (t *Token) toString() string {
 		return "{"
 	} else if t.TokenType == CloseCollectObject {
 		return "}"
+	} else if t.TokenType == SplatOrEmptyCollect {
+		return "[]?"
 	} else {
 		return "NFI"
 	}
@@ -247,6 +251,8 @@ func initLexer() (*lex.Lexer, error) {

 	lexer.Add([]byte(`"[^ "]*"`), stringValue(true))

+	lexer.Add([]byte(`\[\]`), literalToken(SplatOrEmptyCollect, true))
+
 	lexer.Add([]byte(`\[`), literalToken(OpenCollect, false))
 	lexer.Add([]byte(`\]`), literalToken(CloseCollect, true))
 	lexer.Add([]byte(`\{`), literalToken(OpenCollectObject, false))
@@ -283,7 +289,7 @@ func (p *pathTokeniser) Tokenise(path string) ([]*Token, error) {
 	scanner, err := p.lexer.Scanner([]byte(path))

 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("Parsing expression: %v", err)
 	}
 	var tokens []*Token
 	for tok, err, eof := scanner.Next(); !eof; tok, err, eof = scanner.Next() {
@@ -294,35 +300,61 @@ func (p *pathTokeniser) Tokenise(path string) ([]*Token, error) {
 			tokens = append(tokens, token)
 		}
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("Parsing expression: %v", err)
 		}
 	}
 	var postProcessedTokens = make([]*Token, 0)

 	skipNextToken := false

-	for index, token := range tokens {
+	for index := range tokens {
 		if skipNextToken {
 			skipNextToken = false
 		} else {
-
-			if index != len(tokens)-1 && token.AssignOperation != nil &&
-				tokens[index+1].TokenType == OperationToken &&
-				tokens[index+1].Operation.OperationType == Assign {
-				token.Operation = token.AssignOperation
-				skipNextToken = true
-			}
-
-			postProcessedTokens = append(postProcessedTokens, token)
-
-			if index != len(tokens)-1 && token.CheckForPostTraverse &&
-				tokens[index+1].TokenType == OperationToken &&
-				tokens[index+1].Operation.OperationType == TraversePath {
-				op := &Operation{OperationType: Pipe, Value: "PIPE"}
-				postProcessedTokens = append(postProcessedTokens, &Token{TokenType: OperationToken, Operation: op})
-			}
+			postProcessedTokens, skipNextToken = p.handleToken(tokens, index, postProcessedTokens)
 		}
 	}

 	return postProcessedTokens, nil
 }
+
+func (p *pathTokeniser) handleToken(tokens []*Token, index int, postProcessedTokens []*Token) (tokensAccum []*Token, skipNextToken bool) {
+	skipNextToken = false
+	token := tokens[index]
+	if token.TokenType == SplatOrEmptyCollect {
+		if index > 0 && tokens[index-1].TokenType == OperationToken &&
+			tokens[index-1].Operation.OperationType == TraversePath {
+			// must be a splat without a preceding dot , e.g. .a[]
+			// lets put a pipe in front of it, and convert it to a traverse "[]" token
+			pipeOp := &Operation{OperationType: ShortPipe, Value: "PIPE"}
+
+			postProcessedTokens = append(postProcessedTokens, &Token{TokenType: OperationToken, Operation: pipeOp})
+
+			traverseOp := &Operation{OperationType: TraversePath, Value: "[]", StringValue: "[]"}
+			token = &Token{TokenType: OperationToken, Operation: traverseOp, CheckForPostTraverse: true}
+
+		} else {
+			// gotta be a collect empty array, we need to split this into two tokens
+			// one OpenCollect, the other CloseCollect
+			postProcessedTokens = append(postProcessedTokens, &Token{TokenType: OpenCollect})
+			token = &Token{TokenType: CloseCollect, CheckForPostTraverse: true}
+		}
+	}
+
+	if index != len(tokens)-1 && token.AssignOperation != nil &&
+		tokens[index+1].TokenType == OperationToken &&
+		tokens[index+1].Operation.OperationType == Assign {
+		token.Operation = token.AssignOperation
+		skipNextToken = true
+	}
+
+	postProcessedTokens = append(postProcessedTokens, token)
+
+	if index != len(tokens)-1 && token.CheckForPostTraverse &&
+		tokens[index+1].TokenType == OperationToken &&
+		tokens[index+1].Operation.OperationType == TraversePath {
+		op := &Operation{OperationType: ShortPipe, Value: "PIPE"}
+		postProcessedTokens = append(postProcessedTokens, &Token{TokenType: OperationToken, Operation: op})
+	}
+	return postProcessedTokens, skipNextToken
+}
--- a/pkg/yqlib/path_tree.go
+++ b/pkg/yqlib/path_tree.go
@@ -1,6 +1,9 @@
 package yqlib

-import "fmt"
+import (
+	"fmt"
+	"strings"
+)

 var myPathTokeniser = NewPathTokeniser()
 var myPathPostfixer = NewPathPostFixer()
@@ -49,10 +52,16 @@ func (p *pathTreeCreator) CreatePathTree(postFixPath []*Operation) (*PathTreeNod
 		if Operation.OperationType.NumArgs > 0 {
 			numArgs := Operation.OperationType.NumArgs
 			if numArgs == 1 {
+				if len(stack) < 1 {
+					return nil, fmt.Errorf("'%v' expects 1 arg but received none", strings.TrimSpace(Operation.StringValue))
+				}
 				remaining, rhs := stack[:len(stack)-1], stack[len(stack)-1]
 				newNode.Rhs = rhs
 				stack = remaining
 			} else if numArgs == 2 {
+				if len(stack) < 2 {
+					return nil, fmt.Errorf("'%v' expects 2 args but there is %v", strings.TrimSpace(Operation.StringValue), len(stack))
+				}
 				remaining, lhs, rhs := stack[:len(stack)-2], stack[len(stack)-2], stack[len(stack)-1]
 				newNode.Lhs = lhs
 				newNode.Rhs = rhs
@@ -62,7 +71,7 @@ func (p *pathTreeCreator) CreatePathTree(postFixPath []*Operation) (*PathTreeNod
 		stack = append(stack, &newNode)
 	}
 	if len(stack) != 1 {
-		return nil, fmt.Errorf("expected stack to have 1 thing but its %v", stack)
+		return nil, fmt.Errorf("expected end of expression but found '%v', please check expression syntax", strings.TrimSpace(stack[1].Operation.StringValue))
 	}
 	return stack[0], nil
 }
--- a/pkg/yqlib/path_tree_test.go
+++ b/pkg/yqlib/path_tree_test.go
@@ -0,0 +1,42 @@
+package yqlib
+
+import (
+	"testing"
+
+	"github.com/mikefarah/yq/v4/test"
+)
+
+func TestPathTreeNoArgsForTwoArgOp(t *testing.T) {
+	_, err := treeCreator.ParsePath("=")
+	test.AssertResultComplex(t, "'=' expects 2 args but there is 0", err.Error())
+}
+
+func TestPathTreeOneLhsArgsForTwoArgOp(t *testing.T) {
+	_, err := treeCreator.ParsePath(".a =")
+	test.AssertResultComplex(t, "'=' expects 2 args but there is 1", err.Error())
+}
+
+func TestPathTreeOneRhsArgsForTwoArgOp(t *testing.T) {
+	_, err := treeCreator.ParsePath("= .a")
+	test.AssertResultComplex(t, "'=' expects 2 args but there is 1", err.Error())
+}
+
+func TestPathTreeTwoArgsForTwoArgOp(t *testing.T) {
+	_, err := treeCreator.ParsePath(".a = .b")
+	test.AssertResultComplex(t, nil, err)
+}
+
+func TestPathTreeNoArgsForOneArgOp(t *testing.T) {
+	_, err := treeCreator.ParsePath("explode")
+	test.AssertResultComplex(t, "'explode' expects 1 arg but received none", err.Error())
+}
+
+func TestPathTreeOneArgForOneArgOp(t *testing.T) {
+	_, err := treeCreator.ParsePath("explode(.)")
+	test.AssertResultComplex(t, nil, err)
+}
+
+func TestPathTreeExtraArgs(t *testing.T) {
+	_, err := treeCreator.ParsePath("sortKeys(.) explode(.)")
+	test.AssertResultComplex(t, "expected end of expression but found 'explode', please check expression syntax", err.Error())
+}
--- a/pkg/yqlib/printer.go
+++ b/pkg/yqlib/printer.go
@@ -22,6 +22,7 @@ type resultsPrinter struct {
 	writer             io.Writer
 	firstTimePrinting  bool
 	previousDocIndex   uint
+	previousFileIndex  int
 	printedMatches     bool
 }

@@ -89,19 +90,20 @@ func (p *resultsPrinter) PrintResults(matchingNodes *list.List) error {
 		return nil
 	}
 	if p.firstTimePrinting {
-		p.previousDocIndex = matchingNodes.Front().Value.(*CandidateNode).Document
+		node := matchingNodes.Front().Value.(*CandidateNode)
+		p.previousDocIndex = node.Document
+		p.previousFileIndex = node.FileIndex
 		p.firstTimePrinting = false
 	}

 	for el := matchingNodes.Front(); el != nil; el = el.Next() {
 		mappedDoc := el.Value.(*CandidateNode)
 		log.Debug("-- print sep logic: p.firstTimePrinting: %v, previousDocIndex: %v, mappedDoc.Document: %v, printDocSeparators: %v", p.firstTimePrinting, p.previousDocIndex, mappedDoc.Document, p.printDocSeparators)
-		if (p.previousDocIndex != mappedDoc.Document) && p.printDocSeparators {
+		if (p.previousDocIndex != mappedDoc.Document || p.previousFileIndex != mappedDoc.FileIndex) && p.printDocSeparators {
 			log.Debug("-- writing doc sep")
 			if err := p.writeString(bufferedWriter, "---\n"); err != nil {
 				return err
 			}
-
 		}

 		if err := p.printNode(mappedDoc.Node, bufferedWriter); err != nil {
--- a/pkg/yqlib/printer_test.go
+++ b/pkg/yqlib/printer_test.go
@@ -52,7 +52,53 @@ func TestPrinterMultipleDocsInSequence(t *testing.T) {

 	writer.Flush()
 	test.AssertResult(t, multiDocSample, output.String())
+}

+func TestPrinterMultipleFilesInSequence(t *testing.T) {
+	var output bytes.Buffer
+	var writer = bufio.NewWriter(&output)
+	printer := NewPrinter(writer, false, true, false, 2, true)
+
+	inputs, err := readDocuments(strings.NewReader(multiDocSample), "sample.yml", 0)
+	if err != nil {
+		panic(err)
+	}
+
+	el := inputs.Front()
+	elNode := el.Value.(*CandidateNode)
+	elNode.Document = 0
+	elNode.FileIndex = 0
+	sample1 := nodeToMap(elNode)
+
+	el = el.Next()
+	elNode = el.Value.(*CandidateNode)
+	elNode.Document = 0
+	elNode.FileIndex = 1
+	sample2 := nodeToMap(elNode)
+
+	el = el.Next()
+	elNode = el.Value.(*CandidateNode)
+	elNode.Document = 0
+	elNode.FileIndex = 2
+	sample3 := nodeToMap(elNode)
+
+	err = printer.PrintResults(sample1)
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(sample2)
+	if err != nil {
+		panic(err)
+	}
+
+	err = printer.PrintResults(sample3)
+	if err != nil {
+		panic(err)
+	}
+
+	writer.Flush()
+	test.AssertResult(t, multiDocSample, output.String())
 }

 func TestPrinterMultipleDocsInSinglePrint(t *testing.T) {
--- a/release_instructions.txt
+++ b/release_instructions.txt
@@ -4,6 +4,7 @@
 - tag git with same version number
 - make sure local build passes
 - push tag to git
+  - 3.4.0, v3
  - git push --tags
 - make local xcompile (builds binaries for all platforms)

@@ -30,7 +31,7 @@

 - docker
  - build and push latest and new version tag
-  - docker build .  -t mikefarah/yq:latest -t mikefarah/yq:VERSION 
+  - docker build .  -t mikefarah/yq:latest -t mikefarah/yq:3 -t mikefarah/yq:3.X

 - debian package
  - ensure you get all vendor dependencies before packaging
--- a/scripts/check.sh
+++ b/scripts/check.sh
@@ -3,7 +3,7 @@
 set -o errexit
 set -o pipefail

-./bin/golangci-lint run
+./bin/golangci-lint run --timeout=5m

 # ./bin/golangci-lint \
 #   --tests \
--- a/scripts/format.sh
+++ b/scripts/format.sh
@@ -2,3 +2,4 @@

 find . \( -path ./vendor \) -prune -o -name "*.go" -exec goimports -w {} \;
 go mod tidy
+go mod vendor
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -1,5 +1,5 @@
 name: yq
-version: '4.0.0-beta1'
+version: '4.0.0'
 summary: A lightweight and portable command-line YAML processor
 description: |
  The aim of the project is to be the jq or sed of yaml files.
Author	SHA1	Message	Date
Mike Farah	efb9027540	Merge branch 'v4'	2020-12-20 13:31:23 +11:00
Mike Farah	2577fe5425	Increment version	2020-12-20 13:29:12 +11:00
Mike Farah	f39c57fed9	Updating readme for imminent v4 release	2020-12-20 12:39:42 +11:00
Mike Farah	1e8f755e7c	Updating readme for imminent v4 release	2020-12-20 12:37:15 +11:00
Mike Farah	bb088f6aa2	Added better error reporting	2020-12-17 14:19:46 +11:00
Mike Farah	a96b74e779	Added better error reporting	2020-12-17 14:02:54 +11:00
Mike Farah	09a9e1e7f0	handle multiple document streams	2020-12-15 14:33:50 +11:00
Mike Farah	db60746e4e	Can now properly handle .a[] expressions	2020-12-09 12:15:14 +11:00
Shashank Veerapaneni	8846255d1c	Update README.md Fix the wget download command	2020-12-02 19:42:05 +11:00
Mike Farah	a3e422ff76	added another test	2020-12-01 18:10:10 +11:00
Mike Farah	2c3357702d	clarified pipe parsing tests	2020-12-01 18:08:41 +11:00
Mike Farah	c9dbf04da3	Added pipe and length docs, fix pipe precedence	2020-12-01 17:58:07 +11:00
Mike Farah	fbe53885ae	Update README.md	2020-12-01 17:24:14 +11:00
Mike Farah	da027f69d7	updated cobra package	2020-12-01 16:16:20 +11:00
Mike Farah	f42728eef7	updated issue templates	2020-11-25 22:33:50 +11:00
Mike Farah	93136ba840	updated issue templates	2020-11-25 22:32:47 +11:00
Mike Farah	5665dc7b71	updated issue templates	2020-11-25 22:31:55 +11:00
Mike Farah	9302279dd2	updated issue templates	2020-11-25 22:22:16 +11:00
Mike Farah	5972bb2f23	attempt to fix pipeline	2020-11-25 11:17:28 +11:00
Mike Farah	ec43f5e7c3	go mod tidy	2020-11-25 11:06:43 +11:00
Mike Farah	62f262147c	Attempt to fix git pipeline	2020-11-20 14:00:24 +11:00
Mike Farah	0259bb44c1	Updated readme	2020-11-20 13:55:18 +11:00
bahetiamit	e07a5b6065	Adding github action on release to publish multi-arch image	2020-11-20 13:48:35 +11:00
Mike Farah	f69a81b79b	Updated readme re v4	2020-11-19 22:56:13 +11:00
Mike Farah	ccb718cd0f	Moved macports to community, announced v4	2020-10-20 13:58:45 +11:00
Herby Gillot	815edef86a	README: add instructions for installing with MacPorts	2020-10-20 13:50:10 +11:00
Mike Farah	cd83d94b6a	updating release instructions	2020-10-19 09:01:52 +11:00
Mike Farah	6afc2e9189	3.4.1	2020-10-19 08:40:59 +11:00
				`@@ -0,0 +1 @@`
				`Returns the lengths of the nodes. Length is defined according to the type of the node.`
				`@@ -0,0 +1 @@`
				`Pipe the results of an expression into another. Like the bash operator.`