Updated repo name

The delete (short option "d") will delete the YAML subtree at the
provided path in the specified file (or STDIN), if it the node exists.

More complex support is currently omitted, for example:

  - specify nodes to delete using an external script
  - deleting common elements from all elements of an array

Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.9 as builder
+
+WORKDIR /go/src/mikefarah/yq
+
+COPY . /go/src/mikefarah/yq
+
+RUN scripts/devtools.sh
+RUN CGO_ENABLED=0 make local build
+
+# Choose alpine as a base image to make this useful for CI, as many
+# CI tools expect an interactive shell inside the container
+FROM alpine:3.7
+
+COPY --from=builder /go/src/mikefarah/yq/yq /usr/bin/yq
+RUN chmod +x /usr/bin/yq
+
+WORKDIR /workdir

README.md

@@ -17,6 +17,20 @@ or, [Download latest binary](https://github.com/mikefarah/yq/releases/latest) or
 go get github.com/mikefarah/yq
 ```
 
+## Run with Docker
+
+Oneshot use:
+
+```bash
+docker run -v ${PWD}:/workdir mikefarah/yq yq [flags] <command> FILE...
+```
+
+Run commands interactively:
+
+```bash
+docker run -it -v ${PWD}:/workdir mikefarah/yq sh
+```
+
 ## Features
 - Written in portable go, so you can download a lovely dependency free binary
 - Deep read a yaml file with a given path
@@ -41,6 +55,7 @@ Usage:
   yq [command]
 
 Available Commands:
+  delete      yq d [--inplace/-i] sample.yaml a.b.c
   help        Help about any command
   merge       yq m [--inplace/-i] [--overwrite/-x] sample.yaml sample2.yaml
   new         yq n [--script/-s script_file] a.b.c newValueForC

commands_test.go

@@ -103,7 +103,7 @@ func TestRootCmd_VersionShort(t *testing.T) {
 	if result.Error != nil {
 		t.Error(result.Error)
 	}
-	if !strings.Contains(result.Output, "yaml version") {
+	if !strings.Contains(result.Output, "yq version") {
 		t.Error("expected version message to be printed out, but the message was not found.")
 	}
 }
@@ -114,7 +114,7 @@ func TestRootCmd_VersionLong(t *testing.T) {
 	if result.Error != nil {
 		t.Error(result.Error)
 	}
-	if !strings.Contains(result.Output, "yaml version") {
+	if !strings.Contains(result.Output, "yq version") {
 		t.Error("expected version message to be printed out, but the message was not found.")
 	}
 }

data_navigator.go

@@ -18,9 +18,7 @@ func entryInSlice(context yaml.MapSlice, key interface{}) *yaml.MapItem {
 	return nil
 }
 
-func writeMap(context interface{}, paths []string, value interface{}) yaml.MapSlice {
+func getMapSlice(context interface{}) yaml.MapSlice {
-	log.Debugf("writeMap for %v for %v with value %v\n", paths, context, value)
-
 	var mapSlice yaml.MapSlice
 	switch context.(type) {
 	case yaml.MapSlice:
@@ -28,6 +26,25 @@ func writeMap(context interface{}, paths []string, value interface{}) yaml.MapSl
 	default:
 		mapSlice = make(yaml.MapSlice, 0)
 	}
+	return mapSlice
+}
+
+func getArray(context interface{}) (array []interface{}, ok bool) {
+	switch context.(type) {
+	case []interface{}:
+		array = context.([]interface{})
+		ok = true
+	default:
+		array = make([]interface{}, 0)
+		ok = false
+	}
+	return
+}
+
+func writeMap(context interface{}, paths []string, value interface{}) yaml.MapSlice {
+	log.Debugf("writeMap for %v for %v with value %v\n", paths, context, value)
+
+	mapSlice := getMapSlice(context)
 
 	if len(paths) == 0 {
 		return mapSlice
@@ -66,13 +83,7 @@ func updatedChildValue(child interface{}, remainingPaths []string, value interfa
 
 func writeArray(context interface{}, paths []string, value interface{}) []interface{} {
 	log.Debugf("writeArray for %v for %v with value %v\n", paths, context, value)
-	var array []interface{}
+	array, _ := getArray(context)
-	switch context.(type) {
-	case []interface{}:
-		array = context.([]interface{})
-	default:
-		array = make([]interface{}, 0)
-	}
 
 	if len(paths) == 0 {
 		return array
@@ -199,3 +210,93 @@ func mapToMapSlice(data map[interface{}]interface{}) yaml.MapSlice {
 	sort.SliceStable(mapSlice, func(i, j int) bool { return mapSlice[i].Key.(string) < mapSlice[j].Key.(string) })
 	return mapSlice
 }
+
+func deleteMap(context interface{}, paths []string) yaml.MapSlice {
+	log.Debugf("deleteMap for %v for %v\n", paths, context)
+
+	mapSlice := getMapSlice(context)
+
+	if len(paths) == 0 {
+		return mapSlice
+	}
+
+	var found bool
+	var index int
+	var child yaml.MapItem
+	for index, child = range mapSlice {
+		if child.Key == paths[0] {
+			found = true
+			break
+		}
+	}
+
+	if !found {
+		return mapSlice
+	}
+
+	remainingPaths := paths[1:]
+
+	var newSlice yaml.MapSlice
+	if len(remainingPaths) > 0 {
+		newChild := yaml.MapItem{Key: child.Key}
+		newChild.Value = deleteChildValue(child.Value, remainingPaths)
+
+		newSlice = make(yaml.MapSlice, len(mapSlice))
+		for i := range mapSlice {
+			item := mapSlice[i]
+			if i == index {
+				item = newChild
+			}
+			newSlice[i] = item
+		}
+	} else {
+		// Delete item from slice at index
+		newSlice = append(mapSlice[:index], mapSlice[index+1:]...)
+		log.Debugf("\tDeleted item index %d from mapSlice", index)
+	}
+
+	log.Debugf("\t\tlen: %d\tcap: %d\tslice: %v", len(mapSlice), cap(mapSlice), mapSlice)
+	log.Debugf("\tReturning mapSlice %v\n", mapSlice)
+	return newSlice
+}
+
+func deleteArray(context interface{}, paths []string, index int64) interface{} {
+	log.Debugf("deleteArray for %v for %v\n", paths, context)
+
+	array, ok := getArray(context)
+	if !ok {
+		// did not get an array
+		return context
+	}
+
+	if index >= int64(len(array)) {
+		return array
+	}
+
+	remainingPaths := paths[1:]
+	if len(remainingPaths) > 0 {
+		// Recurse into the array element at index
+		array[index] = deleteMap(array[index], remainingPaths)
+	} else {
+		// Delete the array element at index
+		array = append(array[:index], array[index+1:]...)
+		log.Debugf("\tDeleted item index %d from array, leaving %v", index, array)
+	}
+
+	log.Debugf("\tReturning array: %v\n", array)
+	return array
+}
+
+func deleteChildValue(child interface{}, remainingPaths []string) interface{} {
+	log.Debugf("deleteChildValue for %v for %v\n", remainingPaths, child)
+
+	idx, nextIndexErr := strconv.ParseInt(remainingPaths[0], 10, 64)
+	if nextIndexErr != nil {
+		// must be a map
+		log.Debugf("\tdetected a map, invoking deleteMap\n")
+		return deleteMap(child, remainingPaths)
+	}
+
+	log.Debugf("\tdetected an array, so traversing element with index %d\n", idx)
+	return deleteArray(child, remainingPaths, idx)
+}

data_navigator_test.go

@@ -308,3 +308,80 @@ func TestWriteArray_no_paths(t *testing.T) {
 	result := writeArray(data, []string{}, 4)
 	assertResult(t, fmt.Sprintf("%v", data), fmt.Sprintf("%v", result))
 }
+
+func TestDelete_MapItem(t *testing.T) {
+	var data = parseData(`
+a: 123
+b: 456
+`)
+	var expected = parseData(`
+b: 456
+`)
+
+	result := deleteMap(data, []string{"a"})
+	assertResult(t, fmt.Sprintf("%v", expected), fmt.Sprintf("%v", result))
+}
+
+// Ensure deleting an index into a string does nothing
+func TestDelete_index_to_string(t *testing.T) {
+	var data = parseData(`
+a: mystring
+`)
+	result := deleteMap(data, []string{"a", "0"})
+	assertResult(t, fmt.Sprintf("%v", data), fmt.Sprintf("%v", result))
+}
+
+func TestDelete_list_index(t *testing.T) {
+	var data = parseData(`
+a: [3, 4]
+`)
+	var expected = parseData(`
+a: [3]
+`)
+	result := deleteMap(data, []string{"a", "1"})
+	assertResult(t, fmt.Sprintf("%v", expected), fmt.Sprintf("%v", result))
+}
+
+func TestDelete_list_index_beyond_bounds(t *testing.T) {
+	var data = parseData(`
+a: [3, 4]
+`)
+	result := deleteMap(data, []string{"a", "5"})
+	assertResult(t, fmt.Sprintf("%v", data), fmt.Sprintf("%v", result))
+}
+
+func TestDelete_list_index_out_of_bounds_by_1(t *testing.T) {
+	var data = parseData(`
+a: [3, 4]
+`)
+	result := deleteMap(data, []string{"a", "2"})
+	assertResult(t, fmt.Sprintf("%v", data), fmt.Sprintf("%v", result))
+}
+
+func TestDelete_no_paths(t *testing.T) {
+	var data = parseData(`
+a: [3, 4]
+b:
+  - name: test
+`)
+	result := deleteMap(data, []string{})
+	assertResult(t, fmt.Sprintf("%v", data), fmt.Sprintf("%v", result))
+}
+
+func TestDelete_array_map_item(t *testing.T) {
+	var data = parseData(`
+b:
+- name: fred
+  value: blah
+- name: john
+  value: test
+`)
+	var expected = parseData(`
+b:
+- value: blah
+- name: john
+  value: test
+`)
+	result := deleteMap(data, []string{"b", "0", "name"})
+	assertResult(t, fmt.Sprintf("%v", expected), fmt.Sprintf("%v", result))
+}

docs/404.html

@@ -238,6 +238,18 @@
       
 
 
+  <li class="md-nav__item">
+    <a href="/delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
   <li class="md-nav__item">
     <a href="/create/" title="Create" class="md-nav__link">
       Create

docs/convert/index.html

@@ -238,6 +238,18 @@
       
 
 
+  <li class="md-nav__item">
+    <a href="../delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
   <li class="md-nav__item">
     <a href="../create/" title="Create" class="md-nav__link">
       Create

docs/create/index.html

@@ -237,6 +237,18 @@
       
       
 
+
+  <li class="md-nav__item">
+    <a href="../delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
   
 
 
@@ -440,7 +452,7 @@ b.e[0].name: Howdy Partner
     <div class="md-footer-nav">
       <nav class="md-footer-nav__inner md-grid">
         
-          <a href="../write/" title="Write/Update" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev">
+          <a href="../delete/" title="Delete" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev">
             <div class="md-flex__cell md-flex__cell--shrink">
               <i class="md-icon md-icon--arrow-back md-footer-nav__button"></i>
             </div>
@@ -449,7 +461,7 @@ b.e[0].name: Howdy Partner
                 <span class="md-footer-nav__direction">
                   Previous
                 </span>
-                Write/Update
+                Delete
               </span>
             </div>
           </a>

docs/delete/index.html

@@ -0,0 +1,574 @@
+
+
+
+
+<!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">
+      
+      
+      
+      
+        <meta name="lang:clipboard.copy" content="Copy to clipboard">
+      
+        <meta name="lang:clipboard.copied" content="Copied to clipboard">
+      
+        <meta name="lang:search.language" content="en">
+      
+        <meta name="lang:search.result.none" content="No matching documents">
+      
+        <meta name="lang:search.result.one" content="1 matching document">
+      
+        <meta name="lang:search.result.other" content="# matching documents">
+      
+        <meta name="lang:search.tokenizer" content="[\s\-]+">
+      
+      <link rel="shortcut icon" href="../assets/images/favicon.png">
+      <meta name="generator" content="mkdocs-0.17.2, mkdocs-material-2.2.5">
+    
+    
+      
+        <title>Delete - Yq</title>
+      
+    
+    
+      <link rel="stylesheet" href="../assets/stylesheets/application.bcabdff3.css">
+      
+    
+    
+      <script src="../assets/javascripts/modernizr.1aa3b519.js"></script>
+    
+    
+      
+        <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>
+        
+        
+          <svg xmlns="http://www.w3.org/2000/svg" width="416" height="448" viewBox="0 0 416 448" id="github"><path fill="currentColor" d="M160 304q0 10-3.125 20.5t-10.75 19T128 352t-18.125-8.5-10.75-19T96 304t3.125-20.5 10.75-19T128 256t18.125 8.5 10.75 19T160 304zm160 0q0 10-3.125 20.5t-10.75 19T288 352t-18.125-8.5-10.75-19T256 304t3.125-20.5 10.75-19T288 256t18.125 8.5 10.75 19T320 304zm40 0q0-30-17.25-51T296 232q-10.25 0-48.75 5.25Q229.5 240 208 240t-39.25-2.75Q130.75 232 120 232q-29.5 0-46.75 21T56 304q0 22 8 38.375t20.25 25.75 30.5 15 35 7.375 37.25 1.75h42q20.5 0 37.25-1.75t35-7.375 30.5-15 20.25-25.75T360 304zm56-44q0 51.75-15.25 82.75-9.5 19.25-26.375 33.25t-35.25 21.5-42.5 11.875-42.875 5.5T212 416q-19.5 0-35.5-.75t-36.875-3.125-38.125-7.5-34.25-12.875T37 371.5t-21.5-28.75Q0 312 0 260q0-59.25 34-99-6.75-20.5-6.75-42.5 0-29 12.75-54.5 27 0 47.5 9.875t47.25 30.875Q171.5 96 212 96q37 0 70 8 26.25-20.5 46.75-30.25T376 64q12.75 25.5 12.75 54.5 0 21.75-6.75 42 34 40 34 99.5z"/></svg>
+        
+      </defs>
+    </svg>
+    <input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="drawer">
+    <input class="md-toggle" data-md-toggle="search" type="checkbox" id="search">
+    <label class="md-overlay" data-md-component="overlay" for="drawer"></label>
+    
+      <header class="md-header" data-md-component="header">
+  <nav class="md-header-nav md-grid">
+    <div class="md-flex">
+      <div class="md-flex__cell md-flex__cell--shrink">
+        <a href=".." title="Yq" class="md-header-nav__button md-logo">
+          
+            <i class="md-icon"></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>
+      </div>
+      <div class="md-flex__cell md-flex__cell--stretch">
+        <div class="md-flex__ellipsis md-header-nav__title" data-md-component="title">
+          
+            
+              <span class="md-header-nav__topic">
+                Yq
+              </span>
+              <span class="md-header-nav__topic">
+                Delete
+              </span>
+            
+          
+        </div>
+      </div>
+      <div class="md-flex__cell md-flex__cell--shrink">
+        
+          
+            <label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
+            
+<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" 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">&#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__meta">
+            Type to start searching
+          </div>
+          <ol class="md-search-result__list"></ol>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+          
+        
+      </div>
+      
+        <div class="md-flex__cell md-flex__cell--shrink">
+          <div class="md-header-nav__source">
+            
+
+
+  
+
+
+  <a href="https://github.com/mikefarah/yq/" title="Go to repository" class="md-source" data-md-source="github">
+    
+      <div class="md-source__icon">
+        <svg viewBox="0 0 24 24" width="24" height="24">
+          <use xlink:href="#github" width="24" height="24"></use>
+        </svg>
+      </div>
+    
+    <div class="md-source__repository">
+      mikefarah/yq
+    </div>
+  </a>
+
+          </div>
+        </div>
+      
+    </div>
+  </nav>
+</header>
+    
+    <div class="md-container">
+      
+        
+      
+      
+      <main class="md-main">
+        <div class="md-main__inner md-grid" data-md-component="container">
+          
+            
+              <div class="md-sidebar md-sidebar--primary" data-md-component="navigation">
+                <div class="md-sidebar__scrollwrap">
+                  <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">
+    <span class="md-nav__button md-logo">
+      
+        <i class="md-icon"></i>
+      
+    </span>
+    Yq
+  </label>
+  
+    <div class="md-nav__source">
+      
+
+
+  
+
+
+  <a href="https://github.com/mikefarah/yq/" title="Go to repository" class="md-source" data-md-source="github">
+    
+      <div class="md-source__icon">
+        <svg viewBox="0 0 24 24" width="24" height="24">
+          <use xlink:href="#github" width="24" height="24"></use>
+        </svg>
+      </div>
+    
+    <div class="md-source__repository">
+      mikefarah/yq
+    </div>
+  </a>
+
+    </div>
+  
+  <ul class="md-nav__list" data-md-scrollfix>
+    
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href=".." title="Install" class="md-nav__link">
+      Install
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../read/" title="Read" class="md-nav__link">
+      Read
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../write/" title="Write/Update" class="md-nav__link">
+      Write/Update
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+  
+
+
+  <li class="md-nav__item md-nav__item--active">
+    
+    <input class="md-toggle md-nav__toggle" data-md-toggle="toc" type="checkbox" id="toc">
+    
+    
+      <label class="md-nav__link md-nav__link--active" for="toc">
+        Delete
+      </label>
+    
+    <a href="./" title="Delete" class="md-nav__link md-nav__link--active">
+      Delete
+    </a>
+    
+      
+<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="#from-stdin" title="From STDIN" class="md-nav__link">
+    From STDIN
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#deleting-array-elements" title="Deleting array elements" class="md-nav__link">
+    Deleting array elements
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#deleting-nodes-in-place" title="Deleting nodes in-place" class="md-nav__link">
+    Deleting nodes in-place
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#keys-with-dots" title="Keys with dots" class="md-nav__link">
+    Keys with dots
+  </a>
+  
+</li>
+      
+      
+      
+    </ul>
+  
+</nav>
+    
+  </li>
+
+    
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../create/" title="Create" class="md-nav__link">
+      Create
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../convert/" title="Convert" class="md-nav__link">
+      Convert
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
+  <li class="md-nav__item">
+    <a href="../merge/" title="Merge" class="md-nav__link">
+      Merge
+    </a>
+  </li>
+
+    
+  </ul>
+</nav>
+                  </div>
+                </div>
+              </div>
+            
+            
+              <div class="md-sidebar md-sidebar--secondary" data-md-component="toc">
+                <div class="md-sidebar__scrollwrap">
+                  <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="#from-stdin" title="From STDIN" class="md-nav__link">
+    From STDIN
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#deleting-array-elements" title="Deleting array elements" class="md-nav__link">
+    Deleting array elements
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#deleting-nodes-in-place" title="Deleting nodes in-place" class="md-nav__link">
+    Deleting nodes in-place
+  </a>
+  
+</li>
+      
+        <li class="md-nav__item">
+  <a href="#keys-with-dots" title="Keys with dots" class="md-nav__link">
+    Keys with dots
+  </a>
+  
+</li>
+      
+      
+      
+    </ul>
+  
+</nav>
+                  </div>
+                </div>
+              </div>
+            
+          
+          <div class="md-content">
+            <article class="md-content__inner md-typeset">
+              
+                
+                  <a href="https://github.com/mikefarah/yq/edit/master/docs/delete.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
+                
+                
+                  <h1>Delete</h1>
+                
+                <pre><code>yq d &lt;yaml_file|json_file&gt; &lt;path_to_delete&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 sample.yaml file of:</p>
+<pre><code class="yaml">b:
+  c: 2
+  apples: green
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yq d sample.yaml b.c
+</code></pre>
+
+<p>will output:</p>
+<pre><code class="yaml">b:
+  apples: green
+</code></pre>
+
+<h3 id="from-stdin">From STDIN<a class="headerlink" href="#from-stdin" title="Permanent link">&para;</a></h3>
+<pre><code class="bash">cat sample.yaml | yq d - b.c
+</code></pre>
+
+<h3 id="deleting-array-elements">Deleting array elements<a class="headerlink" href="#deleting-array-elements" title="Permanent link">&para;</a></h3>
+<p>Given a sample.yaml file of:</p>
+<pre><code class="yaml">b:
+  c: 
+    - 1
+    - 2
+    - 3
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yq d sample.yaml 'b.c[1]'
+</code></pre>
+
+<p>will output:</p>
+<pre><code class="yaml">b:
+  c:
+  - 1
+  - 3
+</code></pre>
+
+<h3 id="deleting-nodes-in-place">Deleting nodes in-place<a class="headerlink" href="#deleting-nodes-in-place" title="Permanent link">&para;</a></h3>
+<p>Given a sample.yaml file of:</p>
+<pre><code class="yaml">b:
+  c: 2
+  apples: green
+</code></pre>
+
+<p>then</p>
+<pre><code class="bash">yq d -i sample.yaml b.c
+</code></pre>
+
+<p>will update the sample.yaml file so that the 'c' node is deleted</p>
+<h3 id="keys-with-dots">Keys with dots<a class="headerlink" href="#keys-with-dots" title="Permanent link">&para;</a></h3>
+<p>When specifying a key that has a dot use key lookup indicator.</p>
+<pre><code class="yaml">b:
+  foo.bar: 7
+</code></pre>
+
+<pre><code class="bash">yaml r sample.yaml 'b[foo.bar]'
+</code></pre>
+
+<pre><code class="bash">yaml w sample.yaml 'b[foo.bar]' 9
+</code></pre>
+
+<p>Any valid yaml key can be specified as part of a key lookup.</p>
+<p>Note that the path is in quotes to avoid the square brackets being interpreted by your shell.</p>
+                
+                  
+                
+              
+              
+                
+              
+            </article>
+          </div>
+        </div>
+      </main>
+      
+        
+<footer class="md-footer">
+  
+    <div class="md-footer-nav">
+      <nav class="md-footer-nav__inner md-grid">
+        
+          <a href="../write/" title="Write/Update" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev">
+            <div class="md-flex__cell md-flex__cell--shrink">
+              <i class="md-icon md-icon--arrow-back md-footer-nav__button"></i>
+            </div>
+            <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title">
+              <span class="md-flex__ellipsis">
+                <span class="md-footer-nav__direction">
+                  Previous
+                </span>
+                Write/Update
+              </span>
+            </div>
+          </a>
+        
+        
+          <a href="../create/" title="Create" 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>
+                Create
+              </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>
+  
+  <div class="md-footer-meta md-typeset">
+    <div class="md-footer-meta__inner md-grid">
+      <div class="md-footer-copyright">
+        
+        powered by
+        <a href="http://www.mkdocs.org">MkDocs</a>
+        and
+        <a href="https://squidfunk.github.io/mkdocs-material/">
+          Material for MkDocs</a>
+      </div>
+      
+        
+  <div class="md-footer-social">
+    
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
+    
+      <a href="https://github.com/mikefarah" class="md-footer-social__link fa fa-github"></a>
+    
+      <a href="https://www.linkedin.com/in/mike-farah-b5a75b2/" class="md-footer-social__link fa fa-linkedin"></a>
+    
+  </div>
+
+      
+    </div>
+  </div>
+</footer>
+      
+    </div>
+    
+      <script src="../assets/javascripts/application.6cdc17f0.js"></script>
+      
+      <script>app.initialize({version:"0.17.2",url:{base:".."}})</script>
+      
+    
+    
+      
+    
+  </body>
+</html>

docs/index.html

@@ -274,6 +274,18 @@
       
 
 
+  <li class="md-nav__item">
+    <a href="delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
   <li class="md-nav__item">
     <a href="create/" title="Create" class="md-nav__link">
       Create

docs/merge/index.html

@@ -238,6 +238,18 @@
       
 
 
+  <li class="md-nav__item">
+    <a href="../delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
   <li class="md-nav__item">
     <a href="../create/" title="Create" class="md-nav__link">
       Create

docs/read/index.html

@@ -256,13 +256,6 @@
     Splat
   </a>
   
-</li>
-      
-        <li class="md-nav__item">
-  <a href="#handling-in-the-yaml-key" title="Handling '.' in the yaml key" class="md-nav__link">
-    Handling '.' in the yaml key
-  </a>
-  
 </li>
       
         <li class="md-nav__item">
@@ -312,6 +305,18 @@
       
 
 
+  <li class="md-nav__item">
+    <a href="../delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
   <li class="md-nav__item">
     <a href="../create/" title="Create" class="md-nav__link">
       Create
@@ -380,13 +385,6 @@
     Splat
   </a>
   
-</li>
-      
-        <li class="md-nav__item">
-  <a href="#handling-in-the-yaml-key" title="Handling '.' in the yaml key" class="md-nav__link">
-    Handling '.' in the yaml key
-  </a>
-  
 </li>
       
         <li class="md-nav__item">
@@ -469,17 +467,6 @@ bob:
 - apples
 </code></pre>
 
-<h3 id="handling-in-the-yaml-key">Handling '.' in the yaml key<a class="headerlink" href="#handling-in-the-yaml-key" title="Permanent link">&para;</a></h3>
-<p>Given a sample.yaml file of:</p>
-<pre><code class="yaml">b.x:
-  c: 2
-</code></pre>
-
-<p>then</p>
-<pre><code class="bash">yq r sample.yaml \&quot;b.x\&quot;.c
-</code></pre>
-
-<p>will output the value of '2'.</p>
 <h3 id="arrays">Arrays<a class="headerlink" href="#arrays" title="Permanent link">&para;</a></h3>
 <p>You can give an index to access a specific element:
 e.g.: given a sample file of</p>

docs/search/search_index.json

@@ -17,7 +17,7 @@
         },
         {
             "location": "/read/",
-            "text": "yq r <yaml_file|json_file> <path>\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\nBasic\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyq r sample.yaml b.c\n\n\n\n\nwill output the value of '2'.\n\n\nFrom Stdin\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\ncat sample.yaml | yq r - b.c\n\n\n\n\nwill output the value of '2'.\n\n\nSplat\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\n---\nbob:\n  item1:\n    cats: bananas\n  item2:\n    cats: apples\n\n\n\n\nthen\n\n\nyq r sample.yaml bob.*.cats\n\n\n\n\nwill output\n\n\n- bananas\n- apples\n\n\n\n\nHandling '.' in the yaml key\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\nb.x:\n  c: 2\n\n\n\n\nthen\n\n\nyq r sample.yaml \\\"b.x\\\".c\n\n\n\n\nwill output the value of '2'.\n\n\nArrays\n\u00b6\n\n\nYou can give an index to access a specific element:\ne.g.: given a sample file of\n\n\nb:\n  e:\n    - name: fred\n      value: 3\n    - name: sam\n      value: 4\n\n\n\n\nthen\n\n\nyq r sample.yaml 'b.e[1].name'\n\n\n\n\nwill output 'sam'\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.\n\n\nArray Splat\n\u00b6\n\n\ne.g.: given a sample file of\n\n\nb:\n  e:\n    - name: fred\n      value: 3\n    - name: sam\n      value: 4\n\n\n\n\nthen\n\n\nyq r sample.yaml 'b.e[*].name'\n\n\n\n\nwill output:\n\n\n- fred\n- sam\n\n\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.\n\n\nKeys with dots\n\u00b6\n\n\nWhen specifying a key that has a dot use key lookup indicator.\n\n\nb:\n  foo.bar: 7\n\n\n\n\nyaml r sample.yaml 'b[foo.bar]'\n\n\n\n\nyaml w sample.yaml 'b[foo.bar]' 9\n\n\n\n\nAny valid yaml key can be specified as part of a key lookup.\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.",
+            "text": "yq r <yaml_file|json_file> <path>\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\nBasic\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n\n\n\n\nthen\n\n\nyq r sample.yaml b.c\n\n\n\n\nwill output the value of '2'.\n\n\nFrom Stdin\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\ncat sample.yaml | yq r - b.c\n\n\n\n\nwill output the value of '2'.\n\n\nSplat\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\n---\nbob:\n  item1:\n    cats: bananas\n  item2:\n    cats: apples\n\n\n\n\nthen\n\n\nyq r sample.yaml bob.*.cats\n\n\n\n\nwill output\n\n\n- bananas\n- apples\n\n\n\n\nArrays\n\u00b6\n\n\nYou can give an index to access a specific element:\ne.g.: given a sample file of\n\n\nb:\n  e:\n    - name: fred\n      value: 3\n    - name: sam\n      value: 4\n\n\n\n\nthen\n\n\nyq r sample.yaml 'b.e[1].name'\n\n\n\n\nwill output 'sam'\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.\n\n\nArray Splat\n\u00b6\n\n\ne.g.: given a sample file of\n\n\nb:\n  e:\n    - name: fred\n      value: 3\n    - name: sam\n      value: 4\n\n\n\n\nthen\n\n\nyq r sample.yaml 'b.e[*].name'\n\n\n\n\nwill output:\n\n\n- fred\n- sam\n\n\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.\n\n\nKeys with dots\n\u00b6\n\n\nWhen specifying a key that has a dot use key lookup indicator.\n\n\nb:\n  foo.bar: 7\n\n\n\n\nyaml r sample.yaml 'b[foo.bar]'\n\n\n\n\nyaml w sample.yaml 'b[foo.bar]' 9\n\n\n\n\nAny valid yaml key can be specified as part of a key lookup.\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.",
             "title": "Read"
         },
         {
@@ -35,11 +35,6 @@
             "text": "Given a sample.yaml file of:  ---\nbob:\n  item1:\n    cats: bananas\n  item2:\n    cats: apples  then  yq r sample.yaml bob.*.cats  will output  - bananas\n- apples",
             "title": "Splat"
         },
-        {
-            "location": "/read/#handling-in-the-yaml-key",
-            "text": "Given a sample.yaml file of:  b.x:\n  c: 2  then  yq r sample.yaml \\\"b.x\\\".c  will output the value of '2'.",
-            "title": "Handling '.' in the yaml key"
-        },
         {
             "location": "/read/#arrays",
             "text": "You can give an index to access a specific element:\ne.g.: given a sample file of  b:\n  e:\n    - name: fred\n      value: 3\n    - name: sam\n      value: 4  then  yq r sample.yaml 'b.e[1].name'  will output 'sam'  Note that the path is in quotes to avoid the square brackets being interpreted by your shell.",
@@ -100,6 +95,36 @@
             "text": "When specifying a key that has a dot use key lookup indicator.  b:\n  foo.bar: 7  yaml r sample.yaml 'b[foo.bar]'  yaml w sample.yaml 'b[foo.bar]' 9  Any valid yaml key can be specified as part of a key lookup.  Note that the path is in quotes to avoid the square brackets being interpreted by your shell.",
             "title": "Keys with dots"
         },
+        {
+            "location": "/delete/",
+            "text": "yq d <yaml_file|json_file> <path_to_delete>\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\u00b6\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n  apples: green\n\n\n\n\nthen\n\n\nyq d sample.yaml b.c\n\n\n\n\nwill output:\n\n\nb:\n  apples: green\n\n\n\n\nFrom STDIN\n\u00b6\n\n\ncat sample.yaml | yq d - b.c\n\n\n\n\nDeleting array elements\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: \n    - 1\n    - 2\n    - 3\n\n\n\n\nthen\n\n\nyq d sample.yaml 'b.c[1]'\n\n\n\n\nwill output:\n\n\nb:\n  c:\n  - 1\n  - 3\n\n\n\n\nDeleting nodes in-place\n\u00b6\n\n\nGiven a sample.yaml file of:\n\n\nb:\n  c: 2\n  apples: green\n\n\n\n\nthen\n\n\nyq d -i sample.yaml b.c\n\n\n\n\nwill update the sample.yaml file so that the 'c' node is deleted\n\n\nKeys with dots\n\u00b6\n\n\nWhen specifying a key that has a dot use key lookup indicator.\n\n\nb:\n  foo.bar: 7\n\n\n\n\nyaml r sample.yaml 'b[foo.bar]'\n\n\n\n\nyaml w sample.yaml 'b[foo.bar]' 9\n\n\n\n\nAny valid yaml key can be specified as part of a key lookup.\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.",
+            "title": "Delete"
+        },
+        {
+            "location": "/delete/#to-stdout",
+            "text": "Given a sample.yaml file of:  b:\n  c: 2\n  apples: green  then  yq d sample.yaml b.c  will output:  b:\n  apples: green",
+            "title": "To Stdout"
+        },
+        {
+            "location": "/delete/#from-stdin",
+            "text": "cat sample.yaml | yq d - b.c",
+            "title": "From STDIN"
+        },
+        {
+            "location": "/delete/#deleting-array-elements",
+            "text": "Given a sample.yaml file of:  b:\n  c: \n    - 1\n    - 2\n    - 3  then  yq d sample.yaml 'b.c[1]'  will output:  b:\n  c:\n  - 1\n  - 3",
+            "title": "Deleting array elements"
+        },
+        {
+            "location": "/delete/#deleting-nodes-in-place",
+            "text": "Given a sample.yaml file of:  b:\n  c: 2\n  apples: green  then  yq d -i sample.yaml b.c  will update the sample.yaml file so that the 'c' node is deleted",
+            "title": "Deleting nodes in-place"
+        },
+        {
+            "location": "/delete/#keys-with-dots",
+            "text": "When specifying a key that has a dot use key lookup indicator.  b:\n  foo.bar: 7  yaml r sample.yaml 'b[foo.bar]'  yaml w sample.yaml 'b[foo.bar]' 9  Any valid yaml key can be specified as part of a key lookup.  Note that the path is in quotes to avoid the square brackets being interpreted by your shell.",
+            "title": "Keys with dots"
+        },
         {
             "location": "/create/",
             "text": "Yaml files can be created using the 'new' command. This works in the same way as the write command, but you don't pass in an existing Yaml file.\n\n\nyq n <path> <new value>\n\n\n\n\nCreating a simple yaml file\n\u00b6\n\n\nyq n b.c cat\n\n\n\n\nwill output:\n\n\nb:\n  c: cat\n\n\n\n\nCreating using a create script\n\u00b6\n\n\nCreate scripts follow the same format as the update scripts.\n\n\nGiven a script create_instructions.yaml of:\n\n\nb.c: 3\nb.e[0].name: Howdy Partner\n\n\n\n\nthen\n\n\nyq n -s create_instructions.yaml\n\n\n\n\nwill output:\n\n\nb:\n  c: 3\n  e:\n    - name: Howdy Partner\n\n\n\n\nYou can also pipe the instructions in:\n\n\ncat create_instructions.yaml | yq n -s -\n\n\n\n\nKeys with dots\n\u00b6\n\n\nWhen specifying a key that has a dot use key lookup indicator.\n\n\nb:\n  foo.bar: 7\n\n\n\n\nyaml r sample.yaml 'b[foo.bar]'\n\n\n\n\nyaml w sample.yaml 'b[foo.bar]' 9\n\n\n\n\nAny valid yaml key can be specified as part of a key lookup.\n\n\nNote that the path is in quotes to avoid the square brackets being interpreted by your shell.",

docs/sitemap.xml

@@ -4,7 +4,7 @@
     
     <url>
      <loc>/</loc>
-     <lastmod>2018-02-28</lastmod>
+     <lastmod>2018-05-07</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -12,7 +12,7 @@
     
     <url>
      <loc>/read/</loc>
-     <lastmod>2018-02-28</lastmod>
+     <lastmod>2018-05-07</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -20,7 +20,15 @@
     
     <url>
      <loc>/write/</loc>
-     <lastmod>2018-02-28</lastmod>
+     <lastmod>2018-05-07</lastmod>
+     <changefreq>daily</changefreq>
+    </url>
+    
+
+    
+    <url>
+     <loc>/delete/</loc>
+     <lastmod>2018-05-07</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -28,7 +36,7 @@
     
     <url>
      <loc>/create/</loc>
-     <lastmod>2018-02-28</lastmod>
+     <lastmod>2018-05-07</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -36,7 +44,7 @@
     
     <url>
      <loc>/convert/</loc>
-     <lastmod>2018-02-28</lastmod>
+     <lastmod>2018-05-07</lastmod>
      <changefreq>daily</changefreq>
     </url>
     
@@ -44,7 +52,7 @@
     
     <url>
      <loc>/merge/</loc>
-     <lastmod>2018-02-28</lastmod>
+     <lastmod>2018-05-07</lastmod>
      <changefreq>daily</changefreq>
     </url>
     

docs/write/index.html

@@ -319,6 +319,18 @@
       
 
 
+  <li class="md-nav__item">
+    <a href="../delete/" title="Delete" class="md-nav__link">
+      Delete
+    </a>
+  </li>
+
+    
+      
+      
+      
+
+
   <li class="md-nav__item">
     <a href="../create/" title="Create" class="md-nav__link">
       Create
@@ -603,13 +615,13 @@ b.e[0].name: Howdy Partner
           </a>
         
         
-          <a href="../create/" title="Create" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel="next">
+          <a href="../delete/" title="Delete" 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>
-                Create
+                Delete
               </span>
             </div>
             <div class="md-flex__cell md-flex__cell--shrink">

mkdocs.yml

@@ -6,6 +6,7 @@ pages:
     - Install: index.md
     - Read: read.md
     - Write/Update: write.md
+    - Delete: delete.md
     - Create: create.md
     - Convert: convert.md
     - Merge: merge.md

mkdocs/delete.md

@@ -0,0 +1,63 @@
+```
+yq d <yaml_file|json_file> <path_to_delete>
+```
+{!snippets/works_with_json.md!}
+
+### To Stdout
+Given a sample.yaml file of:
+```yaml
+b:
+  c: 2
+  apples: green
+```
+then
+```bash
+yq d sample.yaml b.c
+```
+will output:
+```yaml
+b:
+  apples: green
+```
+
+### From STDIN
+```bash
+cat sample.yaml | yq d - b.c
+```
+
+### Deleting array elements
+Given a sample.yaml file of:
+```yaml
+b:
+  c: 
+    - 1
+    - 2
+    - 3
+```
+then
+```bash
+yq d sample.yaml 'b.c[1]'
+```
+will output:
+```yaml
+b:
+  c:
+  - 1
+  - 3
+```
+
+### Deleting nodes in-place
+Given a sample.yaml file of:
+```yaml
+b:
+  c: 2
+  apples: green
+```
+then
+```bash
+yq d -i sample.yaml b.c
+```
+will update the sample.yaml file so that the 'c' node is deleted
+
+
+{!snippets/keys_with_dots.md!}

mkdocs/read.md

@@ -43,18 +43,6 @@ will output
 - apples
 ```
 
-### Handling '.' in the yaml key
-Given a sample.yaml file of:
-```yaml
-b.x:
-  c: 2
-```
-then
-```bash
-yq r sample.yaml \"b.x\".c
-```
-will output the value of '2'.
-
 ### Arrays
 You can give an index to access a specific element:
 e.g.: given a sample file of

scripts/publish.sh

@@ -5,7 +5,7 @@ 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"
+REPO="yq"
 
 release() {
     mapfile -t logs < <(git log --pretty=oneline --abbrev-commit "${PREVIOUS}".."${CURRENT}")

utils_test.go

@@ -41,19 +41,21 @@ func parseData(rawData string) yaml.MapSlice {
 }
 
 func assertResult(t *testing.T, expectedValue interface{}, actualValue interface{}) {
+	t.Helper()
 	if expectedValue != actualValue {
 		t.Error("Expected <", expectedValue, "> but got <", actualValue, ">", fmt.Sprintf("%T", actualValue))
 	}
 }
 
 func assertResultComplex(t *testing.T, expectedValue interface{}, actualValue interface{}) {
+	t.Helper()
 	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{}) {
-
+	t.Helper()
 	if expectedValue != actualValue {
 		t.Error(context)
 		t.Error(": expected <", expectedValue, "> but got <", actualValue, ">")

version.go

@@ -11,7 +11,7 @@ var (
 	GitDescribe string
 
 	// Version is main version number that is being run at the moment.
-	Version = "1.14.1"
+	Version = "1.15.0"
 
 	// 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
@@ -20,7 +20,7 @@ var (
 )
 
 // ProductName is the name of the product
-const ProductName = "yaml"
+const ProductName = "yq"
 
 // GetVersionDisplay composes the parts of the version in a way that's suitable
 // for displaying to humans.

yq.go

@@ -64,7 +64,13 @@ func newCommandCLI() *cobra.Command {
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose mode")
 	rootCmd.Flags().BoolVarP(&version, "version", "V", false, "Print version information and quit")
 
-	rootCmd.AddCommand(createReadCmd(), createWriteCmd(), createNewCmd(), createMergeCmd())
+	rootCmd.AddCommand(
+		createReadCmd(),
+		createWriteCmd(),
+		createDeleteCmd(),
+		createNewCmd(),
+		createMergeCmd(),
+	)
 	rootCmd.SetOutput(os.Stdout)
 
 	return rootCmd
@@ -121,6 +127,26 @@ a.b.e:
 	return cmdWrite
 }
 
+func createDeleteCmd() *cobra.Command {
+	var cmdDelete = &cobra.Command{
+		Use:     "delete [yaml_file] [path]",
+		Aliases: []string{"d"},
+		Short:   "yq d [--inplace/-i] sample.yaml a.b.c",
+		Example: `
+yq delete things.yaml a.b.c
+yq delete --inplace things.yaml a.b.c
+yq d -i things.yaml a.b.c
+yq d things.yaml a.b.c
+	`,
+		Long: `Deletes the given path from the YAML file.
+Outputs to STDOUT unless the inplace flag is used, in which case the file is updated instead.
+`,
+		RunE: deleteProperty,
+	}
+	cmdDelete.PersistentFlags().BoolVarP(&writeInplace, "inplace", "i", false, "update the yaml file inplace")
+	return cmdDelete
+}
+
 func createNewCmd() *cobra.Command {
 	var cmdNew = &cobra.Command{
 		Use:     "new [path] [value]",
@@ -316,6 +342,38 @@ func write(cmd *cobra.Command, filename string, updatedData interface{}) error {
 	return nil
 }
 
+func deleteProperty(cmd *cobra.Command, args []string) error {
+	updatedData, err := deleteYaml(args)
+	if err != nil {
+		return err
+	}
+	return write(cmd, args[0], updatedData)
+}
+
+func deleteYaml(args []string) (interface{}, error) {
+	var parsedData yaml.MapSlice
+	var deletePath string
+
+	if len(args) < 2 {
+		return nil, errors.New("Must provide <filename> <path_to_delete>")
+	}
+
+	deletePath = args[1]
+
+	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}
+		deletePath = "thing." + deletePath
+	}
+
+	path := parsePath(deletePath)
+	return deleteMap(parsedData, path), nil
+}
+
 func mergeProperties(cmd *cobra.Command, args []string) error {
 	if len(args) < 2 {
 		return errors.New("Must provide at least 2 yaml files")

yq_test.go

@@ -122,3 +122,11 @@ func TestNewYaml_WithUnknownScript(t *testing.T) {
 	expectedOutput := `open fake-unknown: no such file or directory`
 	assertResult(t, expectedOutput, err.Error())
 }
+
+func TestDeleteYaml(t *testing.T) {
+	result, _ := deleteYaml([]string{"examples/sample.yaml", "b.c"})
+	formattedResult := fmt.Sprintf("%v", result)
+	assertResult(t,
+		"[{a Easy! as one two three} {b [{d [3 4]} {e [[{name fred} {value 3}] [{name sam} {value 4}]]}]}]",
+		formattedResult)
+}