can set indent levels

cmd/commands_test.go

@@ -439,6 +439,27 @@ b:
 	test.AssertResult(t, expectedOutput, result.Output)
 }
 
+func TestReadPrettyPrintWithIndentCmd(t *testing.T) {
+	cmd := getRootCommand()
+	result := test.RunCmd(cmd, "read -P -I4 ../examples/sample.json")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `a: Easy! as one two three
+b:
+    c: 2
+    d:
+      - 3
+      - 4
+    e:
+      - name: fred
+        value: 3
+      - name: sam
+        value: 4
+`
+	test.AssertResult(t, expectedOutput, result.Output)
+}
+
 func TestReadCmd_ArrayYaml_NoPath(t *testing.T) {
 	cmd := getRootCommand()
 	result := test.RunCmd(cmd, "read ../examples/array.yaml")
@@ -666,6 +687,34 @@ func TestReadToJsonPrettyCmd(t *testing.T) {
 	test.AssertResult(t, expectedOutput, result.Output)
 }
 
+func TestReadToJsonPrettyIndentCmd(t *testing.T) {
+	cmd := getRootCommand()
+	result := test.RunCmd(cmd, "read -j -I4 -P ../examples/sample.yaml b")
+	if result.Error != nil {
+		t.Error(result.Error)
+	}
+	expectedOutput := `{
+    "c": 2,
+    "d": [
+        3,
+        4,
+        5
+    ],
+    "e": [
+        {
+            "name": "fred",
+            "value": 3
+        },
+        {
+            "name": "sam",
+            "value": 4
+        }
+    ]
+}
+`
+	test.AssertResult(t, expectedOutput, result.Output)
+}
+
 func TestReadBadDataCmd(t *testing.T) {
 	content := `[!Whatever]`
 	filename := test.WriteTempYamlFile(content)

cmd/constant.go

@@ -12,6 +12,7 @@ var writeScript = ""
 var outputToJSON = false
 var prettyPrint = false
 var defaultValue = ""
+var indent = 2
 var overwriteFlag = false
 var autoCreateFlag = true
 var allowEmptyFlag = false

cmd/root.go

@@ -39,8 +39,9 @@ func New() *cobra.Command {
 	}
 
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose mode")
-	rootCmd.PersistentFlags().BoolVarP(&outputToJSON, "tojson", "j", false, "output as json")
+	rootCmd.PersistentFlags().BoolVarP(&outputToJSON, "tojson", "j", false, "output as json. By default it prints a json document in one line, use the prettyPrint flag to print a formatted doc.")
 	rootCmd.PersistentFlags().BoolVarP(&prettyPrint, "prettyPrint", "P", false, "pretty print")
+	rootCmd.PersistentFlags().IntVarP(&indent, "indent", "I", 2, "sets indent level for output")
 	rootCmd.Flags().BoolVarP(&version, "version", "V", false, "Print version information and quit")
 
 	rootCmd.AddCommand(

cmd/utils.go

@@ -76,9 +76,9 @@ func printValue(node *yaml.Node, writer io.Writer) error {
 func printNode(node *yaml.Node, writer io.Writer) error {
 	var encoder yqlib.Encoder
 	if outputToJSON {
-		encoder = yqlib.NewJsonEncoder(writer, prettyPrint)
+		encoder = yqlib.NewJsonEncoder(writer, prettyPrint, indent)
 	} else {
-		encoder = yqlib.NewYamlEncoder(writer)
+		encoder = yqlib.NewYamlEncoder(writer, indent)
 	}
 	return encoder.Encode(node)
 }
@@ -289,9 +289,9 @@ func readAndUpdate(stdOut io.Writer, inputFile string, updateData updateDataFn)
 
 	var encoder yqlib.Encoder
 	if outputToJSON {
-		encoder = yqlib.NewJsonEncoder(bufferedWriter, prettyPrint)
+		encoder = yqlib.NewJsonEncoder(bufferedWriter, prettyPrint, indent)
 	} else {
-		encoder = yqlib.NewYamlEncoder(bufferedWriter)
+		encoder = yqlib.NewYamlEncoder(bufferedWriter, indent)
 	}
 	return readStream(inputFile, mapYamlDecoder(updateData, encoder))
 }

pkg/yqlib/encoder.go

@@ -15,9 +15,12 @@ type yamlEncoder struct {
 	encoder *yaml.Encoder
 }
 
-func NewYamlEncoder(destination io.Writer) Encoder {
+func NewYamlEncoder(destination io.Writer, indent int) Encoder {
 	var encoder = yaml.NewEncoder(destination)
-	encoder.SetIndent(2)
+	if indent < 0 {
+		indent = 0
+	}
+	encoder.SetIndent(indent)
 	return &yamlEncoder{encoder}
 }
 
@@ -29,10 +32,15 @@ type jsonEncoder struct {
 	encoder *json.Encoder
 }
 
-func NewJsonEncoder(destination io.Writer, prettyPrint bool) Encoder {
+func NewJsonEncoder(destination io.Writer, prettyPrint bool, indent int) Encoder {
 	var encoder = json.NewEncoder(destination)
+	var indentString = ""
+
+	for index := 0; index < indent; index++ {
+		indentString = indentString + " "
+	}
 	if prettyPrint {
-		encoder.SetIndent("", " ")
+		encoder.SetIndent("", indentString)
 	}
 	return &jsonEncoder{encoder}
 }