Add writeToStdout init template function

cmd/executetemplatecmd.go

@@ -63,6 +63,7 @@ func (c *Config) runExecuteTemplateCmd(cmd *cobra.Command, args []string, source
 			"stdinIsATTY": func() bool {
 				return c.executeTemplate.stdinIsATTY
 			},
+			"writeToStdout": c.writeToStdout,
 		})
 	}
 

cmd/initcmd.go

@@ -251,10 +251,11 @@ func (c *Config) createConfigFile(filename chezmoi.RelPath, data []byte) ([]byte
 	funcMap := make(template.FuncMap)
 	chezmoi.RecursiveMerge(funcMap, c.templateFuncs)
 	chezmoi.RecursiveMerge(funcMap, map[string]interface{}{
-		"promptBool":   c.promptBool,
-		"promptInt":    c.promptInt,
-		"promptString": c.promptString,
-		"stdinIsATTY":  c.stdinIsATTY,
+		"promptBool":    c.promptBool,
+		"promptInt":     c.promptInt,
+		"promptString":  c.promptString,
+		"stdinIsATTY":   c.stdinIsATTY,
+		"writeToStdout": c.writeToStdout,
 	})
 
 	t, err := template.New(string(filename)).Funcs(funcMap).Parse(string(data))
@@ -308,6 +309,15 @@ func (c *Config) stdinIsATTY() bool {
 	return term.IsTerminal(int(file.Fd()))
 }
 
+func (c *Config) writeToStdout(args ...string) string {
+	for _, arg := range args {
+		if _, err := c.stdout.Write([]byte(arg)); err != nil {
+			panic(err)
+		}
+	}
+	return ""
+}
+
 // guessDotfilesRepoURL guesses the user's dotfile repo from arg.
 func guessDotfilesRepoURL(arg string) string {
 	for _, dotfileRepoGuess := range dotfilesRepoGuesses {

docs/REFERENCE.md

@@ -111,6 +111,7 @@ Manage your dotfiles securely across multiple machines.
   * [`stat` *name*](#stat-name)
   * [`stdinIsATTY`](#stdinisatty)
   * [`vault` *key*](#vault-key)
+  * [`writeToStdout` *string*...](#writetostdout-string)
 
 ## Concepts
 
@@ -1694,3 +1695,12 @@ times with the same *key* will only invoke `vault` once.
 #### `vault` examples
 
     {{ (vault "<key>").data.data.password }}
+
+### `writeToStdout` *string*...
+
+`writeToStdout` writes each *string* to stdout. It is only available when
+generating the initial config file.
+
+#### `writeToStdout` examples
+
+    {{- writeToStdout "Hello, world\n" -}}

testdata/scripts/templatefuncs.txt

@@ -40,6 +40,10 @@ stdout arg
 # test that the output template function fails if the command fails
 ! chezmoi execute-template '{{ output "false" }}'
 
+# test writeToStdout
+chezmoi execute-template --init '{{ writeToStdout "string" }}'
+stdout string
+
 -- bin/chezmoi-output-test --
 #!/bin/sh