[config] add config:export --format shell

plugins/config/src/configenv/configenv.go

@@ -16,12 +16,18 @@ import (
 	common "github.com/dokku/dokku/plugins/common"
 )
 
+//ExportFormat types of possible exports
 type ExportFormat int
 
 const (
+	//Exports format: Sourceable exports
 	Exports ExportFormat = iota
+	//Envfile format: dotenv file
 	Envfile
+	//DockerArgs format: --env args for docker
 	DockerArgs
+	//Shell format: env arguments for shell
+	Shell
 )
 
 //Env is a representation for global or app environment
@@ -35,6 +41,7 @@ func (e *Env) String() string {
 	return e.EnvfileString()
 }
 
+//Export the Env in the given format
 func (e *Env) Export(format ExportFormat) string {
 	switch format {
 	case Exports:
@@ -43,6 +50,8 @@ func (e *Env) Export(format ExportFormat) string {
 		return e.EnvfileString()
 	case DockerArgs:
 		return e.DockerArgsString()
+	case Shell:
+		return e.ShellString()
 	default:
 		common.LogFail(fmt.Sprintf("Unknown export format: %v", format))
 		return ""
@@ -65,6 +74,12 @@ func (e *Env) DockerArgsString() string {
 	return e.stringWithPrefixAndSeparator("--env=", " ", true)
 }
 
+//ShellString gets the contents of this Env in the form "KEY='value' KEY2='value'"
+// for passing the environment in the shell
+func (e *Env) ShellString() string {
+	return e.stringWithPrefixAndSeparator("", " ", true)
+}
+
 //StringWithPrefixAndSeparator makes a string of the environment
 // with the given prefix and separator for each entry
 func (e *Env) stringWithPrefixAndSeparator(prefix string, separator string, allowNewlines bool) string {

plugins/config/src/configenv/configenv_test.go

@@ -50,6 +50,7 @@ func TestArrayExport(t *testing.T) {
 	e, _ := NewFromString("BAR='BAZ'\nFOO='b'ar '")
 	Expect(e.EnvfileString()).To(Equal("BAR=\"BAZ\"\nFOO=\"b'ar \""))
 	Expect(e.DockerArgsString()).To(Equal("--env=BAR='BAZ' --env=FOO='b'\\''ar '"))
+	Expect(e.ShellString()).To(Equal("BAR='BAZ' FOO='b'\\''ar '"))
 }
 
 func pairs(vars ...string) map[string]string {

plugins/config/src/subcommands/export/export.go

@@ -17,7 +17,7 @@ func main() {
 	args := flag.NewFlagSet("config:export", flag.ExitOnError)
 	global := args.Bool("global", false, "--global: use the global environment")
 	merged := args.Bool("merged", false, "--merged: merge app environment and global environment")
-	format := args.String("format", "exports", "--format: [ exports | envfile | docker-args ] which format to export as)")
+	format := args.String("format", "exports", "--format: [ exports | envfile | docker-args | shell ] which format to export as)")
 	args.Parse(os.Args[2:])
 
 	appName, trailingArgs := config.GetCommonArgs(*global, args.Args())
@@ -27,6 +27,7 @@ func main() {
 
 	env := config.GetConfig(appName, *merged)
 	exportType := configenv.Exports
+	suffix := "\n"
 	switch *format {
 	case "exports":
 		exportType = configenv.Exports
@@ -34,9 +35,12 @@ func main() {
 		exportType = configenv.Envfile
 	case "docker-args":
 		exportType = configenv.DockerArgs
+	case "shell":
+		exportType = configenv.Shell
+		suffix = " "
 	default:
 		common.LogFail(fmt.Sprintf("Unknown export format: %v", *format))
 	}
 	exported := env.Export(exportType)
-	fmt.Println(exported)
+	fmt.Print(exported + suffix)
 }