Exist status 1 i anything is modified and --modified-exit

indent
```yaml
    Makefile:
      prefix: "#"
      indent: "***" # generates #***text
    .yml:
      prefix: "#"  # generates # text
    Dockerfile*:
      prefix: "#"
      indent: "NO_INDENT" # generates #text
```

exit code

modified status

cmd/inject.go

@@ -44,11 +44,13 @@ var injectCmd = &cobra.Command{
 			os.Exit(0)
 		}
 		i := inject.New(ctx, injectOptions)
-		Command(i).MustRun()
+		exitCode = Command(i).MustRun()
 	},
 }
 
 func init() {
+	injectCmd.Flags().BoolVarP(&injectOptions.ModifiedExitStatus, "modified-exit", "x", false,
+		"If enabled, exits with status 1 when any file is modified. The settings is used by CI")
 	injectCmd.Flags().StringVarP(&injectOptions.LicIgnore, "licignore", "l", ".licignore", ".licignore path")
 	injectCmd.Flags().StringVarP(&injectOptions.Template, "template", "t", "apache2", "license key")
 	injectCmd.Flags().StringVarP(&injectOptions.Copyright, "copyright", "c", "2021 MyCompany",

cmd/root.go

@@ -35,6 +35,8 @@ var ctx = context.Background()
 
 var logger = log.Log
 
+var exitCode = 0
+
 var rootCmd = &cobra.Command{
 	Short: "golic license injector",
 	Long:  ``,
@@ -46,7 +48,12 @@ var rootCmd = &cobra.Command{
 		}
 	},
 	PersistentPostRun: func(cmd *cobra.Command, args []string) {
-		logger.Info().Msgf("done %3s%s%s", emoji.Rocket,emoji.Rocket,emoji.Rocket)
+		if exitCode == 0 {
+			logger.Info().Msgf("done %s%s%s", emoji.Rocket, emoji.Rocket, emoji.Rocket)
+		} else {
+			logger.Info().Msgf("done with changes %s", emoji.FaceScreamingInFear)
+		}
+		os.Exit(exitCode)
 	},
 }
 

cmd/runner.go

@@ -25,6 +25,7 @@ import (
 type Service interface {
 	Run() error
 	String() string
+	ExitCode() int
 }
 
 type ServiceRunner struct {
@@ -38,8 +39,9 @@ func Command(service Service) *ServiceRunner {
 }
 
 //Run service once and panics if service is broken
-func (r *ServiceRunner) MustRun() {
+func (r *ServiceRunner) MustRun() int {
 	logger.Info().Msgf("%s command %s started",emoji.Tractor, r.service)
 	err := r.service.Run()
 	guard.FailOnError(err, "command %s failed", r.service)
+	return r.service.ExitCode()
 }

cmd/version.go

@@ -1,3 +1,20 @@
+/*
+Copyright 2021 Absa Group Limited
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Generated by GoLic, for more details see: https://github.com/AbsaOSS/golic
+*/
 package cmd
 
 import (

impl/inject/config.go

@@ -21,9 +21,10 @@ type Config struct {
 	Golic struct{
 		Licenses map[string]string `yaml:"licenses"`
 		Rules    map[string]struct {
-			Prefix string `yaml:"prefix"`
-			Suffix string `yaml:"suffix"`
-			Under []string `yaml:"under"`
+			Prefix string   `yaml:"prefix"`
+			Suffix string   `yaml:"suffix"`
+			Under  []string `yaml:"under"`
+			Indent string   `yaml:"indent"` // if NO_INDENT value, than indent is ""
 		} `yaml:"rules"`
 	} `yaml:"golic"`
 }

impl/inject/inject.go

@@ -35,10 +35,11 @@ import (
 )
 
 type Inject struct {
-	opts   Options
-	ctx    context.Context
-	ignore gitignore.GitIgnore
-	cfg *Config
+	opts     Options
+	ctx      context.Context
+	ignore   gitignore.GitIgnore
+	cfg      *Config
+	modified int
 }
 
 var logger = log.Log
@@ -79,6 +80,13 @@ func (i *Inject) String() string {
 	return aurora.BrightCyan("inject").String()
 }
 
+func (i *Inject) ExitCode() int {
+	if i.opts.ModifiedExitStatus && i.modified != 0 {
+		return 1
+	}
+	return 0
+}
+
 func read(f string) (s string, err error) {
 	content, err := ioutil.ReadFile(f)
 	if err != nil {
@@ -118,6 +126,7 @@ func (i *Inject) traverse() {
 	if err != nil {
 		logger.Err(err).Msg("")
 	}
+	i.modified = visited - skipped
 	summary(skipped,visited)
 }
 
@@ -205,9 +214,16 @@ func getCommentedLicense(config *Config, o Options, file string) (string, error)
 			nil
 	}
 	// `\r\n` -> `\r\n #`, `\n` -> `\n #`
-	content := strings.ReplaceAll(template,"\n",fmt.Sprintf("\n%s ", config.Golic.Rules[rule].Prefix))
-	content = strings.TrimSuffix(content, config.Golic.Rules[rule].Prefix+" ")
-	content = config.Golic.Rules[rule].Prefix + " " + content
+	var indent string
+	switch config.Golic.Rules[rule].Indent {
+	case "NO_INDENT": indent = ""
+	case "":  indent = " "
+	default: indent = config.Golic.Rules[rule].Indent
+	}
+
+	content := strings.ReplaceAll(template,"\n",fmt.Sprintf("\n%s%s", config.Golic.Rules[rule].Prefix,indent))
+	content = strings.TrimSuffix(content, config.Golic.Rules[rule].Prefix+indent)
+	content = config.Golic.Rules[rule].Prefix + indent + content
 	// "# \n" -> "#\n" // "# \r\n" -> "#\r\n"; some environments automatically remove spaces in empty lines. This makes problems in license PR's
 	content = strings.ReplaceAll(content,fmt.Sprintf("%s \n",config.Golic.Rules[rule].Prefix),fmt.Sprintf("%s\n",config.Golic.Rules[rule].Prefix))
 	content = strings.ReplaceAll(content,fmt.Sprintf("%s \r\n",config.Golic.Rules[rule].Prefix),fmt.Sprintf("%s\r\n",config.Golic.Rules[rule].Prefix))

impl/inject/opts.go

@@ -24,4 +24,5 @@ type Options struct {
 	ConfigURL string
 	ConfigPath string
 	Template  string
+	ModifiedExitStatus bool
 }