feat: support --color/--no-color flag and NO_COLOR env var

jiracli/templates.go

@@ -67,6 +67,8 @@ func tmpTemplate(templateName string, data interface{}) (string, error) {
 }
 
 func TemplateProcessor() *template.Template {
+	noColor := len(os.Getenv("NO_COLOR")) > 0
+
 	funcs := map[string]interface{}{
 		"jira": func() string {
 			return os.Args[0]
@@ -151,6 +153,9 @@ func TemplateProcessor() *template.Template {
 			return content
 		},
 		"color": func(color string) string {
+			if noColor {
+				return ""
+			}
 			return ansi.ColorCode(color)
 		},
 		"remLineBreak": func(content string) string {

jiracli/usage.go

@@ -119,6 +119,16 @@ func CommandLine(fig *figtree.FigTree, o *oreo.Client) *kingpin.Application {
 		return nil
 	}).CounterVar(&verbosity)
 
+	var color bool
+	app.Flag("color", "Enable/Disable output color").PreAction(func(_ *kingpin.ParseContext) error {
+		if color {
+			os.Unsetenv("NO_COLOR")
+		} else {
+			os.Setenv("NO_COLOR", "1")
+		}
+		return nil
+	}).Hidden().BoolVar(&color)
+
 	app.Terminate(func(status int) {
 		for _, arg := range os.Args {
 			if arg == "-h" || arg == "--help" || len(os.Args) == 1 {