add a way to add arbitrary plist contents

main.go

@@ -29,6 +29,7 @@ func run() error {
 		version    = flag.String("version", "1.0", "app version")
 		identifier = flag.String("id", "", "bundle identifier")
 		icon       = flag.String("icon", "", "icon image file (.icns|.png|.jpg|.jpeg)")
+		extraPlist = flag.String("plist", "", "path to file with additional plist dict key/value items")
 	)
 	flag.Parse()
 	args := flag.Args()
@@ -70,6 +71,13 @@ func run() error {
 	if id == "" {
 		id = *author + "." + *name
 	}
+	if *extraPlist != "" {
+		b, err := os.ReadFile(*extraPlist)
+		if err != nil {
+			return errors.Wrap(err, "error reading plist location: "+*extraPlist)
+		}
+		*extraPlist = string(b)
+	}
 	info := infoListData{
 		Name:               *name,
 		Executable:         filepath.Join("MacOS", appname),
@@ -77,6 +85,7 @@ func run() error {
 		Version:            *version,
 		InfoString:         *name + " by " + *author,
 		ShortVersionString: *version,
+		AdditionalPList:    *extraPlist,
 	}
 	if *icon != "" {
 		iconPath, err := prepareIcons(*icon, resouresPath)
@@ -150,6 +159,7 @@ type infoListData struct {
 	InfoString         string
 	ShortVersionString string
 	IconFile           string
+	AdditionalPList    string
 }
 
 const infoPlistTemplate = `<?xml version="1.0" encoding="UTF-8"?>
@@ -176,6 +186,9 @@ const infoPlistTemplate = `<?xml version="1.0" encoding="UTF-8"?>
 		<key>CFBundleIconFile</key>
 		<string>{{ .IconFile }}</string>
 		{{- end }}
+{{- if .AdditionalPList -}}
+{{ .AdditionalPList -}}
+{{- end }}
 	</dict>
 </plist>
 `