Write and append to config file using ini package

src/backend/configParser.go

@@ -6,16 +6,23 @@ import (
 	"os"
 )
 
-// ReadConfig reads the libmutton.ini file and returns a slice of values for the specified keys
-// requires readKeys: a slice of key names (indicates requested values)
-// requires missingValueError: an error message to display if a key is missing a value, set to "" for auto-generated or "0" to exit silently with status 0
-// returns config: a slice of values for the specified keys
-func ReadConfig(readKeys []string, missingValueError string) []string {
+// loadConfig loads the libmutton.ini file and returns the configuration
+// utility function for ParseConfig and WriteConfig, do not call directly
+func loadConfig() *ini.File {
 	cfg, err := ini.Load(ConfigPath)
 	if err != nil {
 		fmt.Println(AnsiError + "Failed to load libmutton.ini: " + err.Error() + AnsiReset)
 		os.Exit(1)
 	}
+	return cfg
+}
+
+// ParseConfig reads the libmutton.ini file and returns a slice of values for the specified keys
+// requires readKeys: a slice of key names (indicates requested values)
+// requires missingValueError: an error message to display if a key is missing a value, set to "" for auto-generated or "0" to exit silently with status 0
+// returns config: a slice of values for the specified keys
+func ParseConfig(readKeys []string, missingValueError string) []string {
+	cfg := loadConfig()
 
 	var config []string
 
@@ -41,7 +48,44 @@ func ReadConfig(readKeys []string, missingValueError string) []string {
 	return config
 }
 
-// libmuttn.ini layout
+// WriteConfig writes the provided key-value pairs to the libmutton.ini file
+func WriteConfig(configFileMap map[string]string, append bool) {
+	var cfg *ini.File
+	var libmuttonSection *ini.Section
+
+	if append {
+		// load existing ini file
+		cfg = loadConfig()
+
+		// acquire LIBMUTTON section
+		libmuttonSection, _ = cfg.GetSection("LIBMUTTON")
+	} else {
+		// create empty ini file
+		cfg = ini.Empty()
+
+		// create LIBMUTTON section
+		libmuttonSection, _ = cfg.NewSection("LIBMUTTON")
+
+		// set default textEditor value
+		if configFileMap["textEditor"] == "" {
+			configFileMap["textEditor"] = textEditorFallback()
+		}
+	}
+
+	// write provided configFileMap key-value pairs to the LIBMUTTON section
+	for key, value := range configFileMap {
+		libmuttonSection.Key(key).SetValue(value)
+	}
+
+	// save the new config file
+	err := cfg.SaveTo(ConfigPath)
+	if err != nil {
+		fmt.Println(AnsiError + "Failed to save libmutton.ini: " + err.Error() + AnsiReset)
+		os.Exit(1)
+	}
+}
+
+// libmutton.ini layout
 // [LIBMUTTON]
 // gpgID = <gpg key id>
 // textEditor = <editor command>
@@ -51,3 +95,9 @@ func ReadConfig(readKeys []string, missingValueError string) []string {
 // sshKey = <ssh private key identity file path>
 // sshKeyProtected = <true/false>
 // netPinEnabled = <true/false>
+// sshEntryRoot = <remote entry root>
+// sshIsWindows = <true/false>
+
+// Developers of alternative clients:
+// If you are adding additional settings to the config file,
+// please create a new section heading for your app-specific settings.