first commit status: option and argument parsing, short aliases grouping, special values, hidden options

Option types: bool int, int-array, string, string-array, string-map, file, dir

arg-string-array.go

@@ -0,0 +1,49 @@
+package cli
+
+// -------------- argStringArray ----------------
+type argStringArray struct {
+	base      argBase
+	targetVar *[]string
+}
+
+func (arg *argStringArray) getBase() *argBase {
+	return &arg.base
+}
+
+func (spec *argStringArray) parse(cli *CliParser, specIndex int, args []string, argIndex int) (consumedArgs int, err error) {
+	consumedArgs = 1
+	if spec.targetVar != nil {
+		if argIndex < len(args) {
+			remainingSpecs := len(cli.argSpecs) - specIndex - 1
+			availableArgs := len(args) - remainingSpecs
+			if availableArgs > 0 {
+				*spec.targetVar = args[argIndex : argIndex+availableArgs]
+				consumedArgs = availableArgs
+			} else {
+				err = errTooFewArguments(len(cli.argSpecs))
+			}
+		} else if spec.base.required {
+			err = errMissingRequiredArg(spec.base.name)
+		}
+	}
+	return
+}
+
+func (cli *CliParser) AddStringArrayArg(name string, required bool, targetVar *[]string, description string) {
+	// todo: check if arg already exists
+	if len(cli.argSpecs) > 0 {
+		lastArg := cli.argSpecs[len(cli.argSpecs)-1].getBase()
+		if lastArg.repeat {
+			panic(errRepeatArgAlreadyDefined(lastArg.name))
+		}
+	}
+	cli.argSpecs = append(cli.argSpecs, &argStringArray{
+		base: argBase{
+			name:        name,
+			description: description,
+			required:    required,
+			repeat:      true,
+		},
+		targetVar: targetVar,
+	})
+}