lang: funcs: funcgen: Allow []string as inputs

This allows us to have the strings.Join function generated.

lang/funcs/funcgen/util/util.go

@@ -0,0 +1,33 @@
+// Mgmt
+// Copyright (C) 2013-2023+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+// Package util provides some functions to be imported by the generated file.
+package util
+
+import (
+	"github.com/purpleidea/mgmt/lang/types"
+)
+
+// MclListToGolang is a helper function that converts an mcl []str to the golang
+// equivalent of []string. This is imported by the generated functions.
+func MclListToGolang(val types.Value) []string {
+	ret := []string{}
+	for _, x := range val.List() {
+		ret = append(ret, x.Str())
+	}
+	return ret
+}