feat: add iter template fn for initting inline slices

base/fup.go

@@ -69,7 +69,7 @@ func getConfigReader(config string) (configReader, error) {
 }
 
 func evalConfig(data []byte) ([]byte, error) {
-	tmpl := template.New("config").Funcs(precheck.FactFns)
+	tmpl := template.New("config").Funcs(precheck.FactFns).Funcs(internal.UtilFns)
 	parsed, err := tmpl.Parse(string(data))
 	if err != nil {
 		return data, err

internal/template.go

@@ -7,9 +7,10 @@ import (
 	"text/template"
 )
 
-var funcMap = template.FuncMap{
+var UtilFns = template.FuncMap{
 	"cut":     cut,
 	"head":    head,
+	"iter":    iterItems,
 	"revCut":  reverseCut,
 	"split":   split,
 	"splitBy": splitBy,
@@ -36,6 +37,14 @@ func cut(i int, s string) (string, error) {
 	return s[i:], nil
 }
 
+func head(i int, s string) (string, error) {
+	return splitBy("\n", i, s)
+}
+
+func iterItems(item ...string) []string {
+	return item
+}
+
 func reverseCut(i int, s string) (string, error) {
 	i, err := absIndex(s, i)
 	if err != nil {
@@ -45,6 +54,10 @@ func reverseCut(i int, s string) (string, error) {
 	return s[:i], nil
 }
 
+func split(i int, s string) (string, error) {
+	return splitBy(" ", i, s)
+}
+
 func splitBy(delimiter string, i int, s string) (string, error) {
 	s = strings.Trim(s, delimiter)
 	fields := strings.Split(s, delimiter)
@@ -58,16 +71,8 @@ func splitBy(delimiter string, i int, s string) (string, error) {
 	return fields[i], nil
 }
 
-func head(i int, s string) (string, error) {
-	return splitBy("\n", i, s)
-}
-
-func split(i int, s string) (string, error) {
-	return splitBy(" ", i, s)
-}
-
 func RunTemplateFn(input, tmplFn string) (string, error) {
-	tmpl := template.New("post-proc").Funcs(funcMap)
+	tmpl := template.New("post-proc").Funcs(UtilFns)
 
 	ctx := struct {
 		Args string

main.go

@@ -13,7 +13,7 @@ import (
 )
 
 const (
-	version = "0.27.1"
+	version = "0.28.0"
 )
 
 type args struct {