use helm engine in cli
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4dac2ea565
commit
07d0cab3ee
GPG Key ID:
0F647F8A6A3AF588
84
main.go
84
main.go
@ -79,8 +79,10 @@ var flags struct {
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valuesFiles valFileSlice
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values valSlice
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outputDelimiter string
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// helmCompatFuncs bool
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helmCompat bool
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helm bool
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helmStrict bool
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helmDNSFunc bool
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helmLint bool
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}
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func init() {
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@ -91,15 +93,25 @@ func init() {
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"d", "---",
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"Output delimiter between template files rendered",
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)
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// flag.BoolVar(
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// &flags.helmCompatFuncs,
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// "hf", false,
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// "Enable Helm compatibility functions. See below for more info.",
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// )
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flag.BoolVar(
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&flags.helmCompat,
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&flags.helm,
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"helm", false,
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"Helm compatibility: behave more like Helm templating. See below for more info.",
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"Use Helm templating language (superset of Sprig).",
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)
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flag.BoolVar(
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&flags.helmStrict,
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"helmStrict", true,
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"When using Helm Tpl Lang, use strict rendering.",
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)
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flag.BoolVar(
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&flags.helmDNSFunc,
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"helm", true,
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"When using Helm Tpl Lang, support DNS resolution.",
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)
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flag.BoolVar(
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&flags.helmLint,
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"helmLint", false,
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"When using Helm Tpl Lang, enable the Linting Mode.",
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)
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flag.Parse()
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@ -127,20 +139,9 @@ func init() {
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fmt.Fprintf(flag.CommandLine.Output(), "\n")
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fmt.Fprintf(
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flag.CommandLine.Output(),
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"Helm Compatibility Mode: this mode attempts to mimic the behavior\n"+
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"of the Helm Template command. It does the following:\n"+
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"\t- Provided values are automatically nested under the .Values key.\n"+
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"\t- Helm compatibility functions are enabled (see below for more info).\n",
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)
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fmt.Fprintf(flag.CommandLine.Output(), "\n")
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fmt.Fprintf(
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flag.CommandLine.Output(),
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"Helm Compatibility Funcs: these are approximate implementations of the\n"+
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"additional functions included in the Helm Templating language."+
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"The following are implemented:\n"+
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"\t- include\n"+
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"\t- required\n"+
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"\t- tpl\n",
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"Helm Mode: use the Helm Templating Language/Engine\n"+
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"with the following caveats:\n"+
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"\t- 'lookup' function unavailable.\n",
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)
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fmt.Fprintf(flag.CommandLine.Output(), "\n")
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}
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@ -223,7 +224,7 @@ func expandFiles(files []string) (expFiles []string) {
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func mergeValues() (res map[string]interface{}) {
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res = map[string]interface{}{}
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result := res
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if flags.helmCompat {
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if flags.helm {
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res["Values"] = map[string]interface{}{}
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result = res["Values"].(map[string]interface{})
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}
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@ -257,6 +258,11 @@ func mergeValues() (res map[string]interface{}) {
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func main() {
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var err error
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var ht *helm.Templater
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lo := &helm.LangOpts{
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Strict: flags.helmStrict,
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LintMode: flags.helmLint,
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EnableDNS: flags.helmDNSFunc,
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}
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tpl := template.New("base").Funcs(sprig.FuncMap())
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values := mergeValues()
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@ -281,7 +287,7 @@ func main() {
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ch <- struct{}{}
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checkErr(err)
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if flags.helmCompat {
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if flags.helm {
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ht = helm.NewTemplaterWithBytes(data, nil)
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fmt.Fprintf(os.Stderr, "WARN: Helm Compatibility only partially implemented.\n")
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tpl, err = tpl.Parse(string(data))
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@ -295,10 +301,9 @@ func main() {
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data, err = io.ReadAll(os.Stdin)
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checkErr(err)
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if flags.helmCompat {
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ht = helm.NewTemplaterWithBytes(data, nil)
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if flags.helm {
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fmt.Fprintf(os.Stderr, "WARN: Helm Compatibility only partially implemented.\n")
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tpl, err = tpl.Parse(string(data))
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ht = helm.NewTemplaterWithBytes(data, lo)
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} else {
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tpl, err = tpl.Parse(string(data))
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}
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@ -306,24 +311,27 @@ func main() {
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} else {
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// Otherwise use the provided tplFiles/directories for templates to render.
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tplFiles := expandFiles(flag.Args())
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if flags.helmCompat {
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if flags.helm {
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fmt.Fprintf(os.Stderr, "WARN: Helm Compatibility only partially implemented.\n")
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ht, err = helm.NewTemplaterWithFiles(tplFiles, nil)
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ht, err = helm.NewTemplaterWithFiles(tplFiles, lo)
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checkErr(err)
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tpl, err = tpl.ParseFiles(tplFiles...)
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rendered, err := ht.Render(values)
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checkErr(err)
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for i, file := range tplFiles {
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if i > 0 {
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fmt.Println(flags.outputDelimiter)
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first := true
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for filename, content := range rendered {
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if first {
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first = false
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} else {
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fmt.Fprintf(os.Stdout, "%s: %s", flags.outputDelimiter, filename)
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}
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checkErr(tpl.ExecuteTemplate(os.Stdout, filepath.Base(file), values))
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fmt.Fprintln(os.Stdout, content)
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}
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} else {
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tpl, err = tpl.ParseFiles(tplFiles...)
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checkErr(err)
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for i, file := range tplFiles {
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if i > 0 {
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fmt.Println(flags.outputDelimiter)
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fmt.Fprintf(os.Stdout, "%s: %s", flags.outputDelimiter, file)
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}
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checkErr(tpl.ExecuteTemplate(os.Stdout, filepath.Base(file), values))
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}
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@ -331,7 +339,9 @@ func main() {
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return
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}
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if ht != nil {
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checkErr(tpl.Execute(os.Stdout, values))
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rendered, err := ht.Render(values)
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checkErr(err)
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fmt.Fprintln(os.Stdout, rendered)
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} else {
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checkErr(tpl.Execute(os.Stdout, values))
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}
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