feat: `--skip-repos` for `helmfile deps` (#851)

Resolves #661

main.go

@@ -115,6 +115,10 @@ func main() {
 					Value: "",
 					Usage: "pass args to helm exec",
 				},
+				cli.BoolFlag{
+					Name:  "skip-repos",
+					Usage: "skip running `helm repo update` before running `helm dependency build`",
+				},
 			},
 			Action: action(func(run *app.App, c configImpl) error {
 				return run.Deps(c)
@@ -495,6 +499,10 @@ func (c configImpl) Set() []string {
 	return c.c.StringSlice("set")
 }
 
+func (c configImpl) SkipRepos() bool {
+	return c.c.Bool("skip-repos")
+}
+
 func (c configImpl) Values() []string {
 	return c.c.StringSlice("values")
 }

pkg/app/config.go

@@ -26,6 +26,7 @@ type DeprecatedChartsConfigProvider interface {
 
 type DepsConfigProvider interface {
 	Args() string
+	SkipRepos() bool
 }
 
 type ReposConfigProvider interface {

pkg/app/run.go

@@ -31,9 +31,11 @@ func (r *Run) askForConfirmation(msg string) bool {
 func (r *Run) Deps(c DepsConfigProvider) []error {
 	r.helm.SetExtraArgs(argparser.GetArgs(c.Args(), r.state)...)
 
+	if !c.SkipRepos() {
 		if errs := r.ctx.SyncReposOnce(r.state, r.helm); errs != nil && len(errs) > 0 {
 			return errs
 		}
+	}
 
 	return r.state.UpdateDeps(r.helm)
 }