Allow skipping chart-related operations when installed: false (#1233)

Resolves #1232

CHANGES:

* Disable repo update when installed is false

When install is false, we do not need to update the repositories and get
the chart.

Signed-off-by: Guillaume Perrin <guillaume28.perrin@gmail.com>

pkg/app/app.go

@@ -1163,6 +1163,9 @@ func (a *App) template(r *Run, c TemplateConfigProvider) (bool, []error) {
 	releasesToRender := map[string]state.ReleaseSpec{}
 	for _, r := range toRender {
 		id := state.ReleaseToID(&r)
+		if r.Installed != nil && !*r.Installed {
+			continue
+		}
 		releasesToRender[id] = r
 	}
 

pkg/app/context.go

@@ -17,6 +17,15 @@ func NewContext() Context {
 func (ctx Context) SyncReposOnce(st *state.HelmState, helm state.RepoUpdater) []error {
 	var errs []error
 
+	hasInstalled := false
+	for _, release := range st.Releases {
+		hasInstalled = hasInstalled || release.Installed == nil || *release.Installed
+	}
+
+	if !hasInstalled {
+		return errs
+	}
+
 	allUpdated := true
 	for _, r := range st.Repositories {
 		_, exists := ctx.updatedRepos[r.Name]