feat: Opt-out dep-builds and repo-updates (#463)

* Improve code organization

To make sure it is still readable after upcoming changes to helmfile

* feat: `helmfile deps` to update dependencies of all the local charts

Resolves #450

* feat: helmfile updates repos and build deps by default

But not update deps. Use `helmfile deps` to update deps, and provide `--skip-deps` to skip updating repos and builds deps in sync/diff/apply/template

Resolves #415

* Improve integration test coverage

state/state.go

@@ -830,6 +830,23 @@ func (st *HelmState) UpdateDeps(helm helmexec.Interface) []error {
 	return nil
 }
 
+// BuildDeps wrapper for building dependencies on the releases
+func (st *HelmState) BuildDeps(helm helmexec.Interface) []error {
+	errs := []error{}
+
+	for _, release := range st.Releases {
+		if isLocalChart(release.Chart) {
+			if err := helm.BuildDeps(normalizeChart(st.basePath, release.Chart)); err != nil {
+				errs = append(errs, err)
+			}
+		}
+	}
+	if len(errs) != 0 {
+		return errs
+	}
+	return nil
+}
+
 // JoinBase returns an absolute path in the form basePath/relative
 func (st *HelmState) JoinBase(relPath string) string {
 	return filepath.Join(st.basePath, relPath)

state/state_test.go

@@ -524,6 +524,14 @@ func (helm *mockHelmExec) UpdateDeps(chart string) error {
 	return nil
 }
 
+func (helm *mockHelmExec) BuildDeps(chart string) error {
+	if strings.Contains(chart, "error") {
+		return errors.New("error")
+	}
+	helm.charts = append(helm.charts, chart)
+	return nil
+}
+
 func (helm *mockHelmExec) SetExtraArgs(args ...string) {
 	return
 }