Add support for --validate on chartify (#1960)

Apparently we needed to pass `--validate` on helm-template run by chartify when the targeted chart contains Capabilities.APIVersions in a chart template. Otherwise, you can never make such chart work with chartify, as at apply time helm template expressions that involved Capabilities.APIVersions are already nowhere.

pkg/app/app.go

@@ -172,6 +172,7 @@ func (a *App) Diff(c DiffConfigProvider) error {
 			SkipRepos:   c.SkipDeps(),
 			SkipDeps:    c.SkipDeps(),
 			IncludeCRDs: &includeCRDs,
+			Validate:    c.Validate(),
 		}, func() {
 			msg, matched, affected, errs = a.diff(run, c)
 		})
@@ -238,6 +239,7 @@ func (a *App) Template(c TemplateConfigProvider) error {
 			SkipDeps:      c.SkipDeps(),
 			IncludeCRDs:   &includeCRDs,
 			SkipCleanup:   c.SkipCleanup(),
+			Validate:      c.Validate(),
 		}, func() {
 			ok, errs = a.template(run, c)
 		})
@@ -392,6 +394,7 @@ func (a *App) Apply(c ApplyConfigProvider) error {
 			WaitForJobs: c.WaitForJobs(),
 			IncludeCRDs: &includeCRDs,
 			SkipCleanup: c.RetainValuesFiles() || c.SkipCleanup(),
+			Validate:    c.Validate(),
 		}, func() {
 			matched, updated, es := a.apply(run, c)
 

pkg/app/config.go

@@ -57,6 +57,7 @@ type ApplyConfigProvider interface {
 	DiffOutput() string
 
 	RetainValuesFiles() bool
+	Validate() bool
 	SkipCleanup() bool
 	SkipDiffOnInstall() bool
 
@@ -90,6 +91,7 @@ type DiffConfigProvider interface {
 
 	Values() []string
 	Set() []string
+	Validate() bool
 	SkipCRDs() bool
 	SkipDeps() bool
 

pkg/state/state.go

@@ -966,10 +966,13 @@ type ChartPrepareOptions struct {
 	SkipDeps      bool
 	SkipResolve   bool
 	SkipCleanup   bool
-	IncludeCRDs   *bool
-	Wait          bool
-	WaitForJobs   bool
-	OutputDir     string
+	// Validate is a helm-3-only option. When it is set to true, it configures chartify to pass --validate to helm-template run by it.
+	// It's required when one of your chart relies on Capabilities.APIVersions in a template
+	Validate    bool
+	IncludeCRDs *bool
+	Wait        bool
+	WaitForJobs bool
+	OutputDir   string
 }
 
 type chartPrepareResult struct {
@@ -1142,9 +1145,10 @@ func (st *HelmState) PrepareCharts(helm helmexec.Interface, dir string, concurre
 					if opts.IncludeCRDs != nil {
 						includeCRDs = *opts.IncludeCRDs
 					}
-
 					chartifyOpts.IncludeCRDs = includeCRDs
 
+					chartifyOpts.Validate = opts.Validate
+
 					out, err := c.Chartify(release.Name, chartPath, chartify.WithChartifyOpts(chartifyOpts))
 					if err != nil {
 						results <- &chartPrepareResult{err: err}