feat: `helmfile build --embed-values` to embed release values and secrets into the output (#1436)

main.go

@@ -467,7 +467,12 @@ func main() {
 		{
 			Name:  "build",
 			Usage: "output compiled helmfile state(s) as YAML",
-			Flags: []cli.Flag{},
+			Flags: []cli.Flag{
+				cli.BoolFlag{
+					Name:  "embed-values",
+					Usage: "Read all the values files for every release and embed into the output helmfile.yaml",
+				},
+			},
 			Action: action(func(run *app.App, c configImpl) error {
 				return run.PrintState(c)
 			}),
@@ -674,6 +679,10 @@ func (c configImpl) Context() int {
 	return c.c.Int("context")
 }
 
+func (c configImpl) EmbedValues() bool {
+	return c.c.Bool("embed-values")
+}
+
 func (c configImpl) Logger() *zap.SugaredLogger {
 	return c.c.App.Metadata["logger"].(*zap.SugaredLogger)
 }

pkg/app/app.go

@@ -387,12 +387,35 @@ func (a *App) PrintState(c StateConfigProvider) error {
 		err := run.withPreparedCharts("build", state.ChartPrepareOptions{
 			SkipRepos: true,
 		}, func() {
-			state, err := run.state.ToYaml()
+			if c.EmbedValues() {
+				for i := range run.state.Releases {
+					r := run.state.Releases[i]
+
+					values, err := run.state.LoadYAMLForEmbedding(r.Values, r.MissingFileHandler, r.ValuesPathPrefix)
+					if err != nil {
+						errs = []error{err}
+						return
+					}
+
+					run.state.Releases[i].Values = values
+
+					secrets, err := run.state.LoadYAMLForEmbedding(r.Secrets, r.MissingFileHandler, r.ValuesPathPrefix)
+					if err != nil {
+						errs = []error{err}
+						return
+					}
+
+					run.state.Releases[i].Secrets = secrets
+				}
+			}
+
+			stateYaml, err := run.state.ToYaml()
 			if err != nil {
 				errs = []error{err}
 				return
 			}
-			fmt.Printf("---\n#  Source: %s\n\n%+v", run.state.FilePath, state)
+
+			fmt.Printf("---\n#  Source: %s\n\n%+v", run.state.FilePath, stateYaml)
 
 			errs = []error{}
 		})

pkg/app/app_test.go

@@ -2272,6 +2272,10 @@ func (c configImpl) Concurrency() int {
 	return 1
 }
 
+func (c configImpl) EmbedValues() bool {
+	return false
+}
+
 func (c configImpl) Output() string {
 	return c.output
 }

pkg/app/config.go

@@ -144,6 +144,7 @@ type StatusesConfigProvider interface {
 }
 
 type StateConfigProvider interface {
+	EmbedValues() bool
 }
 
 type concurrencyConfig interface {

pkg/state/release.go

@@ -133,12 +133,15 @@ func (r ReleaseSpec) ExecuteTemplateExpressions(renderer *tmpl.FileRenderer) (*R
 		}
 	}
 
-	for i, ts := range result.Secrets {
-		s, err := renderer.RenderTemplateContentToBuffer([]byte(ts))
-		if err != nil {
-			return nil, fmt.Errorf("failed executing template expressions in release \"%s\".secrets[%d] = \"%s\": %v", r.Name, i, ts, err)
+	for i, t := range result.Secrets {
+		switch ts := t.(type) {
+		case string:
+			s, err := renderer.RenderTemplateContentToBuffer([]byte(ts))
+			if err != nil {
+				return nil, fmt.Errorf("failed executing template expressions in release \"%s\".secrets[%d] = \"%s\": %v", r.Name, i, ts, err)
+			}
+			result.Secrets[i] = s.String()
 		}
-		result.Secrets[i] = s.String()
 	}
 
 	if len(result.SetValuesTemplate) > 0 {

pkg/state/state.go

@@ -211,7 +211,7 @@ type ReleaseSpec struct {
 	Namespace string            `yaml:"namespace,omitempty"`
 	Labels    map[string]string `yaml:"labels,omitempty"`
 	Values    []interface{}     `yaml:"values,omitempty"`
-	Secrets   []string          `yaml:"secrets,omitempty"`
+	Secrets   []interface{}     `yaml:"secrets,omitempty"`
 	SetValues []SetValue        `yaml:"set,omitempty"`
 
 	ValuesTemplate    []interface{} `yaml:"valuesTemplate,omitempty"`
@@ -2262,11 +2262,41 @@ func (st *HelmState) generateVanillaValuesFiles(release *ReleaseSpec) ([]string,
 func (st *HelmState) generateSecretValuesFiles(helm helmexec.Interface, release *ReleaseSpec, workerIndex int) ([]string, error) {
 	var generatedFiles []string
 
-	for _, value := range release.Secrets {
-		paths, skip, err := st.storage().resolveFile(release.MissingFileHandler, "secrets", release.ValuesPathPrefix+value)
-		if err != nil {
-			return nil, err
+	for _, v := range release.Secrets {
+		var (
+			paths []string
+			skip  bool
+			err   error
+		)
+
+		switch value := v.(type) {
+		case string:
+			paths, skip, err = st.storage().resolveFile(release.MissingFileHandler, "secrets", release.ValuesPathPrefix+value)
+			if err != nil {
+				return nil, err
+			}
+		default:
+			bs, err := yaml.Marshal(value)
+			if err != nil {
+				return nil, err
+			}
+
+			path, err := ioutil.TempFile(os.TempDir(), "helmfile-embdedded-secrets-*.yaml.enc")
+			if err != nil {
+				return nil, err
+			}
+			_ = path.Close()
+			defer func() {
+				_ = os.Remove(path.Name())
+			}()
+
+			if err := ioutil.WriteFile(path.Name(), bs, 0644); err != nil {
+				return nil, err
+			}
+
+			paths = []string{path.Name()}
 		}
+
 		if skip {
 			continue
 		}
@@ -2546,3 +2576,42 @@ func (st *HelmState) ToYaml() (string, error) {
 		return string(result), nil
 	}
 }
+
+func (st *HelmState) LoadYAMLForEmbedding(entries []interface{}, missingFileHandler *string, pathPrefix string) ([]interface{}, error) {
+	var result []interface{}
+
+	for _, v := range entries {
+		switch t := v.(type) {
+		case string:
+			var values map[string]interface{}
+
+			paths, skip, err := st.storage().resolveFile(missingFileHandler, "values", pathPrefix+t)
+			if err != nil {
+				return nil, err
+			}
+			if skip {
+				continue
+			}
+
+			if len(paths) > 1 {
+				return nil, fmt.Errorf("glob patterns in release values and secrets is not supported yet. please submit a feature request if necessary")
+			}
+			yamlOrTemplatePath := paths[0]
+
+			yamlBytes, err := st.RenderValuesFileToBytes(yamlOrTemplatePath)
+			if err != nil {
+				return nil, fmt.Errorf("failed to render values files \"%s\": %v", t, err)
+			}
+
+			if err := yaml.Unmarshal(yamlBytes, &values); err != nil {
+				return nil, err
+			}
+
+			result = append(result, values)
+		default:
+			result = append(result, v)
+		}
+	}
+
+	return result, nil
+}

pkg/state/state_exec_tmpl_test.go

@@ -36,7 +36,7 @@ func TestHelmState_executeTemplates(t *testing.T) {
 				Name:           "test-app",
 				Namespace:      "test-namespace-{{ .Release.Name }}",
 				ValuesTemplate: []interface{}{"config/{{ .Environment.Name }}/{{ .Release.Name }}/values.yaml"},
-				Secrets:        []string{"config/{{ .Environment.Name }}/{{ .Release.Name }}/secrets.yaml"},
+				Secrets:        []interface{}{"config/{{ .Environment.Name }}/{{ .Release.Name }}/secrets.yaml"},
 				Labels:         map[string]string{"id": "{{ .Release.Name }}"},
 			},
 			want: ReleaseSpec{
@@ -45,7 +45,7 @@ func TestHelmState_executeTemplates(t *testing.T) {
 				Name:      "test-app",
 				Namespace: "test-namespace-test-app",
 				Values:    []interface{}{"config/test_env/test-app/values.yaml"},
-				Secrets:   []string{"config/test_env/test-app/secrets.yaml"},
+				Secrets:   []interface{}{"config/test_env/test-app/secrets.yaml"},
 				Labels:    map[string]string{"id": "test-app"},
 			},
 		},