feat(artifactPrepareVersion): helm & propagate version (#3627)

* feat(artifactPrepareVersion): helm & propagate version

* chore: small refactoring

* chore: fix linting issue

* fix version persistence

cmd/artifactPrepareVersion.go

@@ -124,11 +124,9 @@ func runArtifactPrepareVersion(config *artifactPrepareVersionOptions, telemetryD
 		}
 	}
 
-	versioningType := config.VersioningType
-
 	// support former groovy versioning template and translate into new options
 	if len(config.VersioningTemplate) > 0 {
-		versioningType, _, config.IncludeCommitID = templateCompatibility(config.VersioningTemplate)
+		config.VersioningType, _, config.IncludeCommitID = templateCompatibility(config.VersioningTemplate)
 	}
 
 	version, err := artifact.GetVersion()
@@ -148,18 +146,12 @@ func runArtifactPrepareVersion(config *artifactPrepareVersionOptions, telemetryD
 	commonPipelineEnvironment.git.headCommitID = gitCommitID
 	newVersion := version
 
-	if versioningType == "cloud" || versioningType == "cloud_noTag" {
+	if config.VersioningType == "cloud" || config.VersioningType == "cloud_noTag" {
-		versioningTempl, err := versioningTemplate(artifact.VersioningScheme())
-		if err != nil {
-			log.SetErrorCategory(log.ErrorConfiguration)
-			return errors.Wrapf(err, "failed to get versioning template for scheme '%v'", artifact.VersioningScheme())
-		}
-
 		now := time.Now()
 
-		newVersion, err = calculateNewVersion(versioningTempl, version, gitCommitID, config.IncludeCommitID, config.ShortCommitID, config.UnixTimestamp, now)
+		newVersion, err = calculateCloudVersion(artifact, config, version, gitCommitID, now)
 		if err != nil {
-			return errors.Wrap(err, "failed to calculate new version")
+			return err
 		}
 
 		worktree, err := getWorktree(repository)
@@ -185,9 +177,15 @@ func runArtifactPrepareVersion(config *artifactPrepareVersionOptions, telemetryD
 			}
 		}
 
-		//ToDo: what about closure in current Groovy step. Discard the possibility or provide extension mechanism?
+		// propagate version information to additional descriptors
+		if len(config.AdditionalTargetTools) > 0 {
+			err = propagateVersion(config, utils, &artifactOpts, newVersion, gitCommitID, now)
+			if err != nil {
+				return err
+			}
+		}
 
-		if versioningType == "cloud" {
+		if config.VersioningType == "cloud" {
 			// commit changes and push to repository (including new version tag)
 			gitCommitID, err = pushChanges(config, newVersion, repository, worktree, now)
 			if err != nil {
@@ -450,3 +448,71 @@ func templateCompatibility(groovyTemplate string) (versioningType string, useTim
 
 	return
 }
+
+func calculateCloudVersion(artifact versioning.Artifact, config *artifactPrepareVersionOptions, version, gitCommitID string, timestamp time.Time) (string, error) {
+	versioningTempl, err := versioningTemplate(artifact.VersioningScheme())
+	if err != nil {
+		log.SetErrorCategory(log.ErrorConfiguration)
+		return "", errors.Wrapf(err, "failed to get versioning template for scheme '%v'", artifact.VersioningScheme())
+	}
+
+	newVersion, err := calculateNewVersion(versioningTempl, version, gitCommitID, config.IncludeCommitID, config.ShortCommitID, config.UnixTimestamp, timestamp)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to calculate new version")
+	}
+	return newVersion, nil
+}
+
+func propagateVersion(config *artifactPrepareVersionOptions, utils artifactPrepareVersionUtils, artifactOpts *versioning.Options, newVersion, gitCommitID string, now time.Time) error {
+	var err error
+
+	if len(config.AdditionalTargetDescriptors) > 0 && len(config.AdditionalTargetTools) != len(config.AdditionalTargetDescriptors) {
+		log.SetErrorCategory(log.ErrorConfiguration)
+		return fmt.Errorf("additionalTargetDescriptors cannot have a different number of entries than additionalTargetTools")
+	}
+
+	for i, targetTool := range config.AdditionalTargetTools {
+		if targetTool == config.BuildTool {
+			// ignore configured build tool
+			continue
+		}
+
+		var buildDescriptors []string
+		if len(config.AdditionalTargetDescriptors) > 0 {
+			buildDescriptors, err = utils.Glob(config.AdditionalTargetDescriptors[i])
+			if err != nil {
+				log.SetErrorCategory(log.ErrorConfiguration)
+				return fmt.Errorf("failed to retrieve build descriptors: %w", err)
+			}
+		}
+
+		if len(buildDescriptors) == 0 {
+			buildDescriptors = append(buildDescriptors, "")
+		}
+
+		// in case of helm, make sure that app version is adapted as well
+		artifactOpts.HelmUpdateAppVersion = true
+
+		for _, buildDescriptor := range buildDescriptors {
+			targetArtifact, err := versioning.GetArtifact(targetTool, buildDescriptor, artifactOpts, utils)
+			if err != nil {
+				log.SetErrorCategory(log.ErrorConfiguration)
+				return fmt.Errorf("failed to retrieve artifact: %w", err)
+			}
+
+			// Make sure that version type fits to target artifact
+			var descriptorVersion string
+			if config.VersioningType == "cloud" || config.VersioningType == "cloud_noTag" {
+				descriptorVersion, err = calculateCloudVersion(targetArtifact, config, newVersion, gitCommitID, now)
+				if err != nil {
+					return err
+				}
+			}
+			err = targetArtifact.SetVersion(descriptorVersion)
+			if err != nil {
+				return fmt.Errorf("failed to set additional target version for '%v': %w", targetTool, err)
+			}
+		}
+	}
+	return nil
+}

cmd/artifactPrepareVersion_generated.go

@@ -18,25 +18,27 @@ import (
 )
 
 type artifactPrepareVersionOptions struct {
-	BuildTool              string `json:"buildTool,omitempty" validate:"possible-values=custom docker dub golang gradle maven mta npm pip sbt yarn"`
+	AdditionalTargetTools       []string `json:"additionalTargetTools,omitempty" validate:"possible-values=custom docker dub golang gradle helm maven mta npm pip sbt yarn"`
-	CommitUserName         string `json:"commitUserName,omitempty"`
+	AdditionalTargetDescriptors []string `json:"additionalTargetDescriptors,omitempty"`
-	CustomVersionField     string `json:"customVersionField,omitempty"`
+	BuildTool                   string   `json:"buildTool,omitempty" validate:"possible-values=custom docker dub golang gradle helm maven mta npm pip sbt yarn"`
-	CustomVersionSection   string `json:"customVersionSection,omitempty"`
+	CommitUserName              string   `json:"commitUserName,omitempty"`
-	CustomVersioningScheme string `json:"customVersioningScheme,omitempty" validate:"possible-values=docker maven pep440 semver2"`
+	CustomVersionField          string   `json:"customVersionField,omitempty"`
-	DockerVersionSource    string `json:"dockerVersionSource,omitempty"`
+	CustomVersionSection        string   `json:"customVersionSection,omitempty"`
-	FetchCoordinates       bool   `json:"fetchCoordinates,omitempty"`
+	CustomVersioningScheme      string   `json:"customVersioningScheme,omitempty" validate:"possible-values=docker maven pep440 semver2"`
-	FilePath               string `json:"filePath,omitempty"`
+	DockerVersionSource         string   `json:"dockerVersionSource,omitempty"`
-	GlobalSettingsFile     string `json:"globalSettingsFile,omitempty"`
+	FetchCoordinates            bool     `json:"fetchCoordinates,omitempty"`
-	IncludeCommitID        bool   `json:"includeCommitId,omitempty"`
+	FilePath                    string   `json:"filePath,omitempty"`
-	M2Path                 string `json:"m2Path,omitempty"`
+	GlobalSettingsFile          string   `json:"globalSettingsFile,omitempty"`
-	Password               string `json:"password,omitempty"`
+	IncludeCommitID             bool     `json:"includeCommitId,omitempty"`
-	ProjectSettingsFile    string `json:"projectSettingsFile,omitempty"`
+	M2Path                      string   `json:"m2Path,omitempty"`
-	ShortCommitID          bool   `json:"shortCommitId,omitempty"`
+	Password                    string   `json:"password,omitempty"`
-	TagPrefix              string `json:"tagPrefix,omitempty"`
+	ProjectSettingsFile         string   `json:"projectSettingsFile,omitempty"`
-	UnixTimestamp          bool   `json:"unixTimestamp,omitempty"`
+	ShortCommitID               bool     `json:"shortCommitId,omitempty"`
-	Username               string `json:"username,omitempty"`
+	TagPrefix                   string   `json:"tagPrefix,omitempty"`
-	VersioningTemplate     string `json:"versioningTemplate,omitempty"`
+	UnixTimestamp               bool     `json:"unixTimestamp,omitempty"`
-	VersioningType         string `json:"versioningType,omitempty" validate:"possible-values=cloud cloud_noTag library"`
+	Username                    string   `json:"username,omitempty"`
+	VersioningTemplate          string   `json:"versioningTemplate,omitempty"`
+	VersioningType              string   `json:"versioningType,omitempty" validate:"possible-values=cloud cloud_noTag library"`
 }
 
 type artifactPrepareVersionCommonPipelineEnvironment struct {
@@ -236,6 +238,8 @@ Define ` + "`" + `buildTool: custom` + "`" + `, ` + "`" + `filePath: <path to yo
 }
 
 func addArtifactPrepareVersionFlags(cmd *cobra.Command, stepConfig *artifactPrepareVersionOptions) {
+	cmd.Flags().StringSliceVar(&stepConfig.AdditionalTargetTools, "additionalTargetTools", []string{}, "Additional buildTool targets where descriptors need to be updated besides the main `buildTool`.")
+	cmd.Flags().StringSliceVar(&stepConfig.AdditionalTargetDescriptors, "additionalTargetDescriptors", []string{}, "Defines patterns for build descriptors which should be used for option [`additionalTargetTools`](additionaltargettools).")
 	cmd.Flags().StringVar(&stepConfig.BuildTool, "buildTool", os.Getenv("PIPER_buildTool"), "Defines the tool which is used for building the artifact.")
 	cmd.Flags().StringVar(&stepConfig.CommitUserName, "commitUserName", `Project Piper`, "Defines the user name which appears in version control for the versioning update (in case `versioningType: cloud`).")
 	cmd.Flags().StringVar(&stepConfig.CustomVersionField, "customVersionField", os.Getenv("PIPER_customVersionField"), "For `buildTool: custom`: Defines the field which contains the version in the descriptor file.")
@@ -274,6 +278,24 @@ func artifactPrepareVersionMetadata() config.StepData {
 					{Name: "gitSshKeyCredentialsId", Description: "Jenkins 'SSH Username with private key' credentials ID ssh key for accessing your git repository. You can find details about how to generate an ssh key in the [GitHub documentation](https://docs.github.com/en/enterprise/2.15/user/articles/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent).", Type: "jenkins", Aliases: []config.Alias{{Name: "gitCredentialsId", Deprecated: true}}},
 				},
 				Parameters: []config.StepParameters{
+					{
+						Name:        "additionalTargetTools",
+						ResourceRef: []config.ResourceReference{},
+						Scope:       []string{"PARAMETERS", "STAGES", "STEPS"},
+						Type:        "[]string",
+						Mandatory:   false,
+						Aliases:     []config.Alias{},
+						Default:     []string{},
+					},
+					{
+						Name:        "additionalTargetDescriptors",
+						ResourceRef: []config.ResourceReference{},
+						Scope:       []string{"PARAMETERS", "STAGES", "STEPS"},
+						Type:        "[]string",
+						Mandatory:   false,
+						Aliases:     []config.Alias{},
+						Default:     []string{},
+					},
 					{
 						Name:        "buildTool",
 						ResourceRef: []config.ResourceReference{},

cmd/artifactPrepareVersion_test.go

@@ -2,19 +2,23 @@ package cmd
 
 import (
 	"fmt"
+	"net/http"
 	"testing"
 	"time"
 
+	"github.com/SAP/jenkins-library/pkg/mock"
+	"github.com/SAP/jenkins-library/pkg/telemetry"
 	"github.com/SAP/jenkins-library/pkg/versioning"
 
-	"github.com/SAP/jenkins-library/pkg/telemetry"
+	"github.com/ghodss/yaml"
 	"github.com/stretchr/testify/assert"
+	"helm.sh/helm/v3/pkg/chart"
 
 	"github.com/go-git/go-git/v5"
 	gitConfig "github.com/go-git/go-git/v5/config"
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/object"
-	"github.com/go-git/go-git/v5/plumbing/transport/http"
+	gitHttp "github.com/go-git/go-git/v5/plumbing/transport/http"
 	"github.com/go-git/go-git/v5/plumbing/transport/ssh"
 )
 
@@ -166,6 +170,24 @@ func (w *gitWorktreeMock) Commit(msg string, opts *git.CommitOptions) (plumbing.
 	return w.commitHash, nil
 }
 
+type artifactPrepareVersionMockUtils struct {
+	*mock.ExecMockRunner
+	*mock.FilesMock
+}
+
+func newArtifactPrepareVersionMockUtils() *artifactPrepareVersionMockUtils {
+	utils := artifactPrepareVersionMockUtils{
+		ExecMockRunner: &mock.ExecMockRunner{},
+		FilesMock:      &mock.FilesMock{},
+	}
+	return &utils
+}
+
+func (a *artifactPrepareVersionMockUtils) DownloadFile(url, filename string, header http.Header, cookies []*http.Cookie) error {
+	// so far no dedicated logic required for testing
+	return nil
+}
+
 func TestRunArtifactPrepareVersion(t *testing.T) {
 
 	t.Run("success case - cloud", func(t *testing.T) {
@@ -579,7 +601,7 @@ func TestPushChanges(t *testing.T) {
 		assert.Equal(t, &git.CommitOptions{All: true, Author: &object.Signature{Name: "Project Piper", When: testTime}}, worktree.commitOpts)
 		assert.Equal(t, "1.2.3", repo.tag)
 		assert.Equal(t, "428ecf70bc22df0ba3dcf194b5ce53e769abab07", repo.tagHash.String())
-		assert.Equal(t, &git.PushOptions{RefSpecs: []gitConfig.RefSpec{"refs/tags/1.2.3:refs/tags/1.2.3"}, Auth: &http.BasicAuth{Username: config.Username, Password: config.Password}}, repo.pushOptions)
+		assert.Equal(t, &git.PushOptions{RefSpecs: []gitConfig.RefSpec{"refs/tags/1.2.3:refs/tags/1.2.3"}, Auth: &gitHttp.BasicAuth{Username: config.Username, Password: config.Password}}, repo.pushOptions)
 	})
 
 	t.Run("success - ssh fallback", func(t *testing.T) {
@@ -724,3 +746,79 @@ func TestConvertHTTPToSSHURL(t *testing.T) {
 		assert.Equal(t, test.expected, convertHTTPToSSHURL(test.httpURL))
 	}
 }
+
+func TestPropagateVersion(t *testing.T) {
+	t.Parallel()
+
+	gitCommitID := "theGitCommitId"
+	testTime := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC) //20200101000000
+
+	t.Run("success case", func(t *testing.T) {
+		config := artifactPrepareVersionOptions{
+			VersioningType:        "cloud",
+			AdditionalTargetTools: []string{"helm"},
+		}
+
+		chartMetadata := chart.Metadata{Version: "1.2.3"}
+		content, err := yaml.Marshal(chartMetadata)
+		assert.NoError(t, err)
+
+		utils := newArtifactPrepareVersionMockUtils()
+		utils.AddFile("myChart/Chart.yaml", content)
+		artifactOpts := versioning.Options{}
+
+		err = propagateVersion(&config, utils, &artifactOpts, "1.2.4", gitCommitID, testTime)
+		assert.NoError(t, err)
+	})
+
+	t.Run("success case - dedicated build descriptors", func(t *testing.T) {
+		config := artifactPrepareVersionOptions{
+			VersioningType:              "cloud",
+			AdditionalTargetTools:       []string{"helm"},
+			AdditionalTargetDescriptors: []string{"myChart/Chart.yaml"},
+		}
+
+		chartMetadata := chart.Metadata{Version: "1.2.3"}
+		content, err := yaml.Marshal(chartMetadata)
+		assert.NoError(t, err)
+
+		utils := newArtifactPrepareVersionMockUtils()
+		utils.AddFile("myChart/Chart.yaml", content)
+		artifactOpts := versioning.Options{}
+
+		err = propagateVersion(&config, utils, &artifactOpts, "1.2.4", gitCommitID, testTime)
+		assert.NoError(t, err)
+	})
+
+	t.Run("success case - noop", func(t *testing.T) {
+		config := artifactPrepareVersionOptions{}
+		utils := newArtifactPrepareVersionMockUtils()
+		artifactOpts := versioning.Options{}
+
+		err := propagateVersion(&config, utils, &artifactOpts, "1.2.4", gitCommitID, testTime)
+		assert.NoError(t, err)
+	})
+
+	t.Run("error case - wrong config", func(t *testing.T) {
+		config := artifactPrepareVersionOptions{
+			AdditionalTargetDescriptors: []string{"pom.xml"},
+			AdditionalTargetTools:       []string{"maven", "helm"},
+		}
+		utils := newArtifactPrepareVersionMockUtils()
+		artifactOpts := versioning.Options{}
+
+		err := propagateVersion(&config, utils, &artifactOpts, "1.2.4", gitCommitID, testTime)
+		assert.EqualError(t, err, "additionalTargetDescriptors cannot have a different number of entries than additionalTargetTools")
+	})
+
+	t.Run("error case - wrong target tool", func(t *testing.T) {
+		config := artifactPrepareVersionOptions{
+			AdditionalTargetTools: []string{"notKnown"},
+		}
+		utils := newArtifactPrepareVersionMockUtils()
+		artifactOpts := versioning.Options{}
+
+		err := propagateVersion(&config, utils, &artifactOpts, "1.2.4", gitCommitID, testTime)
+		assert.Contains(t, fmt.Sprint(err), "failed to retrieve artifact")
+	})
+}

pkg/versioning/helm.go

@@ -0,0 +1,96 @@
+package versioning
+
+import (
+	"fmt"
+
+	"github.com/ghodss/yaml"
+	"helm.sh/helm/v3/pkg/chart"
+)
+
+// JSONfile defines an artifact using a json file for versioning
+type HelmChart struct {
+	path             string
+	metadata         chart.Metadata
+	utils            Utils
+	updateAppVersion bool
+}
+
+func (h *HelmChart) init() error {
+	if h.utils == nil {
+		return fmt.Errorf("no file utils provided")
+	}
+	if len(h.path) == 0 {
+		charts, err := h.utils.Glob("**/Chart.yaml")
+		if len(charts) == 0 || err != nil {
+			return fmt.Errorf("failed to find a helm chart file")
+		}
+		// use first chart which can be found
+		h.path = charts[0]
+	}
+
+	if len(h.metadata.Version) == 0 {
+		content, err := h.utils.FileRead(h.path)
+		if err != nil {
+			return fmt.Errorf("failed to read file '%v': %w", h.path, err)
+		}
+
+		err = yaml.Unmarshal(content, &h.metadata)
+		if err != nil {
+			return fmt.Errorf("helm chart content invalid '%v': %w", h.path, err)
+		}
+	}
+
+	return nil
+}
+
+// VersioningScheme returns the relevant versioning scheme
+func (h *HelmChart) VersioningScheme() string {
+	return "semver2"
+}
+
+// GetVersion returns the current version of the artifact with a JSON-based build descriptor
+func (h *HelmChart) GetVersion() (string, error) {
+	if err := h.init(); err != nil {
+		return "", fmt.Errorf("failed to init helm chart versioning: %w", err)
+	}
+
+	return h.metadata.Version, nil
+}
+
+// SetVersion updates the version of the artifact with a JSON-based build descriptor
+func (h *HelmChart) SetVersion(version string) error {
+	if err := h.init(); err != nil {
+		return fmt.Errorf("failed to init helm chart versioning: %w", err)
+	}
+
+	h.metadata.Version = version
+	if h.updateAppVersion {
+		h.metadata.AppVersion = version
+	}
+
+	content, err := yaml.Marshal(h.metadata)
+	if err != nil {
+		return fmt.Errorf("failed to create chart content for '%v': %w", h.path, err)
+	}
+	err = h.utils.FileWrite(h.path, content, 666)
+	if err != nil {
+		return fmt.Errorf("failed to write file '%v': %w", h.path, err)
+	}
+
+	return nil
+}
+
+// GetCoordinates returns the coordinates
+func (h *HelmChart) GetCoordinates() (Coordinates, error) {
+	result := Coordinates{}
+	projectVersion, err := h.GetVersion()
+	if err != nil {
+		return result, err
+	}
+
+	result.ArtifactID = h.metadata.Name
+	result.Version = projectVersion
+	result.GroupID = h.metadata.Home
+
+	return result, nil
+}

pkg/versioning/helm_test.go

@@ -0,0 +1,218 @@
+package versioning
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/ghodss/yaml"
+	"github.com/stretchr/testify/assert"
+	"helm.sh/helm/v3/pkg/chart"
+)
+
+func TestHelmChartInit(t *testing.T) {
+	t.Run("success case", func(t *testing.T) {
+		chartMetadata := chart.Metadata{Version: "1.2.3"}
+		content, err := yaml.Marshal(chartMetadata)
+		assert.NoError(t, err)
+
+		fileUtils := newVersioningMockUtils()
+		fileUtils.AddFile("testchart/Chart.yaml", content)
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+		}
+
+		err = helmChart.init()
+
+		assert.NoError(t, err)
+		assert.Equal(t, "1.2.3", helmChart.metadata.Version)
+	})
+
+	t.Run("success case - with chart path", func(t *testing.T) {
+		chartMetadata := chart.Metadata{Version: "1.2.3"}
+		content, err := yaml.Marshal(chartMetadata)
+		assert.NoError(t, err)
+
+		fileUtils := newVersioningMockUtils()
+		fileUtils.AddFile("chart1/Chart.yaml", []byte(""))
+		fileUtils.AddFile("chart2/Chart.yaml", content)
+		fileUtils.AddFile("chart3/Chart.yaml", []byte(""))
+
+		helmChart := HelmChart{
+			path:  "chart2/Chart.yaml",
+			utils: fileUtils,
+		}
+
+		err = helmChart.init()
+
+		assert.NoError(t, err)
+		assert.Equal(t, "1.2.3", helmChart.metadata.Version)
+	})
+
+	t.Run("error case - init failed with missing utils", func(t *testing.T) {
+		helmChart := HelmChart{
+			path: "chart2/Chart.yaml",
+		}
+
+		err := helmChart.init()
+		assert.EqualError(t, err, "no file utils provided")
+	})
+
+	t.Run("error case - init failed with missing chart", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+		}
+
+		err := helmChart.init()
+		assert.EqualError(t, err, "failed to find a helm chart file")
+	})
+
+	t.Run("error case - failed reading file", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+		fileUtils.FileReadErrors = map[string]error{"testchart/Chart.yaml": fmt.Errorf("read error")}
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+			path:  "testchart/Chart.yaml",
+		}
+
+		err := helmChart.init()
+		assert.EqualError(t, err, "failed to read file 'testchart/Chart.yaml': read error")
+	})
+
+	t.Run("error case - chart invalid", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+		fileUtils.AddFile("testchart/Chart.yaml", []byte("{"))
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+			path:  "testchart/Chart.yaml",
+		}
+
+		err := helmChart.init()
+		assert.Contains(t, fmt.Sprint(err), "helm chart content invalid 'testchart/Chart.yaml'")
+	})
+}
+
+func TestHelmChartVersioningScheme(t *testing.T) {
+	helmChart := HelmChart{}
+	assert.Equal(t, "semver2", helmChart.VersioningScheme())
+}
+
+func TestHelmChartGetVersion(t *testing.T) {
+	t.Run("success case", func(t *testing.T) {
+		chartMetadata := chart.Metadata{Version: "1.2.3"}
+		content, err := yaml.Marshal(chartMetadata)
+		assert.NoError(t, err)
+
+		fileUtils := newVersioningMockUtils()
+		fileUtils.AddFile("testchart/Chart.yaml", content)
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+		}
+
+		version, err := helmChart.GetVersion()
+		assert.NoError(t, err)
+		assert.Equal(t, "1.2.3", version)
+	})
+
+	t.Run("error case - init failed", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+		}
+
+		_, err := helmChart.GetVersion()
+		assert.Contains(t, fmt.Sprint(err), "failed to init helm chart versioning:")
+	})
+}
+
+func TestHelmChartSetVersion(t *testing.T) {
+	t.Run("success case", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+
+		helmChart := HelmChart{
+			utils:    fileUtils,
+			path:     "testchart/Chart.yaml",
+			metadata: chart.Metadata{Version: "1.2.3"},
+		}
+
+		err := helmChart.SetVersion("1.2.4")
+		assert.NoError(t, err)
+		assert.Equal(t, "1.2.4", helmChart.metadata.Version)
+
+		fileContent, err := fileUtils.FileRead("testchart/Chart.yaml")
+		assert.NoError(t, err)
+		assert.Contains(t, string(fileContent), "version: 1.2.4")
+	})
+
+	t.Run("success case - update app version", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+
+		helmChart := HelmChart{
+			utils:            fileUtils,
+			path:             "testchart/Chart.yaml",
+			metadata:         chart.Metadata{Version: "1.2.3"},
+			updateAppVersion: true,
+		}
+
+		err := helmChart.SetVersion("1.2.4")
+		assert.NoError(t, err)
+		assert.Equal(t, "1.2.4", helmChart.metadata.AppVersion)
+	})
+
+	t.Run("error case - init failed with missing chart", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+		}
+
+		err := helmChart.SetVersion("1.2.4")
+		assert.Contains(t, fmt.Sprint(err), "failed to init helm chart versioning:")
+	})
+
+	t.Run("error case - failed to write chart", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+		fileUtils.FileWriteError = fmt.Errorf("write error")
+
+		helmChart := HelmChart{
+			path:     "testchart/Chart.yaml",
+			utils:    fileUtils,
+			metadata: chart.Metadata{Version: "1.2.3"},
+		}
+
+		err := helmChart.SetVersion("1.2.4")
+		assert.EqualError(t, err, "failed to write file 'testchart/Chart.yaml': write error")
+	})
+}
+
+func TestHelmChartGetCoordinates(t *testing.T) {
+	t.Run("success case", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+		helmChart := HelmChart{
+			utils:    fileUtils,
+			path:     "testchart/Chart.yaml",
+			metadata: chart.Metadata{Version: "1.2.3", Name: "myChart", Home: "myHome"},
+		}
+
+		coordinates, err := helmChart.GetCoordinates()
+		assert.NoError(t, err)
+		assert.Equal(t, Coordinates{GroupID: "myHome", ArtifactID: "myChart", Version: "1.2.3"}, coordinates)
+	})
+
+	t.Run("error case - version retrieval failed", func(t *testing.T) {
+		fileUtils := newVersioningMockUtils()
+
+		helmChart := HelmChart{
+			utils: fileUtils,
+		}
+
+		_, err := helmChart.GetCoordinates()
+		assert.Contains(t, fmt.Sprint(err), "failed to init helm chart versioning:")
+	})
+}

pkg/versioning/versioning.go

@@ -27,14 +27,15 @@ type Artifact interface {
 
 // Options define build tool specific settings in order to properly retrieve e.g. the version / coordinates of an artifact
 type Options struct {
-	ProjectSettingsFile string
+	ProjectSettingsFile  string
-	DockerImage         string
+	DockerImage          string
-	GlobalSettingsFile  string
+	GlobalSettingsFile   string
-	M2Path              string
+	M2Path               string
-	VersionSource       string
+	VersionSource        string
-	VersionSection      string
+	VersionSection       string
-	VersionField        string
+	VersionField         string
-	VersioningScheme    string
+	VersioningScheme     string
+	HelmUpdateAppVersion bool
 }
 
 // Utils defines the versioning operations for various build tools
@@ -106,6 +107,12 @@ func GetArtifact(buildTool, buildDescriptorFilePath string, opts *Options, utils
 		default:
 			artifact = &Versionfile{path: buildDescriptorFilePath}
 		}
+	case "helm":
+		artifact = &HelmChart{
+			path:             buildDescriptorFilePath,
+			utils:            utils,
+			updateAppVersion: opts.HelmUpdateAppVersion,
+		}
 	case "maven":
 		if len(buildDescriptorFilePath) == 0 {
 			buildDescriptorFilePath = "pom.xml"

pkg/versioning/versioning_test.go

@@ -1,11 +1,31 @@
 package versioning
 
 import (
+	"net/http"
 	"testing"
 
+	"github.com/SAP/jenkins-library/pkg/mock"
 	"github.com/stretchr/testify/assert"
 )
 
+type versioningMockUtils struct {
+	*mock.ExecMockRunner
+	*mock.FilesMock
+}
+
+func newVersioningMockUtils() *versioningMockUtils {
+	utils := versioningMockUtils{
+		ExecMockRunner: &mock.ExecMockRunner{},
+		FilesMock:      &mock.FilesMock{},
+	}
+	return &utils
+}
+
+func (v *versioningMockUtils) DownloadFile(url, filename string, header http.Header, cookies []*http.Cookie) error {
+	// so far no dedicated logic required for testing
+	return nil
+}
+
 func TestGetArtifact(t *testing.T) {
 	t.Run("custom", func(t *testing.T) {
 		custom, err := GetArtifact("custom", "test.ini", &Options{VersionField: "theversion", VersionSection: "test"}, nil)
@@ -76,6 +96,17 @@ func TestGetArtifact(t *testing.T) {
 		assert.Equal(t, "semver2", gradle.VersioningScheme())
 	})
 
+	t.Run("helm", func(t *testing.T) {
+		helm, err := GetArtifact("helm", "testchart/Chart.yaml", &Options{}, nil)
+
+		assert.NoError(t, err)
+
+		theType, ok := helm.(*HelmChart)
+		assert.True(t, ok)
+		assert.Equal(t, "testchart/Chart.yaml", theType.path)
+		assert.Equal(t, "semver2", helm.VersioningScheme())
+	})
+
 	t.Run("maven", func(t *testing.T) {
 		opts := Options{
 			ProjectSettingsFile: "projectsettings.xml",

resources/metadata/artifactPrepareVersion.yaml

@@ -82,6 +82,53 @@ spec:
           - name: gitCredentialsId
             deprecated: true
     params:
+      - name: additionalTargetTools
+        type: "[]string"
+        description: Additional buildTool targets where descriptors need to be updated besides the main `buildTool`.
+        longDescription: |
+          **Only for versioning types `cloud` and `cloud_noTag`.** This parameter allows you to propagate the version to other build-tool specific descriptors.
+          If the parameter [`additionalTargetDescriptors`](#additionaltargetdescriptors) is not defined the default build descriptors are used.
+
+          One example is to propagate the version into a helm chart.
+          This can be achieved like
+
+          ```
+          steps:
+            artifactPrepareVersion:
+              additionalTargetTools:
+                - helm
+          ```
+        scope:
+          - PARAMETERS
+          - STAGES
+          - STEPS
+        possibleValues:
+          - custom
+          - docker
+          - dub
+          - golang
+          - gradle
+          - helm
+          - maven
+          - mta
+          - npm
+          - pip
+          - sbt
+          - yarn
+      - name: additionalTargetDescriptors
+        type: "[]string"
+        description: Defines patterns for build descriptors which should be used for option [`additionalTargetTools`](additionaltargettools).
+        longDescription: |
+          **Only for versioning types `cloud` and `cloud_noTag`.** In case default build descriptors cannot be used for [`additionalTargetTools`](additionaltargettools) this parameter allows to define a dedicated search pattern per build tool.
+          For each entry in [`additionalTargetTools`](additionaltargettools) a dedicated entry has to be maintained.
+
+          You can use either a file name or a glob pattern like `**/package.json`.
+
+          For `helm` the default value is `**/Chart.yaml`, thus typically no adaptions are required.
+        scope:
+          - PARAMETERS
+          - STAGES
+          - STEPS
       - name: buildTool
         type: string
         description: Defines the tool which is used for building the artifact.
@@ -97,6 +144,7 @@ spec:
           - dub
           - golang
           - gradle
+          - helm
           - maven
           - mta
           - npm