feat: Add possibility to specify write-back GIT repository as annotation

.github/workflows/ci-tests.yaml

@@ -57,7 +57,7 @@ jobs:
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v2
         with:
-          version: v1.46.2
+          version: v1.52.2
           args: --timeout 5m
   test:
     name: Ensure unit tests are passing

.golangci.yml

@@ -7,15 +7,13 @@ run:
 linters:
   enable:
     - vet
-    - deadcode
     - goimports
-    - varcheck
-    - structcheck
     - ineffassign
     - unconvert
     - unparam
+    - unused
 linters-settings:
   goimports:
     local-prefixes: github.com/argoproj-labs/argocd-image-updater
 service:
-  golangci-lint-version: 1.26.0
+  golangci-lint-version: 1.52.2

docs/basics/update-methods.md

@@ -144,6 +144,22 @@ kubectl -n argocd-image-updater create secret generic git-creds \
   --from-file=sshPrivateKey=~/.ssh/id_rsa
 ```
 
+### <a name="method-git-repository"></a>Specifying a repository when using a Helm repository in repoURL
+
+By default, Argo CD Image Updater will use the value found in the Application
+spec at `.spec.source.repoURL` as Git repository to checkout. But when using
+a Helm repository as `.spec.source.repoURL` GIT will simply fail. To manually
+specify the repository to push the changes, specify the 
+annotation `argocd-image-updater.argoproj.io/git-repository` on the Application
+manifest.
+
+The value of this annotation will define the Git repository to use, for example the
+following would use a GitHub's repository:
+
+```yaml
+argocd-image-updater.argoproj.io/git-repository: git@github.com:example/example.git
+```
+
 ### <a name="method-git-branch"></a>Specifying a branch to commit to
 
 By default, Argo CD Image Updater will use the value found in the Application

ext/git/client.go

@@ -155,12 +155,12 @@ func NewClientExt(rawRepoURL string, root string, creds Creds, insecure bool, en
 
 // Returns a HTTP client object suitable for go-git to use using the following
 // pattern:
-// - If insecure is true, always returns a client with certificate verification
-//   turned off.
-// - If one or more custom certificates are stored for the repository, returns
-//   a client with those certificates in the list of root CAs used to verify
-//   the server's certificate.
-// - Otherwise (and on non-fatal errors), a default HTTP client is returned.
+//   - If insecure is true, always returns a client with certificate verification
+//     turned off.
+//   - If one or more custom certificates are stored for the repository, returns
+//     a client with those certificates in the list of root CAs used to verify
+//     the server's certificate.
+//   - Otherwise (and on non-fatal errors), a default HTTP client is returned.
 func GetRepoHTTPClient(repoURL string, insecure bool, creds Creds, proxyURL string) *http.Client {
 	// Default HTTP client
 	var customHTTPClient = &http.Client{

pkg/argocd/git.go

@@ -131,7 +131,7 @@ func commitChangesGit(app *v1alpha1.Application, wbc *WriteBackConfig, changeLis
 	logCtx := log.WithContext().AddField("application", app.GetName())
 	creds, err := wbc.GetCreds(app)
 	if err != nil {
-		return fmt.Errorf("could not get creds for repo '%s': %v", app.Spec.Source.RepoURL, err)
+		return fmt.Errorf("could not get creds for repo '%s': %v", wbc.GitRepo, err)
 	}
 	var gitC git.Client
 	if wbc.GitClient == nil {
@@ -145,7 +145,7 @@ func commitChangesGit(app *v1alpha1.Application, wbc *WriteBackConfig, changeLis
 				logCtx.Errorf("could not remove temp dir: %v", err)
 			}
 		}()
-		gitC, err = git.NewClientExt(app.Spec.Source.RepoURL, tempRoot, creds, false, false, "")
+		gitC, err = git.NewClientExt(wbc.GitRepo, tempRoot, creds, false, false, "")
 		if err != nil {
 			return err
 		}

pkg/argocd/gitcreds.go

@@ -14,39 +14,39 @@ import (
 )
 
 // getGitCredsSource returns git credentials source that loads credentials from the secret or from Argo CD settings
-func getGitCredsSource(creds string, kubeClient *kube.KubernetesClient) (GitCredsSource, error) {
+func getGitCredsSource(creds string, kubeClient *kube.KubernetesClient, wbc *WriteBackConfig) (GitCredsSource, error) {
 	switch {
 	case creds == "repocreds":
 		return func(app *v1alpha1.Application) (git.Creds, error) {
-			return getCredsFromArgoCD(app, kubeClient)
+			return getCredsFromArgoCD(wbc, kubeClient)
 		}, nil
 	case strings.HasPrefix(creds, "secret:"):
 		return func(app *v1alpha1.Application) (git.Creds, error) {
-			return getCredsFromSecret(app, creds[len("secret:"):], kubeClient)
+			return getCredsFromSecret(wbc, creds[len("secret:"):], kubeClient)
 		}, nil
 	}
 	return nil, fmt.Errorf("unexpected credentials format. Expected 'repocreds' or 'secret:<namespace>/<secret>' but got '%s'", creds)
 }
 
 // getCredsFromArgoCD loads repository credentials from Argo CD settings
-func getCredsFromArgoCD(app *v1alpha1.Application, kubeClient *kube.KubernetesClient) (git.Creds, error) {
+func getCredsFromArgoCD(wbc *WriteBackConfig, kubeClient *kube.KubernetesClient) (git.Creds, error) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
 	settingsMgr := settings.NewSettingsManager(ctx, kubeClient.Clientset, kubeClient.Namespace)
 	argocdDB := db.NewDB(kubeClient.Namespace, settingsMgr, kubeClient.Clientset)
-	repo, err := argocdDB.GetRepository(ctx, app.Spec.Source.RepoURL)
+	repo, err := argocdDB.GetRepository(ctx, wbc.GitRepo)
 	if err != nil {
 		return nil, err
 	}
 	if !repo.HasCredentials() {
-		return nil, fmt.Errorf("credentials for '%s' are not configured in Argo CD settings", app.Spec.Source.RepoURL)
+		return nil, fmt.Errorf("credentials for '%s' are not configured in Argo CD settings", wbc.GitRepo)
 	}
 	return repo.GetGitCreds(), nil
 }
 
 // getCredsFromSecret loads repository credentials from secret
-func getCredsFromSecret(app *v1alpha1.Application, credentialsSecret string, kubeClient *kube.KubernetesClient) (git.Creds, error) {
+func getCredsFromSecret(wbc *WriteBackConfig, credentialsSecret string, kubeClient *kube.KubernetesClient) (git.Creds, error) {
 	var credentials map[string][]byte
 	var err error
 	s := strings.SplitN(credentialsSecret, "/", 2)
@@ -59,13 +59,13 @@ func getCredsFromSecret(app *v1alpha1.Application, credentialsSecret string, kub
 		return nil, fmt.Errorf("secret ref must be in format 'namespace/name', but is '%s'", credentialsSecret)
 	}
 
-	if ok, _ := git.IsSSHURL(app.Spec.Source.RepoURL); ok {
+	if ok, _ := git.IsSSHURL(wbc.GitRepo); ok {
 		var sshPrivateKey []byte
 		if sshPrivateKey, ok = credentials["sshPrivateKey"]; !ok {
 			return nil, fmt.Errorf("invalid secret %s: does not contain field sshPrivateKey", credentialsSecret)
 		}
 		return git.NewSSHCreds(string(sshPrivateKey), "", true), nil
-	} else if git.IsHTTPSURL(app.Spec.Source.RepoURL) {
+	} else if git.IsHTTPSURL(wbc.GitRepo) {
 		var username, password []byte
 		if username, ok = credentials["username"]; !ok {
 			return nil, fmt.Errorf("invalid secret %s: does not contain field username", credentialsSecret)

pkg/argocd/update.go

@@ -68,6 +68,7 @@ type WriteBackConfig struct {
 	GitCommitMessage string
 	KustomizeBase    string
 	Target           string
+	GitRepo          string
 }
 
 // The following are helper structs to only marshal the fields we require
@@ -476,7 +477,12 @@ func parseGitConfig(app *v1alpha1.Application, kubeClient *kube.KubernetesClient
 			wbc.GitWriteBranch = branches[1]
 		}
 	}
-	credsSource, err := getGitCredsSource(creds, kubeClient)
+	wbc.GitRepo = app.Spec.Source.RepoURL
+	repo, ok := app.Annotations[common.GitRepositoryAnnotation]
+	if ok {
+		wbc.GitRepo = repo
+	}
+	credsSource, err := getGitCredsSource(creds, kubeClient, wbc)
 	if err != nil {
 		return fmt.Errorf("invalid git credentials source: %v", err)
 	}
@@ -486,7 +492,7 @@ func parseGitConfig(app *v1alpha1.Application, kubeClient *kube.KubernetesClient
 
 func commitChangesLocked(app *v1alpha1.Application, wbc *WriteBackConfig, state *SyncIterationState, changeList []ChangeEntry) error {
 	if wbc.RequiresLocking() {
-		lock := state.GetRepositoryLock(app.Spec.Source.RepoURL)
+		lock := state.GetRepositoryLock(wbc.GitRepo)
 		lock.Lock()
 		defer lock.Unlock()
 	}

pkg/argocd/update_test.go

@@ -1691,6 +1691,48 @@ func Test_GetGitCreds(t *testing.T) {
 		require.Error(t, err)
 		require.Nil(t, creds)
 	})
+
+	t.Run("SSH creds from Argo CD settings with Helm Chart repoURL", func(t *testing.T) {
+		argoClient := argomock.ArgoCD{}
+		argoClient.On("UpdateSpec", mock.Anything, mock.Anything).Return(nil, nil)
+		secret := fixture.NewSecret("argocd-image-updater", "git-creds", map[string][]byte{
+			"sshPrivateKey": []byte("foo"),
+		})
+		kubeClient := kube.KubernetesClient{
+			Clientset: fake.NewFakeClientsetWithResources(secret),
+		}
+
+		app := v1alpha1.Application{
+			ObjectMeta: v1.ObjectMeta{
+				Name: "testapp",
+				Annotations: map[string]string{
+					"argocd-image-updater.argoproj.io/image-list":        "nginx",
+					"argocd-image-updater.argoproj.io/write-back-method": "git:secret:argocd-image-updater/git-creds",
+					"argocd-image-updater.argoproj.io/git-repository":    "git@github.com:example/example.git",
+				},
+			},
+			Spec: v1alpha1.ApplicationSpec{
+				Source: v1alpha1.ApplicationSource{
+					RepoURL:        "https://example-helm-repo.com/example",
+					TargetRevision: "main",
+				},
+			},
+			Status: v1alpha1.ApplicationStatus{
+				SourceType: v1alpha1.ApplicationSourceTypeKustomize,
+			},
+		}
+
+		wbc, err := getWriteBackConfig(&app, &kubeClient, &argoClient)
+		require.NoError(t, err)
+		require.Equal(t, wbc.GitRepo, "git@github.com:example/example.git")
+
+		creds, err := wbc.GetCreds(&app)
+		require.NoError(t, err)
+		require.NotNil(t, creds)
+		// Must have SSH creds
+		_, ok := creds.(git.SSHCreds)
+		require.True(t, ok)
+	})
 }
 
 func Test_CommitUpdates(t *testing.T) {

pkg/common/constants.go

@@ -50,6 +50,7 @@ const (
 const (
 	WriteBackMethodAnnotation = ImageUpdaterAnnotationPrefix + "/write-back-method"
 	GitBranchAnnotation       = ImageUpdaterAnnotationPrefix + "/git-branch"
+	GitRepositoryAnnotation   = ImageUpdaterAnnotationPrefix + "/git-repository"
 	WriteBackTargetAnnotation = ImageUpdaterAnnotationPrefix + "/write-back-target"
 	KustomizationPrefix       = "kustomization"
 )