feat: add gitea bootstrapper

Signed-off-by: Jabar Asadi <jasadi@d2iq.com>

cmd/flux/bootstrap_gitea.go

@@ -0,0 +1,275 @@
+/*
+Copyright 2023 The Flux authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/fluxcd/pkg/git"
+	"github.com/fluxcd/pkg/git/gogit"
+	"github.com/spf13/cobra"
+
+	"github.com/fluxcd/flux2/v2/internal/flags"
+	"github.com/fluxcd/flux2/v2/internal/utils"
+	"github.com/fluxcd/flux2/v2/pkg/bootstrap"
+	"github.com/fluxcd/flux2/v2/pkg/bootstrap/provider"
+	"github.com/fluxcd/flux2/v2/pkg/manifestgen"
+	"github.com/fluxcd/flux2/v2/pkg/manifestgen/install"
+	"github.com/fluxcd/flux2/v2/pkg/manifestgen/sourcesecret"
+	"github.com/fluxcd/flux2/v2/pkg/manifestgen/sync"
+)
+
+var bootstrapGiteaCmd = &cobra.Command{
+	Use:   "gitea",
+	Short: "Deploy Flux on a cluster connected to a Gitea repository",
+	Long: `The bootstrap gitea command creates the Gitea repository if it doesn't exists and
+commits the Flux manifests to the specified branch.
+Then it configures the target cluster to synchronize with that repository.
+If the Flux components are present on the cluster,
+the bootstrap command will perform an upgrade if needed.`,
+	Example: `  # Create a Gitea personal access token and export it as an env var
+  export GITEA_TOKEN=<my-token>
+
+  # Run bootstrap for a private repository owned by a Gitea organization
+  flux bootstrap gitea --owner=<organization> --repository=<repository name> --path=clusters/my-cluster
+
+  # Run bootstrap for a private repository and assign organization teams to it
+  flux bootstrap gitea --owner=<organization> --repository=<repository name> --team=<team1 slug> --team=<team2 slug> --path=clusters/my-cluster
+
+  # Run bootstrap for a private repository and assign organization teams with their access level(e.g maintain, admin) to it
+  flux bootstrap gitea --owner=<organization> --repository=<repository name> --team=<team1 slug>:<access-level> --path=clusters/my-cluster
+
+  # Run bootstrap for a public repository on a personal account
+  flux bootstrap gitea --owner=<user> --repository=<repository name> --private=false --personal=true --path=clusters/my-cluster
+
+  # Run bootstrap for a private repository hosted on Gitea Enterprise using SSH auth
+  flux bootstrap gitea --owner=<organization> --repository=<repository name> --hostname=<domain> --ssh-hostname=<domain> --path=clusters/my-cluster
+
+  # Run bootstrap for a private repository hosted on Gitea Enterprise using HTTPS auth
+  flux bootstrap gitea --owner=<organization> --repository=<repository name> --hostname=<domain> --token-auth --path=clusters/my-cluster
+
+  # Run bootstrap for an existing repository with a branch named main
+  flux bootstrap gitea --owner=<organization> --repository=<repository name> --branch=main --path=clusters/my-cluster`,
+	RunE: bootstrapGiteaCmdRun,
+}
+
+type giteaFlags struct {
+	owner        string
+	repository   string
+	interval     time.Duration
+	personal     bool
+	private      bool
+	hostname     string
+	path         flags.SafeRelativePath
+	teams        []string
+	readWriteKey bool
+	reconcile    bool
+}
+
+const (
+	gtDefaultPermission = "maintain"
+	gtDefaultDomain     = "gitea.com"
+	gtTokenEnvVar       = "GITEA_TOKEN"
+)
+
+var giteaArgs giteaFlags
+
+func init() {
+	bootstrapGiteaCmd.Flags().StringVar(&giteaArgs.owner, "owner", "", "Gitea user or organization name")
+	bootstrapGiteaCmd.Flags().StringVar(&giteaArgs.repository, "repository", "", "Gitea repository name")
+	bootstrapGiteaCmd.Flags().StringSliceVar(&giteaArgs.teams, "team", []string{}, "Gitea team and the access to be given to it(team:maintain). Defaults to maintainer access if no access level is specified (also accepts comma-separated values)")
+	bootstrapGiteaCmd.Flags().BoolVar(&giteaArgs.personal, "personal", false, "if true, the owner is assumed to be a Gitea user; otherwise an org")
+	bootstrapGiteaCmd.Flags().BoolVar(&giteaArgs.private, "private", true, "if true, the repository is setup or configured as private")
+	bootstrapGiteaCmd.Flags().DurationVar(&giteaArgs.interval, "interval", time.Minute, "sync interval")
+	bootstrapGiteaCmd.Flags().StringVar(&giteaArgs.hostname, "hostname", gtDefaultDomain, "Gitea hostname")
+	bootstrapGiteaCmd.Flags().Var(&giteaArgs.path, "path", "path relative to the repository root, when specified the cluster sync will be scoped to this path")
+	bootstrapGiteaCmd.Flags().BoolVar(&giteaArgs.readWriteKey, "read-write-key", false, "if true, the deploy key is configured with read/write permissions")
+	bootstrapGiteaCmd.Flags().BoolVar(&giteaArgs.reconcile, "reconcile", false, "if true, the configured options are also reconciled if the repository already exists")
+
+	bootstrapCmd.AddCommand(bootstrapGiteaCmd)
+}
+
+func bootstrapGiteaCmdRun(cmd *cobra.Command, args []string) error {
+	gtToken := os.Getenv(gtTokenEnvVar)
+	if gtToken == "" {
+		var err error
+		gtToken, err = readPasswordFromStdin("Please enter your Gitea personal access token (PAT): ")
+		if err != nil {
+			return fmt.Errorf("could not read token: %w", err)
+		}
+	}
+
+	if err := bootstrapValidate(); err != nil {
+		return err
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), rootArgs.timeout)
+	defer cancel()
+
+	kubeClient, err := utils.KubeClient(kubeconfigArgs, kubeclientOptions)
+	if err != nil {
+		return err
+	}
+
+	// Manifest base
+	if ver, err := getVersion(bootstrapArgs.version); err != nil {
+		return err
+	} else {
+		bootstrapArgs.version = ver
+	}
+	manifestsBase, err := buildEmbeddedManifestBase()
+	if err != nil {
+		return err
+	}
+	defer os.RemoveAll(manifestsBase)
+
+	var caBundle []byte
+	if bootstrapArgs.caFile != "" {
+		var err error
+		caBundle, err = os.ReadFile(bootstrapArgs.caFile)
+		if err != nil {
+			return fmt.Errorf("unable to read TLS CA file: %w", err)
+		}
+	}
+	// Build Gitea provider
+	providerCfg := provider.Config{
+		Provider: provider.GitProviderGitea,
+		Hostname: giteaArgs.hostname,
+		Token:    gtToken,
+		CaBundle: caBundle,
+	}
+	providerClient, err := provider.BuildGitProvider(providerCfg)
+	if err != nil {
+		return err
+	}
+
+	tmpDir, err := manifestgen.MkdirTempAbs("", "flux-bootstrap-")
+	if err != nil {
+		return fmt.Errorf("failed to create temporary working dir: %w", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	clientOpts := []gogit.ClientOption{gogit.WithDiskStorage(), gogit.WithFallbackToDefaultKnownHosts()}
+	gitClient, err := gogit.NewClient(tmpDir, &git.AuthOptions{
+		Transport: git.HTTPS,
+		Username:  giteaArgs.owner,
+		Password:  gtToken,
+		CAFile:    caBundle,
+	}, clientOpts...)
+	if err != nil {
+		return fmt.Errorf("failed to create a Git client: %w", err)
+	}
+
+	// Install manifest config
+	installOptions := install.Options{
+		BaseURL:                rootArgs.defaults.BaseURL,
+		Version:                bootstrapArgs.version,
+		Namespace:              *kubeconfigArgs.Namespace,
+		Components:             bootstrapComponents(),
+		Registry:               bootstrapArgs.registry,
+		ImagePullSecret:        bootstrapArgs.imagePullSecret,
+		WatchAllNamespaces:     bootstrapArgs.watchAllNamespaces,
+		NetworkPolicy:          bootstrapArgs.networkPolicy,
+		LogLevel:               bootstrapArgs.logLevel.String(),
+		NotificationController: rootArgs.defaults.NotificationController,
+		ManifestFile:           rootArgs.defaults.ManifestFile,
+		Timeout:                rootArgs.timeout,
+		TargetPath:             giteaArgs.path.ToSlash(),
+		ClusterDomain:          bootstrapArgs.clusterDomain,
+		TolerationKeys:         bootstrapArgs.tolerationKeys,
+	}
+	if customBaseURL := bootstrapArgs.manifestsPath; customBaseURL != "" {
+		installOptions.BaseURL = customBaseURL
+	}
+
+	// Source generation and secret config
+	secretOpts := sourcesecret.Options{
+		Name:         bootstrapArgs.secretName,
+		Namespace:    *kubeconfigArgs.Namespace,
+		TargetPath:   giteaArgs.path.ToSlash(),
+		ManifestFile: sourcesecret.MakeDefaultOptions().ManifestFile,
+	}
+	if bootstrapArgs.tokenAuth {
+		secretOpts.Username = "git"
+		secretOpts.Password = gtToken
+		secretOpts.CAFile = caBundle
+	} else {
+		secretOpts.PrivateKeyAlgorithm = sourcesecret.PrivateKeyAlgorithm(bootstrapArgs.keyAlgorithm)
+		secretOpts.RSAKeyBits = int(bootstrapArgs.keyRSABits)
+		secretOpts.ECDSACurve = bootstrapArgs.keyECDSACurve.Curve
+
+		secretOpts.SSHHostname = giteaArgs.hostname
+		if bootstrapArgs.sshHostname != "" {
+			secretOpts.SSHHostname = bootstrapArgs.sshHostname
+		}
+	}
+
+	// Sync manifest config
+	syncOpts := sync.Options{
+		Interval:          giteaArgs.interval,
+		Name:              *kubeconfigArgs.Namespace,
+		Namespace:         *kubeconfigArgs.Namespace,
+		Branch:            bootstrapArgs.branch,
+		Secret:            bootstrapArgs.secretName,
+		TargetPath:        giteaArgs.path.ToSlash(),
+		ManifestFile:      sync.MakeDefaultOptions().ManifestFile,
+		RecurseSubmodules: bootstrapArgs.recurseSubmodules,
+	}
+
+	entityList, err := bootstrap.LoadEntityListFromPath(bootstrapArgs.gpgKeyRingPath)
+	if err != nil {
+		return err
+	}
+
+	// Bootstrap config
+	bootstrapOpts := []bootstrap.GitProviderOption{
+		bootstrap.WithProviderRepository(giteaArgs.owner, giteaArgs.repository, giteaArgs.personal),
+		bootstrap.WithBranch(bootstrapArgs.branch),
+		bootstrap.WithBootstrapTransportType("https"),
+		bootstrap.WithSignature(bootstrapArgs.authorName, bootstrapArgs.authorEmail),
+		bootstrap.WithCommitMessageAppendix(bootstrapArgs.commitMessageAppendix),
+		bootstrap.WithProviderTeamPermissions(mapTeamSlice(giteaArgs.teams, gtDefaultPermission)),
+		bootstrap.WithReadWriteKeyPermissions(giteaArgs.readWriteKey),
+		bootstrap.WithKubeconfig(kubeconfigArgs, kubeclientOptions),
+		bootstrap.WithLogger(logger),
+		bootstrap.WithGitCommitSigning(entityList, bootstrapArgs.gpgPassphrase, bootstrapArgs.gpgKeyID),
+	}
+	if bootstrapArgs.sshHostname != "" {
+		bootstrapOpts = append(bootstrapOpts, bootstrap.WithSSHHostname(bootstrapArgs.sshHostname))
+	}
+	if bootstrapArgs.tokenAuth {
+		bootstrapOpts = append(bootstrapOpts, bootstrap.WithSyncTransportType("https"))
+	}
+	if !giteaArgs.private {
+		bootstrapOpts = append(bootstrapOpts, bootstrap.WithProviderRepositoryConfig("", "", "public"))
+	}
+	if giteaArgs.reconcile {
+		bootstrapOpts = append(bootstrapOpts, bootstrap.WithReconcile())
+	}
+
+	// Setup bootstrapper with constructed configs
+	b, err := bootstrap.NewGitProviderBootstrapper(gitClient, providerClient, kubeClient, bootstrapOpts...)
+	if err != nil {
+		return err
+	}
+
+	// Run
+	return bootstrap.Run(ctx, b, manifestsBase, installOptions, secretOpts, syncOpts, rootArgs.pollInterval, rootArgs.timeout)
+}

pkg/bootstrap/provider/factory.go

@@ -19,6 +19,7 @@ package provider
 import (
 	"fmt"
 
+	"github.com/fluxcd/go-git-providers/gitea"
 	"github.com/fluxcd/go-git-providers/github"
 	"github.com/fluxcd/go-git-providers/gitlab"
 	"github.com/fluxcd/go-git-providers/gitprovider"
@@ -45,6 +46,19 @@ func BuildGitProvider(config Config) (gitprovider.Client, error) {
 		if client, err = github.NewClient(opts...); err != nil {
 			return nil, err
 		}
+	case GitProviderGitea:
+		opts := []gitprovider.ClientOption{
+			gitprovider.WithDomain(config.Hostname),
+		}
+		if config.Hostname != "" {
+			opts = append(opts, gitprovider.WithDomain(config.Hostname))
+		}
+		if config.CaBundle != nil {
+			opts = append(opts, gitprovider.WithCustomCAPostChainTransportHook(config.CaBundle))
+		}
+		if client, err = gitea.NewClient(config.Token); err != nil {
+			return nil, err
+		}
 	case GitProviderGitLab:
 		opts := []gitprovider.ClientOption{
 			gitprovider.WithConditionalRequests(true),

pkg/bootstrap/provider/provider.go

@@ -21,6 +21,7 @@ type GitProvider string
 
 const (
 	GitProviderGitHub GitProvider = "github"
+	GitProviderGitea  GitProvider = "gitea"
 	GitProviderGitLab GitProvider = "gitlab"
 	GitProviderStash  GitProvider = "stash"
 )