Update default branch on empty repo for first commit (#1122)

app/api/controller/githook/client.go

@@ -19,7 +19,7 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/harness/gitness/app/api/controller/githook"
+	"github.com/harness/gitness/app/githook"
 	"github.com/harness/gitness/git"
 	"github.com/harness/gitness/git/hook"
 	"github.com/harness/gitness/store"
@@ -33,12 +33,12 @@ var _ hook.Client = (*ControllerClient)(nil)
 
 // ControllerClientFactory creates clients that directly call the controller to execute githooks.
 type ControllerClientFactory struct {
-	githookCtrl *githook.Controller
+	githookCtrl *Controller
 	git         git.Interface
 }
 
 func (f *ControllerClientFactory) NewClient(_ context.Context, envVars map[string]string) (hook.Client, error) {
-	payload, err := hook.LoadPayloadFromMap[Payload](envVars)
+	payload, err := hook.LoadPayloadFromMap[githook.Payload](envVars)
 	if err != nil {
 		return nil, fmt.Errorf("failed to load payload from provided map of environment variables: %w", err)
 	}
@@ -53,7 +53,7 @@ func (f *ControllerClientFactory) NewClient(_ context.Context, envVars map[strin
 	}
 
 	return &ControllerClient{
-		baseInput:   GetInputBaseFromPayload(payload),
+		baseInput:   githook.GetInputBaseFromPayload(payload),
 		githookCtrl: f.githookCtrl,
 		git:         f.git,
 	}, nil
@@ -62,8 +62,8 @@ func (f *ControllerClientFactory) NewClient(_ context.Context, envVars map[strin
 // ControllerClient directly calls the controller to execute githooks.
 type ControllerClient struct {
 	baseInput   types.GithookInputBase
-	githookCtrl *githook.Controller
+	githookCtrl *Controller
-	git         githook.RestrictedGIT
+	git         RestrictedGIT
 }
 
 func (c *ControllerClient) PreReceive(

app/api/controller/githook/controller.go

@@ -23,6 +23,7 @@ import (
 	"github.com/harness/gitness/app/auth"
 	"github.com/harness/gitness/app/auth/authz"
 	eventsgit "github.com/harness/gitness/app/events/git"
+	eventsrepo "github.com/harness/gitness/app/events/repo"
 	"github.com/harness/gitness/app/services/protection"
 	"github.com/harness/gitness/app/services/settings"
 	"github.com/harness/gitness/app/store"
@@ -41,6 +42,8 @@ type Controller struct {
 	principalStore      store.PrincipalStore
 	repoStore           store.RepoStore
 	gitReporter         *eventsgit.Reporter
+	repoReporter        *eventsrepo.Reporter
+	git                 git.Interface
 	pullreqStore        store.PullReqStore
 	urlProvider         url.Provider
 	protectionManager   *protection.Manager
@@ -56,6 +59,8 @@ func NewController(
 	principalStore store.PrincipalStore,
 	repoStore store.RepoStore,
 	gitReporter *eventsgit.Reporter,
+	repoReporter *eventsrepo.Reporter,
+	git git.Interface,
 	pullreqStore store.PullReqStore,
 	urlProvider url.Provider,
 	protectionManager *protection.Manager,
@@ -64,13 +69,14 @@ func NewController(
 	preReceiveExtender PreReceiveExtender,
 	updateExtender UpdateExtender,
 	postReceiveExtender PostReceiveExtender,
-
 ) *Controller {
 	return &Controller{
 		authorizer:          authorizer,
 		principalStore:      principalStore,
 		repoStore:           repoStore,
 		gitReporter:         gitReporter,
+		repoReporter:        repoReporter,
+		git:                 git,
 		pullreqStore:        pullreqStore,
 		urlProvider:         urlProvider,
 		protectionManager:   protectionManager,

app/api/controller/githook/post_receive.go

@@ -19,13 +19,17 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/harness/gitness/app/api/usererror"
 	"github.com/harness/gitness/app/auth"
+	"github.com/harness/gitness/app/bootstrap"
 	events "github.com/harness/gitness/app/events/git"
+	repoevents "github.com/harness/gitness/app/events/repo"
 	"github.com/harness/gitness/git"
 	"github.com/harness/gitness/git/hook"
 	"github.com/harness/gitness/types"
 	"github.com/harness/gitness/types/enum"
 
+	"github.com/gotidy/ptr"
 	"github.com/rs/zerolog/log"
 )
 
@@ -51,13 +55,16 @@ func (c *Controller) PostReceive(
 	if err != nil {
 		return hook.Output{}, err
 	}
+	// create output object and have following messages fill its messages
+	out := hook.Output{}
+
+	// update default branch based on ref update info on empty repos.
+	// as the branch could be different than the configured default value.
+	c.handleEmptyRepoPush(ctx, repo, in.PostReceiveInput, &out)
 
 	// report ref events (best effort)
 	c.reportReferenceEvents(ctx, rgit, repo, in.PrincipalID, in.PostReceiveInput)
 
-	// create output object and have following messages fill its messages
-	out := hook.Output{}
-
 	// handle branch updates related to PRs - best effort
 	c.handlePRMessaging(ctx, repo, in.PostReceiveInput, &out)
 
@@ -250,3 +257,50 @@ func (c *Controller) suggestPullRequest(
 		"  "+c.urlProvider.GenerateUICompareURL(repo.Path, repo.DefaultBranch, branchName),
 	)
 }
+
+// handleEmptyRepoPush updates repo default branch on empty repos if push contains branches.
+func (c *Controller) handleEmptyRepoPush(
+	ctx context.Context,
+	repo *types.Repository,
+	in hook.PostReceiveInput,
+	out *hook.Output,
+) {
+	if !repo.IsEmpty {
+		return
+	}
+
+	var branchName string
+	// we only care about one active branch that was pushed.
+	for _, refUpdate := range in.RefUpdates {
+		if strings.HasPrefix(refUpdate.Ref, gitReferenceNamePrefixBranch) &&
+			refUpdate.New.String() != types.NilSHA {
+			branchName = refUpdate.Ref[len(gitReferenceNamePrefixBranch):]
+			break
+		}
+	}
+	if branchName == "" {
+		out.Error = ptr.String(usererror.ErrEmptyRepoNeedsBranch.Error())
+		return
+	}
+
+	oldName := repo.DefaultBranch
+	var err error
+	repo, err = c.repoStore.UpdateOptLock(ctx, repo, func(r *types.Repository) error {
+		r.IsEmpty = false
+		r.DefaultBranch = branchName
+		return nil
+	})
+	if err != nil {
+		log.Ctx(ctx).Warn().Err(err).Msgf("failed to update the repo default branch to %s and is_empty to false", branchName)
+		return
+	}
+
+	if repo.DefaultBranch != oldName {
+		c.repoReporter.DefaultBranchUpdated(ctx, &repoevents.DefaultBranchUpdatedPayload{
+			RepoID:      repo.ID,
+			PrincipalID: bootstrap.NewSystemServiceSession().Principal.ID,
+			OldName:     oldName,
+			NewName:     repo.DefaultBranch,
+		})
+	}
+}

app/api/controller/githook/wire.go

@@ -14,11 +14,76 @@
 
 package githook
 
-import "github.com/google/wire"
+import (
+	"github.com/harness/gitness/app/api/controller/limiter"
+	"github.com/harness/gitness/app/auth/authz"
+	eventsgit "github.com/harness/gitness/app/events/git"
+	eventsrepo "github.com/harness/gitness/app/events/repo"
+	"github.com/harness/gitness/app/services/protection"
+	"github.com/harness/gitness/app/services/settings"
+	"github.com/harness/gitness/app/store"
+	"github.com/harness/gitness/app/url"
+	"github.com/harness/gitness/git"
+	"github.com/harness/gitness/git/hook"
 
-// Due to cyclic injection dependencies, wiring can be found at app/githook/wire.go
+	"github.com/google/wire"
+)
 
 var WireSet = wire.NewSet(
+	ProvideController,
+	ProvideFactory,
+)
+
+func ProvideFactory() hook.ClientFactory {
+	return &ControllerClientFactory{
+		githookCtrl: nil,
+	}
+}
+
+func ProvideController(
+	authorizer authz.Authorizer,
+	principalStore store.PrincipalStore,
+	repoStore store.RepoStore,
+	gitReporter *eventsgit.Reporter,
+	repoReporter *eventsrepo.Reporter,
+	git git.Interface,
+	pullreqStore store.PullReqStore,
+	urlProvider url.Provider,
+	protectionManager *protection.Manager,
+	githookFactory hook.ClientFactory,
+	limiter limiter.ResourceLimiter,
+	settings *settings.Service,
+	preReceiveExtender PreReceiveExtender,
+	updateExtender UpdateExtender,
+	postReceiveExtender PostReceiveExtender,
+) *Controller {
+	ctrl := NewController(
+		authorizer,
+		principalStore,
+		repoStore,
+		gitReporter,
+		repoReporter,
+		git,
+		pullreqStore,
+		urlProvider,
+		protectionManager,
+		limiter,
+		settings,
+		preReceiveExtender,
+		updateExtender,
+		postReceiveExtender,
+	)
+
+	// TODO: improve wiring if possible
+	if fct, ok := githookFactory.(*ControllerClientFactory); ok {
+		fct.githookCtrl = ctrl
+		fct.git = git
+	}
+
+	return ctrl
+}
+
+var ExtenderWireSet = wire.NewSet(
 	ProvidePreReceiveExtender,
 	ProvideUpdateExtender,
 	ProvidePostReceiveExtender,

app/api/controller/pullreq/controller.go

@@ -25,6 +25,7 @@ import (
 	pullreqevents "github.com/harness/gitness/app/events/pullreq"
 	"github.com/harness/gitness/app/services/codecomments"
 	"github.com/harness/gitness/app/services/codeowners"
+	locker "github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/services/protection"
 	"github.com/harness/gitness/app/services/pullreq"
 	"github.com/harness/gitness/app/sse"
@@ -33,7 +34,6 @@ import (
 	"github.com/harness/gitness/errors"
 	"github.com/harness/gitness/git"
 	gitenum "github.com/harness/gitness/git/enum"
-	"github.com/harness/gitness/lock"
 	"github.com/harness/gitness/store/database/dbtx"
 	"github.com/harness/gitness/types"
 	"github.com/harness/gitness/types/enum"
@@ -55,12 +55,12 @@ type Controller struct {
 	checkStore          store.CheckStore
 	git                 git.Interface
 	eventReporter       *pullreqevents.Reporter
-	mtxManager          lock.MutexManager
 	codeCommentMigrator *codecomments.Migrator
 	pullreqService      *pullreq.Service
 	protectionManager   *protection.Manager
 	sseStreamer         sse.Streamer
 	codeOwners          *codeowners.Service
+	locker              *locker.Locker
 }
 
 func NewController(
@@ -79,12 +79,12 @@ func NewController(
 	checkStore store.CheckStore,
 	git git.Interface,
 	eventReporter *pullreqevents.Reporter,
-	mtxManager lock.MutexManager,
 	codeCommentMigrator *codecomments.Migrator,
 	pullreqService *pullreq.Service,
 	protectionManager *protection.Manager,
 	sseStreamer sse.Streamer,
 	codeowners *codeowners.Service,
+	locker *locker.Locker,
 ) *Controller {
 	return &Controller{
 		tx:                  tx,
@@ -103,11 +103,11 @@ func NewController(
 		git:                 git,
 		codeCommentMigrator: codeCommentMigrator,
 		eventReporter:       eventReporter,
-		mtxManager:          mtxManager,
 		pullreqService:      pullreqService,
 		protectionManager:   protectionManager,
 		sseStreamer:         sseStreamer,
 		codeOwners:          codeowners,
+		locker:              locker,
 	}
 }
 

app/api/controller/pullreq/locks.go

@@ -1,83 +0,0 @@
-// Copyright 2023 Harness, Inc.
-//
-// 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 pullreq
-
-import (
-	"context"
-	"fmt"
-	"strconv"
-	"time"
-
-	"github.com/harness/gitness/contextutil"
-	"github.com/harness/gitness/lock"
-	"github.com/harness/gitness/logging"
-
-	"github.com/rs/zerolog"
-	"github.com/rs/zerolog/log"
-)
-
-func (c *Controller) lockPR(
-	ctx context.Context,
-	repoID int64,
-	prNum int64,
-	expiry time.Duration,
-) (func(), error) {
-	key := fmt.Sprintf("%d/pulls", repoID)
-	if prNum != 0 {
-		key += "/" + strconv.FormatInt(prNum, 10)
-	}
-
-	// annotate logs for easier debugging of lock related merge issues
-	// TODO: refactor once common logging annotations are added
-	ctx = logging.NewContext(ctx, func(c zerolog.Context) zerolog.Context {
-		return c.
-			Str("pullreq_lock", key).
-			Int64("repo_id", repoID)
-	})
-
-	mutex, err := c.mtxManager.NewMutex(
-		key,
-		lock.WithNamespace("repo"),
-		lock.WithExpiry(expiry),
-		lock.WithTimeoutFactor(4/expiry.Seconds()), // 4s
-	)
-	if err != nil {
-		return nil, fmt.Errorf("failed to create new mutex for pr %d in repo %d: %w", prNum, repoID, err)
-	}
-	err = mutex.Lock(ctx)
-	if err != nil {
-		return nil, fmt.Errorf("failed to lock mutex for pr %d in repo %d: %w", prNum, repoID, err)
-	}
-
-	log.Ctx(ctx).Debug().Msgf("successfully locked PR (expiry: %s)", expiry)
-
-	unlockFn := func() {
-		// always unlock independent of whether source context got canceled or not
-		ctx, cancel := context.WithTimeout(
-			contextutil.WithNewValues(context.Background(), ctx),
-			30*time.Second,
-		)
-		defer cancel()
-
-		err := mutex.Unlock(ctx)
-		if err != nil {
-			log.Ctx(ctx).Warn().Err(err).Msg("failed to unlock PR")
-		} else {
-			log.Ctx(ctx).Debug().Msg("successfully unlocked PR")
-		}
-	}
-
-	return unlockFn, nil
-}

app/api/controller/pullreq/merge.go

@@ -117,7 +117,7 @@ func (c *Controller) Merge(
 	// first one and second one will wait, when first one is done then second one
 	// continue with latest data from db with state merged and return error that
 	// pr is already merged.
-	unlock, err := c.lockPR(
+	unlock, err := c.locker.LockPR(
 		ctx,
 		targetRepo.ID,
 		0,                      // 0 means locks all PRs for this repo

app/api/controller/pullreq/wire.go

@@ -19,13 +19,13 @@ import (
 	pullreqevents "github.com/harness/gitness/app/events/pullreq"
 	"github.com/harness/gitness/app/services/codecomments"
 	"github.com/harness/gitness/app/services/codeowners"
+	"github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/services/protection"
 	"github.com/harness/gitness/app/services/pullreq"
 	"github.com/harness/gitness/app/sse"
 	"github.com/harness/gitness/app/store"
 	"github.com/harness/gitness/app/url"
 	"github.com/harness/gitness/git"
-	"github.com/harness/gitness/lock"
 	"github.com/harness/gitness/store/database/dbtx"
 
 	"github.com/google/wire"
@@ -43,10 +43,9 @@ func ProvideController(tx dbtx.Transactor, urlProvider url.Provider, authorizer
 	repoStore store.RepoStore, principalStore store.PrincipalStore,
 	fileViewStore store.PullReqFileViewStore, membershipStore store.MembershipStore,
 	checkStore store.CheckStore,
-	rpcClient git.Interface, eventReporter *pullreqevents.Reporter,
+	rpcClient git.Interface, eventReporter *pullreqevents.Reporter, codeCommentMigrator *codecomments.Migrator,
-	mtxManager lock.MutexManager, codeCommentMigrator *codecomments.Migrator,
 	pullreqService *pullreq.Service, ruleManager *protection.Manager, sseStreamer sse.Streamer,
-	codeOwners *codeowners.Service,
+	codeOwners *codeowners.Service, locker *locker.Locker,
 ) *Controller {
 	return NewController(tx, urlProvider, authorizer,
 		pullReqStore, pullReqActivityStore,
@@ -56,6 +55,6 @@ func ProvideController(tx dbtx.Transactor, urlProvider url.Provider, authorizer
 		fileViewStore, membershipStore,
 		checkStore,
 		rpcClient, eventReporter,
-		mtxManager, codeCommentMigrator,
+		codeCommentMigrator,
-		pullreqService, ruleManager, sseStreamer, codeOwners)
+		pullreqService, ruleManager, sseStreamer, codeOwners, locker)
 }

app/api/controller/repo/controller.go

@@ -29,6 +29,7 @@ import (
 	"github.com/harness/gitness/app/services/codeowners"
 	"github.com/harness/gitness/app/services/importer"
 	"github.com/harness/gitness/app/services/keywordsearch"
+	"github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/services/protection"
 	"github.com/harness/gitness/app/services/settings"
 	"github.com/harness/gitness/app/store"
@@ -66,6 +67,7 @@ type Controller struct {
 	eventReporter      *repoevents.Reporter
 	indexer            keywordsearch.Indexer
 	resourceLimiter    limiter.ResourceLimiter
+	locker             *locker.Locker
 	mtxManager         lock.MutexManager
 	identifierCheck    check.RepoIdentifier
 	repoCheck          Check
@@ -90,6 +92,7 @@ func NewController(
 	eventReporter *repoevents.Reporter,
 	indexer keywordsearch.Indexer,
 	limiter limiter.ResourceLimiter,
+	locker *locker.Locker,
 	mtxManager lock.MutexManager,
 	identifierCheck check.RepoIdentifier,
 	repoCheck Check,
@@ -114,6 +117,7 @@ func NewController(
 		eventReporter:                 eventReporter,
 		indexer:                       indexer,
 		resourceLimiter:               limiter,
+		locker:                        locker,
 		mtxManager:                    mtxManager,
 		identifierCheck:               identifierCheck,
 		repoCheck:                     repoCheck,

app/api/controller/repo/create.go

@@ -81,7 +81,7 @@ func (c *Controller) Create(ctx context.Context, session *auth.Session, in *Crea
 			return fmt.Errorf("resource limit exceeded: %w", limiter.ErrMaxNumReposReached)
 		}
 
-		gitResp, err := c.createGitRepository(ctx, session, in)
+		gitResp, isEmpty, err := c.createGitRepository(ctx, session, in)
 		if err != nil {
 			return fmt.Errorf("error creating repository on git: %w", err)
 		}
@@ -99,6 +99,7 @@ func (c *Controller) Create(ctx context.Context, session *auth.Session, in *Crea
 			Updated:       now,
 			ForkID:        in.ForkID,
 			DefaultBranch: in.DefaultBranch,
+			IsEmpty:       isEmpty,
 		}
 		err = c.repoStore.Create(ctx, repo)
 		if err != nil {
@@ -118,7 +119,7 @@ func (c *Controller) Create(ctx context.Context, session *auth.Session, in *Crea
 	repo.GitURL = c.urlProvider.GenerateGITCloneURL(repo.Path)
 
 	// index repository if files are created
-	if in.Readme || in.GitIgnore != "" || (in.License != "" && in.License != "none") {
+	if !repo.IsEmpty {
 		err = c.indexer.Index(ctx, repo)
 		if err != nil {
 			log.Ctx(ctx).Warn().Err(err).Int64("repo_id", repo.ID).Msg("failed to index repo")
@@ -186,7 +187,7 @@ func (c *Controller) sanitizeCreateInput(in *CreateInput) error {
 }
 
 func (c *Controller) createGitRepository(ctx context.Context, session *auth.Session,
-	in *CreateInput) (*git.CreateRepositoryOutput, error) {
+	in *CreateInput) (*git.CreateRepositoryOutput, bool, error) {
 	var (
 		err     error
 		content []byte
@@ -202,7 +203,7 @@ func (c *Controller) createGitRepository(ctx context.Context, session *auth.Sess
 	if in.License != "" && in.License != "none" {
 		content, err = resources.ReadLicense(in.License)
 		if err != nil {
-			return nil, fmt.Errorf("failed to read license '%s': %w", in.License, err)
+			return nil, false, fmt.Errorf("failed to read license '%s': %w", in.License, err)
 		}
 		files = append(files, git.File{
 			Path:    "LICENSE",
@@ -212,7 +213,7 @@ func (c *Controller) createGitRepository(ctx context.Context, session *auth.Sess
 	if in.GitIgnore != "" {
 		content, err = resources.ReadGitIgnore(in.GitIgnore)
 		if err != nil {
-			return nil, fmt.Errorf("failed to read git ignore '%s': %w", in.GitIgnore, err)
+			return nil, false, fmt.Errorf("failed to read git ignore '%s': %w", in.GitIgnore, err)
 		}
 		files = append(files, git.File{
 			Path:    ".gitignore",
@@ -230,7 +231,7 @@ func (c *Controller) createGitRepository(ctx context.Context, session *auth.Sess
 		true,
 	)
 	if err != nil {
-		return nil, fmt.Errorf("failed to generate git hook environment variables: %w", err)
+		return nil, false, fmt.Errorf("failed to generate git hook environment variables: %w", err)
 	}
 
 	actor := identityFromPrincipal(session.Principal)
@@ -247,10 +248,10 @@ func (c *Controller) createGitRepository(ctx context.Context, session *auth.Sess
 		CommitterDate: &now,
 	})
 	if err != nil {
-		return nil, fmt.Errorf("failed to create repo on: %w", err)
+		return nil, false, fmt.Errorf("failed to create repo on: %w", err)
 	}
 
-	return resp, nil
+	return resp, len(files) == 0, nil
 }
 
 func createReadme(name, description string) []byte {

app/api/controller/repo/default_branch.go

@@ -21,12 +21,12 @@ import (
 
 	"github.com/harness/gitness/app/api/controller"
 	"github.com/harness/gitness/app/auth"
+	"github.com/harness/gitness/app/bootstrap"
+	repoevents "github.com/harness/gitness/app/events/repo"
 	"github.com/harness/gitness/contextutil"
 	"github.com/harness/gitness/git"
 	"github.com/harness/gitness/types"
 	"github.com/harness/gitness/types/enum"
-
-	"github.com/rs/zerolog/log"
 )
 
 type UpdateDefaultBranchInput struct {
@@ -50,11 +50,11 @@ func (c *Controller) UpdateDefaultBranch(
 
 	// lock concurrent requests for updating the default branch of a repo
 	// requests will wait for previous ones to compelete before proceed
-	unlock, err := c.lockDefaultBranch(
+	unlock, err := c.locker.LockDefaultBranch(
 		ctx,
-		repo.GitUID,
+		repo.ID,
 		in.Name,                // branch name only used for logging (lock is on repo)
-		timeout+30*time.Second,
+		timeout+30*time.Second, // add 30s to the lock to give enough time for updating default branch
 	)
 	if err != nil {
 		return nil, err
@@ -82,6 +82,7 @@ func (c *Controller) UpdateDefaultBranch(
 		return nil, fmt.Errorf("failed to update the repo default branch: %w", err)
 	}
 
+	oldName := repo.DefaultBranch
 	repo, err = c.repoStore.UpdateOptLock(ctx, repo, func(r *types.Repository) error {
 		r.DefaultBranch = in.Name
 		return nil
@@ -90,11 +91,12 @@ func (c *Controller) UpdateDefaultBranch(
 		return nil, fmt.Errorf("failed to update the repo default branch on db:%w", err)
 	}
 
-	err = c.indexer.Index(ctx, repo)
+	c.eventReporter.DefaultBranchUpdated(ctx, &repoevents.DefaultBranchUpdatedPayload{
-	if err != nil {
+		RepoID:      repo.ID,
-		log.Ctx(ctx).Warn().Err(err).Int64("repo_id", repo.ID).
+		PrincipalID: bootstrap.NewSystemServiceSession().Principal.ID,
-			Msgf("failed to index repo with the updated default branch %s", in.Name)
+		OldName:     oldName,
-	}
+		NewName:     repo.DefaultBranch,
+	})
 
 	return repo, nil
 }

app/api/controller/repo/wire.go

@@ -21,6 +21,7 @@ import (
 	"github.com/harness/gitness/app/services/codeowners"
 	"github.com/harness/gitness/app/services/importer"
 	"github.com/harness/gitness/app/services/keywordsearch"
+	"github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/services/protection"
 	"github.com/harness/gitness/app/services/settings"
 	"github.com/harness/gitness/app/store"
@@ -58,6 +59,7 @@ func ProvideController(
 	reporeporter *repoevents.Reporter,
 	indexer keywordsearch.Indexer,
 	limiter limiter.ResourceLimiter,
+	locker *locker.Locker,
 	mtxManager lock.MutexManager,
 	identifierCheck check.RepoIdentifier,
 	repoChecks Check,
@@ -65,8 +67,8 @@ func ProvideController(
 	return NewController(config, tx, urlProvider,
 		authorizer, repoStore,
 		spaceStore, pipelineStore,
-		principalStore, ruleStore, settings, principalInfoCache, protectionManager,
+		principalStore, ruleStore, settings, principalInfoCache, protectionManager, rpcClient, importer,
-		rpcClient, importer, codeOwners, reporeporter, indexer, limiter, mtxManager, identifierCheck, repoChecks)
+		codeOwners, reporeporter, indexer, limiter, locker, mtxManager, identifierCheck, repoChecks)
 }
 
 func ProvideRepoCheck() Check {

app/api/usererror/usererror.go

@@ -88,6 +88,10 @@ var (
 		http.StatusLocked,
 		"The requested resource is temporarily locked, please retry the operation.",
 	)
+
+	// ErrEmptyRepoNeedsBranch is returned if no branch found on the githook post receieve for empty repositories.
+	ErrEmptyRepoNeedsBranch = New(http.StatusBadRequest,
+		"Pushing to an empty repository requires at least one branch with commits.")
 )
 
 // Error represents a json-encoded API error.

app/events/repo/events_repo.go

@@ -45,3 +45,27 @@ func (r *Reader) RegisterRepoDeleted(fn events.HandlerFunc[*DeletedPayload],
 	opts ...events.HandlerOption) error {
 	return events.ReaderRegisterEvent(r.innerReader, DeletedEvent, fn, opts...)
 }
+
+const DefaultBranchUpdatedEvent events.EventType = "default-branch-updated"
+
+type DefaultBranchUpdatedPayload struct {
+	RepoID      int64  `json:"repo_id"`
+	PrincipalID int64  `json:"principal_id"`
+	OldName     string `json:"old_name"`
+	NewName     string `json:"new_name"`
+}
+
+func (r *Reporter) DefaultBranchUpdated(ctx context.Context, payload *DefaultBranchUpdatedPayload) {
+	eventID, err := events.ReporterSendEvent(r.innerReporter, ctx, DefaultBranchUpdatedEvent, payload)
+	if err != nil {
+		log.Ctx(ctx).Err(err).Msgf("failed to send default branch updated event")
+		return
+	}
+
+	log.Ctx(ctx).Debug().Msgf("reported default branch updated event with id '%s'", eventID)
+}
+
+func (r *Reader) RegisterDefaultBranchUpdated(fn events.HandlerFunc[*DefaultBranchUpdatedPayload],
+	opts ...events.HandlerOption) error {
+	return events.ReaderRegisterEvent(r.innerReader, DefaultBranchUpdatedEvent, fn, opts...)
+}

app/githook/wire.go

@@ -1,83 +0,0 @@
-// Copyright 2023 Harness, Inc.
-//
-// 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 githook
-
-import (
-	"github.com/harness/gitness/app/api/controller/githook"
-	"github.com/harness/gitness/app/api/controller/limiter"
-	"github.com/harness/gitness/app/auth/authz"
-	eventsgit "github.com/harness/gitness/app/events/git"
-	"github.com/harness/gitness/app/services/protection"
-	"github.com/harness/gitness/app/services/settings"
-	"github.com/harness/gitness/app/store"
-	"github.com/harness/gitness/app/url"
-	"github.com/harness/gitness/git"
-	"github.com/harness/gitness/git/hook"
-
-	"github.com/google/wire"
-)
-
-// WireSet provides a wire set for this package.
-var WireSet = wire.NewSet(
-	ProvideController,
-	ProvideFactory,
-)
-
-func ProvideFactory() hook.ClientFactory {
-	return &ControllerClientFactory{
-		// will be set in ProvideController (to break cyclic dependency during wiring)
-		githookCtrl: nil,
-	}
-}
-
-func ProvideController(
-	authorizer authz.Authorizer,
-	principalStore store.PrincipalStore,
-	repoStore store.RepoStore,
-	gitReporter *eventsgit.Reporter,
-	git git.Interface,
-	pullreqStore store.PullReqStore,
-	urlProvider url.Provider,
-	protectionManager *protection.Manager,
-	githookFactory hook.ClientFactory,
-	limiter limiter.ResourceLimiter,
-	settings *settings.Service,
-	preReceiveExtender githook.PreReceiveExtender,
-	updateExtender githook.UpdateExtender,
-	postReceiveExtender githook.PostReceiveExtender,
-) *githook.Controller {
-	ctrl := githook.NewController(
-		authorizer,
-		principalStore,
-		repoStore,
-		gitReporter,
-		pullreqStore,
-		urlProvider,
-		protectionManager,
-		limiter,
-		settings,
-		preReceiveExtender,
-		updateExtender,
-		postReceiveExtender,
-	)
-
-	// TODO: improve wiring if possible
-	if fct, ok := githookFactory.(*ControllerClientFactory); ok {
-		fct.githookCtrl = ctrl
-		fct.git = git
-	}
-
-	return ctrl
-}

app/services/keywordsearch/handler_branch.go

@@ -20,6 +20,7 @@ import (
 	"strings"
 
 	gitevents "github.com/harness/gitness/app/events/git"
+	repoevents "github.com/harness/gitness/app/events/repo"
 	"github.com/harness/gitness/events"
 )
 
@@ -33,6 +34,21 @@ func (s *Service) handleEventBranchUpdated(ctx context.Context,
 	return s.indexRepo(ctx, event.Payload.RepoID, event.Payload.Ref)
 }
 
+func (s *Service) handleUpdateDefaultBranch(ctx context.Context,
+	event *events.Event[*repoevents.DefaultBranchUpdatedPayload]) error {
+	repo, err := s.repoStore.Find(ctx, event.Payload.RepoID)
+	if err != nil {
+		return fmt.Errorf("failed to find repository in db: %w", err)
+	}
+
+	err = s.indexer.Index(ctx, repo)
+	if err != nil {
+		return fmt.Errorf("index update failed for repo %d: %w", repo.ID, err)
+	}
+
+	return nil
+}
+
 func (s *Service) indexRepo(
 	ctx context.Context,
 	repoID int64,
@@ -64,6 +80,7 @@ func (s *Service) indexRepo(
 
 func getBranchFromRef(ref string) (string, error) {
 	const refPrefix = "refs/heads/"
+
 	if !strings.HasPrefix(ref, refPrefix) {
 		return "", fmt.Errorf("failed to get branch name from branch ref %s", ref)
 	}

app/services/keywordsearch/service.go

@@ -21,14 +21,13 @@ import (
 	"time"
 
 	gitevents "github.com/harness/gitness/app/events/git"
+	repoevents "github.com/harness/gitness/app/events/repo"
 	"github.com/harness/gitness/app/store"
 	"github.com/harness/gitness/events"
 	"github.com/harness/gitness/stream"
 )
 
-const (
+const groupGitEvents = "gitness:keywordsearch"
-	eventsReaderGroupName = "gitness:keywordsearch"
-)
 
 type Config struct {
 	EventReaderName string
@@ -63,6 +62,7 @@ func NewService(
 	ctx context.Context,
 	config Config,
 	gitReaderFactory *events.ReaderFactory[*gitevents.Reader],
+	repoReaderFactory *events.ReaderFactory[*repoevents.Reader],
 	repoStore store.RepoStore,
 	indexer Indexer,
 ) (*Service, error) {
@@ -75,7 +75,7 @@ func NewService(
 		indexer:   indexer,
 	}
 
-	_, err := gitReaderFactory.Launch(ctx, eventsReaderGroupName, config.EventReaderName,
+	_, err := gitReaderFactory.Launch(ctx, groupGitEvents, config.EventReaderName,
 		func(r *gitevents.Reader) error {
 			const idleTimeout = 1 * time.Minute
 			r.Configure(
@@ -95,5 +95,22 @@ func NewService(
 		return nil, fmt.Errorf("failed to launch git event reader for webhooks: %w", err)
 	}
 
+	_, err = repoReaderFactory.Launch(ctx, groupGitEvents, config.EventReaderName,
+		func(r *repoevents.Reader) error {
+			const idleTimeout = 1 * time.Minute
+			r.Configure(
+				stream.WithConcurrency(config.Concurrency),
+				stream.WithHandlerOptions(
+					stream.WithIdleTimeout(idleTimeout),
+					stream.WithMaxRetries(config.MaxRetries),
+				))
+
+			_ = r.RegisterDefaultBranchUpdated((service.handleUpdateDefaultBranch))
+			return nil
+		})
+	if err != nil {
+		return nil, fmt.Errorf("failed to launch reader factory for repo git group: %w", err)
+	}
+
 	return service, nil
 }

app/services/keywordsearch/wire.go

@@ -18,6 +18,7 @@ import (
 	"context"
 
 	gitevents "github.com/harness/gitness/app/events/git"
+	repoevents "github.com/harness/gitness/app/events/repo"
 	"github.com/harness/gitness/app/store"
 	"github.com/harness/gitness/events"
 
@@ -35,12 +36,14 @@ var WireSet = wire.NewSet(
 func ProvideService(ctx context.Context,
 	config Config,
 	gitReaderFactory *events.ReaderFactory[*gitevents.Reader],
+	repoReaderFactory *events.ReaderFactory[*repoevents.Reader],
 	repoStore store.RepoStore,
 	indexer Indexer,
 ) (*Service, error) {
 	return NewService(ctx,
 		config,
 		gitReaderFactory,
+		repoReaderFactory,
 		repoStore,
 		indexer)
 }

app/services/locker/locker.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package repo
+package locker
 
 import (
 	"context"
@@ -27,38 +27,50 @@ import (
 	"github.com/rs/zerolog/log"
 )
 
-func (c *Controller) lockDefaultBranch(
+const namespaceRepo = "repo"
+
+type Locker struct {
+	mtxManager lock.MutexManager
+}
+
+func NewLocker(mtxManager lock.MutexManager) *Locker {
+	return &Locker{
+		mtxManager: mtxManager,
+	}
+}
+
+func (l Locker) lock(
 	ctx context.Context,
-	repoUID string,
+	namespace string,
-	branchName string,
+	key string,
 	expiry time.Duration,
 ) (func(), error) {
-	key := repoUID + "/defaultBranch"
-
 	// annotate logs for easier debugging of lock related issues
-	// TODO: refactor once common logging annotations are added
 	ctx = logging.NewContext(ctx, func(zc zerolog.Context) zerolog.Context {
 		return zc.
-			Str("default_branch_lock", key).
+			Str("key", key).
-			Str("repo_uid", repoUID)
+			Str("namespace", namespaceRepo).
+			Str("expiry", expiry.String())
 	})
 
-	mutext, err := c.mtxManager.NewMutex(
+	mutext, err := l.mtxManager.NewMutex(
 		key,
-		lock.WithNamespace("repo"),
+		lock.WithNamespace(namespace),
 		lock.WithExpiry(expiry),
 		lock.WithTimeoutFactor(4/expiry.Seconds()), // 4s
 	)
 	if err != nil {
-		return nil, fmt.Errorf("failed to create new mutex for repo %q with default branch %s: %w", repoUID, branchName, err)
+		return nil, fmt.Errorf("failed to create new mutex: %w", err)
 	}
 
+	log.Ctx(ctx).Debug().Msg("attempting to acquire lock")
+
 	err = mutext.Lock(ctx)
 	if err != nil {
-		return nil, fmt.Errorf("failed to lock the mutex for repo %q with default branch %s: %w", repoUID, branchName, err)
+		return nil, fmt.Errorf("failed to lock the mutex: %w", err)
 	}
 
-	log.Ctx(ctx).Info().Msgf("successfully locked the repo default branch (expiry: %s)", expiry)
+	log.Ctx(ctx).Debug().Msgf("successfully locked (expiry: %s)", expiry)
 
 	unlockFn := func() {
 		// always unlock independent of whether source context got canceled or not
@@ -70,10 +82,11 @@ func (c *Controller) lockDefaultBranch(
 
 		err := mutext.Unlock(ctx)
 		if err != nil {
-			log.Ctx(ctx).Warn().Err(err).Msg("failed to unlock repo default branch")
+			log.Ctx(ctx).Warn().Err(err).Msg("failed to unlock")
 		} else {
-			log.Ctx(ctx).Info().Msg("successfully unlocked repo default branch")
+			log.Ctx(ctx).Debug().Msg("successfully unlocked")
 		}
 	}
+
 	return unlockFn, nil
 }

app/services/locker/pullreq.go

@@ -0,0 +1,41 @@
+// Copyright 2023 Harness, Inc.
+//
+// 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 locker
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"time"
+)
+
+func (l Locker) LockPR(
+	ctx context.Context,
+	repoID int64,
+	prNum int64,
+	expiry time.Duration,
+) (func(), error) {
+	key := fmt.Sprintf("%d/pulls", repoID)
+	if prNum != 0 {
+		key += "/" + strconv.FormatInt(prNum, 10)
+	}
+
+	unlockFn, err := l.lock(ctx, namespaceRepo, key, expiry)
+	if err != nil {
+		return nil, fmt.Errorf("failed to lock mutex for pr %d in repo %d: %w", prNum, repoID, err)
+	}
+
+	return unlockFn, nil
+}

app/services/locker/repo.go

@@ -0,0 +1,42 @@
+// Copyright 2023 Harness, Inc.
+//
+// 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 locker
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"time"
+
+	"github.com/rs/zerolog/log"
+)
+
+func (l Locker) LockDefaultBranch(
+	ctx context.Context,
+	repoID int64,
+	branchName string,
+	expiry time.Duration,
+) (func(), error) {
+	key := strconv.FormatInt(repoID, 10) + "/defaultBranch"
+
+	log.Ctx(ctx).Info().Msg("attempting to lock to update the repo default branch")
+
+	unlockFn, err := l.lock(ctx, namespaceRepo, key, expiry)
+	if err != nil {
+		return nil, fmt.Errorf("failed to lock repo to update default branch to %s: %w", branchName, err)
+	}
+
+	return unlockFn, nil
+}

app/services/locker/wire.go

@@ -0,0 +1,29 @@
+// Copyright 2023 Harness, Inc.
+//
+// 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 locker
+
+import (
+	"github.com/harness/gitness/lock"
+
+	"github.com/google/wire"
+)
+
+var WireSet = wire.NewSet(
+	ProvideLocker,
+)
+
+func ProvideLocker(mtxManager lock.MutexManager) *Locker {
+	return NewLocker(mtxManager)
+}

app/services/repo/handlers_default_branch.go

@@ -0,0 +1,93 @@
+// Copyright 2023 Harness, Inc.
+//
+// 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 repo
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/harness/gitness/app/bootstrap"
+	repoevents "github.com/harness/gitness/app/events/repo"
+	"github.com/harness/gitness/app/githook"
+	"github.com/harness/gitness/events"
+	"github.com/harness/gitness/git"
+
+	"github.com/rs/zerolog/log"
+)
+
+// handleUpdateDefaultBranch handles git update default branch using branch name from db (not event payload).
+func (s *Service) handleUpdateDefaultBranch(
+	ctx context.Context,
+	event *events.Event[*repoevents.DefaultBranchUpdatedPayload],
+) error {
+	// the max time we give an update default branch to succeed
+	const timeout = 2 * time.Minute
+	unlock, err := s.locker.LockDefaultBranch(
+		ctx,
+		event.Payload.RepoID,
+		event.Payload.NewName,  // only used for logging
+		timeout+30*time.Second, // add 30s to the lock to give enough time for updating default branch
+	)
+	if err != nil {
+		return fmt.Errorf("failed to lock repo for updating default branch to %s", event.Payload.NewName)
+	}
+	defer unlock()
+
+	repo, err := s.repoStore.Find(ctx, event.Payload.RepoID)
+	if err != nil {
+		return fmt.Errorf("update default branch handler failed to find the repo: %w", err)
+	}
+
+	// create new, time-restricted context to guarantee update completion, even if request is canceled.
+	// TODO: a proper error handling solution required.
+	ctx, cancel := context.WithTimeout(
+		ctx,
+		timeout,
+	)
+	defer cancel()
+
+	systemPrincipal := bootstrap.NewSystemServiceSession().Principal
+	envVars, err := githook.GenerateEnvironmentVariables(
+		ctx,
+		s.urlProvider.GetInternalAPIURL(),
+		repo.ID,
+		systemPrincipal.ID,
+		true,
+		true,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to generate git hook env variables: %w", err)
+	}
+
+	err = s.git.UpdateDefaultBranch(ctx, &git.UpdateDefaultBranchParams{
+		WriteParams: git.WriteParams{
+			Actor: git.Identity{
+				Name:  systemPrincipal.DisplayName,
+				Email: systemPrincipal.Email,
+			},
+			RepoUID: repo.GitUID,
+			EnvVars: envVars,
+		},
+		BranchName: repo.DefaultBranch,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to update the repo default branch to %s", repo.DefaultBranch)
+	}
+
+	log.Ctx(ctx).Info().Msgf("git repo default branch updated to %s by default branch event handler", repo.DefaultBranch)
+
+	return nil
+}

app/services/repo/reposize.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package reposize
+package repo
 
 import (
 	"context"
@@ -30,7 +30,7 @@ import (
 
 const jobType = "repo-size-calculator"
 
-type Calculator struct {
+type SizeCalculator struct {
 	enabled    bool
 	cron       string
 	maxDur     time.Duration
@@ -40,12 +40,12 @@ type Calculator struct {
 	scheduler  *job.Scheduler
 }
 
-func (c *Calculator) Register(ctx context.Context) error {
+func (s *SizeCalculator) Register(ctx context.Context) error {
-	if !c.enabled {
+	if !s.enabled {
 		return nil
 	}
 
-	err := c.scheduler.AddRecurring(ctx, jobType, jobType, c.cron, c.maxDur)
+	err := s.scheduler.AddRecurring(ctx, jobType, jobType, s.cron, s.maxDur)
 	if err != nil {
 		return fmt.Errorf("failed to register recurring job for calculator: %w", err)
 	}
@@ -53,17 +53,17 @@ func (c *Calculator) Register(ctx context.Context) error {
 	return nil
 }
 
-func (c *Calculator) Handle(ctx context.Context, _ string, _ job.ProgressReporter) (string, error) {
+func (s *SizeCalculator) Handle(ctx context.Context, _ string, _ job.ProgressReporter) (string, error) {
-	if !c.enabled {
+	if !s.enabled {
 		return "", nil
 	}
 
-	sizeInfos, err := c.repoStore.ListSizeInfos(ctx)
+	sizeInfos, err := s.repoStore.ListSizeInfos(ctx)
 	if err != nil {
 		return "", fmt.Errorf("failed to get repository sizes: %w", err)
 	}
 
-	expiredBefore := time.Now().Add(c.maxDur)
+	expiredBefore := time.Now().Add(s.maxDur)
 	log.Ctx(ctx).Info().Msgf(
 		"start repo size calculation (operation timeout: %s)",
 		expiredBefore.Format(time.RFC3339Nano),
@@ -71,9 +71,9 @@ func (c *Calculator) Handle(ctx context.Context, _ string, _ job.ProgressReporte
 
 	var wg sync.WaitGroup
 	taskCh := make(chan *types.RepositorySizeInfo)
-	for i := 0; i < c.numWorkers; i++ {
+	for i := 0; i < s.numWorkers; i++ {
 		wg.Add(1)
-		go worker(ctx, c, &wg, taskCh)
+		go worker(ctx, s, &wg, taskCh)
 	}
 	for _, sizeInfo := range sizeInfos {
 		select {
@@ -88,7 +88,7 @@ func (c *Calculator) Handle(ctx context.Context, _ string, _ job.ProgressReporte
 	return "", nil
 }
 
-func worker(ctx context.Context, c *Calculator, wg *sync.WaitGroup, taskCh <-chan *types.RepositorySizeInfo) {
+func worker(ctx context.Context, s *SizeCalculator, wg *sync.WaitGroup, taskCh <-chan *types.RepositorySizeInfo) {
 	defer wg.Done()
 
 	for sizeInfo := range taskCh {
@@ -96,7 +96,7 @@ func worker(ctx context.Context, c *Calculator, wg *sync.WaitGroup, taskCh <-cha
 
 		log.Debug().Msgf("previous repo size: %d", sizeInfo.Size)
 
-		sizeOut, err := c.git.GetRepositorySize(
+		sizeOut, err := s.git.GetRepositorySize(
 			ctx,
 			&git.GetRepositorySizeParams{ReadParams: git.ReadParams{RepoUID: sizeInfo.GitUID}})
 		if err != nil {
@@ -108,7 +108,7 @@ func worker(ctx context.Context, c *Calculator, wg *sync.WaitGroup, taskCh <-cha
 			continue
 		}
 
-		if err := c.repoStore.UpdateSize(ctx, sizeInfo.ID, sizeOut.Size); err != nil {
+		if err := s.repoStore.UpdateSize(ctx, sizeInfo.ID, sizeOut.Size); err != nil {
 			log.Error().Msgf("failed to update repo size: %s", err.Error())
 			continue
 		}

app/services/repo/service.go

@@ -0,0 +1,79 @@
+// Copyright 2023 Harness, Inc.
+//
+// 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 repo
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	repoevents "github.com/harness/gitness/app/events/repo"
+	"github.com/harness/gitness/app/services/locker"
+	"github.com/harness/gitness/app/store"
+	"github.com/harness/gitness/app/url"
+	"github.com/harness/gitness/events"
+	"github.com/harness/gitness/git"
+	"github.com/harness/gitness/stream"
+	"github.com/harness/gitness/types"
+)
+
+const groupRepo = "gitness:repo"
+
+type Service struct {
+	repoEvReporter *repoevents.Reporter
+	repoStore      store.RepoStore
+	urlProvider    url.Provider
+	git            git.Interface
+	locker         *locker.Locker
+}
+
+func NewService(
+	ctx context.Context,
+	config *types.Config,
+	repoEvReporter *repoevents.Reporter,
+	repoReaderFactory *events.ReaderFactory[*repoevents.Reader],
+	repoStore store.RepoStore,
+	urlProvider url.Provider,
+	git git.Interface,
+	locker *locker.Locker,
+) (*Service, error) {
+	service := &Service{
+		repoEvReporter: repoEvReporter,
+		repoStore:      repoStore,
+		urlProvider:    urlProvider,
+		git:            git,
+		locker:         locker,
+	}
+
+	_, err := repoReaderFactory.Launch(ctx, groupRepo, config.InstanceID,
+		func(r *repoevents.Reader) error {
+			const idleTimeout = 15 * time.Second
+			r.Configure(
+				stream.WithConcurrency(1),
+				stream.WithHandlerOptions(
+					stream.WithIdleTimeout(idleTimeout),
+					stream.WithMaxRetries(3),
+				))
+
+			_ = r.RegisterDefaultBranchUpdated(service.handleUpdateDefaultBranch)
+
+			return nil
+		})
+	if err != nil {
+		return nil, fmt.Errorf("failed to launch reader factory for repo git group: %w", err)
+	}
+
+	return service, nil
+}

app/services/repo/wire.go

@@ -12,10 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package reposize
+package repo
 
 import (
+	"context"
+
+	repoevents "github.com/harness/gitness/app/events/repo"
+	"github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/store"
+	"github.com/harness/gitness/app/url"
+	"github.com/harness/gitness/events"
 	"github.com/harness/gitness/git"
 	"github.com/harness/gitness/job"
 	"github.com/harness/gitness/types"
@@ -25,6 +31,7 @@ import (
 
 var WireSet = wire.NewSet(
 	ProvideCalculator,
+	ProvideService,
 )
 
 func ProvideCalculator(
@@ -33,8 +40,8 @@ func ProvideCalculator(
 	repoStore store.RepoStore,
 	scheduler *job.Scheduler,
 	executor *job.Executor,
-) (*Calculator, error) {
+) (*SizeCalculator, error) {
-	job := &Calculator{
+	job := &SizeCalculator{
 		enabled:    config.RepoSize.Enabled,
 		cron:       config.RepoSize.CRON,
 		maxDur:     config.RepoSize.MaxDuration,
@@ -51,3 +58,16 @@ func ProvideCalculator(
 
 	return job, nil
 }
+
+func ProvideService(ctx context.Context,
+	config *types.Config,
+	repoEvReporter *repoevents.Reporter,
+	repoReaderFactory *events.ReaderFactory[*repoevents.Reader],
+	repoStore store.RepoStore,
+	urlProvider url.Provider,
+	git git.Interface,
+	locker *locker.Locker,
+) (*Service, error) {
+	return NewService(ctx, config, repoEvReporter, repoReaderFactory,
+		repoStore, urlProvider, git, locker)
+}

app/services/wire.go

@@ -20,7 +20,7 @@ import (
 	"github.com/harness/gitness/app/services/metric"
 	"github.com/harness/gitness/app/services/notification"
 	"github.com/harness/gitness/app/services/pullreq"
-	"github.com/harness/gitness/app/services/reposize"
+	"github.com/harness/gitness/app/services/repo"
 	"github.com/harness/gitness/app/services/trigger"
 	"github.com/harness/gitness/app/services/webhook"
 	"github.com/harness/gitness/job"
@@ -38,7 +38,8 @@ type Services struct {
 	Trigger            *trigger.Service
 	JobScheduler       *job.Scheduler
 	MetricCollector    *metric.Collector
-	RepoSizeCalculator *reposize.Calculator
+	RepoSizeCalculator *repo.SizeCalculator
+	Repo               *repo.Service
 	Cleanup            *cleanup.Service
 	Notification       *notification.Service
 	Keywordsearch      *keywordsearch.Service
@@ -50,7 +51,8 @@ func ProvideServices(
 	triggerSvc *trigger.Service,
 	jobScheduler *job.Scheduler,
 	metricCollector *metric.Collector,
-	repoSizeCalculator *reposize.Calculator,
+	repoSizeCalculator *repo.SizeCalculator,
+	repo *repo.Service,
 	cleanupSvc *cleanup.Service,
 	notificationSvc *notification.Service,
 	keywordsearchSvc *keywordsearch.Service,
@@ -62,6 +64,7 @@ func ProvideServices(
 		JobScheduler:       jobScheduler,
 		MetricCollector:    metricCollector,
 		RepoSizeCalculator: repoSizeCalculator,
+		Repo:               repo,
 		Cleanup:            cleanupSvc,
 		Notification:       notificationSvc,
 		Keywordsearch:      keywordsearchSvc,

app/store/database/migrate/postgres/0048_alter_table_repo_add_isempty.down.sql

@@ -0,0 +1 @@
+ALTER TABLE repositories DROP COLUMN repo_is_empty;

app/store/database/migrate/postgres/0048_alter_table_repo_add_isempty.up.sql

@@ -0,0 +1 @@
+ALTER TABLE repositories ADD COLUMN repo_is_empty BOOLEAN NOT NULL DEFAULT false;

app/store/database/migrate/sqlite/0048_alter_table_repo_add_isempty.down.sql

@@ -0,0 +1 @@
+ALTER TABLE repositories DROP COLUMN repo_is_empty;

app/store/database/migrate/sqlite/0048_alter_table_repo_add_isempty.up.sql

@@ -0,0 +1 @@
+ALTER TABLE repositories ADD COLUMN repo_is_empty BOOLEAN NOT NULL DEFAULT false;

app/store/database/repo.go

@@ -88,6 +88,7 @@ type repository struct {
 	NumMergedPulls int `db:"repo_num_merged_pulls"`
 
 	Importing bool `db:"repo_importing"`
+	IsEmpty   bool `db:"repo_is_empty"`
 }
 
 const (
@@ -113,7 +114,8 @@ const (
 		,repo_num_closed_pulls
 		,repo_num_open_pulls
 		,repo_num_merged_pulls
-		,repo_importing`
+		,repo_importing
+		,repo_is_empty`
 )
 
 // Find finds the repo by id.
@@ -238,6 +240,7 @@ func (s *RepoStore) Create(ctx context.Context, repo *types.Repository) error {
 			,repo_num_open_pulls
 			,repo_num_merged_pulls
 			,repo_importing
+			,repo_is_empty
 		) values (
 			:repo_version
 			,:repo_parent_id
@@ -260,6 +263,7 @@ func (s *RepoStore) Create(ctx context.Context, repo *types.Repository) error {
 			,:repo_num_open_pulls
 			,:repo_num_merged_pulls
 			,:repo_importing
+			,:repo_is_empty
 		) RETURNING repo_id`
 
 	db := dbtx.GetAccessor(ctx, s.db)
@@ -303,6 +307,7 @@ func (s *RepoStore) Update(ctx context.Context, repo *types.Repository) error {
 			,repo_num_open_pulls = :repo_num_open_pulls
 			,repo_num_merged_pulls = :repo_num_merged_pulls
 			,repo_importing = :repo_importing
+			,repo_is_empty = :repo_is_empty
 		WHERE repo_id = :repo_id AND repo_version = :repo_version - 1`
 
 	dbRepo := mapToInternalRepo(repo)
@@ -746,6 +751,7 @@ func (s *RepoStore) mapToRepo(
 		NumOpenPulls:   in.NumOpenPulls,
 		NumMergedPulls: in.NumMergedPulls,
 		Importing:      in.Importing,
+		IsEmpty:        in.IsEmpty,
 		// Path: is set below
 	}
 
@@ -829,6 +835,7 @@ func mapToInternalRepo(in *types.Repository) *repository {
 		NumOpenPulls:   in.NumOpenPulls,
 		NumMergedPulls: in.NumMergedPulls,
 		Importing:      in.Importing,
+		IsEmpty:        in.IsEmpty,
 	}
 }
 

cmd/gitness/wire.go

@@ -13,7 +13,7 @@ import (
 	checkcontroller "github.com/harness/gitness/app/api/controller/check"
 	"github.com/harness/gitness/app/api/controller/connector"
 	"github.com/harness/gitness/app/api/controller/execution"
-	ctrlgithook "github.com/harness/gitness/app/api/controller/githook"
+	githookCtrl "github.com/harness/gitness/app/api/controller/githook"
 	controllerkeywordsearch "github.com/harness/gitness/app/api/controller/keywordsearch"
 	"github.com/harness/gitness/app/api/controller/limiter"
 	controllerlogs "github.com/harness/gitness/app/api/controller/logs"
@@ -40,7 +40,6 @@ import (
 	gitevents "github.com/harness/gitness/app/events/git"
 	pullreqevents "github.com/harness/gitness/app/events/pullreq"
 	repoevents "github.com/harness/gitness/app/events/repo"
-	"github.com/harness/gitness/app/githook"
 	"github.com/harness/gitness/app/pipeline/canceler"
 	"github.com/harness/gitness/app/pipeline/commit"
 	"github.com/harness/gitness/app/pipeline/converter"
@@ -59,12 +58,13 @@ import (
 	"github.com/harness/gitness/app/services/exporter"
 	"github.com/harness/gitness/app/services/importer"
 	"github.com/harness/gitness/app/services/keywordsearch"
+	locker "github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/services/metric"
 	"github.com/harness/gitness/app/services/notification"
 	"github.com/harness/gitness/app/services/notification/mailer"
 	"github.com/harness/gitness/app/services/protection"
 	pullreqservice "github.com/harness/gitness/app/services/pullreq"
-	"github.com/harness/gitness/app/services/reposize"
+	reposervice "github.com/harness/gitness/app/services/repo"
 	"github.com/harness/gitness/app/services/settings"
 	"github.com/harness/gitness/app/services/trigger"
 	"github.com/harness/gitness/app/services/usergroup"
@@ -142,10 +142,11 @@ func initSystem(ctx context.Context, config *types.Config) (*cliserver.System, e
 		webhook.WireSet,
 		cliserver.ProvideTriggerConfig,
 		trigger.WireSet,
-		githook.WireSet,
+		githookCtrl.ExtenderWireSet,
-		ctrlgithook.WireSet,
+		githookCtrl.WireSet,
 		cliserver.ProvideLockConfig,
 		lock.WireSet,
+		locker.WireSet,
 		cliserver.ProvidePubsubConfig,
 		pubsub.WireSet,
 		cliserver.ProvideJobsConfig,
@@ -178,7 +179,7 @@ func initSystem(ctx context.Context, config *types.Config) (*cliserver.System, e
 		canceler.WireSet,
 		exporter.WireSet,
 		metric.WireSet,
-		reposize.WireSet,
+		reposervice.WireSet,
 		cliserver.ProvideCodeOwnerConfig,
 		codeowners.WireSet,
 		cliserver.ProvideKeywordSearchConfig,

cmd/gitness/wire_gen.go

@@ -12,7 +12,7 @@ import (
 	check2 "github.com/harness/gitness/app/api/controller/check"
 	"github.com/harness/gitness/app/api/controller/connector"
 	"github.com/harness/gitness/app/api/controller/execution"
-	githook2 "github.com/harness/gitness/app/api/controller/githook"
+	"github.com/harness/gitness/app/api/controller/githook"
 	keywordsearch2 "github.com/harness/gitness/app/api/controller/keywordsearch"
 	"github.com/harness/gitness/app/api/controller/limiter"
 	logs2 "github.com/harness/gitness/app/api/controller/logs"
@@ -39,7 +39,6 @@ import (
 	events4 "github.com/harness/gitness/app/events/git"
 	events3 "github.com/harness/gitness/app/events/pullreq"
 	events2 "github.com/harness/gitness/app/events/repo"
-	"github.com/harness/gitness/app/githook"
 	"github.com/harness/gitness/app/pipeline/canceler"
 	"github.com/harness/gitness/app/pipeline/commit"
 	"github.com/harness/gitness/app/pipeline/converter"
@@ -58,12 +57,13 @@ import (
 	"github.com/harness/gitness/app/services/exporter"
 	"github.com/harness/gitness/app/services/importer"
 	"github.com/harness/gitness/app/services/keywordsearch"
+	"github.com/harness/gitness/app/services/locker"
 	"github.com/harness/gitness/app/services/metric"
 	"github.com/harness/gitness/app/services/notification"
 	"github.com/harness/gitness/app/services/notification/mailer"
 	"github.com/harness/gitness/app/services/protection"
 	"github.com/harness/gitness/app/services/pullreq"
-	"github.com/harness/gitness/app/services/reposize"
+	repo2 "github.com/harness/gitness/app/services/repo"
 	"github.com/harness/gitness/app/services/settings"
 	trigger2 "github.com/harness/gitness/app/services/trigger"
 	"github.com/harness/gitness/app/services/usergroup"
@@ -192,9 +192,10 @@ func initSystem(ctx context.Context, config *types.Config) (*server.System, erro
 	if err != nil {
 		return nil, err
 	}
+	lockerLocker := locker.ProvideLocker(mutexManager)
 	repoIdentifier := check.ProvideRepoIdentifierCheck()
 	repoCheck := repo.ProvideRepoCheck()
-	repoController := repo.ProvideController(config, transactor, provider, authorizer, repoStore, spaceStore, pipelineStore, principalStore, ruleStore, settingsService, principalInfoCache, protectionManager, gitInterface, repository, codeownersService, reporter, indexer, resourceLimiter, mutexManager, repoIdentifier, repoCheck)
+	repoController := repo.ProvideController(config, transactor, provider, authorizer, repoStore, spaceStore, pipelineStore, principalStore, ruleStore, settingsService, principalInfoCache, protectionManager, gitInterface, repository, codeownersService, reporter, indexer, resourceLimiter, lockerLocker, mutexManager, repoIdentifier, repoCheck)
 	reposettingsController := reposettings.ProvideController(authorizer, repoStore, settingsService)
 	executionStore := database.ProvideExecutionStore(db)
 	checkStore := database.ProvideCheckStore(db, principalInfoCache)
@@ -254,7 +255,7 @@ func initSystem(ctx context.Context, config *types.Config) (*server.System, erro
 	if err != nil {
 		return nil, err
 	}
-	pullreqController := pullreq2.ProvideController(transactor, provider, authorizer, pullReqStore, pullReqActivityStore, codeCommentView, pullReqReviewStore, pullReqReviewerStore, repoStore, principalStore, pullReqFileViewStore, membershipStore, checkStore, gitInterface, eventsReporter, mutexManager, migrator, pullreqService, protectionManager, streamer, codeownersService)
+	pullreqController := pullreq2.ProvideController(transactor, provider, authorizer, pullReqStore, pullReqActivityStore, codeCommentView, pullReqReviewStore, pullReqReviewerStore, repoStore, principalStore, pullReqFileViewStore, membershipStore, checkStore, gitInterface, eventsReporter, migrator, pullreqService, protectionManager, streamer, codeownersService, lockerLocker)
 	webhookConfig := server.ProvideWebhookConfig(config)
 	webhookStore := database.ProvideWebhookStore(db)
 	webhookExecutionStore := database.ProvideWebhookExecutionStore(db)
@@ -267,19 +268,19 @@ func initSystem(ctx context.Context, config *types.Config) (*server.System, erro
 	if err != nil {
 		return nil, err
 	}
-	preReceiveExtender, err := githook2.ProvidePreReceiveExtender()
+	preReceiveExtender, err := githook.ProvidePreReceiveExtender()
 	if err != nil {
 		return nil, err
 	}
-	updateExtender, err := githook2.ProvideUpdateExtender()
+	updateExtender, err := githook.ProvideUpdateExtender()
 	if err != nil {
 		return nil, err
 	}
-	postReceiveExtender, err := githook2.ProvidePostReceiveExtender()
+	postReceiveExtender, err := githook.ProvidePostReceiveExtender()
 	if err != nil {
 		return nil, err
 	}
-	githookController := githook.ProvideController(authorizer, principalStore, repoStore, reporter2, gitInterface, pullReqStore, provider, protectionManager, clientFactory, resourceLimiter, settingsService, preReceiveExtender, updateExtender, postReceiveExtender)
+	githookController := githook.ProvideController(authorizer, principalStore, repoStore, reporter2, reporter, gitInterface, pullReqStore, provider, protectionManager, clientFactory, resourceLimiter, settingsService, preReceiveExtender, updateExtender, postReceiveExtender)
 	serviceaccountController := serviceaccount.NewController(principalUID, authorizer, principalStore, spaceStore, repoStore, tokenStore)
 	principalController := principal.ProvideController(principalStore)
 	v := check2.ProvideCheckSanitizers()
@@ -319,7 +320,15 @@ func initSystem(ctx context.Context, config *types.Config) (*server.System, erro
 	if err != nil {
 		return nil, err
 	}
-	calculator, err := reposize.ProvideCalculator(config, gitInterface, repoStore, jobScheduler, executor)
+	sizeCalculator, err := repo2.ProvideCalculator(config, gitInterface, repoStore, jobScheduler, executor)
+	if err != nil {
+		return nil, err
+	}
+	readerFactory2, err := events2.ProvideReaderFactory(eventsSystem)
+	if err != nil {
+		return nil, err
+	}
+	repoService, err := repo2.ProvideService(ctx, config, reporter, readerFactory2, repoStore, provider, gitInterface, lockerLocker)
 	if err != nil {
 		return nil, err
 	}
@@ -336,11 +345,11 @@ func initSystem(ctx context.Context, config *types.Config) (*server.System, erro
 		return nil, err
 	}
 	keywordsearchConfig := server.ProvideKeywordSearchConfig(config)
-	keywordsearchService, err := keywordsearch.ProvideService(ctx, keywordsearchConfig, readerFactory, repoStore, indexer)
+	keywordsearchService, err := keywordsearch.ProvideService(ctx, keywordsearchConfig, readerFactory, readerFactory2, repoStore, indexer)
 	if err != nil {
 		return nil, err
 	}
-	servicesServices := services.ProvideServices(webhookService, pullreqService, triggerService, jobScheduler, collector, calculator, cleanupService, notificationService, keywordsearchService)
+	servicesServices := services.ProvideServices(webhookService, pullreqService, triggerService, jobScheduler, collector, sizeCalculator, repoService, cleanupService, notificationService, keywordsearchService)
 	serverSystem := server.NewSystem(bootstrapBootstrap, serverServer, poller, resolverManager, servicesServices)
 	return serverSystem, nil
 }

types/repo.go

@@ -50,6 +50,7 @@ type Repository struct {
 	NumMergedPulls int `json:"num_merged_pulls"`
 
 	Importing bool `json:"importing"`
+	IsEmpty   bool `json:"is_empty,omitempty"`
 
 	// git urls
 	GitURL string `json:"git_url"`