Add Close() method to gogitRepository (#8901) (#8956)

Backport #8901 

In investigating #7947 it has become clear that the storage component of go-git repositories needs closing.

This PR adds this Close function and adds the Close functions as necessary.

In TransferOwnership the ctx.Repo.GitRepo is closed if it is open to help prevent the risk of multiple open files.

Fixes #7947

72 files changed, 386 insertions, 102 deletions

diff --git a/cmd/admin.go b/cmd/admin.go
index 4346159feb..32ec665ff6 100644
--- a/cmd/admin.go
+++ b/cmd/admin.go
@@ -375,17 +375,20 @@ func runRepoSyncReleases(c *cli.Context) error {
 
 			if err = models.SyncReleasesWithTags(repo, gitRepo); err != nil {
 				log.Warn(" SyncReleasesWithTags: %v", err)
+				gitRepo.Close()
 				continue
 			}
 
 			count, err = getReleaseCount(repo.ID)
 			if err != nil {
 				log.Warn(" GetReleaseCountByRepoID: %v", err)
+				gitRepo.Close()
 				continue
 			}
 
 			log.Trace(" repo %s releases synchronized to tags: from %d to %d",
 				repo.FullName(), oldnum, count)
+			gitRepo.Close()
 		}
 	}
 
diff --git a/docs/content/doc/advanced/migrations.en-us.md b/docs/content/doc/advanced/migrations.en-us.md
index 2511f7af89..0d9d8b49a7 100644
--- a/docs/content/doc/advanced/migrations.en-us.md
+++ b/docs/content/doc/advanced/migrations.en-us.md
@@ -68,6 +68,7 @@ type Uploader interface {
 	CreateComment(issueNumber int64, comment *Comment) error
 	CreatePullRequest(pr *PullRequest) error
 	Rollback() error
+	Close()
 }
 
-```
\ No newline at end of file
+```
diff --git a/integrations/api_releases_test.go b/integrations/api_releases_test.go
index 897f863eb3..8025f1de5d 100644
--- a/integrations/api_releases_test.go
+++ b/integrations/api_releases_test.go
@@ -51,6 +51,7 @@ func TestAPICreateAndUpdateRelease(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repo.RepoPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	err = gitRepo.CreateTag("v0.0.1", "master")
 	assert.NoError(t, err)
@@ -112,6 +113,7 @@ func TestAPICreateReleaseToDefaultBranchOnExistingTag(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repo.RepoPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	err = gitRepo.CreateTag("v0.0.1", "master")
 	assert.NoError(t, err)
diff --git a/integrations/api_repo_file_create_test.go b/integrations/api_repo_file_create_test.go
index 42898bf259..948d3b6f1c 100644
--- a/integrations/api_repo_file_create_test.go
+++ b/integrations/api_repo_file_create_test.go
@@ -139,6 +139,7 @@ func TestAPICreateFile(t *testing.T) {
 			assert.EqualValues(t, expectedFileResponse.Commit.HTMLURL, fileResponse.Commit.HTMLURL)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Email, fileResponse.Commit.Author.Email)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Name, fileResponse.Commit.Author.Name)
+			gitRepo.Close()
 		}
 
 		// Test creating a file in a new branch
diff --git a/integrations/api_repo_file_update_test.go b/integrations/api_repo_file_update_test.go
index 366eb5e918..c19d8d9582 100644
--- a/integrations/api_repo_file_update_test.go
+++ b/integrations/api_repo_file_update_test.go
@@ -143,6 +143,7 @@ func TestAPIUpdateFile(t *testing.T) {
 			assert.EqualValues(t, expectedFileResponse.Commit.HTMLURL, fileResponse.Commit.HTMLURL)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Email, fileResponse.Commit.Author.Email)
 			assert.EqualValues(t, expectedFileResponse.Commit.Author.Name, fileResponse.Commit.Author.Name)
+			gitRepo.Close()
 		}
 
 		// Test updating a file in a new branch
diff --git a/integrations/api_repo_get_contents_list_test.go b/integrations/api_repo_get_contents_list_test.go
index f74ceb514a..4605ccf4d9 100644
--- a/integrations/api_repo_get_contents_list_test.go
+++ b/integrations/api_repo_get_contents_list_test.go
@@ -74,6 +74,8 @@ func testAPIGetContentsList(t *testing.T, u *url.URL) {
 	repo1.CreateNewBranch(user2, repo1.DefaultBranch, newBranch)
 	// Get the commit ID of the default branch
 	gitRepo, _ := git.OpenRepository(repo1.RepoPath())
+	defer gitRepo.Close()
+
 	commitID, _ := gitRepo.GetBranchCommitID(repo1.DefaultBranch)
 	// Make a new tag in repo1
 	newTag := "test_tag"
diff --git a/integrations/api_repo_get_contents_test.go b/integrations/api_repo_get_contents_test.go
index f6a43bc5c6..77a827ec61 100644
--- a/integrations/api_repo_get_contents_test.go
+++ b/integrations/api_repo_get_contents_test.go
@@ -75,6 +75,8 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	repo1.CreateNewBranch(user2, repo1.DefaultBranch, newBranch)
 	// Get the commit ID of the default branch
 	gitRepo, _ := git.OpenRepository(repo1.RepoPath())
+	defer gitRepo.Close()
+
 	commitID, _ := gitRepo.GetBranchCommitID(repo1.DefaultBranch)
 	// Make a new tag in repo1
 	newTag := "test_tag"
diff --git a/integrations/api_repo_git_tags_test.go b/integrations/api_repo_git_tags_test.go
index ae519249e0..d6ff08990a 100644
--- a/integrations/api_repo_git_tags_test.go
+++ b/integrations/api_repo_git_tags_test.go
@@ -29,6 +29,8 @@ func TestAPIGitTags(t *testing.T) {
 	git.NewCommand("config", "user.email", user.Email).RunInDir(repo.RepoPath())
 
 	gitRepo, _ := git.OpenRepository(repo.RepoPath())
+	defer gitRepo.Close()
+
 	commit, _ := gitRepo.GetBranchCommit("master")
 	lTagName := "lightweightTag"
 	gitRepo.CreateTag(lTagName, commit.ID.String())
diff --git a/integrations/repofiles_delete_test.go b/integrations/repofiles_delete_test.go
index f4cb4510be..10742bf0b9 100644
--- a/integrations/repofiles_delete_test.go
+++ b/integrations/repofiles_delete_test.go
@@ -73,6 +73,7 @@ func testDeleteRepoFile(t *testing.T, u *url.URL) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
 	repo := ctx.Repo.Repository
 	doer := ctx.User
 	opts := getDeleteRepoFileOptions(repo)
@@ -111,6 +112,8 @@ func testDeleteRepoFileWithoutBranchNames(t *testing.T, u *url.URL) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	doer := ctx.User
 	opts := getDeleteRepoFileOptions(repo)
@@ -139,6 +142,8 @@ func TestDeleteRepoFileErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	doer := ctx.User
 
diff --git a/integrations/repofiles_update_test.go b/integrations/repofiles_update_test.go
index a4ce16d847..5b88bb8198 100644
--- a/integrations/repofiles_update_test.go
+++ b/integrations/repofiles_update_test.go
@@ -191,6 +191,8 @@ func TestCreateOrUpdateRepoFileForCreate(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getCreateRepoFileOptions(repo)
@@ -201,6 +203,8 @@ func TestCreateOrUpdateRepoFileForCreate(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commitID, _ := gitRepo.GetBranchCommitID(opts.NewBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesCreate(commitID)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -220,6 +224,8 @@ func TestCreateOrUpdateRepoFileForUpdate(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getUpdateRepoFileOptions(repo)
@@ -230,6 +236,8 @@ func TestCreateOrUpdateRepoFileForUpdate(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commitID, _ := gitRepo.GetBranchCommitID(opts.NewBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commitID, opts.TreePath)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -249,6 +257,8 @@ func TestCreateOrUpdateRepoFileForUpdateWithFileMove(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getUpdateRepoFileOptions(repo)
@@ -261,6 +271,8 @@ func TestCreateOrUpdateRepoFileForUpdateWithFileMove(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commit, _ := gitRepo.GetBranchCommit(opts.NewBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commit.ID.String(), opts.TreePath)
 		// assert that the old file no longer exists in the last commit of the branch
@@ -288,6 +300,8 @@ func TestCreateOrUpdateRepoFileWithoutBranchNames(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 		opts := getUpdateRepoFileOptions(repo)
@@ -300,6 +314,8 @@ func TestCreateOrUpdateRepoFileWithoutBranchNames(t *testing.T) {
 		// asserts
 		assert.Nil(t, err)
 		gitRepo, _ := git.OpenRepository(repo.RepoPath())
+		defer gitRepo.Close()
+
 		commitID, _ := gitRepo.GetBranchCommitID(repo.DefaultBranch)
 		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commitID, opts.TreePath)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -315,6 +331,8 @@ func TestCreateOrUpdateRepoFileErrors(t *testing.T) {
 		test.LoadRepoCommit(t, ctx)
 		test.LoadUser(t, ctx, 2)
 		test.LoadGitRepo(t, ctx)
+		defer ctx.Repo.GitRepo.Close()
+
 		repo := ctx.Repo.Repository
 		doer := ctx.User
 
diff --git a/models/graph_test.go b/models/graph_test.go
index 5c78e3877b..4e104592a3 100644
--- a/models/graph_test.go
+++ b/models/graph_test.go
@@ -17,6 +17,7 @@ func BenchmarkGetCommitGraph(b *testing.B) {
 	if err != nil {
 		b.Error("Could not open repository")
 	}
+	defer currentRepo.Close()
 
 	for i := 0; i < b.N; i++ {
 		graph, err := GetCommitGraph(currentRepo)
diff --git a/models/migrations/v39.go b/models/migrations/v39.go
index 1312cb3313..992e06bcaa 100644
--- a/models/migrations/v39.go
+++ b/models/migrations/v39.go
@@ -47,6 +47,7 @@ func releaseAddColumnIsTagAndSyncTags(x *xorm.Engine) error {
 			if err = models.SyncReleasesWithTags(repo, gitRepo); err != nil {
 				log.Warn("SyncReleasesWithTags: %v", err)
 			}
+			gitRepo.Close()
 		}
 		if len(repos) < pageSize {
 			break
diff --git a/models/migrations/v82.go b/models/migrations/v82.go
index eb73f18343..83da703c8a 100644
--- a/models/migrations/v82.go
+++ b/models/migrations/v82.go
@@ -91,6 +91,7 @@ func fixReleaseSha1OnReleaseTable(x *xorm.Engine) error {
 				if err != nil {
 					return err
 				}
+				defer gitRepo.Close()
 				gitRepoCache[release.RepoID] = gitRepo
 			}
 
diff --git a/models/pull.go b/models/pull.go
index 2016874574..f93257008b 100644
--- a/models/pull.go
+++ b/models/pull.go
@@ -382,6 +382,7 @@ func (pr *PullRequest) GetLastCommitStatus() (status *CommitStatus, err error) {
 	if err != nil {
 		return nil, err
 	}
+	defer headGitRepo.Close()
 
 	lastCommitID, err := headGitRepo.GetBranchCommitID(pr.HeadBranch)
 	if err != nil {
@@ -571,6 +572,7 @@ func (pr *PullRequest) getMergeCommit() (*git.Commit, error) {
 	if err != nil {
 		return nil, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	commit, err := gitRepo.GetCommit(mergeCommit[:40])
 	if err != nil {
@@ -955,6 +957,7 @@ func (pr *PullRequest) UpdatePatch() (err error) {
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer headGitRepo.Close()
 
 	// Add a temporary remote.
 	tmpRemote := com.ToStr(time.Now().UnixNano())
@@ -996,6 +999,7 @@ func (pr *PullRequest) PushToBaseRepo() (err error) {
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer headGitRepo.Close()
 
 	tmpRemoteName := fmt.Sprintf("tmp-pull-%d", pr.ID)
 	if err = headGitRepo.AddRemote(tmpRemoteName, pr.BaseRepo.RepoPath(), false); err != nil {
@@ -1185,6 +1189,7 @@ func checkForInvalidation(requests PullRequestList, repoID int64, doer *User, br
 		if err != nil {
 			log.Error("PullRequestList.InvalidateCodeComments: %v", err)
 		}
+		gitRepo.Close()
 	}()
 	return nil
 }
diff --git a/models/repo.go b/models/repo.go
index d8a462c37b..8875c96376 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -998,6 +998,7 @@ func MigrateRepositoryGitData(doer, u *User, repo *Repository, opts api.MigrateR
 	if err != nil {
 		return repo, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	repo.IsEmpty, err = gitRepo.IsEmpty()
 	if err != nil {
diff --git a/models/repo_activity.go b/models/repo_activity.go
index 04612ae1ef..c95af85495 100644
--- a/models/repo_activity.go
+++ b/models/repo_activity.go
@@ -64,6 +64,8 @@ func GetActivityStats(repo *Repository, timeFrom time.Time, releases, issues, pr
 		if err != nil {
 			return nil, fmt.Errorf("OpenRepository: %v", err)
 		}
+		defer gitRepo.Close()
+
 		code, err := gitRepo.GetCodeActivityStats(timeFrom, repo.DefaultBranch)
 		if err != nil {
 			return nil, fmt.Errorf("FillFromGit: %v", err)
@@ -79,6 +81,8 @@ func GetActivityStatsTopAuthors(repo *Repository, timeFrom time.Time, count int)
 	if err != nil {
 		return nil, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
+
 	code, err := gitRepo.GetCodeActivityStats(timeFrom, "")
 	if err != nil {
 		return nil, fmt.Errorf("FillFromGit: %v", err)
diff --git a/models/repo_branch.go b/models/repo_branch.go
index dee6ef3d7e..c513231836 100644
--- a/models/repo_branch.go
+++ b/models/repo_branch.go
@@ -23,6 +23,7 @@ func (repo *Repository) GetBranch(branch string) (*git.Branch, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	return gitRepo.GetBranch(branch)
 }
@@ -38,6 +39,7 @@ func (repo *Repository) CheckBranchName(name string) error {
 	if err != nil {
 		return err
 	}
+	defer gitRepo.Close()
 
 	branches, err := repo.GetBranches()
 	if err != nil {
@@ -94,6 +96,7 @@ func (repo *Repository) CreateNewBranch(doer *User, oldBranchName, branchName st
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if err = gitRepo.CreateBranch(branchName, oldBranchName); err != nil {
 		log.Error("Unable to create branch: %s from %s. (%v)", branchName, oldBranchName, err)
@@ -140,6 +143,7 @@ func (repo *Repository) CreateNewBranchFromCommit(doer *User, commit, branchName
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if err = gitRepo.CreateBranch(branchName, commit); err != nil {
 		log.Error("Unable to create branch: %s from %s. (%v)", branchName, commit, err)
diff --git a/models/repo_tag.go b/models/repo_tag.go
deleted file mode 100644
index 3864b7a12a..0000000000
--- a/models/repo_tag.go
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2019 The Gitea Authors. All rights reserved.
-// Use of this source code is governed by a MIT-style
-// license that can be found in the LICENSE file.
-
-package models
-
-import (
-	"code.gitea.io/gitea/modules/git"
-)
-
-// GetTagsByPath returns repo tags by its path
-func GetTagsByPath(path string) ([]*git.Tag, error) {
-	gitRepo, err := git.OpenRepository(path)
-	if err != nil {
-		return nil, err
-	}
-
-	return gitRepo.GetTagInfos()
-}
-
-// GetTags return repo's tags
-func (repo *Repository) GetTags() ([]*git.Tag, error) {
-	return GetTagsByPath(repo.RepoPath())
-}
diff --git a/models/wiki.go b/models/wiki.go
index 0460e0f079..8a2f739dad 100644
--- a/models/wiki.go
+++ b/models/wiki.go
@@ -140,6 +140,7 @@ func (repo *Repository) updateWikiPage(doer *User, oldWikiName, newWikiName, con
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if hasMasterBranch {
 		if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
@@ -276,6 +277,7 @@ func (repo *Repository) DeleteWikiPage(doer *User, wikiName string) (err error)
 		log.Error("Unable to open temporary repository: %s (%v)", basePath, err)
 		return fmt.Errorf("Failed to open new temporary repository in: %s %v", basePath, err)
 	}
+	defer gitRepo.Close()
 
 	if err := gitRepo.ReadTreeToIndex("HEAD"); err != nil {
 		log.Error("Unable to read HEAD tree to index in: %s %v", basePath, err)
diff --git a/models/wiki_test.go b/models/wiki_test.go
index 991a3d95b9..37c0a86635 100644
--- a/models/wiki_test.go
+++ b/models/wiki_test.go
@@ -161,6 +161,7 @@ func TestRepository_AddWikiPage(t *testing.T) {
 			// Now need to show that the page has been added:
 			gitRepo, err := git.OpenRepository(repo.WikiPath())
 			assert.NoError(t, err)
+			defer gitRepo.Close()
 			masterTree, err := gitRepo.GetTree("master")
 			assert.NoError(t, err)
 			wikiPath := WikiNameToFilename(wikiName)
@@ -214,6 +215,7 @@ func TestRepository_EditWikiPage(t *testing.T) {
 			_, err := masterTree.GetTreeEntryByPath("Home.md")
 			assert.Error(t, err)
 		}
+		gitRepo.Close()
 	}
 }
 
@@ -226,6 +228,7 @@ func TestRepository_DeleteWikiPage(t *testing.T) {
 	// Now need to show that the page has been added:
 	gitRepo, err := git.OpenRepository(repo.WikiPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 	masterTree, err := gitRepo.GetTree("master")
 	assert.NoError(t, err)
 	wikiPath := WikiNameToFilename("Home")
diff --git a/modules/context/api.go b/modules/context/api.go
index 024ae487f1..c1de37dd21 100644
--- a/modules/context/api.go
+++ b/modules/context/api.go
@@ -186,7 +186,16 @@ func ReferencesGitRepo(allowEmpty bool) macaron.Handler {
 				return
 			}
 			ctx.Repo.GitRepo = gitRepo
+			// We opened it, we should close it
+			defer func() {
+				// If it's been set to nil then assume someone else has closed it.
+				if ctx.Repo.GitRepo != nil {
+					ctx.Repo.GitRepo.Close()
+				}
+			}()
 		}
+
+		ctx.Next()
 	}
 }
 
diff --git a/modules/context/repo.go b/modules/context/repo.go
index 243b98c7c3..1b57b42006 100644
--- a/modules/context/repo.go
+++ b/modules/context/repo.go
@@ -427,9 +427,18 @@ func RepoAssignment() macaron.Handler {
 		}
 		ctx.Repo.GitRepo = gitRepo
 
+		// We opened it, we should close it
+		defer func() {
+			// If it's been set to nil then assume someone else has closed it.
+			if ctx.Repo.GitRepo != nil {
+				ctx.Repo.GitRepo.Close()
+			}
+		}()
+
 		// Stop at this point when the repo is empty.
 		if ctx.Repo.Repository.IsEmpty {
 			ctx.Data["BranchName"] = ctx.Repo.Repository.DefaultBranch
+			ctx.Next()
 			return
 		}
 
@@ -488,6 +497,7 @@ func RepoAssignment() macaron.Handler {
 			ctx.Data["GoDocDirectory"] = prefix + "{/dir}"
 			ctx.Data["GoDocFile"] = prefix + "{/dir}/{file}#L{line}"
 		}
+		ctx.Next()
 	}
 }
 
@@ -593,6 +603,13 @@ func RepoRefByType(refType RepoRefType) macaron.Handler {
 				ctx.ServerError("RepoRef Invalid repo "+repoPath, err)
 				return
 			}
+			// We opened it, we should close it
+			defer func() {
+				// If it's been set to nil then assume someone else has closed it.
+				if ctx.Repo.GitRepo != nil {
+					ctx.Repo.GitRepo.Close()
+				}
+			}()
 		}
 
 		// Get default branch.
@@ -681,6 +698,8 @@ func RepoRefByType(refType RepoRefType) macaron.Handler {
 			return
 		}
 		ctx.Data["CommitsCount"] = ctx.Repo.CommitsCount
+
+		ctx.Next()
 	}
 }
 
diff --git a/modules/git/blame.go b/modules/git/blame.go
index 548236b657..4f4343fe96 100644
--- a/modules/git/blame.go
+++ b/modules/git/blame.go
@@ -87,10 +87,11 @@ func (r *BlameReader) Close() error {
 
 // CreateBlameReader creates reader for given repository, commit and file
 func CreateBlameReader(repoPath, commitID, file string) (*BlameReader, error) {
-	_, err := OpenRepository(repoPath)
+	gitRepo, err := OpenRepository(repoPath)
 	if err != nil {
 		return nil, err
 	}
+	gitRepo.Close()
 
 	return createBlameReader(repoPath, GitExecutable, "blame", commitID, "--porcelain", "--", file)
 }
diff --git a/modules/git/blob_test.go b/modules/git/blob_test.go
index 66c046ecc8..9043de5955 100644
--- a/modules/git/blob_test.go
+++ b/modules/git/blob_test.go
@@ -37,6 +37,8 @@ THE SOFTWARE.
 `
 	repo, err := OpenRepository("../../.git")
 	assert.NoError(t, err)
+	defer repo.Close()
+
 	testBlob, err := repo.GetBlob("a8d4b49dd073a4a38a7e58385eeff7cc52568697")
 	assert.NoError(t, err)
 
@@ -55,6 +57,8 @@ func Benchmark_Blob_Data(b *testing.B) {
 	if err != nil {
 		b.Fatal(err)
 	}
+	defer repo.Close()
+
 	testBlob, err := repo.GetBlob("a8d4b49dd073a4a38a7e58385eeff7cc52568697")
 	if err != nil {
 		b.Fatal(err)
diff --git a/modules/git/commit_info_test.go b/modules/git/commit_info_test.go
index 71637d188a..ac7bc43c4e 100644
--- a/modules/git/commit_info_test.go
+++ b/modules/git/commit_info_test.go
@@ -77,6 +77,8 @@ func TestEntries_GetCommitsInfo(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
+
 	testGetCommitsInfo(t, bareRepo1)
 
 	clonedPath, err := cloneRepo(bareRepo1Path, testReposDir, "repo1_TestEntries_GetCommitsInfo")
@@ -84,6 +86,8 @@ func TestEntries_GetCommitsInfo(t *testing.T) {
 	defer os.RemoveAll(clonedPath)
 	clonedRepo1, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer clonedRepo1.Close()
+
 	testGetCommitsInfo(t, clonedRepo1)
 }
 
@@ -101,13 +105,16 @@ func BenchmarkEntries_GetCommitsInfo(b *testing.B) {
 	for _, benchmark := range benchmarks {
 		var commit *Commit
 		var entries Entries
+		var repo *Repository
 		if repoPath, err := cloneRepo(benchmark.url, benchmarkReposDir, benchmark.name); err != nil {
 			b.Fatal(err)
-		} else if repo, err := OpenRepository(repoPath); err != nil {
+		} else if repo, err = OpenRepository(repoPath); err != nil {
 			b.Fatal(err)
 		} else if commit, err = repo.GetBranchCommit("master"); err != nil {
+			repo.Close()
 			b.Fatal(err)
 		} else if entries, err = commit.Tree.ListEntries(); err != nil {
+			repo.Close()
 			b.Fatal(err)
 		}
 		entries.Sort()
@@ -120,5 +127,6 @@ func BenchmarkEntries_GetCommitsInfo(b *testing.B) {
 				}
 			}
 		})
+		repo.Close()
 	}
 }
diff --git a/modules/git/notes_test.go b/modules/git/notes_test.go
index bf010b9a71..b7939e6913 100644
--- a/modules/git/notes_test.go
+++ b/modules/git/notes_test.go
@@ -15,6 +15,7 @@ func TestGetNotes(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	note := Note{}
 	err = GetNote(bareRepo1, "95bb4d39648ee7e325106df01a621c530863a653", &note)
@@ -27,6 +28,7 @@ func TestGetNestedNotes(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo3_notes")
 	repo, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer repo.Close()
 
 	note := Note{}
 	err = GetNote(repo, "3e668dbfac39cbc80a9ff9c61eb565d944453ba4", &note)
diff --git a/modules/git/repo.go b/modules/git/repo.go
index 1a9112132f..f3453442c9 100644
--- a/modules/git/repo.go
+++ b/modules/git/repo.go
@@ -17,6 +17,7 @@ import (
 	"strings"
 	"time"
 
+	gitealog "code.gitea.io/gitea/modules/log"
 	"github.com/unknwon/com"
 	"gopkg.in/src-d/go-billy.v4/osfs"
 	gogit "gopkg.in/src-d/go-git.v4"
@@ -107,6 +108,21 @@ func OpenRepository(repoPath string) (*Repository, error) {
 	}, nil
 }
 
+// Close this repository, in particular close the underlying gogitStorage if this is not nil
+func (repo *Repository) Close() {
+	if repo == nil || repo.gogitStorage == nil {
+		return
+	}
+	if err := repo.gogitStorage.Close(); err != nil {
+		gitealog.Error("Error closing storage: %v", err)
+	}
+}
+
+// GoGitRepo gets the go-git repo representation
+func (repo *Repository) GoGitRepo() *gogit.Repository {
+	return repo.gogitRepo
+}
+
 // IsEmpty Check if repository is empty.
 func (repo *Repository) IsEmpty() (bool, error) {
 	var errbuf strings.Builder
diff --git a/modules/git/repo_blob_test.go b/modules/git/repo_blob_test.go
index 128a227829..52a124db2a 100644
--- a/modules/git/repo_blob_test.go
+++ b/modules/git/repo_blob_test.go
@@ -17,6 +17,7 @@ func TestRepository_GetBlob_Found(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo1_bare")
 	r, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer r.Close()
 
 	testCases := []struct {
 		OID  string
@@ -44,6 +45,7 @@ func TestRepository_GetBlob_NotExist(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo1_bare")
 	r, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer r.Close()
 
 	testCase := "0000000000000000000000000000000000000000"
 	testError := ErrNotExist{testCase, ""}
@@ -57,6 +59,7 @@ func TestRepository_GetBlob_NoId(t *testing.T) {
 	repoPath := filepath.Join(testReposDir, "repo1_bare")
 	r, err := OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer r.Close()
 
 	testCase := ""
 	testError := fmt.Errorf("Length must be 40: %s", testCase)
diff --git a/modules/git/repo_branch.go b/modules/git/repo_branch.go
index a2bf9ac973..e79bab76a6 100644
--- a/modules/git/repo_branch.go
+++ b/modules/git/repo_branch.go
@@ -108,6 +108,7 @@ func GetBranchesByPath(path string) ([]*Branch, error) {
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	brs, err := gitRepo.GetBranches()
 	if err != nil {
diff --git a/modules/git/repo_branch_test.go b/modules/git/repo_branch_test.go
index 08736d702e..33d31aef68 100644
--- a/modules/git/repo_branch_test.go
+++ b/modules/git/repo_branch_test.go
@@ -15,6 +15,7 @@ func TestRepository_GetBranches(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	branches, err := bareRepo1.GetBranches()
 
@@ -29,6 +30,7 @@ func BenchmarkRepository_GetBranches(b *testing.B) {
 	if err != nil {
 		b.Fatal(err)
 	}
+	defer bareRepo1.Close()
 
 	for i := 0; i < b.N; i++ {
 		_, err := bareRepo1.GetBranches()
diff --git a/modules/git/repo_commit_test.go b/modules/git/repo_commit_test.go
index 6d8ee6453f..87dd6763b3 100644
--- a/modules/git/repo_commit_test.go
+++ b/modules/git/repo_commit_test.go
@@ -15,6 +15,7 @@ func TestRepository_GetCommitBranches(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	// these test case are specific to the repo1_bare test repo
 	testCases := []struct {
@@ -41,6 +42,7 @@ func TestGetTagCommitWithSignature(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	commit, err := bareRepo1.GetCommit("3ad28a9149a2864384548f3d17ed7f38014c9e8a")
 	assert.NoError(t, err)
@@ -54,6 +56,7 @@ func TestGetCommitWithBadCommitID(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	commit, err := bareRepo1.GetCommit("bad_branch")
 	assert.Nil(t, commit)
diff --git a/modules/git/repo_compare_test.go b/modules/git/repo_compare_test.go
index e194788773..def67fa87b 100644
--- a/modules/git/repo_compare_test.go
+++ b/modules/git/repo_compare_test.go
@@ -20,6 +20,7 @@ func TestGetFormatPatch(t *testing.T) {
 	defer os.RemoveAll(clonedPath)
 	repo, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer repo.Close()
 	rd, err := repo.GetFormatPatch("8d92fc95^", "8d92fc95")
 	assert.NoError(t, err)
 	patchb, err := ioutil.ReadAll(rd)
diff --git a/modules/git/repo_ref_test.go b/modules/git/repo_ref_test.go
index d32b34994c..303c496c1d 100644
--- a/modules/git/repo_ref_test.go
+++ b/modules/git/repo_ref_test.go
@@ -15,6 +15,7 @@ func TestRepository_GetRefs(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	refs, err := bareRepo1.GetRefs()
 
@@ -38,6 +39,7 @@ func TestRepository_GetRefsFiltered(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	refs, err := bareRepo1.GetRefsFiltered(TagPrefix)
 
diff --git a/modules/git/repo_stats_test.go b/modules/git/repo_stats_test.go
index 6fbcb7ac13..bc1f6a5662 100644
--- a/modules/git/repo_stats_test.go
+++ b/modules/git/repo_stats_test.go
@@ -16,6 +16,7 @@ func TestRepository_GetCodeActivityStats(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	timeFrom, err := time.Parse(time.RFC3339, "2016-01-01T00:00:00+00:00")
 	assert.NoError(t, err)
diff --git a/modules/git/repo_tag_test.go b/modules/git/repo_tag_test.go
index ab9742afc5..90f2b37358 100644
--- a/modules/git/repo_tag_test.go
+++ b/modules/git/repo_tag_test.go
@@ -16,6 +16,7 @@ func TestRepository_GetTags(t *testing.T) {
 	bareRepo1Path := filepath.Join(testReposDir, "repo1_bare")
 	bareRepo1, err := OpenRepository(bareRepo1Path)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	tags, err := bareRepo1.GetTagInfos()
 	assert.NoError(t, err)
@@ -34,6 +35,7 @@ func TestRepository_GetTag(t *testing.T) {
 
 	bareRepo1, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	lTagCommitID := "6fbd69e9823458e6c4a2fc5c0f6bc022b2f2acd1"
 	lTagName := "lightweightTag"
@@ -83,6 +85,7 @@ func TestRepository_GetAnnotatedTag(t *testing.T) {
 
 	bareRepo1, err := OpenRepository(clonedPath)
 	assert.NoError(t, err)
+	defer bareRepo1.Close()
 
 	lTagCommitID := "6fbd69e9823458e6c4a2fc5c0f6bc022b2f2acd1"
 	lTagName := "lightweightTag"
diff --git a/modules/git/repo_test.go b/modules/git/repo_test.go
index 15f5e3781c..0b6986764c 100644
--- a/modules/git/repo_test.go
+++ b/modules/git/repo_test.go
@@ -30,6 +30,7 @@ func TestRepoIsEmpty(t *testing.T) {
 	emptyRepo2Path := filepath.Join(testReposDir, "repo2_empty")
 	repo, err := OpenRepository(emptyRepo2Path)
 	assert.NoError(t, err)
+	defer repo.Close()
 	isEmpty, err := repo.IsEmpty()
 	assert.NoError(t, err)
 	assert.True(t, isEmpty)
diff --git a/modules/git/tree_entry_test.go b/modules/git/tree_entry_test.go
index c65a691ecf..e872900370 100644
--- a/modules/git/tree_entry_test.go
+++ b/modules/git/tree_entry_test.go
@@ -56,6 +56,7 @@ func TestEntriesCustomSort(t *testing.T) {
 func TestFollowLink(t *testing.T) {
 	r, err := OpenRepository("tests/repos/repo1_bare")
 	assert.NoError(t, err)
+	defer r.Close()
 
 	commit, err := r.GetCommit("37991dec2c8e592043f47155ce4808d4580f9123")
 	assert.NoError(t, err)
diff --git a/modules/migrations/base/uploader.go b/modules/migrations/base/uploader.go
index a3a9c9fac6..ae1be84b88 100644
--- a/modules/migrations/base/uploader.go
+++ b/modules/migrations/base/uploader.go
@@ -17,4 +17,5 @@ type Uploader interface {
 	CreateComments(comments ...*Comment) error
 	CreatePullRequests(prs ...*PullRequest) error
 	Rollback() error
+	Close()
 }
diff --git a/modules/migrations/gitea.go b/modules/migrations/gitea.go
index 676667b426..81a6116a23 100644
--- a/modules/migrations/gitea.go
+++ b/modules/migrations/gitea.go
@@ -131,6 +131,13 @@ func (g *GiteaLocalUploader) CreateRepo(repo *base.Repository, opts base.Migrate
 	return err
 }
 
+// Close closes this uploader
+func (g *GiteaLocalUploader) Close() {
+	if g.gitRepo != nil {
+		g.gitRepo.Close()
+	}
+}
+
 // CreateTopics creates topics
 func (g *GiteaLocalUploader) CreateTopics(topics ...string) error {
 	return models.SaveTopics(g.repo.ID, topics...)
diff --git a/modules/migrations/migrate.go b/modules/migrations/migrate.go
index bbc1dc2d56..7a5071e125 100644
--- a/modules/migrations/migrate.go
+++ b/modules/migrations/migrate.go
@@ -94,6 +94,7 @@ func migrateRepository(downloader base.Downloader, uploader base.Uploader, opts
 	if err := uploader.CreateRepo(repo, opts); err != nil {
 		return err
 	}
+	defer uploader.Close()
 
 	log.Trace("migrating topics")
 	topics, err := downloader.GetTopics()
diff --git a/modules/repofiles/action.go b/modules/repofiles/action.go
index 9467e4fb72..755c015ca9 100644
--- a/modules/repofiles/action.go
+++ b/modules/repofiles/action.go
@@ -53,9 +53,11 @@ func CommitRepoAction(opts CommitRepoActionOptions) error {
 			}
 			if err := gitRepo.SetDefaultBranch(repo.DefaultBranch); err != nil {
 				if !git.IsErrUnsupportedVersion(err) {
+					gitRepo.Close()
 					return err
 				}
 			}
+			gitRepo.Close()
 		}
 	}
 
@@ -132,8 +134,10 @@ func CommitRepoAction(opts CommitRepoActionOptions) error {
 
 			shaSum, err = gitRepo.GetBranchCommitID(refName)
 			if err != nil {
+				gitRepo.Close()
 				log.Error("GetBranchCommitID[%s]: %v", opts.RefFullName, err)
 			}
+			gitRepo.Close()
 			if err = models.PrepareWebhooks(repo, models.HookEventCreate, &api.CreatePayload{
 				Ref:     refName,
 				Sha:     shaSum,
@@ -167,8 +171,10 @@ func CommitRepoAction(opts CommitRepoActionOptions) error {
 		}
 		shaSum, err = gitRepo.GetTagCommitID(refName)
 		if err != nil {
+			gitRepo.Close()
 			log.Error("GetTagCommitID[%s]: %v", opts.RefFullName, err)
 		}
+		gitRepo.Close()
 		if err = models.PrepareWebhooks(repo, models.HookEventCreate, &api.CreatePayload{
 			Ref:     refName,
 			Sha:     shaSum,
diff --git a/modules/repofiles/blob.go b/modules/repofiles/blob.go
index e9d85a0dcf..60a05e280e 100644
--- a/modules/repofiles/blob.go
+++ b/modules/repofiles/blob.go
@@ -17,6 +17,7 @@ func GetBlobBySHA(repo *models.Repository, sha string) (*api.GitBlobResponse, er
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 	gitBlob, err := gitRepo.GetBlob(sha)
 	if err != nil {
 		return nil, err
diff --git a/modules/repofiles/blob_test.go b/modules/repofiles/blob_test.go
index 1dc183a8af..ddc23aeac3 100644
--- a/modules/repofiles/blob_test.go
+++ b/modules/repofiles/blob_test.go
@@ -21,6 +21,8 @@ func TestGetBlobBySHA(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	sha := "65f1bf27bc3bf70f64657658635e66094edbcb4d"
 	ctx.SetParams(":id", "1")
 	ctx.SetParams(":sha", sha)
diff --git a/modules/repofiles/commit_status.go b/modules/repofiles/commit_status.go
index f3dfbf209f..3d93c58d85 100644
--- a/modules/repofiles/commit_status.go
+++ b/modules/repofiles/commit_status.go
@@ -23,8 +23,10 @@ func CreateCommitStatus(repo *models.Repository, creator *models.User, sha strin
 		return fmt.Errorf("OpenRepository[%s]: %v", repoPath, err)
 	}
 	if _, err := gitRepo.GetCommit(sha); err != nil {
+		gitRepo.Close()
 		return fmt.Errorf("GetCommit[%s]: %v", sha, err)
 	}
+	gitRepo.Close()
 
 	if err := models.NewCommitStatus(models.NewCommitStatusOptions{
 		Repo:         repo,
diff --git a/modules/repofiles/content.go b/modules/repofiles/content.go
index d7d43ef9d1..aed98c33a8 100644
--- a/modules/repofiles/content.go
+++ b/modules/repofiles/content.go
@@ -59,6 +59,7 @@ func GetContentsOrList(repo *models.Repository, treePath, ref string) (interface
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	// Get the commit object for the ref
 	commit, err := gitRepo.GetCommit(ref)
@@ -117,6 +118,7 @@ func GetContents(repo *models.Repository, treePath, ref string, forList bool) (*
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	// Get the commit object for the ref
 	commit, err := gitRepo.GetCommit(ref)
diff --git a/modules/repofiles/content_test.go b/modules/repofiles/content_test.go
index cd98c54ea6..d024cfd549 100644
--- a/modules/repofiles/content_test.go
+++ b/modules/repofiles/content_test.go
@@ -56,6 +56,8 @@ func TestGetContents(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	treePath := "README.md"
 	ref := ctx.Repo.Repository.DefaultBranch
 
@@ -82,6 +84,8 @@ func TestGetContentsOrListForDir(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	treePath := "" // root dir
 	ref := ctx.Repo.Repository.DefaultBranch
 
@@ -115,6 +119,8 @@ func TestGetContentsOrListForFile(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	treePath := "README.md"
 	ref := ctx.Repo.Repository.DefaultBranch
 
@@ -141,6 +147,8 @@ func TestGetContentsErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	treePath := "README.md"
 	ref := repo.DefaultBranch
@@ -170,6 +178,8 @@ func TestGetContentsOrListErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	treePath := "README.md"
 	ref := repo.DefaultBranch
@@ -198,6 +208,8 @@ func TestGetContentsOrListOfEmptyRepos(t *testing.T) {
 	test.LoadRepo(t, ctx, 15)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 
 	t.Run("empty repo", func(t *testing.T) {
diff --git a/modules/repofiles/diff_test.go b/modules/repofiles/diff_test.go
index de5ed1d754..db2c7552c4 100644
--- a/modules/repofiles/diff_test.go
+++ b/modules/repofiles/diff_test.go
@@ -22,6 +22,8 @@ func TestGetDiffPreview(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	branch := ctx.Repo.Repository.DefaultBranch
 	treePath := "README.md"
 	content := "# repo1\n\nDescription for repo1\nthis is a new line"
@@ -119,6 +121,8 @@ func TestGetDiffPreviewErrors(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	branch := ctx.Repo.Repository.DefaultBranch
 	treePath := "README.md"
 	content := "# repo1\n\nDescription for repo1\nthis is a new line"
diff --git a/modules/repofiles/file_test.go b/modules/repofiles/file_test.go
index 7c45139dd9..46b5a6c549 100644
--- a/modules/repofiles/file_test.go
+++ b/modules/repofiles/file_test.go
@@ -88,10 +88,13 @@ func TestGetFileResponseFromCommit(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	branch := repo.DefaultBranch
 	treePath := "README.md"
 	gitRepo, _ := git.OpenRepository(repo.RepoPath())
+	defer gitRepo.Close()
 	commit, _ := gitRepo.GetBranchCommit(branch)
 	expectedFileResponse := getExpectedFileResponse()
 
diff --git a/modules/repofiles/temp_repo.go b/modules/repofiles/temp_repo.go
index 4a50e64192..ae4d905946 100644
--- a/modules/repofiles/temp_repo.go
+++ b/modules/repofiles/temp_repo.go
@@ -44,6 +44,7 @@ func NewTemporaryUploadRepository(repo *models.Repository) (*TemporaryUploadRepo
 
 // Close the repository cleaning up all files
 func (t *TemporaryUploadRepository) Close() {
+	defer t.gitRepo.Close()
 	if err := models.RemoveTemporaryPath(t.basePath); err != nil {
 		log.Error("Failed to remove temporary path %s: %v", t.basePath, err)
 	}
diff --git a/modules/repofiles/tree.go b/modules/repofiles/tree.go
index 318a5d152d..cf0534563f 100644
--- a/modules/repofiles/tree.go
+++ b/modules/repofiles/tree.go
@@ -19,6 +19,7 @@ func GetTreeBySHA(repo *models.Repository, sha string, page, perPage int, recurs
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 	gitTree, err := gitRepo.GetTree(sha)
 	if err != nil || gitTree == nil {
 		return nil, models.ErrSHANotFound{
diff --git a/modules/repofiles/tree_test.go b/modules/repofiles/tree_test.go
index ecff8b9071..e1bb812ec1 100644
--- a/modules/repofiles/tree_test.go
+++ b/modules/repofiles/tree_test.go
@@ -21,6 +21,8 @@ func TestGetTreeBySHA(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	sha := ctx.Repo.Repository.DefaultBranch
 	page := 1
 	perPage := 10
diff --git a/modules/repofiles/update.go b/modules/repofiles/update.go
index 1a1fe6c389..19dcc87e29 100644
--- a/modules/repofiles/update.go
+++ b/modules/repofiles/update.go
@@ -429,6 +429,7 @@ func PushUpdate(repo *models.Repository, branch string, opts models.PushUpdateOp
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	if err = repo.UpdateSize(); err != nil {
 		log.Error("Failed to update size for repository: %v", err)
diff --git a/modules/test/context_tests.go b/modules/test/context_tests.go
index 92df1c5762..cf9c5fbc54 100644
--- a/modules/test/context_tests.go
+++ b/modules/test/context_tests.go
@@ -55,6 +55,7 @@ func LoadRepo(t *testing.T, ctx *context.Context, repoID int64) {
 func LoadRepoCommit(t *testing.T, ctx *context.Context) {
 	gitRepo, err := git.OpenRepository(ctx.Repo.Repository.RepoPath())
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 	branch, err := gitRepo.GetHEADBranch()
 	assert.NoError(t, err)
 	ctx.Repo.Commit, err = gitRepo.GetBranchCommit(branch.Name)
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 04ff91fbbf..10b827253d 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -638,7 +638,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 				}, reqRepoReader(models.UnitTypeCode))
 				m.Group("/tags", func() {
 					m.Get("", repo.ListTags)
-				}, reqRepoReader(models.UnitTypeCode))
+				}, reqRepoReader(models.UnitTypeCode), context.ReferencesGitRepo(true))
 				m.Group("/keys", func() {
 					m.Combo("").Get(repo.ListDeployKeys).
 						Post(bind(api.CreateKeyOption{}), repo.CreateDeployKey)
diff --git a/routers/api/v1/repo/commits.go b/routers/api/v1/repo/commits.go
index 0156aaaa05..163a06a95e 100644
--- a/routers/api/v1/repo/commits.go
+++ b/routers/api/v1/repo/commits.go
@@ -51,6 +51,7 @@ func GetSingleCommit(ctx *context.APIContext) {
 		ctx.ServerError("OpenRepository", err)
 		return
 	}
+	defer gitRepo.Close()
 	commit, err := gitRepo.GetCommit(ctx.Params(":sha"))
 	if err != nil {
 		ctx.NotFoundOrServerError("GetCommit", git.IsErrNotExist, err)
@@ -113,6 +114,7 @@ func GetAllCommits(ctx *context.APIContext) {
 		ctx.ServerError("OpenRepository", err)
 		return
 	}
+	defer gitRepo.Close()
 
 	page := ctx.QueryInt("page")
 	if page <= 0 {
diff --git a/routers/api/v1/repo/file.go b/routers/api/v1/repo/file.go
index ae20e1e96b..f23e7bca9e 100644
--- a/routers/api/v1/repo/file.go
+++ b/routers/api/v1/repo/file.go
@@ -95,6 +95,7 @@ func GetArchive(ctx *context.APIContext) {
 		return
 	}
 	ctx.Repo.GitRepo = gitRepo
+	defer gitRepo.Close()
 
 	repo.Download(ctx.Context)
 }
diff --git a/routers/api/v1/repo/git_ref.go b/routers/api/v1/repo/git_ref.go
index d7acc139f0..c2bcbb3603 100644
--- a/routers/api/v1/repo/git_ref.go
+++ b/routers/api/v1/repo/git_ref.go
@@ -76,6 +76,8 @@ func getGitRefs(ctx *context.APIContext, filter string) ([]*git.Reference, strin
 	if err != nil {
 		return nil, "OpenRepository", err
 	}
+	defer gitRepo.Close()
+
 	if len(filter) > 0 {
 		filter = "refs/" + filter
 	}
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index 4d6a84d8f8..2601ab8339 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -194,6 +194,7 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 	if ctx.Written() {
 		return
 	}
+	defer headGitRepo.Close()
 
 	// Check if another PR exists with the same targets
 	existingPr, err := models.GetUnmergedPullRequest(headRepo.ID, ctx.Repo.Repository.ID, headBranch, baseBranch)
@@ -687,6 +688,7 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 	// user should have permission to read baseRepo's codes and pulls, NOT headRepo's
 	permBase, err := models.GetUserRepoPermission(baseRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -697,6 +699,7 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 				baseRepo,
 				permBase)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("Can't read pulls or can't read UnitTypeCode")
 		return nil, nil, nil, nil, "", ""
 	}
@@ -704,6 +707,7 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 	// user should have permission to read headrepo's codes
 	permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -714,18 +718,21 @@ func parseCompareInfo(ctx *context.APIContext, form api.CreatePullRequestOption)
 				headRepo,
 				permHead)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("Can't read headRepo UnitTypeCode")
 		return nil, nil, nil, nil, "", ""
 	}
 
 	// Check if head branch is valid.
 	if !headGitRepo.IsBranchExist(headBranch) {
+		headGitRepo.Close()
 		ctx.NotFound()
 		return nil, nil, nil, nil, "", ""
 	}
 
 	compareInfo, err := headGitRepo.GetCompareInfo(models.RepoPath(baseRepo.Owner.Name, baseRepo.Name), baseBranch, headBranch)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.Error(500, "GetCompareInfo", err)
 		return nil, nil, nil, nil, "", ""
 	}
diff --git a/routers/api/v1/repo/tag.go b/routers/api/v1/repo/tag.go
index a802048285..12bac854ec 100644
--- a/routers/api/v1/repo/tag.go
+++ b/routers/api/v1/repo/tag.go
@@ -33,7 +33,7 @@ func ListTags(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/TagList"
-	tags, err := ctx.Repo.Repository.GetTags()
+	tags, err := ctx.Repo.GitRepo.GetTagInfos()
 	if err != nil {
 		ctx.Error(500, "GetTags", err)
 		return
diff --git a/routers/repo/compare.go b/routers/repo/compare.go
index f8534f68b7..2b66d3818d 100644
--- a/routers/repo/compare.go
+++ b/routers/repo/compare.go
@@ -157,6 +157,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 	// user should have permission to read baseRepo's codes and pulls, NOT headRepo's
 	permBase, err := models.GetUserRepoPermission(baseRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -167,6 +168,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				baseRepo,
 				permBase)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -174,6 +176,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 	// user should have permission to read headrepo's codes
 	permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -184,6 +187,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				headRepo,
 				permHead)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -199,6 +203,7 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 			ctx.Data["HeadBranch"] = headBranch
 			headIsCommit = true
 		} else {
+			headGitRepo.Close()
 			ctx.NotFound("IsRefExist", nil)
 			return nil, nil, nil, nil, "", ""
 		}
@@ -219,12 +224,14 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				baseRepo,
 				permBase)
 		}
+		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
 
 	compareInfo, err := headGitRepo.GetCompareInfo(models.RepoPath(baseRepo.Owner.Name, baseRepo.Name), baseBranch, headBranch)
 	if err != nil {
+		headGitRepo.Close()
 		ctx.ServerError("GetCompareInfo", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -345,6 +352,7 @@ func CompareDiff(ctx *context.Context) {
 	if ctx.Written() {
 		return
 	}
+	defer headGitRepo.Close()
 
 	nothingToCompare := PrepareCompareDiff(ctx, headUser, headRepo, headGitRepo, compareInfo, baseBranch, headBranch)
 	if ctx.Written() {
diff --git a/routers/repo/editor_test.go b/routers/repo/editor_test.go
index ca00be74b7..ec7aee1e77 100644
--- a/routers/repo/editor_test.go
+++ b/routers/repo/editor_test.go
@@ -48,6 +48,8 @@ func TestGetUniquePatchBranchName(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	expectedBranchName := "user2-patch-1"
 	branchName := GetUniquePatchBranchName(ctx)
 	assert.Equal(t, expectedBranchName, branchName)
@@ -61,9 +63,12 @@ func TestGetClosestParentWithFiles(t *testing.T) {
 	test.LoadRepoCommit(t, ctx)
 	test.LoadUser(t, ctx, 2)
 	test.LoadGitRepo(t, ctx)
+	defer ctx.Repo.GitRepo.Close()
+
 	repo := ctx.Repo.Repository
 	branch := repo.DefaultBranch
 	gitRepo, _ := git.OpenRepository(repo.RepoPath())
+	defer gitRepo.Close()
 	commit, _ := gitRepo.GetBranchCommit(branch)
 	expectedTreePath := ""
 
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index 23d1718cf2..33bf1b2ed9 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -337,6 +337,7 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
 			ctx.ServerError("OpenRepository", err)
 			return nil
 		}
+		defer headGitRepo.Close()
 
 		headBranchExist = headGitRepo.IsBranchExist(pull.HeadBranch)
 
@@ -519,6 +520,7 @@ func ViewPullFiles(ctx *context.Context) {
 			ctx.ServerError("OpenRepository", err)
 			return
 		}
+		defer headGitRepo.Close()
 
 		headCommitID, err := headGitRepo.GetBranchCommitID(pull.HeadBranch)
 		if err != nil {
@@ -704,6 +706,7 @@ func CompareAndPullRequestPost(ctx *context.Context, form auth.CreateIssueForm)
 	if ctx.Written() {
 		return
 	}
+	defer headGitRepo.Close()
 
 	labelIDs, assigneeIDs, milestoneID := ValidateRepoMetas(ctx, form, true)
 	if ctx.Written() {
@@ -870,12 +873,14 @@ func CleanUpPullRequest(ctx *context.Context) {
 		ctx.ServerError(fmt.Sprintf("OpenRepository[%s]", pr.HeadRepo.RepoPath()), err)
 		return
 	}
+	defer gitRepo.Close()
 
 	gitBaseRepo, err := git.OpenRepository(pr.BaseRepo.RepoPath())
 	if err != nil {
 		ctx.ServerError(fmt.Sprintf("OpenRepository[%s]", pr.BaseRepo.RepoPath()), err)
 		return
 	}
+	defer gitBaseRepo.Close()
 
 	defer func() {
 		ctx.JSON(200, map[string]interface{}{
@@ -1004,6 +1009,7 @@ func DownloadPullPatch(ctx *context.Context) {
 		ctx.ServerError("OpenRepository", err)
 		return
 	}
+	defer headGitRepo.Close()
 
 	patch, err := headGitRepo.GetFormatPatch(pr.MergeBase, pr.HeadBranch)
 	if err != nil {
diff --git a/routers/repo/release_test.go b/routers/repo/release_test.go
index 524c1c7346..47d1a89b54 100644
--- a/routers/repo/release_test.go
+++ b/routers/repo/release_test.go
@@ -57,5 +57,6 @@ func TestNewReleasePost(t *testing.T) {
 			Title:       testCase.Form.Title,
 			Note:        testCase.Form.Content,
 		}, models.Cond("is_draft=?", len(testCase.Form.Draft) > 0))
+		ctx.Repo.GitRepo.Close()
 	}
 }
diff --git a/routers/repo/setting.go b/routers/repo/setting.go
index c74b273420..eb4f27e64b 100644
--- a/routers/repo/setting.go
+++ b/routers/repo/setting.go
@@ -71,6 +71,11 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 		// Check if repository name has been changed.
 		if repo.LowerName != strings.ToLower(newRepoName) {
 			isNameChanged = true
+			// Close the GitRepo if open
+			if ctx.Repo.GitRepo != nil {
+				ctx.Repo.GitRepo.Close()
+				ctx.Repo.GitRepo = nil
+			}
 			if err := models.ChangeRepositoryName(ctx.Repo.Owner, repo.Name, newRepoName); err != nil {
 				ctx.Data["Err_RepoName"] = true
 				switch {
@@ -378,6 +383,11 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 		}
 
 		oldOwnerID := ctx.Repo.Owner.ID
+		// Close the GitRepo if open
+		if ctx.Repo.GitRepo != nil {
+			ctx.Repo.GitRepo.Close()
+			ctx.Repo.GitRepo = nil
+		}
 		if err = models.TransferOwnership(ctx.User, newOwner, repo); err != nil {
 			if models.IsErrRepoAlreadyExist(err) {
 				ctx.RenderWithErr(ctx.Tr("repo.settings.new_owner_has_same_repo"), tplSettingsOptions, nil)
diff --git a/routers/repo/wiki.go b/routers/repo/wiki.go
index 02fbe4a1dd..6cf1943658 100644
--- a/routers/repo/wiki.go
+++ b/routers/repo/wiki.go
@@ -146,6 +146,9 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 	// Get page list.
 	entries, err := commit.ListEntries()
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		ctx.ServerError("ListEntries", err)
 		return nil, nil
 	}
@@ -159,6 +162,9 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 			if models.IsErrWikiInvalidFileName(err) {
 				continue
 			}
+			if wikiRepo != nil {
+				wikiRepo.Close()
+			}
 			ctx.ServerError("WikiFilenameToName", err)
 			return nil, nil
 		} else if wikiName == "_Sidebar" || wikiName == "_Footer" {
@@ -188,16 +194,25 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 		ctx.Redirect(ctx.Repo.RepoLink + "/wiki/_pages")
 	}
 	if entry == nil || ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
 	sidebarContent, _, _, _ := wikiContentsByName(ctx, commit, "_Sidebar")
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
 	footerContent, _, _, _ := wikiContentsByName(ctx, commit, "_Footer")
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
@@ -218,6 +233,9 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
 	wikiRepo, commit, err := findWikiRepoCommit(ctx)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		if !git.IsErrNotExist(err) {
 			ctx.ServerError("GetBranchCommit", err)
 		}
@@ -241,6 +259,9 @@ func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry)
 		ctx.Redirect(ctx.Repo.RepoLink + "/wiki/_pages")
 	}
 	if entry == nil || ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return nil, nil
 	}
 
@@ -263,6 +284,9 @@ func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry)
 	// get Commit Count
 	commitsHistory, err := wikiRepo.CommitsByFileAndRangeNoFollow("master", pageFilename, page)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		ctx.ServerError("CommitsByFileAndRangeNoFollow", err)
 		return nil, nil
 	}
@@ -279,13 +303,21 @@ func renderRevisionPage(ctx *context.Context) (*git.Repository, *git.TreeEntry)
 }
 
 func renderEditPage(ctx *context.Context) {
-	_, commit, err := findWikiRepoCommit(ctx)
+	wikiRepo, commit, err := findWikiRepoCommit(ctx)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		if !git.IsErrNotExist(err) {
 			ctx.ServerError("GetBranchCommit", err)
 		}
 		return
 	}
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 
 	// get requested pagename
 	pageName := models.NormalizeWikiName(ctx.Params(":page"))
@@ -327,8 +359,16 @@ func Wiki(ctx *context.Context) {
 
 	wikiRepo, entry := renderViewPage(ctx)
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return
 	}
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 	if entry == nil {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
 		ctx.HTML(200, tplWikiStart)
@@ -364,8 +404,16 @@ func WikiRevision(ctx *context.Context) {
 
 	wikiRepo, entry := renderRevisionPage(ctx)
 	if ctx.Written() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return
 	}
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 	if entry == nil {
 		ctx.Data["Title"] = ctx.Tr("repo.wiki")
 		ctx.HTML(200, tplWikiStart)
@@ -397,11 +445,18 @@ func WikiPages(ctx *context.Context) {
 
 	wikiRepo, commit, err := findWikiRepoCommit(ctx)
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
 		return
 	}
 
 	entries, err := commit.ListEntries()
 	if err != nil {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+
 		ctx.ServerError("ListEntries", err)
 		return
 	}
@@ -412,6 +467,10 @@ func WikiPages(ctx *context.Context) {
 		}
 		c, err := wikiRepo.GetCommitByPath(entry.Name())
 		if err != nil {
+			if wikiRepo != nil {
+				wikiRepo.Close()
+			}
+
 			ctx.ServerError("GetCommit", err)
 			return
 		}
@@ -420,6 +479,10 @@ func WikiPages(ctx *context.Context) {
 			if models.IsErrWikiInvalidFileName(err) {
 				continue
 			}
+			if wikiRepo != nil {
+				wikiRepo.Close()
+			}
+
 			ctx.ServerError("WikiFilenameToName", err)
 			return
 		}
@@ -431,6 +494,11 @@ func WikiPages(ctx *context.Context) {
 	}
 	ctx.Data["Pages"] = pages
 
+	defer func() {
+		if wikiRepo != nil {
+			wikiRepo.Close()
+		}
+	}()
 	ctx.HTML(200, tplWikiPages)
 }
 
diff --git a/routers/repo/wiki_test.go b/routers/repo/wiki_test.go
index 4687d24f6b..44fcd02035 100644
--- a/routers/repo/wiki_test.go
+++ b/routers/repo/wiki_test.go
@@ -23,6 +23,7 @@ const message = "Wiki commit message for unit tests"
 func wikiEntry(t *testing.T, repo *models.Repository, wikiName string) *git.TreeEntry {
 	wikiRepo, err := git.OpenRepository(repo.WikiPath())
 	assert.NoError(t, err)
+	defer wikiRepo.Close()
 	commit, err := wikiRepo.GetBranchCommit("master")
 	assert.NoError(t, err)
 	entries, err := commit.ListEntries()
diff --git a/services/comments/comments.go b/services/comments/comments.go
index e8448e9065..406cd79ce6 100644
--- a/services/comments/comments.go
+++ b/services/comments/comments.go
@@ -60,6 +60,7 @@ func CreateCodeComment(doer *models.User, repo *models.Repository, issue *models
 	if err != nil {
 		return nil, fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer gitRepo.Close()
 
 	// FIXME validate treePath
 	// Get latest commit referencing the commented line
diff --git a/services/gitdiff/gitdiff.go b/services/gitdiff/gitdiff.go
index c2c5675d9f..9c2aef5c97 100644
--- a/services/gitdiff/gitdiff.go
+++ b/services/gitdiff/gitdiff.go
@@ -678,6 +678,7 @@ func GetDiffRangeWithWhitespaceBehavior(repoPath, beforeCommitID, afterCommitID
 	if err != nil {
 		return nil, err
 	}
+	defer gitRepo.Close()
 
 	commit, err := gitRepo.GetCommit(afterCommitID)
 	if err != nil {
@@ -750,6 +751,7 @@ func GetRawDiffForFile(repoPath, startCommit, endCommit string, diffType RawDiff
 	if err != nil {
 		return fmt.Errorf("OpenRepository: %v", err)
 	}
+	defer repo.Close()
 
 	commit, err := repo.GetCommit(endCommit)
 	if err != nil {
diff --git a/services/mirror/mirror.go b/services/mirror/mirror.go
index 7bfc5fd4da..a5e956f3d3 100644
--- a/services/mirror/mirror.go
+++ b/services/mirror/mirror.go
@@ -197,8 +197,10 @@ func runSync(m *models.Mirror) ([]*mirrorSyncResult, bool) {
 		return nil, false
 	}
 	if err = models.SyncReleasesWithTags(m.Repo, gitRepo); err != nil {
+		gitRepo.Close()
 		log.Error("Failed to synchronize tags to releases for repository: %v", err)
 	}
+	gitRepo.Close()
 
 	if err := m.Repo.UpdateSize(); err != nil {
 		log.Error("Failed to update size for mirror repository: %v", err)
@@ -290,97 +292,103 @@ func Update() {
 func SyncMirrors() {
 	// Start listening on new sync requests.
 	for repoID := range mirrorQueue.Queue() {
-		log.Trace("SyncMirrors [repo_id: %v]", repoID)
-		mirrorQueue.Remove(repoID)
+		syncMirror(repoID)
+	}
+}
+
+func syncMirror(repoID string) {
+	log.Trace("SyncMirrors [repo_id: %v]", repoID)
+	mirrorQueue.Remove(repoID)
+
+	m, err := models.GetMirrorByRepoID(com.StrTo(repoID).MustInt64())
+	if err != nil {
+		log.Error("GetMirrorByRepoID [%s]: %v", repoID, err)
+		return
+
+	}
+
+	results, ok := runSync(m)
+	if !ok {
+		return
+	}
+
+	m.ScheduleNextUpdate()
+	if err = models.UpdateMirror(m); err != nil {
+		log.Error("UpdateMirror [%s]: %v", repoID, err)
+		return
+	}
 
-		m, err := models.GetMirrorByRepoID(com.StrTo(repoID).MustInt64())
+	var gitRepo *git.Repository
+	if len(results) == 0 {
+		log.Trace("SyncMirrors [repo_id: %d]: no commits fetched", m.RepoID)
+	} else {
+		gitRepo, err = git.OpenRepository(m.Repo.RepoPath())
 		if err != nil {
-			log.Error("GetMirrorByRepoID [%s]: %v", repoID, err)
-			continue
+			log.Error("OpenRepository [%d]: %v", m.RepoID, err)
+			return
 		}
+		defer gitRepo.Close()
+	}
 
-		results, ok := runSync(m)
-		if !ok {
+	for _, result := range results {
+		// Discard GitHub pull requests, i.e. refs/pull/*
+		if strings.HasPrefix(result.refName, "refs/pull/") {
 			continue
 		}
 
-		m.ScheduleNextUpdate()
-		if err = models.UpdateMirror(m); err != nil {
-			log.Error("UpdateMirror [%s]: %v", repoID, err)
+		// Create reference
+		if result.oldCommitID == gitShortEmptySha {
+			if err = models.MirrorSyncCreateAction(m.Repo, result.refName); err != nil {
+				log.Error("MirrorSyncCreateAction [repo_id: %d]: %v", m.RepoID, err)
+			}
 			continue
 		}
 
-		var gitRepo *git.Repository
-		if len(results) == 0 {
-			log.Trace("SyncMirrors [repo_id: %d]: no commits fetched", m.RepoID)
-		} else {
-			gitRepo, err = git.OpenRepository(m.Repo.RepoPath())
-			if err != nil {
-				log.Error("OpenRepository [%d]: %v", m.RepoID, err)
-				continue
+		// Delete reference
+		if result.newCommitID == gitShortEmptySha {
+			if err = models.MirrorSyncDeleteAction(m.Repo, result.refName); err != nil {
+				log.Error("MirrorSyncDeleteAction [repo_id: %d]: %v", m.RepoID, err)
 			}
+			continue
 		}
 
-		for _, result := range results {
-			// Discard GitHub pull requests, i.e. refs/pull/*
-			if strings.HasPrefix(result.refName, "refs/pull/") {
-				continue
-			}
-
-			// Create reference
-			if result.oldCommitID == gitShortEmptySha {
-				if err = models.MirrorSyncCreateAction(m.Repo, result.refName); err != nil {
-					log.Error("MirrorSyncCreateAction [repo_id: %d]: %v", m.RepoID, err)
-				}
-				continue
-			}
-
-			// Delete reference
-			if result.newCommitID == gitShortEmptySha {
-				if err = models.MirrorSyncDeleteAction(m.Repo, result.refName); err != nil {
-					log.Error("MirrorSyncDeleteAction [repo_id: %d]: %v", m.RepoID, err)
-				}
-				continue
-			}
-
-			// Push commits
-			oldCommitID, err := git.GetFullCommitID(gitRepo.Path, result.oldCommitID)
-			if err != nil {
-				log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
-				continue
-			}
-			newCommitID, err := git.GetFullCommitID(gitRepo.Path, result.newCommitID)
-			if err != nil {
-				log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
-				continue
-			}
-			commits, err := gitRepo.CommitsBetweenIDs(newCommitID, oldCommitID)
-			if err != nil {
-				log.Error("CommitsBetweenIDs [repo_id: %d, new_commit_id: %s, old_commit_id: %s]: %v", m.RepoID, newCommitID, oldCommitID, err)
-				continue
-			}
-			if err = models.MirrorSyncPushAction(m.Repo, models.MirrorSyncPushActionOptions{
-				RefName:     result.refName,
-				OldCommitID: oldCommitID,
-				NewCommitID: newCommitID,
-				Commits:     models.ListToPushCommits(commits),
-			}); err != nil {
-				log.Error("MirrorSyncPushAction [repo_id: %d]: %v", m.RepoID, err)
-				continue
-			}
+		// Push commits
+		oldCommitID, err := git.GetFullCommitID(gitRepo.Path, result.oldCommitID)
+		if err != nil {
+			log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
+			continue
 		}
-
-		// Get latest commit date and update to current repository updated time
-		commitDate, err := git.GetLatestCommitTime(m.Repo.RepoPath())
+		newCommitID, err := git.GetFullCommitID(gitRepo.Path, result.newCommitID)
 		if err != nil {
-			log.Error("GetLatestCommitDate [%d]: %v", m.RepoID, err)
+			log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
 			continue
 		}
-
-		if err = models.UpdateRepositoryUpdatedTime(m.RepoID, commitDate); err != nil {
-			log.Error("Update repository 'updated_unix' [%d]: %v", m.RepoID, err)
+		commits, err := gitRepo.CommitsBetweenIDs(newCommitID, oldCommitID)
+		if err != nil {
+			log.Error("CommitsBetweenIDs [repo_id: %d, new_commit_id: %s, old_commit_id: %s]: %v", m.RepoID, newCommitID, oldCommitID, err)
 			continue
 		}
+		if err = models.MirrorSyncPushAction(m.Repo, models.MirrorSyncPushActionOptions{
+			RefName:     result.refName,
+			OldCommitID: oldCommitID,
+			NewCommitID: newCommitID,
+			Commits:     models.ListToPushCommits(commits),
+		}); err != nil {
+			log.Error("MirrorSyncPushAction [repo_id: %d]: %v", m.RepoID, err)
+			continue
+		}
+	}
+
+	// Get latest commit date and update to current repository updated time
+	commitDate, err := git.GetLatestCommitTime(m.Repo.RepoPath())
+	if err != nil {
+		log.Error("GetLatestCommitDate [%d]: %v", m.RepoID, err)
+		return
+	}
+
+	if err = models.UpdateRepositoryUpdatedTime(m.RepoID, commitDate); err != nil {
+		log.Error("Update repository 'updated_unix' [%d]: %v", m.RepoID, err)
+		return
 	}
 }
 
diff --git a/services/mirror/mirror_test.go b/services/mirror/mirror_test.go
index 9ad11b7265..37e8a7be57 100644
--- a/services/mirror/mirror_test.go
+++ b/services/mirror/mirror_test.go
@@ -51,6 +51,7 @@ func TestRelease_MirrorDelete(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	findOptions := models.FindReleasesOptions{IncludeDrafts: true, IncludeTags: true}
 	initCount, err := models.GetReleaseCountByRepoID(mirror.ID, findOptions)
diff --git a/services/pull/commit_status.go b/services/pull/commit_status.go
index 2872db7bd2..ca00cdaad9 100644
--- a/services/pull/commit_status.go
+++ b/services/pull/commit_status.go
@@ -55,6 +55,7 @@ func IsPullCommitStatusPass(pr *models.PullRequest) (bool, error) {
 	if err != nil {
 		return false, errors.Wrap(err, "OpenRepository")
 	}
+	defer headGitRepo.Close()
 
 	if !headGitRepo.IsBranchExist(pr.HeadBranch) {
 		return false, errors.New("Head branch does not exist, can not merge")
diff --git a/services/release/release_test.go b/services/release/release_test.go
index d30dfee286..effab21251 100644
--- a/services/release/release_test.go
+++ b/services/release/release_test.go
@@ -27,6 +27,7 @@ func TestRelease_Create(t *testing.T) {
 
 	gitRepo, err := git.OpenRepository(repoPath)
 	assert.NoError(t, err)
+	defer gitRepo.Close()
 
 	assert.NoError(t, CreateRelease(gitRepo, &models.Release{
 		RepoID:       repo.ID,