Add latest commit's SHA to content response (#20398)

* Add latest commit's SHA to content response

- When requesting the contents of a filepath, add the latest commit's
SHA to the requested file.
- Resolves #12840

* Add swagger

* Fix NPE

* Fix tests

* Hook into LastCommitCache

* Move AddLastCommitCache to a common nogogit and gogit file

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Prevent NPE

Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

integrations/api_repo_file_create_test.go

@@ -50,7 +50,7 @@ func getCreateFileOptions() api.CreateFileOptions {
 	}
 }
 
-func getExpectedFileResponseForCreate(repoFullName, commitID, treePath string) *api.FileResponse {
+func getExpectedFileResponseForCreate(repoFullName, commitID, treePath, latestCommitSHA string) *api.FileResponse {
 	sha := "a635aa942442ddfdba07468cf9661c08fbdf0ebf"
 	encoding := "base64"
 	content := "VGhpcyBpcyBuZXcgdGV4dA=="
@@ -60,17 +60,18 @@ func getExpectedFileResponseForCreate(repoFullName, commitID, treePath string) *
 	downloadURL := setting.AppURL + repoFullName + "/raw/branch/master/" + treePath
 	return &api.FileResponse{
 		Content: &api.ContentsResponse{
-			Name:        filepath.Base(treePath),
-			Path:        treePath,
-			SHA:         sha,
-			Size:        16,
-			Type:        "file",
-			Encoding:    &encoding,
-			Content:     &content,
-			URL:         &selfURL,
-			HTMLURL:     &htmlURL,
-			GitURL:      &gitURL,
-			DownloadURL: &downloadURL,
+			Name:          filepath.Base(treePath),
+			Path:          treePath,
+			SHA:           sha,
+			LastCommitSHA: latestCommitSHA,
+			Size:          16,
+			Type:          "file",
+			Encoding:      &encoding,
+			Content:       &content,
+			URL:           &selfURL,
+			HTMLURL:       &htmlURL,
+			GitURL:        &gitURL,
+			DownloadURL:   &downloadURL,
 			Links: &api.FileLinksResponse{
 				Self:    &selfURL,
 				GitURL:  &gitURL,
@@ -170,7 +171,8 @@ func TestAPICreateFile(t *testing.T) {
 			resp := session.MakeRequest(t, req, http.StatusCreated)
 			gitRepo, _ := git.OpenRepository(stdCtx.Background(), repo1.RepoPath())
 			commitID, _ := gitRepo.GetBranchCommitID(createFileOptions.NewBranchName)
-			expectedFileResponse := getExpectedFileResponseForCreate("user2/repo1", commitID, treePath)
+			latestCommit, _ := gitRepo.GetCommitByPath(treePath)
+			expectedFileResponse := getExpectedFileResponseForCreate("user2/repo1", commitID, treePath, latestCommit.ID.String())
 			var fileResponse api.FileResponse
 			DecodeJSON(t, resp, &fileResponse)
 			assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -289,7 +291,8 @@ func TestAPICreateFile(t *testing.T) {
 		emptyRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "empty-repo"}).(*repo_model.Repository) // public repo
 		gitRepo, _ := git.OpenRepository(stdCtx.Background(), emptyRepo.RepoPath())
 		commitID, _ := gitRepo.GetBranchCommitID(createFileOptions.NewBranchName)
-		expectedFileResponse := getExpectedFileResponseForCreate("user2/empty-repo", commitID, treePath)
+		latestCommit, _ := gitRepo.GetCommitByPath(treePath)
+		expectedFileResponse := getExpectedFileResponseForCreate("user2/empty-repo", commitID, treePath, latestCommit.ID.String())
 		DecodeJSON(t, resp, &fileResponse)
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
 		assert.EqualValues(t, expectedFileResponse.Commit.SHA, fileResponse.Commit.SHA)

integrations/api_repo_file_update_test.go

@@ -48,7 +48,7 @@ func getUpdateFileOptions() *api.UpdateFileOptions {
 	}
 }
 
-func getExpectedFileResponseForUpdate(commitID, treePath string) *api.FileResponse {
+func getExpectedFileResponseForUpdate(commitID, treePath, lastCommitSHA string) *api.FileResponse {
 	sha := "08bd14b2e2852529157324de9c226b3364e76136"
 	encoding := "base64"
 	content := "VGhpcyBpcyB1cGRhdGVkIHRleHQ="
@@ -58,17 +58,18 @@ func getExpectedFileResponseForUpdate(commitID, treePath string) *api.FileRespon
 	downloadURL := setting.AppURL + "user2/repo1/raw/branch/master/" + treePath
 	return &api.FileResponse{
 		Content: &api.ContentsResponse{
-			Name:        filepath.Base(treePath),
-			Path:        treePath,
-			SHA:         sha,
-			Type:        "file",
-			Size:        20,
-			Encoding:    &encoding,
-			Content:     &content,
-			URL:         &selfURL,
-			HTMLURL:     &htmlURL,
-			GitURL:      &gitURL,
-			DownloadURL: &downloadURL,
+			Name:          filepath.Base(treePath),
+			Path:          treePath,
+			SHA:           sha,
+			LastCommitSHA: lastCommitSHA,
+			Type:          "file",
+			Size:          20,
+			Encoding:      &encoding,
+			Content:       &content,
+			URL:           &selfURL,
+			HTMLURL:       &htmlURL,
+			GitURL:        &gitURL,
+			DownloadURL:   &downloadURL,
 			Links: &api.FileLinksResponse{
 				Self:    &selfURL,
 				GitURL:  &gitURL,
@@ -137,7 +138,8 @@ func TestAPIUpdateFile(t *testing.T) {
 			resp := session.MakeRequest(t, req, http.StatusOK)
 			gitRepo, _ := git.OpenRepository(stdCtx.Background(), repo1.RepoPath())
 			commitID, _ := gitRepo.GetBranchCommitID(updateFileOptions.NewBranchName)
-			expectedFileResponse := getExpectedFileResponseForUpdate(commitID, treePath)
+			lasCommit, _ := gitRepo.GetCommitByPath(treePath)
+			expectedFileResponse := getExpectedFileResponseForUpdate(commitID, treePath, lasCommit.ID.String())
 			var fileResponse api.FileResponse
 			DecodeJSON(t, resp, &fileResponse)
 			assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)

integrations/api_repo_get_contents_list_test.go

@@ -21,7 +21,7 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func getExpectedContentsListResponseForContents(ref, refType string) []*api.ContentsResponse {
+func getExpectedContentsListResponseForContents(ref, refType, lastCommitSHA string) []*api.ContentsResponse {
 	treePath := "README.md"
 	sha := "4b4851ad51df6a7d9f25c979345979eaeb5b349f"
 	selfURL := setting.AppURL + "api/v1/repos/user2/repo1/contents/" + treePath + "?ref=" + ref
@@ -30,15 +30,16 @@ func getExpectedContentsListResponseForContents(ref, refType string) []*api.Cont
 	downloadURL := setting.AppURL + "user2/repo1/raw/" + refType + "/" + ref + "/" + treePath
 	return []*api.ContentsResponse{
 		{
-			Name:        filepath.Base(treePath),
-			Path:        treePath,
-			SHA:         sha,
-			Type:        "file",
-			Size:        30,
-			URL:         &selfURL,
-			HTMLURL:     &htmlURL,
-			GitURL:      &gitURL,
-			DownloadURL: &downloadURL,
+			Name:          filepath.Base(treePath),
+			Path:          treePath,
+			SHA:           sha,
+			LastCommitSHA: lastCommitSHA,
+			Type:          "file",
+			Size:          30,
+			URL:           &selfURL,
+			HTMLURL:       &htmlURL,
+			GitURL:        &gitURL,
+			DownloadURL:   &downloadURL,
 			Links: &api.FileLinksResponse{
 				Self:    &selfURL,
 				GitURL:  &gitURL,
@@ -94,7 +95,9 @@ func testAPIGetContentsList(t *testing.T, u *url.URL) {
 	var contentsListResponse []*api.ContentsResponse
 	DecodeJSON(t, resp, &contentsListResponse)
 	assert.NotNil(t, contentsListResponse)
-	expectedContentsListResponse := getExpectedContentsListResponseForContents(ref, refType)
+	lastCommit, err := gitRepo.GetCommitByPath("README.md")
+	assert.NoError(t, err)
+	expectedContentsListResponse := getExpectedContentsListResponseForContents(ref, refType, lastCommit.ID.String())
 	assert.EqualValues(t, expectedContentsListResponse, contentsListResponse)
 
 	// No ref
@@ -103,17 +106,22 @@ func testAPIGetContentsList(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsListResponse)
 	assert.NotNil(t, contentsListResponse)
-	expectedContentsListResponse = getExpectedContentsListResponseForContents(repo1.DefaultBranch, refType)
+
+	expectedContentsListResponse = getExpectedContentsListResponseForContents(repo1.DefaultBranch, refType, lastCommit.ID.String())
 	assert.EqualValues(t, expectedContentsListResponse, contentsListResponse)
 
-	// ref is the branch we created above  in setup
+	// ref is the branch we created above in setup
 	ref = newBranch
 	refType = "branch"
 	req = NewRequestf(t, "GET", "/api/v1/repos/%s/%s/contents/%s?ref=%s", user2.Name, repo1.Name, treePath, ref)
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsListResponse)
 	assert.NotNil(t, contentsListResponse)
-	expectedContentsListResponse = getExpectedContentsListResponseForContents(ref, refType)
+	branchCommit, err := gitRepo.GetBranchCommit(ref)
+	assert.NoError(t, err)
+	lastCommit, err = branchCommit.GetCommitByPath("README.md")
+	assert.NoError(t, err)
+	expectedContentsListResponse = getExpectedContentsListResponseForContents(ref, refType, lastCommit.ID.String())
 	assert.EqualValues(t, expectedContentsListResponse, contentsListResponse)
 
 	// ref is the new tag we created above in setup
@@ -123,7 +131,11 @@ func testAPIGetContentsList(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsListResponse)
 	assert.NotNil(t, contentsListResponse)
-	expectedContentsListResponse = getExpectedContentsListResponseForContents(ref, refType)
+	tagCommit, err := gitRepo.GetTagCommit(ref)
+	assert.NoError(t, err)
+	lastCommit, err = tagCommit.GetCommitByPath("README.md")
+	assert.NoError(t, err)
+	expectedContentsListResponse = getExpectedContentsListResponseForContents(ref, refType, lastCommit.ID.String())
 	assert.EqualValues(t, expectedContentsListResponse, contentsListResponse)
 
 	// ref is a commit
@@ -133,7 +145,7 @@ func testAPIGetContentsList(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsListResponse)
 	assert.NotNil(t, contentsListResponse)
-	expectedContentsListResponse = getExpectedContentsListResponseForContents(ref, refType)
+	expectedContentsListResponse = getExpectedContentsListResponseForContents(ref, refType, commitID)
 	assert.EqualValues(t, expectedContentsListResponse, contentsListResponse)
 
 	// Test file contents a file with a bad ref

integrations/api_repo_get_contents_test.go

@@ -20,7 +20,7 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func getExpectedContentsResponseForContents(ref, refType string) *api.ContentsResponse {
+func getExpectedContentsResponseForContents(ref, refType, lastCommitSHA string) *api.ContentsResponse {
 	treePath := "README.md"
 	sha := "4b4851ad51df6a7d9f25c979345979eaeb5b349f"
 	encoding := "base64"
@@ -30,17 +30,18 @@ func getExpectedContentsResponseForContents(ref, refType string) *api.ContentsRe
 	gitURL := setting.AppURL + "api/v1/repos/user2/repo1/git/blobs/" + sha
 	downloadURL := setting.AppURL + "user2/repo1/raw/" + refType + "/" + ref + "/" + treePath
 	return &api.ContentsResponse{
-		Name:        treePath,
-		Path:        treePath,
-		SHA:         sha,
-		Type:        "file",
-		Size:        30,
-		Encoding:    &encoding,
-		Content:     &content,
-		URL:         &selfURL,
-		HTMLURL:     &htmlURL,
-		GitURL:      &gitURL,
-		DownloadURL: &downloadURL,
+		Name:          treePath,
+		Path:          treePath,
+		SHA:           sha,
+		LastCommitSHA: lastCommitSHA,
+		Type:          "file",
+		Size:          30,
+		Encoding:      &encoding,
+		Content:       &content,
+		URL:           &selfURL,
+		HTMLURL:       &htmlURL,
+		GitURL:        &gitURL,
+		DownloadURL:   &downloadURL,
 		Links: &api.FileLinksResponse{
 			Self:    &selfURL,
 			GitURL:  &gitURL,
@@ -96,7 +97,8 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	var contentsResponse api.ContentsResponse
 	DecodeJSON(t, resp, &contentsResponse)
 	assert.NotNil(t, contentsResponse)
-	expectedContentsResponse := getExpectedContentsResponseForContents(ref, refType)
+	lastCommit, _ := gitRepo.GetCommitByPath("README.md")
+	expectedContentsResponse := getExpectedContentsResponseForContents(ref, refType, lastCommit.ID.String())
 	assert.EqualValues(t, *expectedContentsResponse, contentsResponse)
 
 	// No ref
@@ -105,7 +107,7 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsResponse)
 	assert.NotNil(t, contentsResponse)
-	expectedContentsResponse = getExpectedContentsResponseForContents(repo1.DefaultBranch, refType)
+	expectedContentsResponse = getExpectedContentsResponseForContents(repo1.DefaultBranch, refType, lastCommit.ID.String())
 	assert.EqualValues(t, *expectedContentsResponse, contentsResponse)
 
 	// ref is the branch we created above  in setup
@@ -115,7 +117,9 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsResponse)
 	assert.NotNil(t, contentsResponse)
-	expectedContentsResponse = getExpectedContentsResponseForContents(ref, refType)
+	branchCommit, _ := gitRepo.GetBranchCommit(ref)
+	lastCommit, _ = branchCommit.GetCommitByPath("README.md")
+	expectedContentsResponse = getExpectedContentsResponseForContents(ref, refType, lastCommit.ID.String())
 	assert.EqualValues(t, *expectedContentsResponse, contentsResponse)
 
 	// ref is the new tag we created above in setup
@@ -125,7 +129,9 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsResponse)
 	assert.NotNil(t, contentsResponse)
-	expectedContentsResponse = getExpectedContentsResponseForContents(ref, refType)
+	tagCommit, _ := gitRepo.GetTagCommit(ref)
+	lastCommit, _ = tagCommit.GetCommitByPath("README.md")
+	expectedContentsResponse = getExpectedContentsResponseForContents(ref, refType, lastCommit.ID.String())
 	assert.EqualValues(t, *expectedContentsResponse, contentsResponse)
 
 	// ref is a commit
@@ -135,7 +141,7 @@ func testAPIGetContents(t *testing.T, u *url.URL) {
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	DecodeJSON(t, resp, &contentsResponse)
 	assert.NotNil(t, contentsResponse)
-	expectedContentsResponse = getExpectedContentsResponseForContents(ref, refType)
+	expectedContentsResponse = getExpectedContentsResponseForContents(ref, refType, commitID)
 	assert.EqualValues(t, *expectedContentsResponse, contentsResponse)
 
 	// Test file contents a file with a bad ref

integrations/repofiles_update_test.go

@@ -47,7 +47,7 @@ func getUpdateRepoFileOptions(repo *repo_model.Repository) *files_service.Update
 	}
 }
 
-func getExpectedFileResponseForRepofilesCreate(commitID string) *api.FileResponse {
+func getExpectedFileResponseForRepofilesCreate(commitID, lastCommitSHA string) *api.FileResponse {
 	treePath := "new/file.txt"
 	encoding := "base64"
 	content := "VGhpcyBpcyBhIE5FVyBmaWxl"
@@ -57,17 +57,18 @@ func getExpectedFileResponseForRepofilesCreate(commitID string) *api.FileRespons
 	downloadURL := setting.AppURL + "user2/repo1/raw/branch/master/" + treePath
 	return &api.FileResponse{
 		Content: &api.ContentsResponse{
-			Name:        filepath.Base(treePath),
-			Path:        treePath,
-			SHA:         "103ff9234cefeee5ec5361d22b49fbb04d385885",
-			Type:        "file",
-			Size:        18,
-			Encoding:    &encoding,
-			Content:     &content,
-			URL:         &selfURL,
-			HTMLURL:     &htmlURL,
-			GitURL:      &gitURL,
-			DownloadURL: &downloadURL,
+			Name:          filepath.Base(treePath),
+			Path:          treePath,
+			SHA:           "103ff9234cefeee5ec5361d22b49fbb04d385885",
+			LastCommitSHA: lastCommitSHA,
+			Type:          "file",
+			Size:          18,
+			Encoding:      &encoding,
+			Content:       &content,
+			URL:           &selfURL,
+			HTMLURL:       &htmlURL,
+			GitURL:        &gitURL,
+			DownloadURL:   &downloadURL,
 			Links: &api.FileLinksResponse{
 				Self:    &selfURL,
 				GitURL:  &gitURL,
@@ -115,7 +116,7 @@ func getExpectedFileResponseForRepofilesCreate(commitID string) *api.FileRespons
 	}
 }
 
-func getExpectedFileResponseForRepofilesUpdate(commitID, filename string) *api.FileResponse {
+func getExpectedFileResponseForRepofilesUpdate(commitID, filename, lastCommitSHA string) *api.FileResponse {
 	encoding := "base64"
 	content := "VGhpcyBpcyBVUERBVEVEIGNvbnRlbnQgZm9yIHRoZSBSRUFETUUgZmlsZQ=="
 	selfURL := setting.AppURL + "api/v1/repos/user2/repo1/contents/" + filename + "?ref=master"
@@ -124,17 +125,18 @@ func getExpectedFileResponseForRepofilesUpdate(commitID, filename string) *api.F
 	downloadURL := setting.AppURL + "user2/repo1/raw/branch/master/" + filename
 	return &api.FileResponse{
 		Content: &api.ContentsResponse{
-			Name:        filename,
-			Path:        filename,
-			SHA:         "dbf8d00e022e05b7e5cf7e535de857de57925647",
-			Type:        "file",
-			Size:        43,
-			Encoding:    &encoding,
-			Content:     &content,
-			URL:         &selfURL,
-			HTMLURL:     &htmlURL,
-			GitURL:      &gitURL,
-			DownloadURL: &downloadURL,
+			Name:          filename,
+			Path:          filename,
+			SHA:           "dbf8d00e022e05b7e5cf7e535de857de57925647",
+			LastCommitSHA: lastCommitSHA,
+			Type:          "file",
+			Size:          43,
+			Encoding:      &encoding,
+			Content:       &content,
+			URL:           &selfURL,
+			HTMLURL:       &htmlURL,
+			GitURL:        &gitURL,
+			DownloadURL:   &downloadURL,
 			Links: &api.FileLinksResponse{
 				Self:    &selfURL,
 				GitURL:  &gitURL,
@@ -206,7 +208,8 @@ func TestCreateOrUpdateRepoFileForCreate(t *testing.T) {
 		defer gitRepo.Close()
 
 		commitID, _ := gitRepo.GetBranchCommitID(opts.NewBranch)
-		expectedFileResponse := getExpectedFileResponseForRepofilesCreate(commitID)
+		lastCommit, _ := gitRepo.GetCommitByPath("new/file.txt")
+		expectedFileResponse := getExpectedFileResponseForRepofilesCreate(commitID, lastCommit.ID.String())
 		assert.NotNil(t, expectedFileResponse)
 		if expectedFileResponse != nil {
 			assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -241,8 +244,9 @@ func TestCreateOrUpdateRepoFileForUpdate(t *testing.T) {
 		gitRepo, _ := git.OpenRepository(git.DefaultContext, repo.RepoPath())
 		defer gitRepo.Close()
 
-		commitID, _ := gitRepo.GetBranchCommitID(opts.NewBranch)
-		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commitID, opts.TreePath)
+		commit, _ := gitRepo.GetBranchCommit(opts.NewBranch)
+		lastCommit, _ := commit.GetCommitByPath(opts.TreePath)
+		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commit.ID.String(), opts.TreePath, lastCommit.ID.String())
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
 		assert.EqualValues(t, expectedFileResponse.Commit.SHA, fileResponse.Commit.SHA)
 		assert.EqualValues(t, expectedFileResponse.Commit.HTMLURL, fileResponse.Commit.HTMLURL)
@@ -277,7 +281,8 @@ func TestCreateOrUpdateRepoFileForUpdateWithFileMove(t *testing.T) {
 		defer gitRepo.Close()
 
 		commit, _ := gitRepo.GetBranchCommit(opts.NewBranch)
-		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commit.ID.String(), opts.TreePath)
+		lastCommit, _ := commit.GetCommitByPath(opts.TreePath)
+		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commit.ID.String(), opts.TreePath, lastCommit.ID.String())
 		// assert that the old file no longer exists in the last commit of the branch
 		fromEntry, err := commit.GetTreeEntryByPath(opts.FromTreePath)
 		switch err.(type) {
@@ -326,8 +331,9 @@ func TestCreateOrUpdateRepoFileWithoutBranchNames(t *testing.T) {
 		gitRepo, _ := git.OpenRepository(git.DefaultContext, repo.RepoPath())
 		defer gitRepo.Close()
 
-		commitID, _ := gitRepo.GetBranchCommitID(repo.DefaultBranch)
-		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commitID, opts.TreePath)
+		commit, _ := gitRepo.GetBranchCommit(repo.DefaultBranch)
+		lastCommit, _ := commit.GetCommitByPath(opts.TreePath)
+		expectedFileResponse := getExpectedFileResponseForRepofilesUpdate(commit.ID.String(), opts.TreePath, lastCommit.ID.String())
 		assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
 	})
 }

modules/git/repo_commit.go

@@ -11,6 +11,7 @@ import (
 	"strconv"
 	"strings"
 
+	"code.gitea.io/gitea/modules/cache"
 	"code.gitea.io/gitea/modules/setting"
 )
 
@@ -434,3 +435,20 @@ func (repo *Repository) IsCommitInBranch(commitID, branch string) (r bool, err e
 	}
 	return len(stdout) > 0, err
 }
+
+func (repo *Repository) AddLastCommitCache(cacheKey, fullName, sha string) error {
+	if repo.LastCommitCache == nil {
+		commitsCount, err := cache.GetInt64(cacheKey, func() (int64, error) {
+			commit, err := repo.GetCommit(sha)
+			if err != nil {
+				return 0, err
+			}
+			return commit.CommitsCount()
+		})
+		if err != nil {
+			return err
+		}
+		repo.LastCommitCache = NewLastCommitCache(commitsCount, fullName, repo, cache.GetCache())
+	}
+	return nil
+}

modules/structs/repo_file.go

@@ -87,9 +87,10 @@ type FileLinksResponse struct {
 
 // ContentsResponse contains information about a repo's entry's (dir, file, symlink, submodule) metadata and content
 type ContentsResponse struct {
-	Name string `json:"name"`
-	Path string `json:"path"`
-	SHA  string `json:"sha"`
+	Name          string `json:"name"`
+	Path          string `json:"path"`
+	SHA           string `json:"sha"`
+	LastCommitSHA string `json:"last_commit_sha"`
 	// `type` will be `file`, `dir`, `symlink`, or `submodule`
 	Type string `json:"type"`
 	Size int64  `json:"size"`

routers/api/v1/utils/git.go

@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"net/http"
 
-	"code.gitea.io/gitea/modules/cache"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
@@ -35,19 +34,11 @@ func ResolveRefOrSha(ctx *context.APIContext, ref string) string {
 		}
 	}
 
-	if ctx.Repo.GitRepo != nil && ctx.Repo.GitRepo.LastCommitCache == nil {
-		commitsCount, err := cache.GetInt64(ctx.Repo.Repository.GetCommitsCountCacheKey(ref, true), func() (int64, error) {
-			commit, err := ctx.Repo.GitRepo.GetCommit(sha)
-			if err != nil {
-				return 0, err
-			}
-			return commit.CommitsCount()
-		})
+	if ctx.Repo.GitRepo != nil {
+		err := ctx.Repo.GitRepo.AddLastCommitCache(ctx.Repo.Repository.GetCommitsCountCacheKey(ref, ref != sha), ctx.Repo.Repository.FullName(), sha)
 		if err != nil {
 			log.Error("Unable to get commits count for %s in %s. Error: %v", sha, ctx.Repo.Repository.FullName(), err)
-			return sha
 		}
-		ctx.Repo.GitRepo.LastCommitCache = git.NewLastCommitCache(commitsCount, ctx.Repo.Repository.FullName(), ctx.Repo.GitRepo, cache.GetCache())
 	}
 
 	return sha

services/repository/files/content.go

@@ -165,13 +165,24 @@ func GetContents(ctx context.Context, repo *repo_model.Repository, treePath, ref
 	}
 	selfURLString := selfURL.String()
 
+	err = gitRepo.AddLastCommitCache(repo.GetCommitsCountCacheKey(ref, refType != git.ObjectCommit), repo.FullName(), commitID)
+	if err != nil {
+		return nil, err
+	}
+
+	lastCommit, err := commit.GetCommitByPath(treePath)
+	if err != nil {
+		return nil, err
+	}
+
 	// All content types have these fields in populated
 	contentsResponse := &api.ContentsResponse{
-		Name: entry.Name(),
-		Path: treePath,
-		SHA:  entry.ID.String(),
-		Size: entry.Size(),
-		URL:  &selfURLString,
+		Name:          entry.Name(),
+		Path:          treePath,
+		SHA:           entry.ID.String(),
+		LastCommitSHA: lastCommit.ID.String(),
+		Size:          entry.Size(),
+		URL:           &selfURLString,
 		Links: &api.FileLinksResponse{
 			Self: &selfURLString,
 		},

services/repository/files/content_test.go

@@ -33,17 +33,18 @@ func getExpectedReadmeContentsResponse() *api.ContentsResponse {
 	gitURL := "https://try.gitea.io/api/v1/repos/user2/repo1/git/blobs/" + sha
 	downloadURL := "https://try.gitea.io/user2/repo1/raw/branch/master/" + treePath
 	return &api.ContentsResponse{
-		Name:        treePath,
-		Path:        treePath,
-		SHA:         "4b4851ad51df6a7d9f25c979345979eaeb5b349f",
-		Type:        "file",
-		Size:        30,
-		Encoding:    &encoding,
-		Content:     &content,
-		URL:         &selfURL,
-		HTMLURL:     &htmlURL,
-		GitURL:      &gitURL,
-		DownloadURL: &downloadURL,
+		Name:          treePath,
+		Path:          treePath,
+		SHA:           "4b4851ad51df6a7d9f25c979345979eaeb5b349f",
+		LastCommitSHA: "65f1bf27bc3bf70f64657658635e66094edbcb4d",
+		Type:          "file",
+		Size:          30,
+		Encoding:      &encoding,
+		Content:       &content,
+		URL:           &selfURL,
+		HTMLURL:       &htmlURL,
+		GitURL:        &gitURL,
+		DownloadURL:   &downloadURL,
 		Links: &api.FileLinksResponse{
 			Self:    &selfURL,
 			GitURL:  &gitURL,

services/repository/files/file_test.go

@@ -43,17 +43,18 @@ func getExpectedFileResponse() *api.FileResponse {
 	downloadURL := setting.AppURL + "user2/repo1/raw/branch/master/" + treePath
 	return &api.FileResponse{
 		Content: &api.ContentsResponse{
-			Name:        treePath,
-			Path:        treePath,
-			SHA:         sha,
-			Type:        "file",
-			Size:        30,
-			Encoding:    &encoding,
-			Content:     &content,
-			URL:         &selfURL,
-			HTMLURL:     &htmlURL,
-			GitURL:      &gitURL,
-			DownloadURL: &downloadURL,
+			Name:          treePath,
+			Path:          treePath,
+			SHA:           sha,
+			LastCommitSHA: "65f1bf27bc3bf70f64657658635e66094edbcb4d",
+			Type:          "file",
+			Size:          30,
+			Encoding:      &encoding,
+			Content:       &content,
+			URL:           &selfURL,
+			HTMLURL:       &htmlURL,
+			GitURL:        &gitURL,
+			DownloadURL:   &downloadURL,
 			Links: &api.FileLinksResponse{
 				Self:    &selfURL,
 				GitURL:  &gitURL,

templates/swagger/v1_json.tmpl

@@ -13779,6 +13779,10 @@
           "type": "string",
           "x-go-name": "HTMLURL"
         },
+        "last_commit_sha": {
+          "type": "string",
+          "x-go-name": "LastCommitSHA"
+        },
         "name": {
           "type": "string",
           "x-go-name": "Name"