Allow API to create file on empty repo (#19224)

This PR adds the necessary work to make it possible to create files on empty
repos using the API.

Fix #10993

Signed-off-by: Andrew Thornton <[email protected]>

Author: zeripath

integrations/api_repo_file_create_test.go

@@ -49,14 +49,14 @@ func getCreateFileOptions() api.CreateFileOptions {
 	}
 }
 
-func getExpectedFileResponseForCreate(commitID, treePath string) *api.FileResponse {
+func getExpectedFileResponseForCreate(repoFullName, commitID, treePath string) *api.FileResponse {
 	sha := "a635aa942442ddfdba07468cf9661c08fbdf0ebf"
 	encoding := "base64"
 	content := "VGhpcyBpcyBuZXcgdGV4dA=="
-	selfURL := setting.AppURL + "api/v1/repos/user2/repo1/contents/" + treePath + "?ref=master"
-	htmlURL := setting.AppURL + "user2/repo1/src/branch/master/" + treePath
-	gitURL := setting.AppURL + "api/v1/repos/user2/repo1/git/blobs/" + sha
-	downloadURL := setting.AppURL + "user2/repo1/raw/branch/master/" + treePath
+	selfURL := setting.AppURL + "api/v1/repos/" + repoFullName + "/contents/" + treePath + "?ref=master"
+	htmlURL := setting.AppURL + repoFullName + "/src/branch/master/" + treePath
+	gitURL := setting.AppURL + "api/v1/repos/" + repoFullName + "/git/blobs/" + sha
+	downloadURL := setting.AppURL + repoFullName + "/raw/branch/master/" + treePath
 	return &api.FileResponse{
 		Content: &api.ContentsResponse{
 			Name:        filepath.Base(treePath),
@@ -78,10 +78,10 @@ func getExpectedFileResponseForCreate(commitID, treePath string) *api.FileRespon
 		},
 		Commit: &api.FileCommitResponse{
 			CommitMeta: api.CommitMeta{
-				URL: setting.AppURL + "api/v1/repos/user2/repo1/git/commits/" + commitID,
+				URL: setting.AppURL + "api/v1/repos/" + repoFullName + "/git/commits/" + commitID,
 				SHA: commitID,
 			},
-			HTMLURL: setting.AppURL + "user2/repo1/commit/" + commitID,
+			HTMLURL: setting.AppURL + repoFullName + "/commit/" + commitID,
 			Author: &api.CommitUser{
 				Identity: api.Identity{
 					Name:  "Anne Doe",
@@ -169,7 +169,7 @@ func TestAPICreateFile(t *testing.T) {
 			resp := session.MakeRequest(t, req, http.StatusCreated)
 			gitRepo, _ := git.OpenRepository(repo1.RepoPath())
 			commitID, _ := gitRepo.GetBranchCommitID(createFileOptions.NewBranchName)
-			expectedFileResponse := getExpectedFileResponseForCreate(commitID, treePath)
+			expectedFileResponse := getExpectedFileResponseForCreate("user2/repo1", commitID, treePath)
 			var fileResponse api.FileResponse
 			DecodeJSON(t, resp, &fileResponse)
 			assert.EqualValues(t, expectedFileResponse.Content, fileResponse.Content)
@@ -276,5 +276,29 @@ func TestAPICreateFile(t *testing.T) {
 		url = fmt.Sprintf("/api/v1/repos/%s/%s/contents/%s?token=%s", user2.Name, repo1.Name, treePath, token4)
 		req = NewRequestWithJSON(t, "POST", url, &createFileOptions)
 		session.MakeRequest(t, req, http.StatusForbidden)
+
+		// Test creating a file in an empty repository
+		doAPICreateRepository(NewAPITestContext(t, "user2", "empty-repo"), true)(t)
+		createFileOptions = getCreateFileOptions()
+		fileID++
+		treePath = fmt.Sprintf("new/file%d.txt", fileID)
+		url = fmt.Sprintf("/api/v1/repos/%s/%s/contents/%s?token=%s", user2.Name, "empty-repo", treePath, token2)
+		req = NewRequestWithJSON(t, "POST", url, &createFileOptions)
+		resp = session.MakeRequest(t, req, http.StatusCreated)
+		emptyRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user2", Name: "empty-repo"}).(*repo_model.Repository) // public repo
+		gitRepo, _ := git.OpenRepository(emptyRepo.RepoPath())
+		commitID, _ := gitRepo.GetBranchCommitID(createFileOptions.NewBranchName)
+		expectedFileResponse := getExpectedFileResponseForCreate("user2/empty-repo", commitID, treePath)
+		DecodeJSON(t, resp, &fileResponse)
+		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)
+		assert.EqualValues(t, expectedFileResponse.Commit.Author.Email, fileResponse.Commit.Author.Email)
+		assert.EqualValues(t, expectedFileResponse.Commit.Author.Name, fileResponse.Commit.Author.Name)
+		assert.EqualValues(t, expectedFileResponse.Commit.Author.Date, fileResponse.Commit.Author.Date)
+		assert.EqualValues(t, expectedFileResponse.Commit.Committer.Email, fileResponse.Commit.Committer.Email)
+		assert.EqualValues(t, expectedFileResponse.Commit.Committer.Name, fileResponse.Commit.Committer.Name)
+		assert.EqualValues(t, expectedFileResponse.Commit.Committer.Date, fileResponse.Commit.Committer.Date)
+		gitRepo.Close()
 	})
 }

routers/api/v1/repo/file.go

@@ -233,9 +233,6 @@ func CreateFile(ctx *context.APIContext) {
 	//     "$ref": "#/responses/error"
 
 	apiOpts := web.GetForm(ctx).(*api.CreateFileOptions)
-	if ctx.Repo.Repository.IsEmpty {
-		ctx.Error(http.StatusUnprocessableEntity, "RepoIsEmpty", fmt.Errorf("repo is empty"))
-	}
 
 	if apiOpts.BranchName == "" {
 		apiOpts.BranchName = ctx.Repo.Repository.DefaultBranch

services/repository/files/cherry_pick.go

@@ -97,9 +97,9 @@ func CherryPick(ctx context.Context, repo *repo_model.Repository, doer *user_mod
 	// Now commit the tree
 	var commitHash string
 	if opts.Dates != nil {
-		commitHash, err = t.CommitTreeWithDate(author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
+		commitHash, err = t.CommitTreeWithDate("HEAD", author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
 	} else {
-		commitHash, err = t.CommitTree(author, committer, treeHash, message, opts.Signoff)
+		commitHash, err = t.CommitTree("HEAD", author, committer, treeHash, message, opts.Signoff)
 	}
 	if err != nil {
 		return nil, err

services/repository/files/delete.go

@@ -179,9 +179,9 @@ func DeleteRepoFile(ctx context.Context, repo *repo_model.Repository, doer *user
 	// Now commit the tree
 	var commitHash string
 	if opts.Dates != nil {
-		commitHash, err = t.CommitTreeWithDate(author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
+		commitHash, err = t.CommitTreeWithDate("HEAD", author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
 	} else {
-		commitHash, err = t.CommitTree(author, committer, treeHash, message, opts.Signoff)
+		commitHash, err = t.CommitTree("HEAD", author, committer, treeHash, message, opts.Signoff)
 	}
 	if err != nil {
 		return nil, err

services/repository/files/patch.go

@@ -164,9 +164,9 @@ func ApplyDiffPatch(ctx context.Context, repo *repo_model.Repository, doer *user
 	// Now commit the tree
 	var commitHash string
 	if opts.Dates != nil {
-		commitHash, err = t.CommitTreeWithDate(author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
+		commitHash, err = t.CommitTreeWithDate("HEAD", author, committer, treeHash, message, opts.Signoff, opts.Dates.Author, opts.Dates.Committer)
 	} else {
-		commitHash, err = t.CommitTree(author, committer, treeHash, message, opts.Signoff)
+		commitHash, err = t.CommitTree("HEAD", author, committer, treeHash, message, opts.Signoff)
 	}
 	if err != nil {
 		return nil, err

services/repository/files/temp_repo.go

@@ -77,6 +77,19 @@ func (t *TemporaryUploadRepository) Clone(branch string) error {
 	return nil
 }
 
+// Init the repository
+func (t *TemporaryUploadRepository) Init() error {
+	if err := git.InitRepository(t.ctx, t.basePath, false); err != nil {
+		return err
+	}
+	gitRepo, err := git.OpenRepositoryCtx(t.ctx, t.basePath)
+	if err != nil {
+		return err
+	}
+	t.gitRepo = gitRepo
+	return nil
+}
+
 // SetDefaultIndex sets the git index to our HEAD
 func (t *TemporaryUploadRepository) SetDefaultIndex() error {
 	if _, err := git.NewCommand(t.ctx, "read-tree", "HEAD").RunInDir(t.basePath); err != nil {
@@ -209,12 +222,12 @@ func (t *TemporaryUploadRepository) GetLastCommitByRef(ref string) (string, erro
 }
 
 // CommitTree creates a commit from a given tree for the user with provided message
-func (t *TemporaryUploadRepository) CommitTree(author, committer *user_model.User, treeHash, message string, signoff bool) (string, error) {
-	return t.CommitTreeWithDate(author, committer, treeHash, message, signoff, time.Now(), time.Now())
+func (t *TemporaryUploadRepository) CommitTree(parent string, author, committer *user_model.User, treeHash, message string, signoff bool) (string, error) {
+	return t.CommitTreeWithDate(parent, author, committer, treeHash, message, signoff, time.Now(), time.Now())
 }
 
 // CommitTreeWithDate creates a commit from a given tree for the user with provided message
-func (t *TemporaryUploadRepository) CommitTreeWithDate(author, committer *user_model.User, treeHash, message string, signoff bool, authorDate, committerDate time.Time) (string, error) {
+func (t *TemporaryUploadRepository) CommitTreeWithDate(parent string, author, committer *user_model.User, treeHash, message string, signoff bool, authorDate, committerDate time.Time) (string, error) {
 	authorSig := author.NewGitSig()
 	committerSig := committer.NewGitSig()
 
@@ -235,11 +248,23 @@ func (t *TemporaryUploadRepository) CommitTreeWithDate(author, committer *user_m
 	_, _ = messageBytes.WriteString(message)
 	_, _ = messageBytes.WriteString("\n")
 
-	args := []string{"commit-tree", treeHash, "-p", "HEAD"}
+	var args []string
+	if parent != "" {
+		args = []string{"commit-tree", treeHash, "-p", parent}
+	} else {
+		args = []string{"commit-tree", treeHash}
+	}
 
 	// Determine if we should sign
 	if git.CheckGitVersionAtLeast("1.7.9") == nil {
-		sign, keyID, signer, _ := asymkey_service.SignCRUDAction(t.ctx, t.repo.RepoPath(), author, t.basePath, "HEAD")
+		var sign bool
+		var keyID string
+		var signer *git.Signature
+		if parent != "" {
+			sign, keyID, signer, _ = asymkey_service.SignCRUDAction(t.ctx, t.repo.RepoPath(), author, t.basePath, parent)
+		} else {
+			sign, keyID, signer, _ = asymkey_service.SignInitialCommit(t.ctx, t.repo.RepoPath(), author)
+		}
 		if sign {
 			args = append(args, "-S"+keyID)
 			if t.repo.GetTrustModel() == repo_model.CommitterTrustModel || t.repo.GetTrustModel() == repo_model.CollaboratorCommitterTrustModel {