Restore functionality for early gits (#7775)

* Change tests to make it possible to run TestGit with 1.7.2

* Make merge run on 1.7.2

* Fix tracking and staging branch name problem

* Ensure that git 1.7.2 works on tests

* ensure that there is no chance for conflicts

* Fix-up missing merge issues

* Final rm

* Ensure LFS filters run on the tests

* Do not sign commits from temp repo

* Restore tracking fetch change

* Apply suggestions from code review

* Update modules/repofiles/temp_repo.go

modules/repofiles/temp_repo.go

@@ -21,6 +21,8 @@ import (
 	"code.gitea.io/gitea/modules/process"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/services/gitdiff"
+
+	"github.com/mcuadros/go-version"
 )
 
 // TemporaryUploadRepository is a type to wrap our upload repositories as a shallow clone
@@ -254,6 +256,11 @@ func (t *TemporaryUploadRepository) CommitTree(author, committer *models.User, t
 	authorSig := author.NewGitSig()
 	committerSig := committer.NewGitSig()
 
+	binVersion, err := git.BinVersion()
+	if err != nil {
+		return "", fmt.Errorf("Unable to get git version: %v", err)
+	}
+
 	// FIXME: Should we add SSH_ORIGINAL_COMMAND to this
 	// Because this may call hooks we should pass in the environment
 	env := append(os.Environ(),
@@ -264,11 +271,21 @@ func (t *TemporaryUploadRepository) CommitTree(author, committer *models.User, t
 		"GIT_COMMITTER_EMAIL="+committerSig.Email,
 		"GIT_COMMITTER_DATE="+commitTimeStr,
 	)
-	commitHash, stderr, err := process.GetManager().ExecDirEnv(5*time.Minute,
+	messageBytes := new(bytes.Buffer)
+	_, _ = messageBytes.WriteString(message)
+	_, _ = messageBytes.WriteString("\n")
+
+	args := []string{"commit-tree", treeHash, "-p", "HEAD"}
+	if version.Compare(binVersion, "2.0.0", ">=") {
+		args = append(args, "--no-gpg-sign")
+	}
+
+	commitHash, stderr, err := process.GetManager().ExecDirEnvStdIn(5*time.Minute,
 		t.basePath,
 		fmt.Sprintf("commitTree (git commit-tree): %s", t.basePath),
 		env,
-		git.GitExecutable, "commit-tree", treeHash, "-p", "HEAD", "-m", message)
+		messageBytes,
+		git.GitExecutable, args...)
 	if err != nil {
 		return "", fmt.Errorf("git commit-tree: %s", stderr)
 	}
@@ -328,6 +345,12 @@ func (t *TemporaryUploadRepository) DiffIndex() (diff *gitdiff.Diff, err error)
 
 // CheckAttribute checks the given attribute of the provided files
 func (t *TemporaryUploadRepository) CheckAttribute(attribute string, args ...string) (map[string]map[string]string, error) {
+	binVersion, err := git.BinVersion()
+	if err != nil {
+		log.Error("Error retrieving git version: %v", err)
+		return nil, err
+	}
+
 	stdOut := new(bytes.Buffer)
 	stdErr := new(bytes.Buffer)
 
@@ -335,7 +358,14 @@ func (t *TemporaryUploadRepository) CheckAttribute(attribute string, args ...str
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	defer cancel()
 
-	cmdArgs := []string{"check-attr", "-z", attribute, "--cached", "--"}
+	cmdArgs := []string{"check-attr", "-z", attribute}
+
+	// git check-attr --cached first appears in git 1.7.8
+	if version.Compare(binVersion, "1.7.8", ">=") {
+		cmdArgs = append(cmdArgs, "--cached")
+	}
+	cmdArgs = append(cmdArgs, "--")
+
 	for _, arg := range args {
 		if arg != "" {
 			cmdArgs = append(cmdArgs, arg)
@@ -353,7 +383,7 @@ func (t *TemporaryUploadRepository) CheckAttribute(attribute string, args ...str
 	}
 
 	pid := process.GetManager().Add(desc, cmd)
-	err := cmd.Wait()
+	err = cmd.Wait()
 	process.GetManager().Remove(pid)
 
 	if err != nil {

modules/repofiles/update.go

@@ -313,12 +313,6 @@ func CreateOrUpdateRepoFile(repo *models.Repository, doer *models.User, opts *Up
 		}
 	}
 
-	// Check there is no way this can return multiple infos
-	filename2attribute2info, err := t.CheckAttribute("filter", treePath)
-	if err != nil {
-		return nil, err
-	}
-
 	content := opts.Content
 	if bom {
 		content = string(charset.UTF8BOM) + content
@@ -341,16 +335,23 @@ func CreateOrUpdateRepoFile(repo *models.Repository, doer *models.User, opts *Up
 	opts.Content = content
 	var lfsMetaObject *models.LFSMetaObject
 
-	if setting.LFS.StartServer && filename2attribute2info[treePath] != nil && filename2attribute2info[treePath]["filter"] == "lfs" {
-		// OK so we are supposed to LFS this data!
-		oid, err := models.GenerateLFSOid(strings.NewReader(opts.Content))
+	if setting.LFS.StartServer {
+		// Check there is no way this can return multiple infos
+		filename2attribute2info, err := t.CheckAttribute("filter", treePath)
 		if err != nil {
 			return nil, err
 		}
-		lfsMetaObject = &models.LFSMetaObject{Oid: oid, Size: int64(len(opts.Content)), RepositoryID: repo.ID}
-		content = lfsMetaObject.Pointer()
-	}
 
+		if filename2attribute2info[treePath] != nil && filename2attribute2info[treePath]["filter"] == "lfs" {
+			// OK so we are supposed to LFS this data!
+			oid, err := models.GenerateLFSOid(strings.NewReader(opts.Content))
+			if err != nil {
+				return nil, err
+			}
+			lfsMetaObject = &models.LFSMetaObject{Oid: oid, Size: int64(len(opts.Content)), RepositoryID: repo.ID}
+			content = lfsMetaObject.Pointer()
+		}
+	}
 	// Add the object to the database
 	objectHash, err := t.HashObject(strings.NewReader(content))
 	if err != nil {

modules/repofiles/upload.go

@@ -74,9 +74,12 @@ func UploadRepoFiles(repo *models.Repository, doer *models.User, opts *UploadRep
 		infos[i] = uploadInfo{upload: upload}
 	}
 
-	filename2attribute2info, err := t.CheckAttribute("filter", names...)
-	if err != nil {
-		return err
+	var filename2attribute2info map[string]map[string]string
+	if setting.LFS.StartServer {
+		filename2attribute2info, err = t.CheckAttribute("filter", names...)
+		if err != nil {
+			return err
+		}
 	}
 
 	// Copy uploaded files into repository.
@@ -88,7 +91,7 @@ func UploadRepoFiles(repo *models.Repository, doer *models.User, opts *UploadRep
 		defer file.Close()
 
 		var objectHash string
-		if filename2attribute2info[uploadInfo.upload.Name] != nil && filename2attribute2info[uploadInfo.upload.Name]["filter"] == "lfs" {
+		if setting.LFS.StartServer && filename2attribute2info[uploadInfo.upload.Name] != nil && filename2attribute2info[uploadInfo.upload.Name]["filter"] == "lfs" {
 			// Handle LFS
 			// FIXME: Inefficient! this should probably happen in models.Upload
 			oid, err := models.GenerateLFSOid(file)