Add support for git-svn repository.

1. Can detect repository automatically.
2. Remap push/pull/fetch commands to git svn dcommit/rebase/fetch
commands.
3. Command log window will show the repository type.

pkg/commands/git_commands/common.go

@@ -1,6 +1,8 @@
 package git_commands
 
 import (
+	"os"
+	"path/filepath"
 	gogit "github.com/jesseduffield/go-git/v5"
 	"github.com/jesseduffield/lazygit/pkg/commands/oscommands"
 	"github.com/jesseduffield/lazygit/pkg/common"
@@ -16,6 +18,27 @@ type GitCommon struct {
 	repo        *gogit.Repository
 	config      *ConfigCommands
 	pagerConfig *config.PagerConfig
+	IsGitSvnRepo bool
+}
+
+func (self *GitCommon) detectGitSvnRepo() {
+	if self.Common != nil && !self.Common.UserConfig().Git.EnableGitSvnCompat {
+		self.IsGitSvnRepo = false
+		return
+	}
+
+	if self.repoPaths == nil {
+		self.IsGitSvnRepo = false
+		return
+	}
+
+	svnDir := filepath.Join(self.repoPaths.RepoGitDirPath(), "svn")
+	if info, err := os.Stat(svnDir); err == nil && info.IsDir() {
+		self.IsGitSvnRepo = true
+		self.Common.Log.Info("Detected Git-SVN repository (found .git/svn)")
+	} else {
+		self.IsGitSvnRepo = false
+	}
 }
 
 func NewGitCommon(
@@ -28,7 +51,7 @@ func NewGitCommon(
 	config *ConfigCommands,
 	pagerConfig *config.PagerConfig,
 ) *GitCommon {
-	return &GitCommon{
+	gitCommon := &GitCommon{
 		Common:      cmn,
 		version:     version,
 		cmd:         cmd,
@@ -38,4 +61,10 @@ func NewGitCommon(
 		config:      config,
 		pagerConfig: pagerConfig,
 	}
+	gitCommon.detectGitSvnRepo()
+	return gitCommon
+}
+
+func (self *GitCommon) IsSvnRepo() bool {
+	return self.IsGitSvnRepo
 }

pkg/commands/git_commands/sync.go

@@ -29,6 +29,11 @@ type PushOpts struct {
 }
 
 func (self *SyncCommands) PushCmdObj(task gocui.Task, opts PushOpts) (*oscommands.CmdObj, error) {
+	if self.IsGitSvnRepo {
+		cmdArgs := NewGitCmd("svn").Arg("dcommit").ToArgv()
+		return self.cmd.New(cmdArgs).PromptOnCredentialRequest(task), nil
+	}
+
 	if opts.UpstreamBranch != "" && opts.UpstreamRemote == "" {
 		return nil, errors.New(self.Tr.MustSpecifyOriginError)
 	}
@@ -63,6 +68,11 @@ func (self *SyncCommands) fetchCommandBuilder(fetchAll bool) *GitCommandBuilder
 }
 
 func (self *SyncCommands) FetchCmdObj(task gocui.Task) *oscommands.CmdObj {
+	if self.IsGitSvnRepo {
+		cmdArgs := NewGitCmd("svn").Arg("fetch").ToArgv()
+		return self.cmd.New(cmdArgs).PromptOnCredentialRequest(task)
+	}
+
 	cmdArgs := self.fetchCommandBuilder(self.UserConfig().Git.FetchAll).ToArgv()
 
 	cmdObj := self.cmd.New(cmdArgs)
@@ -96,6 +106,11 @@ type PullOptions struct {
 }
 
 func (self *SyncCommands) Pull(task gocui.Task, opts PullOptions) error {
+	if self.IsGitSvnRepo {
+		cmdArgs := NewGitCmd("svn").Arg("rebase").ToArgv()
+		return self.cmd.New(cmdArgs).PromptOnCredentialRequest(task).Run()
+	}
+
 	cmdArgs := NewGitCmd("pull").
 		Arg("--no-edit").
 		ArgIf(opts.FastForwardOnly, "--ff-only").

pkg/config/user_config.go

@@ -321,6 +321,8 @@ type GitConfig struct {
 	RemoteBranchSortOrder string `yaml:"remoteBranchSortOrder" jsonschema:"enum=date,enum=alphabetical"`
 	// When copying commit hashes to the clipboard, truncate them to this length. Set to 40 to disable truncation.
 	TruncateCopiedCommitHashesTo int `yaml:"truncateCopiedCommitHashesTo"`
+	// If true, will detect if git repository is created using git-svn, is so, will use git svn dcommit/rebase for push/pull operations.
+	EnableGitSvnCompat bool `toml:"EnableGitSvnCompat"`
 }
 
 type PagerType string
@@ -857,6 +859,7 @@ func GetDefaultConfig() *UserConfig {
 			BranchPrefix:                 "",
 			ParseEmoji:                   false,
 			TruncateCopiedCommitHashesTo: 12,
+			EnableGitSvnCompat:           true,
 		},
 		Refresher: RefresherConfig{
 			RefreshInterval: 10,

pkg/gui/command_log_panel.go

@@ -59,6 +59,12 @@ func (gui *Gui) printCommandLogHeader() {
 	)
 	fmt.Fprintln(gui.Views.Extras, style.FgCyan.Sprint(introStr))
 
+	if gui.git.Sync.GitCommon.IsSvnRepo() {
+		fmt.Fprintln(gui.Views.Extras, "Is a Git-SVN repository: Pull=rebase | Push=dcommit")
+	} else {
+		fmt.Fprintln(gui.Views.Extras, "Is a Git repository")
+	}
+
 	if gui.c.UserConfig().Gui.ShowRandomTip {
 		fmt.Fprintf(
 			gui.Views.Extras,

pkg/gui/controllers/sync_controller.go

@@ -175,6 +175,12 @@ func (self *SyncController) pullWithLock(task gocui.Task, opts PullFilesOptions)
 		},
 	)
 
+	if self.c.Git().Sync.GitCommon.IsSvnRepo() {
+		if err != nil {
+			return fmt.Errorf("Git-SVN rebase failed: %w", err)
+		}
+	}
+
 	return self.c.Helpers().MergeAndRebase.CheckMergeOrRebase(err)
 }
 
@@ -195,6 +201,12 @@ type pushOpts struct {
 func (self *SyncController) pushAux(currentBranch *models.Branch, opts pushOpts) error {
 	return self.c.WithInlineStatus(currentBranch, types.ItemOperationPushing, context.LOCAL_BRANCHES_CONTEXT_KEY, func(task gocui.Task) error {
 		self.c.LogAction(self.c.Tr.Actions.Push)
+
+		if self.c.Git().Sync.GitCommon.IsSvnRepo() {
+			opts.force = false
+			opts.forceWithLease = false
+		}
+
 		err := self.c.Git().Sync.Push(
 			task,
 			git_commands.PushOpts{
@@ -206,6 +218,10 @@ func (self *SyncController) pushAux(currentBranch *models.Branch, opts pushOpts)
 				SetUpstream:    opts.setUpstream,
 			})
 		if err != nil {
+			if self.c.Git().Sync.GitCommon.IsSvnRepo() {
+				return fmt.Errorf("Git-SVN dcommit failed: %w", err)
+			}
+
 			if !opts.force && !opts.forceWithLease && strings.Contains(err.Error(), "Updates were rejected") {
 				if opts.remoteBranchStoredLocally {
 					return errors.New(self.c.Tr.UpdatesRejected)