more efficient refreshing of rebase commits

pkg/commands/commit_list_builder.go

@@ -28,21 +28,19 @@ const SEPARATION_CHAR = "|"
 
 // CommitListBuilder returns a list of Branch objects for the current repo
 type CommitListBuilder struct {
-	Log                 *logrus.Entry
-	GitCommand          *GitCommand
-	OSCommand           *OSCommand
-	Tr                  *i18n.Localizer
-	CherryPickedCommits []*Commit
+	Log        *logrus.Entry
+	GitCommand *GitCommand
+	OSCommand  *OSCommand
+	Tr         *i18n.Localizer
 }
 
 // NewCommitListBuilder builds a new commit list builder
-func NewCommitListBuilder(log *logrus.Entry, gitCommand *GitCommand, osCommand *OSCommand, tr *i18n.Localizer, cherryPickedCommits []*Commit) *CommitListBuilder {
+func NewCommitListBuilder(log *logrus.Entry, gitCommand *GitCommand, osCommand *OSCommand, tr *i18n.Localizer) *CommitListBuilder {
 	return &CommitListBuilder{
-		Log:                 log,
-		GitCommand:          gitCommand,
-		OSCommand:           osCommand,
-		Tr:                  tr,
-		CherryPickedCommits: cherryPickedCommits,
+		Log:        log,
+		GitCommand: gitCommand,
+		OSCommand:  osCommand,
+		Tr:         tr,
 	}
 }
 
@@ -94,28 +92,53 @@ type GetCommitsOptions struct {
 	RefName              string // e.g. "HEAD" or "my_branch"
 }
 
+func (c *CommitListBuilder) MergeRebasingCommits(commits []*Commit) ([]*Commit, error) {
+	// chances are we have as many commits as last time so we'll set the capacity to be the old length
+	result := make([]*Commit, 0, len(commits))
+	for i, commit := range commits {
+		if commit.Status != "rebasing" { // removing the existing rebase commits so we can add the refreshed ones
+			result = append(result, commits[i:]...)
+			break
+		}
+	}
+
+	rebaseMode, err := c.GitCommand.RebaseMode()
+	if err != nil {
+		return nil, err
+	}
+
+	if rebaseMode == "" {
+		// not in rebase mode so return original commits
+		return result, nil
+	}
+
+	rebasingCommits, err := c.getRebasingCommits(rebaseMode)
+	if err != nil {
+		return nil, err
+	}
+	if len(rebasingCommits) > 0 {
+		result = append(rebasingCommits, result...)
+	}
+
+	return result, nil
+}
+
 // GetCommits obtains the commits of the current branch
 func (c *CommitListBuilder) GetCommits(opts GetCommitsOptions) ([]*Commit, error) {
 	commits := []*Commit{}
 	var rebasingCommits []*Commit
-	rebaseMode := ""
+	rebaseMode, err := c.GitCommand.RebaseMode()
+	if err != nil {
+		return nil, err
+	}
 
-	if opts.IncludeRebaseCommits {
+	if opts.IncludeRebaseCommits && opts.FilterPath == "" {
 		var err error
-		rebaseMode, err = c.GitCommand.RebaseMode()
+		rebasingCommits, err = c.MergeRebasingCommits(commits)
 		if err != nil {
 			return nil, err
 		}
-		if rebaseMode != "" && opts.FilterPath == "" {
-			// here we want to also prepend the commits that we're in the process of rebasing
-			rebasingCommits, err = c.getRebasingCommits(rebaseMode)
-			if err != nil {
-				return nil, err
-			}
-			if len(rebasingCommits) > 0 {
-				commits = append(commits, rebasingCommits...)
-			}
-		}
+		commits = append(commits, rebasingCommits...)
 	}
 
 	passedFirstPushedCommit := false

pkg/commands/commit_list_builder_test.go

@@ -13,11 +13,10 @@ func NewDummyCommitListBuilder() *CommitListBuilder {
 	osCommand := NewDummyOSCommand()
 
 	return &CommitListBuilder{
-		Log:                 NewDummyLog(),
-		GitCommand:          NewDummyGitCommandWithOSCommand(osCommand),
-		OSCommand:           osCommand,
-		Tr:                  i18n.NewLocalizer(NewDummyLog()),
-		CherryPickedCommits: []*Commit{},
+		Log:        NewDummyLog(),
+		GitCommand: NewDummyGitCommandWithOSCommand(osCommand),
+		OSCommand:  osCommand,
+		Tr:         i18n.NewLocalizer(NewDummyLog()),
 	}
 }
 

pkg/gui/commits_panel.go

@@ -97,7 +97,10 @@ func (gui *Gui) refreshCommits() error {
 }
 
 func (gui *Gui) refreshCommitsWithLimit() error {
-	builder := commands.NewCommitListBuilder(gui.Log, gui.GitCommand, gui.OSCommand, gui.Tr, gui.State.Modes.CherryPicking.CherryPickedCommits)
+	gui.State.BranchCommitsMutex.Lock()
+	defer gui.State.BranchCommitsMutex.Unlock()
+
+	builder := commands.NewCommitListBuilder(gui.Log, gui.GitCommand, gui.OSCommand, gui.Tr)
 
 	commits, err := builder.GetCommits(
 		commands.GetCommitsOptions{
@@ -115,6 +118,21 @@ func (gui *Gui) refreshCommitsWithLimit() error {
 	return gui.postRefreshUpdate(gui.Contexts.BranchCommits.Context)
 }
 
+func (gui *Gui) refreshRebaseCommits() error {
+	gui.State.BranchCommitsMutex.Lock()
+	defer gui.State.BranchCommitsMutex.Unlock()
+
+	builder := commands.NewCommitListBuilder(gui.Log, gui.GitCommand, gui.OSCommand, gui.Tr)
+
+	updatedCommits, err := builder.MergeRebasingCommits(gui.State.Commits)
+	if err != nil {
+		return err
+	}
+	gui.State.Commits = updatedCommits
+
+	return gui.postRefreshUpdate(gui.Contexts.BranchCommits.Context)
+}
+
 // specific functions
 
 func (gui *Gui) handleCommitSquashDown(g *gocui.Gui, v *gocui.View) error {
@@ -256,9 +274,8 @@ func (gui *Gui) handleMidRebaseCommand(action string) (bool, error) {
 	if err := gui.GitCommand.EditRebaseTodo(gui.State.Panels.Commits.SelectedLineIdx, action); err != nil {
 		return false, gui.surfaceError(err)
 	}
-	// TODO: consider doing this in a way that is less expensive. We don't actually
-	// need to reload all the commits, just the TODO commits.
-	return true, gui.refreshSidePanels(refreshOptions{scope: []int{COMMITS}})
+
+	return true, gui.refreshRebaseCommits()
 }
 
 func (gui *Gui) handleCommitDelete(g *gocui.Gui, v *gocui.View) error {

pkg/gui/gui.go

@@ -297,6 +297,7 @@ type guiState struct {
 	RefreshingFilesMutex  sync.Mutex
 	RefreshingStatusMutex sync.Mutex
 	FetchMutex            sync.Mutex
+	BranchCommitsMutex    sync.Mutex
 	Searching             searchingState
 	ScreenMode            int
 	SideView              *gocui.View

pkg/gui/sub_commits_panel.go

@@ -77,7 +77,7 @@ func (gui *Gui) handleViewSubCommitFiles() error {
 
 func (gui *Gui) switchToSubCommitsContext(refName string) error {
 	// need to populate my sub commits
-	builder := commands.NewCommitListBuilder(gui.Log, gui.GitCommand, gui.OSCommand, gui.Tr, gui.State.Modes.CherryPicking.CherryPickedCommits)
+	builder := commands.NewCommitListBuilder(gui.Log, gui.GitCommand, gui.OSCommand, gui.Tr)
 
 	commits, err := builder.GetCommits(
 		commands.GetCommitsOptions{