Revert "remove old rebase code now that we're only ever interactively rebasing"

This reverts commit 1a19b1412d3da03992403cf62fddf06031de2927.

pkg/commands/git.go

@@ -419,9 +419,22 @@ func (c *GitCommand) IsInMergeState() (bool, error) {
 	return strings.Contains(output, "conclude merge") || strings.Contains(output, "unmerged paths"), nil
 }
 
-// IsInRebasingState tells us if we are rebasing
-func (c *GitCommand) IsInRebasingState() (bool, error) {
-	return c.OSCommand.FileExists(".git/rebase-merge")
+// RebaseMode returns "" for non-rebase mode, "normal" for normal rebase
+// and "interactive" for interactive rebase
+func (c *GitCommand) RebaseMode() (string, error) {
+	exists, err := c.OSCommand.FileExists(".git/rebase-apply")
+	if err != nil {
+		return "", err
+	}
+	if exists {
+		return "normal", nil
+	}
+	exists, err = c.OSCommand.FileExists(".git/rebase-merge")
+	if exists {
+		return "interactive", err
+	} else {
+		return "", err
+	}
 }
 
 // RemoveFile directly

pkg/git/commit_list_builder.go

@@ -3,6 +3,9 @@ package git
 import (
 	"fmt"
 	"io/ioutil"
+	"os"
+	"path/filepath"
+	"regexp"
 	"strings"
 
 	"github.com/fatih/color"
@@ -45,13 +48,13 @@ func NewCommitListBuilder(log *logrus.Entry, gitCommand *commands.GitCommand, os
 func (c *CommitListBuilder) GetCommits() ([]*commands.Commit, error) {
 	commits := []*commands.Commit{}
 	var rebasingCommits []*commands.Commit
-	isRebasing, err := c.GitCommand.IsInRebasingState()
+	rebaseMode, err := c.GitCommand.RebaseMode()
 	if err != nil {
 		return nil, err
 	}
-	if isRebasing {
+	if rebaseMode != "" {
 		// here we want to also prepend the commits that we're in the process of rebasing
-		rebasingCommits, err = c.getRebasingCommits()
+		rebasingCommits, err = c.getRebasingCommits(rebaseMode)
 		if err != nil {
 			return nil, err
 		}
@@ -76,7 +79,7 @@ func (c *CommitListBuilder) GetCommits() ([]*commands.Commit, error) {
 			DisplayString: strings.Join(splitLine, " "),
 		})
 	}
-	if isRebasing {
+	if rebaseMode != "" {
 		currentCommit := commits[len(rebasingCommits)]
 		blue := color.New(color.FgYellow)
 		youAreHere := blue.Sprintf("<-- %s ---", c.Tr.SLocalize("YouAreHere"))
@@ -96,6 +99,59 @@ func (c *CommitListBuilder) GetCommits() ([]*commands.Commit, error) {
 	return commits, nil
 }
 
+// getRebasingCommits obtains the commits that we're in the process of rebasing
+func (c *CommitListBuilder) getRebasingCommits(rebaseMode string) ([]*commands.Commit, error) {
+	switch rebaseMode {
+	case "normal":
+		return c.getNormalRebasingCommits()
+	case "interactive":
+		return c.getInteractiveRebasingCommits()
+	default:
+		return nil, nil
+	}
+}
+
+func (c *CommitListBuilder) getNormalRebasingCommits() ([]*commands.Commit, error) {
+	rewrittenCount := 0
+	bytesContent, err := ioutil.ReadFile(".git/rebase-apply/rewritten")
+	if err == nil {
+		content := string(bytesContent)
+		rewrittenCount = len(strings.Split(content, "\n"))
+	}
+
+	// we know we're rebasing, so lets get all the files whose names have numbers
+	commits := []*commands.Commit{}
+	err = filepath.Walk(".git/rebase-apply", func(path string, f os.FileInfo, err error) error {
+		if rewrittenCount > 0 {
+			rewrittenCount--
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		re := regexp.MustCompile(`^\d+$`)
+		if !re.MatchString(f.Name()) {
+			return nil
+		}
+		bytesContent, err := ioutil.ReadFile(path)
+		if err != nil {
+			return err
+		}
+		content := string(bytesContent)
+		commit, err := c.commitFromPatch(content)
+		if err != nil {
+			return err
+		}
+		commits = append([]*commands.Commit{commit}, commits...)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return commits, nil
+}
+
 // git-rebase-todo example:
 // pick ac446ae94ee560bdb8d1d057278657b251aaef17 ac446ae
 // pick afb893148791a2fbd8091aeb81deba4930c73031 afb8931
@@ -105,10 +161,10 @@ func (c *CommitListBuilder) GetCommits() ([]*commands.Commit, error) {
 // pick ac446ae94ee560bdb8d1d057278657b251aaef17 blah  commit on master
 // pick afb893148791a2fbd8091aeb81deba4930c73031 fourth commit on master
 
-// getRebasingCommits takes our git-rebase-todo and our git-rebase-todo.backup files
+// getInteractiveRebasingCommits takes our git-rebase-todo and our git-rebase-todo.backup files
 // and extracts out the sha and names of commits that we still have to go
 // in the rebase:
-func (c *CommitListBuilder) getRebasingCommits() ([]*commands.Commit, error) {
+func (c *CommitListBuilder) getInteractiveRebasingCommits() ([]*commands.Commit, error) {
 	bytesContent, err := ioutil.ReadFile(".git/rebase-merge/git-rebase-todo")
 	if err != nil {
 		c.Log.Info(fmt.Sprintf("error occured reading git-rebase-todo: %s", err.Error()))
@@ -134,6 +190,22 @@ func (c *CommitListBuilder) getRebasingCommits() ([]*commands.Commit, error) {
 	return nil, nil
 }
 
+// assuming the file starts like this:
+// From e93d4193e6dd45ca9cf3a5a273d7ba6cd8b8fb20 Mon Sep 17 00:00:00 2001
+// From: Lazygit Tester <test@example.com>
+// Date: Wed, 5 Dec 2018 21:03:23 +1100
+// Subject: second commit on master
+func (c *CommitListBuilder) commitFromPatch(content string) (*commands.Commit, error) {
+	lines := strings.Split(content, "\n")
+	sha := strings.Split(lines[0], " ")[1][0:7]
+	name := strings.TrimPrefix(lines[3], "Subject: ")
+	return &commands.Commit{
+		Sha:    sha,
+		Name:   name,
+		Status: "rebasing",
+	}, nil
+}
+
 func (c *CommitListBuilder) setCommitMergedStatuses(commits []*commands.Commit) ([]*commands.Commit, error) {
 	ancestor, err := c.getMergeBase()
 	if err != nil {

pkg/gui/status_panel.go

@@ -101,14 +101,14 @@ func (gui *Gui) updateWorkTreeState() error {
 		gui.State.WorkingTreeState = "merging"
 		return nil
 	}
-	isRebasing, err := gui.GitCommand.IsInRebasingState()
+	rebaseMode, err := gui.GitCommand.RebaseMode()
 	if err != nil {
 		return err
 	}
-	if isRebasing {
+	if rebaseMode != "" {
 		gui.State.WorkingTreeState = "rebasing"
-	} else {
-		gui.State.WorkingTreeState = "normal"
+		return nil
 	}
+	gui.State.WorkingTreeState = "normal"
 	return nil
 }