Remove the "Select parent commit" prompt when reverting a merge commit

In pretty much 100% of the cases, you want to use -m1, so spare users the
complexity of a confusing prompt.

See
https://public-inbox.org/git/e60a8b1a-98c8-4ac7-b966-ff9635bb781d@haller-berlin.de/
for some discussion.

pkg/commands/git_commands/commit.go

@@ -285,15 +285,14 @@ func (self *CommitCommands) ShowFileContentCmdObj(hash string, filePath string)
 	return self.cmd.New(cmdArgs).DontLog()
 }
 
-// Revert reverts the selected commit by hash
-func (self *CommitCommands) Revert(hash string) error {
-	cmdArgs := NewGitCmd("revert").Arg(hash).ToArgv()
-
-	return self.cmd.New(cmdArgs).Run()
-}
-
-func (self *CommitCommands) RevertMerge(hash string, parentNumber int) error {
-	cmdArgs := NewGitCmd("revert").Arg(hash, "-m", fmt.Sprintf("%d", parentNumber)).
+// Revert reverts the selected commit by hash. If isMerge is true, we'll pass -m 1
+// to say we want to revert the first parent of the merge commit, which is the one
+// people want in 99.9% of cases. In current git versions we could unconditionally
+// pass -m 1 even for non-merge commits, but older versions of git choke on it.
+func (self *CommitCommands) Revert(hash string, isMerge bool) error {
+	cmdArgs := NewGitCmd("revert").
+		Arg(hash).
+		ArgIf(isMerge, "-m", "1").
 		ToArgv()
 
 	return self.cmd.New(cmdArgs).Run()

pkg/gui/controllers/local_commits_controller.go

@@ -1,7 +1,6 @@
 package controllers
 
 import (
-	"fmt"
 	"strings"
 
 	"github.com/go-errors/errors"
@@ -859,10 +858,6 @@ func (self *LocalCommitsController) addCoAuthor(start, end int) error {
 }
 
 func (self *LocalCommitsController) revert(commit *models.Commit) error {
-	if commit.IsMerge() {
-		return self.createRevertMergeCommitMenu(commit)
-	}
-
 	self.c.Confirm(types.ConfirmOpts{
 		Title: self.c.Tr.Actions.RevertCommit,
 		Prompt: utils.ResolvePlaceholderString(
@@ -873,7 +868,7 @@ func (self *LocalCommitsController) revert(commit *models.Commit) error {
 		HandleConfirm: func() error {
 			self.c.LogAction(self.c.Tr.Actions.RevertCommit)
 			return self.c.WithWaitingStatusSync(self.c.Tr.RevertingStatus, func() error {
-				result := self.c.Git().Commit.Revert(commit.Hash)
+				result := self.c.Git().Commit.Revert(commit.Hash, commit.IsMerge())
 				if err := self.c.Helpers().MergeAndRebase.CheckMergeOrRebase(result); err != nil {
 					return err
 				}
@@ -885,32 +880,6 @@ func (self *LocalCommitsController) revert(commit *models.Commit) error {
 	return nil
 }
 
-func (self *LocalCommitsController) createRevertMergeCommitMenu(commit *models.Commit) error {
-	menuItems := make([]*types.MenuItem, len(commit.Parents))
-	for i, parentHash := range commit.Parents {
-		message, err := self.c.Git().Commit.GetCommitMessageFirstLine(parentHash)
-		if err != nil {
-			return err
-		}
-
-		menuItems[i] = &types.MenuItem{
-			Label: fmt.Sprintf("%s: %s", utils.SafeTruncate(parentHash, 8), message),
-			OnPress: func() error {
-				parentNumber := i + 1
-				self.c.LogAction(self.c.Tr.Actions.RevertCommit)
-				return self.c.WithWaitingStatusSync(self.c.Tr.RevertingStatus, func() error {
-					if err := self.c.Git().Commit.RevertMerge(commit.Hash, parentNumber); err != nil {
-						return err
-					}
-					return self.afterRevertCommit()
-				})
-			},
-		}
-	}
-
-	return self.c.Menu(types.CreateMenuOptions{Title: self.c.Tr.SelectParentCommitForMerge, Items: menuItems})
-}
-
 func (self *LocalCommitsController) afterRevertCommit() error {
 	self.context().MoveSelection(1)
 	return self.c.Refresh(types.RefreshOptions{

pkg/i18n/english.go

@@ -727,7 +727,6 @@ type TranslationSet struct {
 	FocusCommandLog                          string
 	CommandLogHeader                         string
 	RandomTip                                string
-	SelectParentCommitForMerge               string
 	ToggleWhitespaceInDiffView               string
 	ToggleWhitespaceInDiffViewTooltip        string
 	IgnoreWhitespaceDiffViewSubTitle         string
@@ -1795,7 +1794,6 @@ func EnglishTranslationSet() *TranslationSet {
 		FocusCommandLog:                          "Focus command log",
 		CommandLogHeader:                         "You can hide/focus this panel by pressing '%s'\n",
 		RandomTip:                                "Random tip",
-		SelectParentCommitForMerge:               "Select parent commit for merge",
 		ToggleWhitespaceInDiffView:               "Toggle whitespace",
 		ToggleWhitespaceInDiffViewTooltip:        "Toggle whether or not whitespace changes are shown in the diff view.",
 		IgnoreWhitespaceDiffViewSubTitle:         "(ignoring whitespace)",

pkg/integration/tests/commit/revert_merge.go

@@ -21,14 +21,9 @@ var RevertMerge = NewIntegrationTest(NewIntegrationTestArgs{
 			).
 			Press(keys.Commits.RevertCommit)
 
-		t.ExpectPopup().Menu().
-			Title(Equals("Select parent commit for merge")).
-			Lines(
-				Contains("first change"),
-				Contains("second-change-branch unrelated change"),
-				Contains("Cancel"),
-			).
-			Select(Contains("first change")).
+		t.ExpectPopup().Confirmation().
+			Title(Equals("Revert commit")).
+			Content(MatchesRegexp(`Are you sure you want to revert \w+?`)).
 			Confirm()
 
 		t.Views().Commits().IsFocused().