feat: squash merge

docs/Config.md

@@ -283,6 +283,9 @@ git:
     # Extra args passed to `git merge`, e.g. --no-ff
     args: ""
 
+    # The commit message to use for a squash merge commit. Can contain "{{selectedRef}}" and "{{currentBranch}}" placeholders.
+    squashMergeMessage: Squash merge {{selectedRef}} into {{currentBranch}}
+
   # list of branches that are considered 'main' branches, used when displaying commits
   mainBranches:
     - master

docs/keybindings/Keybindings_en.md

@@ -162,7 +162,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` F `` | Force checkout | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | Rebase | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | Merge | Merge selected branch into currently checked out branch. |
+| `` M `` | Merge | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | Fast-forward | Fast-forward selected branch from its upstream. |
 | `` T `` | New tag |  |
 | `` s `` | Sort order |  |
@@ -265,7 +265,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` <c-o> `` | Copy branch name to clipboard |  |
 | `` <space> `` | Checkout | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | New branch |  |
-| `` M `` | Merge | Merge selected branch into currently checked out branch. |
+| `` M `` | Merge | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | Rebase | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | Set the selected remote branch as the upstream of the checked-out branch. |

docs/keybindings/Keybindings_ja.md

@@ -232,7 +232,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` F `` | Force checkout | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | Rebase | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | 現在のブランチにマージ | Merge selected branch into currently checked out branch. |
+| `` M `` | 現在のブランチにマージ | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | Fast-forward | Fast-forward selected branch from its upstream. |
 | `` T `` | タグを作成 |  |
 | `` s `` | 並び替え |  |
@@ -329,7 +329,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` <c-o> `` | ブランチ名をクリップボードにコピー |  |
 | `` <space> `` | チェックアウト | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | 新しいブランチを作成 |  |
-| `` M `` | 現在のブランチにマージ | Merge selected branch into currently checked out branch. |
+| `` M `` | 現在のブランチにマージ | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | Rebase | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | Set the selected remote branch as the upstream of the checked-out branch. |

docs/keybindings/Keybindings_ko.md

@@ -189,7 +189,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
 | `` F `` | 강제 체크아웃 | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | 체크아웃된 브랜치를 이 브랜치에 리베이스 | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | 현재 브랜치에 병합 | Merge selected branch into currently checked out branch. |
+| `` M `` | 현재 브랜치에 병합 | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | Fast-forward this branch from its upstream | Fast-forward selected branch from its upstream. |
 | `` T `` | 태그를 생성 |  |
 | `` s `` | Sort order |  |
@@ -242,7 +242,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
 | `` <c-o> `` | 브랜치명을 클립보드에 복사 |  |
 | `` <space> `` | 체크아웃 | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | 새 브랜치 생성 |  |
-| `` M `` | 현재 브랜치에 병합 | Merge selected branch into currently checked out branch. |
+| `` M `` | 현재 브랜치에 병합 | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | 체크아웃된 브랜치를 이 브랜치에 리베이스 | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | Set the selected remote branch as the upstream of the checked-out branch. |

docs/keybindings/Keybindings_nl.md

@@ -101,7 +101,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
 | `` F `` | Forceer checkout | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | Rebase branch | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | Merge in met huidige checked out branch | Merge selected branch into currently checked out branch. |
+| `` M `` | Merge in met huidige checked out branch | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | Fast-forward deze branch vanaf zijn upstream | Fast-forward selected branch from its upstream. |
 | `` T `` | Creëer tag |  |
 | `` s `` | Sort order |  |
@@ -243,7 +243,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` <c-o> `` | Kopieer branch name naar klembord |  |
 | `` <space> `` | Uitchecken | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | Nieuwe branch |  |
-| `` M `` | Merge in met huidige checked out branch | Merge selected branch into currently checked out branch. |
+| `` M `` | Merge in met huidige checked out branch | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | Rebase branch | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | Stel in als upstream van uitgecheckte branch |

docs/keybindings/Keybindings_ru.md

@@ -189,7 +189,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` F `` | Принудительное переключение | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | Перебазировать переключённую ветку на эту ветку | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | Слияние с текущей переключённой веткой | Merge selected branch into currently checked out branch. |
+| `` M `` | Слияние с текущей переключённой веткой | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | Перемотать эту ветку вперёд из её upstream-ветки | Fast-forward selected branch from its upstream. |
 | `` T `` | Создать тег |  |
 | `` s `` | Порядок сортировки |  |
@@ -299,7 +299,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` <c-o> `` | Скопировать название ветки в буфер обмена |  |
 | `` <space> `` | Переключить | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | Новая ветка |  |
-| `` M `` | Слияние с текущей переключённой веткой | Merge selected branch into currently checked out branch. |
+| `` M `` | Слияние с текущей переключённой веткой | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | Перебазировать переключённую ветку на эту ветку | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | Установить как upstream-ветку переключённую ветку |

docs/keybindings/Keybindings_zh-CN.md

@@ -91,7 +91,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
 | `` F `` | 强制检出 | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | 将已检出的分支变基到该分支 | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | 合并到当前检出的分支 | Merge selected branch into currently checked out branch. |
+| `` M `` | 合并到当前检出的分支 | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | 从上游快进此分支 | Fast-forward selected branch from its upstream. |
 | `` T `` | 创建标签 |  |
 | `` s `` | Sort order |  |
@@ -342,7 +342,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` <c-o> `` | 将分支名称复制到剪贴板 |  |
 | `` <space> `` | 检出 | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | 新分支 |  |
-| `` M `` | 合并到当前检出的分支 | Merge selected branch into currently checked out branch. |
+| `` M `` | 合并到当前检出的分支 | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | 将已检出的分支变基到该分支 | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | 设置为检出分支的上游 |

docs/keybindings/Keybindings_zh-TW.md

@@ -264,7 +264,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` F `` | 強制檢出 | Force checkout selected branch. This will discard all local changes in your working directory before checking out the selected branch. |
 | `` d `` | Delete | View delete options for local/remote branch. |
 | `` r `` | 將已檢出的分支變基至此分支 | Rebase the checked-out branch onto the selected branch. |
-| `` M `` | 合併到當前檢出的分支 | Merge selected branch into currently checked out branch. |
+| `` M `` | 合併到當前檢出的分支 | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` f `` | 從上游快進此分支 | Fast-forward selected branch from its upstream. |
 | `` T `` | 建立標籤 |  |
 | `` s `` | Sort order |  |
@@ -353,7 +353,7 @@ If you would instead like to start an interactive rebase from the selected commi
 | `` <c-o> `` | 複製分支名稱到剪貼簿 |  |
 | `` <space> `` | 檢出 | Checkout a new local branch based on the selected remote branch, or the remote branch as a detached head. |
 | `` n `` | 新分支 |  |
-| `` M `` | 合併到當前檢出的分支 | Merge selected branch into currently checked out branch. |
+| `` M `` | 合併到當前檢出的分支 | View options for merging the selected item into the current branch (regular merge, squash merge) |
 | `` r `` | 將已檢出的分支變基至此分支 | Rebase the checked-out branch onto the selected branch. |
 | `` d `` | Delete | Delete the remote branch from the remote. |
 | `` u `` | Set as upstream | 將此分支設為當前分支之上游 |

pkg/commands/git_commands/branch.go

@@ -216,13 +216,18 @@ func (self *BranchCommands) Rename(oldName string, newName string) error {
 
 type MergeOpts struct {
 	FastForwardOnly bool
+	Squash          bool
 }
 
 func (self *BranchCommands) Merge(branchName string, opts MergeOpts) error {
+	if opts.Squash && opts.FastForwardOnly {
+		panic("Squash and FastForwardOnly can't both be true")
+	}
 	cmdArgs := NewGitCmd("merge").
 		Arg("--no-edit").
 		Arg(strings.Fields(self.UserConfig.Git.Merging.Args)...).
 		ArgIf(opts.FastForwardOnly, "--ff-only").
+		ArgIf(opts.Squash, "--squash", "--ff").
 		Arg(branchName).
 		ToArgv()
 

pkg/config/user_config.go

@@ -285,6 +285,8 @@ type MergingConfig struct {
 	ManualCommit bool `yaml:"manualCommit"`
 	// Extra args passed to `git merge`, e.g. --no-ff
 	Args string `yaml:"args" jsonschema:"example=--no-ff"`
+	// The commit message to use for a squash merge commit. Can contain "{{selectedRef}}" and "{{currentBranch}}" placeholders.
+	SquashMergeMessage string `yaml:"squashMergeMessage"`
 }
 
 type LogConfig struct {
@@ -730,8 +732,9 @@ func GetDefaultConfig() *UserConfig {
 				AutoWrapWidth:         72,
 			},
 			Merging: MergingConfig{
-				ManualCommit: false,
+				ManualCommit:       false,
-				Args:         "",
+				Args:               "",
+				SquashMergeMessage: "Squash merge {{selectedRef}} into {{currentBranch}}",
 			},
 			Log: LogConfig{
 				Order:          "topo-order",

pkg/gui/controllers/branches_controller.go

@@ -111,10 +111,11 @@ func (self *BranchesController) GetKeybindings(opts types.KeybindingsOpts) []*ty
 		{
 			Key:               opts.GetKey(opts.Config.Branches.MergeIntoCurrentBranch),
 			Handler:           opts.Guards.OutsideFilterMode(self.merge),
-			GetDisabledReason: self.require(self.singleItemSelected()),
+			GetDisabledReason: self.require(self.singleItemSelected(self.notMergingIntoYourself)),
 			Description:       self.c.Tr.Merge,
 			Tooltip:           self.c.Tr.MergeBranchTooltip,
 			DisplayOnScreen:   true,
+			OpensMenu:         true,
 		},
 		{
 			Key:               opts.GetKey(opts.Config.Branches.FastForward),
@@ -826,3 +827,14 @@ func (self *BranchesController) branchIsReal(branch *models.Branch) *types.Disab
 
 	return nil
 }
+
+func (self *BranchesController) notMergingIntoYourself(branch *models.Branch) *types.DisabledReason {
+	selectedBranchName := branch.Name
+	checkedOutBranch := self.c.Helpers().Refs.GetCheckedOutRef().Name
+
+	if checkedOutBranch == selectedBranchName {
+		return &types.DisabledReason{Text: self.c.Tr.CantMergeBranchIntoItself}
+	}
+
+	return nil
+}

pkg/gui/controllers/helpers/merge_and_rebase_helper.go

@@ -369,25 +369,84 @@ func (self *MergeAndRebaseHelper) MergeRefIntoCheckedOutBranch(refName string) e
 	if checkedOutBranchName == refName {
 		return errors.New(self.c.Tr.CantMergeBranchIntoItself)
 	}
-	prompt := utils.ResolvePlaceholderString(
-		self.c.Tr.ConfirmMerge,
-		map[string]string{
-			"checkedOutBranch": checkedOutBranchName,
-			"selectedBranch":   refName,
-		},
-	)
 
-	return self.c.Confirm(types.ConfirmOpts{
+	return self.c.Menu(types.CreateMenuOptions{
-		Title:  self.c.Tr.MergeConfirmTitle,
+		Title: self.c.Tr.Merge,
-		Prompt: prompt,
+		Items: []*types.MenuItem{
-		HandleConfirm: func() error {
+			{
-			self.c.LogAction(self.c.Tr.Actions.Merge)
+				Label:   self.c.Tr.RegularMerge,
-			err := self.c.Git().Branch.Merge(refName, git_commands.MergeOpts{})
+				OnPress: self.RegularMerge(refName),
-			return self.CheckMergeOrRebase(err)
+				Key:     'm',
+				Tooltip: utils.ResolvePlaceholderString(
+					self.c.Tr.RegularMergeTooltip,
+					map[string]string{
+						"checkedOutBranch": checkedOutBranchName,
+						"selectedBranch":   refName,
+					},
+				),
+			},
+			{
+				Label:   self.c.Tr.SquashMergeUncommittedTitle,
+				OnPress: self.SquashMergeUncommitted(refName),
+				Key:     's',
+				Tooltip: utils.ResolvePlaceholderString(
+					self.c.Tr.SquashMergeUncommitted,
+					map[string]string{
+						"selectedBranch": refName,
+					},
+				),
+			},
+			{
+				Label:   self.c.Tr.SquashMergeCommittedTitle,
+				OnPress: self.SquashMergeCommitted(refName, checkedOutBranchName),
+				Key:     'S',
+				Tooltip: utils.ResolvePlaceholderString(
+					self.c.Tr.SquashMergeCommitted,
+					map[string]string{
+						"checkedOutBranch": checkedOutBranchName,
+						"selectedBranch":   refName,
+					},
+				),
+			},
 		},
 	})
 }
 
+func (self *MergeAndRebaseHelper) RegularMerge(refName string) func() error {
+	return func() error {
+		self.c.LogAction(self.c.Tr.Actions.Merge)
+		err := self.c.Git().Branch.Merge(refName, git_commands.MergeOpts{})
+		return self.CheckMergeOrRebase(err)
+	}
+}
+
+func (self *MergeAndRebaseHelper) SquashMergeUncommitted(refName string) func() error {
+	return func() error {
+		self.c.LogAction(self.c.Tr.Actions.SquashMerge)
+		err := self.c.Git().Branch.Merge(refName, git_commands.MergeOpts{Squash: true})
+		return self.CheckMergeOrRebase(err)
+	}
+}
+
+func (self *MergeAndRebaseHelper) SquashMergeCommitted(refName, checkedOutBranchName string) func() error {
+	return func() error {
+		self.c.LogAction(self.c.Tr.Actions.SquashMerge)
+		err := self.c.Git().Branch.Merge(refName, git_commands.MergeOpts{Squash: true})
+		if err = self.CheckMergeOrRebase(err); err != nil {
+			return err
+		}
+		message := utils.ResolvePlaceholderString(self.c.UserConfig.Git.Merging.SquashMergeMessage, map[string]string{
+			"selectedRef":   refName,
+			"currentBranch": checkedOutBranchName,
+		})
+		err = self.c.Git().Commit.CommitCmdObj(message, "").Run()
+		if err != nil {
+			return err
+		}
+		return self.c.Refresh(types.RefreshOptions{Mode: types.ASYNC})
+	}
+}
+
 func (self *MergeAndRebaseHelper) ResetMarkedBaseCommit() error {
 	self.c.Modes().MarkedBaseCommit.Reset()
 	return self.c.PostRefreshUpdate(self.c.Contexts().LocalCommits)

pkg/i18n/english.go

@@ -24,7 +24,11 @@ type TranslationSet struct {
 	MainTitle                             string
 	StagingTitle                          string
 	MergingTitle                          string
-	MergeConfirmTitle                     string
+	SquashMergeUncommittedTitle           string
+	SquashMergeCommittedTitle             string
+	SquashMergeUncommitted                string
+	SquashMergeCommitted                  string
+	RegularMergeTooltip                   string
 	NormalTitle                           string
 	LogTitle                              string
 	CommitSummary                         string
@@ -133,6 +137,7 @@ type TranslationSet struct {
 	SureFixupThisCommit                   string
 	SureSquashThisCommit                  string
 	Squash                                string
+	SquashMerge                           string
 	PickCommitTooltip                     string
 	Pick                                  string
 	CantPickDisabledReason                string
@@ -229,6 +234,7 @@ type TranslationSet struct {
 	ExcludeFile                           string
 	RefreshFiles                          string
 	Merge                                 string
+	RegularMerge                          string
 	MergeBranchTooltip                    string
 	ConfirmQuit                           string
 	SwitchRepo                            string
@@ -296,7 +302,6 @@ type TranslationSet struct {
 	InteractiveRebaseTooltip              string
 	RebaseOntoBaseBranchTooltip           string
 	MustSelectTodoCommits                 string
-	ConfirmMerge                          string
 	FwdNoUpstream                         string
 	FwdNoLocalUpstream                    string
 	FwdCommitsToPush                      string
@@ -841,6 +846,7 @@ type Actions struct {
 	DeleteLocalBranch                 string
 	DeleteBranch                      string
 	Merge                             string
+	SquashMerge                       string
 	RebaseBranch                      string
 	RenameBranch                      string
 	CreateBranch                      string
@@ -993,7 +999,8 @@ func EnglishTranslationSet() *TranslationSet {
 		UnstagedChanges:                      "Unstaged changes",
 		StagedChanges:                        "Staged changes",
 		MainTitle:                            "Main",
-		MergeConfirmTitle:                    "Merge",
+		SquashMergeUncommittedTitle:          "Squash merge and leave uncommitted",
+		SquashMergeCommittedTitle:            "Squash merge and commit",
 		StagingTitle:                         "Main panel (staging)",
 		MergingTitle:                         "Main panel (merging)",
 		NormalTitle:                          "Main panel (normal)",
@@ -1105,6 +1112,7 @@ func EnglishTranslationSet() *TranslationSet {
 		SureFixupThisCommit:                  "Are you sure you want to 'fixup' the selected commit(s) into the commit below?",
 		SureSquashThisCommit:                 "Are you sure you want to squash the selected commit(s) into the commit below?",
 		Squash:                               "Squash",
+		SquashMerge:                          "Squash Merge",
 		PickCommitTooltip:                    "Mark the selected commit to be picked (when mid-rebase). This means that the commit will be retained upon continuing the rebase.",
 		Pick:                                 "Pick",
 		CantPickDisabledReason:               "Cannot pick a commit when not mid-rebase",
@@ -1200,7 +1208,8 @@ func EnglishTranslationSet() *TranslationSet {
 		ExcludeFile:                          `Add to .git/info/exclude`,
 		RefreshFiles:                         `Refresh files`,
 		Merge:                                `Merge`,
-		MergeBranchTooltip:                   "Merge selected branch into currently checked out branch.",
+		RegularMerge:                         "Regular merge",
+		MergeBranchTooltip:                   "View options for merging the selected item into the current branch (regular merge, squash merge)",
 		ConfirmQuit:                          `Are you sure you want to quit?`,
 		SwitchRepo:                           `Switch to a recent repo`,
 		AllBranchesLogGraph:                  `Show all branch logs`,
@@ -1271,7 +1280,9 @@ func EnglishTranslationSet() *TranslationSet {
 		InteractiveRebaseTooltip:             "Begin an interactive rebase with a break at the start, so you can update the TODO commits before continuing.",
 		RebaseOntoBaseBranchTooltip:          "Rebase the checked out branch onto its base branch (i.e. the closest main branch).",
 		MustSelectTodoCommits:                "When rebasing, this action only works on a selection of TODO commits.",
-		ConfirmMerge:                         "Are you sure you want to merge '{{.selectedBranch}}' into '{{.checkedOutBranch}}'?",
+		SquashMergeUncommitted:               "Squash merge '{{.selectedBranch}}' into the working tree.",
+		SquashMergeCommitted:                 "Squash merge '{{.selectedBranch}}' into '{{.checkedOutBranch}}' as a single commit.",
+		RegularMergeTooltip:                  "Merge '{{.selectedBranch}}' into '{{.checkedOutBranch}}'.",
 		FwdNoUpstream:                        "Cannot fast-forward a branch with no upstream",
 		FwdNoLocalUpstream:                   "Cannot fast-forward a branch whose remote is not registered locally",
 		FwdCommitsToPush:                     "Cannot fast-forward a branch with commits to push",
@@ -1770,6 +1781,7 @@ func EnglishTranslationSet() *TranslationSet {
 			DeleteLocalBranch:              "Delete local branch",
 			DeleteBranch:                   "Delete branch",
 			Merge:                          "Merge",
+			SquashMerge:                    "Squash merge",
 			RebaseBranch:                   "Rebase branch",
 			RenameBranch:                   "Rename branch",
 			CreateBranch:                   "Create branch",

pkg/integration/tests/branch/squash_merge.go

@@ -0,0 +1,64 @@
+package branch
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var SquashMerge = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Squash merge a branch both with and without committing",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.NewBranch("original-branch").
+			EmptyCommit("one").
+			NewBranch("change-worktree-branch").
+			CreateFileAndAdd("work", "content").
+			Commit("work").
+			Checkout("original-branch").
+			NewBranch("change-commit-branch").
+			CreateFileAndAdd("file", "content").
+			Commit("file").
+			Checkout("original-branch")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().TopLines(
+			Contains("one"),
+		)
+
+		t.Views().Branches().
+			Focus().
+			Lines(
+				Contains("original-branch").IsSelected(),
+				Contains("change-commit-branch"),
+				Contains("change-worktree-branch"),
+			).
+			SelectNextItem().
+			Press(keys.Branches.MergeIntoCurrentBranch)
+
+		t.ExpectPopup().Menu().
+			Title(Equals("Merge")).
+			Select(Contains("Squash merge and commit")).
+			Confirm()
+
+		t.Views().Commits().TopLines(
+			Contains("Squash merge change-commit-branch into original-branch"),
+			Contains("one"),
+		)
+
+		t.Views().Branches().
+			Focus().
+			NavigateToLine(Contains("change-worktree-branch")).
+			Press(keys.Branches.MergeIntoCurrentBranch)
+
+		t.ExpectPopup().Menu().
+			Title(Equals("Merge")).
+			Select(Contains("Squash merge and leave uncommitted")).
+			Confirm()
+
+		t.Views().Files().Focus().Lines(
+			Contains("work"),
+		)
+	},
+})

pkg/integration/tests/test_list.go

@@ -61,6 +61,7 @@ var tests = []*components.IntegrationTest{
 	branch.ShowDivergenceFromUpstream,
 	branch.SortLocalBranches,
 	branch.SortRemoteBranches,
+	branch.SquashMerge,
 	branch.Suggestions,
 	branch.UnsetUpstream,
 	cherry_pick.CherryPick,

pkg/integration/tests/ui/mode_specific_keybinding_suggestions.go

@@ -93,7 +93,7 @@ var ModeSpecificKeybindingSuggestions = NewIntegrationTest(NewIntegrationTestArg
 				t.Views().Options().Content(DoesNotContain(customPatchSuggestion))
 			})
 
-		// Test merge options  suggestion
+		// Test merge options suggestion
 		t.Views().Branches().
 			Focus().
 			NavigateToLine(Contains("first-change-branch")).
@@ -101,9 +101,9 @@ var ModeSpecificKeybindingSuggestions = NewIntegrationTest(NewIntegrationTestArg
 			NavigateToLine(Contains("second-change-branch")).
 			Press(keys.Branches.MergeIntoCurrentBranch).
 			Tap(func() {
-				t.ExpectPopup().Confirmation().
+				t.ExpectPopup().Menu().
 					Title(Equals("Merge")).
-					Content(Contains("Are you sure you want to merge")).
+					Select(Contains("Regular merge")).
 					Confirm()
 
 				t.Common().AcknowledgeConflicts()

schema/config.json

@@ -530,6 +530,11 @@
               "examples": [
                 "--no-ff"
               ]
+            },
+            "squashMergeMessage": {
+              "type": "string",
+              "description": "The commit message to use for a squash merge commit. Can contain \"{{selectedRef}}\" and \"{{currentBranch}}\" placeholders.",
+              "default": "Squash merge {{selectedRef}} into {{currentBranch}}"
             }
           },
           "additionalProperties": false,