Add rebase with merge commit merge style (#3844) (#4052)

Signed-off-by: Julian Tölle <julian.toelle97@gmail.com>

integrations/pull_merge_test.go

@@ -77,6 +77,19 @@ func TestPullRebase(t *testing.T) {
 	testPullMerge(t, session, elem[1], elem[2], elem[4], models.MergeStyleRebase)
 }
 
+func TestPullRebaseMerge(t *testing.T) {
+	prepareTestEnv(t)
+	session := loginUser(t, "user1")
+	testRepoFork(t, session, "user2", "repo1", "user1", "repo1")
+	testEditFile(t, session, "user1", "repo1", "master", "README.md", "Hello, World (Edited)\n")
+
+	resp := testPullCreate(t, session, "user1", "repo1", "master", "This is a pull title")
+
+	elem := strings.Split(test.RedirectURL(resp), "/")
+	assert.EqualValues(t, "pulls", elem[3])
+	testPullMerge(t, session, elem[1], elem[2], elem[4], models.MergeStyleRebaseMerge)
+}
+
 func TestPullSquash(t *testing.T) {
 	prepareTestEnv(t)
 	session := loginUser(t, "user1")

models/fixtures/repo_unit.yml

@@ -30,7 +30,7 @@
   id: 5
   repo_id: 1
   type: 3
-  config: "{\"IgnoreWhitespaceConflicts\":false,\"AllowMerge\":true,\"AllowRebase\":true,\"AllowSquash\":true}"
+  config: "{\"IgnoreWhitespaceConflicts\":false,\"AllowMerge\":true,\"AllowRebase\":true,\"AllowRebaseMerge\":true,\"AllowSquash\":true}"
   created_unix: 946684810
 
 -
@@ -51,7 +51,7 @@
   id: 8
   repo_id: 3
   type: 3
-  config: "{\"IgnoreWhitespaceConflicts\":true,\"AllowMerge\":true,\"AllowRebase\":false,\"AllowSquash\":false}"
+  config: "{\"IgnoreWhitespaceConflicts\":true,\"AllowMerge\":true,\"AllowRebase\":false,\"AllowRebaseMerge\":true,\"AllowSquash\":false}"
   created_unix: 946684810
 
 -

models/migrations/migrations.go

@@ -204,6 +204,8 @@ var migrations = []Migration{
 	NewMigration("add approval whitelists to protected branches", addApprovalWhitelistsToProtectedBranches),
 	// v75 -> v76
 	NewMigration("clear nonused data which not deleted when user was deleted", clearNonusedData),
+	// v76 -> v77
+	NewMigration("add pull request rebase with merge commit", addPullRequestRebaseWithMerge),
 }
 
 // Migrate database to current version

models/migrations/v76.go

@@ -0,0 +1,63 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migrations
+
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/modules/util"
+
+	"github.com/go-xorm/xorm"
+)
+
+func addPullRequestRebaseWithMerge(x *xorm.Engine) error {
+	// RepoUnit describes all units of a repository
+	type RepoUnit struct {
+		ID          int64
+		RepoID      int64                  `xorm:"INDEX(s)"`
+		Type        int                    `xorm:"INDEX(s)"`
+		Config      map[string]interface{} `xorm:"JSON"`
+		CreatedUnix util.TimeStamp         `xorm:"INDEX CREATED"`
+	}
+
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	//Updating existing issue units
+	units := make([]*RepoUnit, 0, 100)
+	if err := sess.Where("`type` = ?", V16UnitTypePRs).Find(&units); err != nil {
+		return fmt.Errorf("Query repo units: %v", err)
+	}
+	for _, unit := range units {
+		if unit.Config == nil {
+			unit.Config = make(map[string]interface{})
+		}
+		// Allow the new merge style if all other merge styles are allowed
+		allowMergeRebase := true
+
+		if allowMerge, ok := unit.Config["AllowMerge"]; ok {
+			allowMergeRebase = allowMergeRebase && allowMerge.(bool)
+		}
+
+		if allowRebase, ok := unit.Config["AllowRebase"]; ok {
+			allowMergeRebase = allowMergeRebase && allowRebase.(bool)
+		}
+
+		if allowSquash, ok := unit.Config["AllowSquash"]; ok {
+			allowMergeRebase = allowMergeRebase && allowSquash.(bool)
+		}
+
+		if _, ok := unit.Config["AllowRebaseMerge"]; !ok {
+			unit.Config["AllowRebaseMerge"] = allowMergeRebase
+		}
+		if _, err := sess.ID(unit.ID).Cols("config").Update(unit); err != nil {
+			return err
+		}
+	}
+	return sess.Commit()
+}

models/pull.go

@@ -297,6 +297,8 @@ const (
 	MergeStyleMerge MergeStyle = "merge"
 	// MergeStyleRebase rebase before merging
 	MergeStyleRebase MergeStyle = "rebase"
+	// MergeStyleRebaseMerge rebase before merging with merge commit (--no-ff)
+	MergeStyleRebaseMerge MergeStyle = "rebase-merge"
 	// MergeStyleSquash squash commits into single commit before merging
 	MergeStyleSquash MergeStyle = "squash"
 )
@@ -434,6 +436,41 @@ func (pr *PullRequest) Merge(doer *User, baseGitRepo *git.Repository, mergeStyle
 			"git", "merge", "--ff-only", "-q", "head_repo_"+pr.HeadBranch); err != nil {
 			return fmt.Errorf("git merge --ff-only [%s -> %s]: %s", headRepoPath, tmpBasePath, stderr)
 		}
+	case MergeStyleRebaseMerge:
+		// Checkout head branch
+		if _, stderr, err = process.GetManager().ExecDir(-1, tmpBasePath,
+			fmt.Sprintf("PullRequest.Merge (git checkout): %s", tmpBasePath),
+			"git", "checkout", "-b", "head_repo_"+pr.HeadBranch, "head_repo/"+pr.HeadBranch); err != nil {
+			return fmt.Errorf("git checkout: %s", stderr)
+		}
+		// Rebase before merging
+		if _, stderr, err = process.GetManager().ExecDir(-1, tmpBasePath,
+			fmt.Sprintf("PullRequest.Merge (git rebase): %s", tmpBasePath),
+			"git", "rebase", "-q", pr.BaseBranch); err != nil {
+			return fmt.Errorf("git rebase [%s -> %s]: %s", headRepoPath, tmpBasePath, stderr)
+		}
+		// Checkout base branch again
+		if _, stderr, err = process.GetManager().ExecDir(-1, tmpBasePath,
+			fmt.Sprintf("PullRequest.Merge (git checkout): %s", tmpBasePath),
+			"git", "checkout", pr.BaseBranch); err != nil {
+			return fmt.Errorf("git checkout: %s", stderr)
+		}
+		// Prepare merge with commit
+		if _, stderr, err = process.GetManager().ExecDir(-1, tmpBasePath,
+			fmt.Sprintf("PullRequest.Merge (git merge): %s", tmpBasePath),
+			"git", "merge", "--no-ff", "--no-commit", "-q", "head_repo_"+pr.HeadBranch); err != nil {
+			return fmt.Errorf("git merge --no-ff [%s -> %s]: %s", headRepoPath, tmpBasePath, stderr)
+		}
+
+		// Set custom message and author and create merge commit
+		sig := doer.NewGitSig()
+		if _, stderr, err = process.GetManager().ExecDir(-1, tmpBasePath,
+			fmt.Sprintf("PullRequest.Merge (git commit): %s", tmpBasePath),
+			"git", "commit", fmt.Sprintf("--author='%s <%s>'", sig.Name, sig.Email),
+			"-m", message); err != nil {
+			return fmt.Errorf("git commit [%s]: %v - %s", tmpBasePath, err, stderr)
+		}
+
 	case MergeStyleSquash:
 		// Merge with squash
 		if _, stderr, err = process.GetManager().ExecDir(-1, tmpBasePath,

models/repo.go

@@ -1298,7 +1298,7 @@ func createRepository(e *xorm.Session, doer, u *User, repo *Repository) (err err
 			units = append(units, RepoUnit{
 				RepoID: repo.ID,
 				Type:   tp,
-				Config: &PullRequestsConfig{AllowMerge: true, AllowRebase: true, AllowSquash: true},
+				Config: &PullRequestsConfig{AllowMerge: true, AllowRebase: true, AllowRebaseMerge: true, AllowSquash: true},
 			})
 		} else {
 			units = append(units, RepoUnit{

models/repo_unit.go

@@ -91,6 +91,7 @@ type PullRequestsConfig struct {
 	IgnoreWhitespaceConflicts bool
 	AllowMerge                bool
 	AllowRebase               bool
+	AllowRebaseMerge          bool
 	AllowSquash               bool
 }
 
@@ -108,6 +109,7 @@ func (cfg *PullRequestsConfig) ToDB() ([]byte, error) {
 func (cfg *PullRequestsConfig) IsMergeStyleAllowed(mergeStyle MergeStyle) bool {
 	return mergeStyle == MergeStyleMerge && cfg.AllowMerge ||
 		mergeStyle == MergeStyleRebase && cfg.AllowRebase ||
+		mergeStyle == MergeStyleRebaseMerge && cfg.AllowRebaseMerge ||
 		mergeStyle == MergeStyleSquash && cfg.AllowSquash
 }
 

modules/auth/repo_form.go

@@ -112,6 +112,7 @@ type RepoSettingForm struct {
 	PullsIgnoreWhitespace            bool
 	PullsAllowMerge                  bool
 	PullsAllowRebase                 bool
+	PullsAllowRebaseMerge            bool
 	PullsAllowSquash                 bool
 	EnableTimetracker                bool
 	AllowOnlyContributorsToTrackTime bool
@@ -363,7 +364,7 @@ func (f *InitializeLabelsForm) Validate(ctx *macaron.Context, errs binding.Error
 
 // MergePullRequestForm form for merging Pull Request
 type MergePullRequestForm struct {
-	Do                string `binding:"Required;In(merge,rebase,squash)"`
+	Do                string `binding:"Required;In(merge,rebase,rebase-merge,squash)"`
 	MergeTitleField   string
 	MergeMessageField string
 }

options/locale/locale_en-US.ini

@@ -868,6 +868,7 @@ pulls.no_merge_helper = Enable merge options in the repository settings or merge
 pulls.no_merge_wip = This pull request can not be merged because it is marked as being a work in progress.
 pulls.merge_pull_request = Merge Pull Request
 pulls.rebase_merge_pull_request = Rebase and Merge
+pulls.rebase_merge_commit_pull_request = Rebase and Merge (--no-ff)
 pulls.squash_merge_pull_request = Squash and Merge
 pulls.invalid_merge_option = You cannot use this merge option for this pull request.
 pulls.open_unmerged_pull_exists = `You cannot perform a reopen operation because there is a pending pull request (#%d) with identical properties.`
@@ -1013,6 +1014,7 @@ settings.pulls_desc = Enable Repository Pull Requests
 settings.pulls.ignore_whitespace = Ignore Whitespace for Conflicts
 settings.pulls.allow_merge_commits = Enable Commit Merging
 settings.pulls.allow_rebase_merge = Enable Rebasing to Merge Commits
+settings.pulls.allow_rebase_merge_commit = Enable Rebasing with explicit merge commits (--no-ff)
 settings.pulls.allow_squash_commits = Enable Squashing to Merge Commits
 settings.admin_settings = Administrator Settings
 settings.admin_enable_health_check = Enable Repository Health Checks (git fsck)

routers/repo/issue.go

@@ -843,6 +843,8 @@ func ViewIssue(ctx *context.Context) {
 				ctx.Data["MergeStyle"] = models.MergeStyleMerge
 			} else if prConfig.AllowRebase {
 				ctx.Data["MergeStyle"] = models.MergeStyleRebase
+			} else if prConfig.AllowRebaseMerge {
+				ctx.Data["MergeStyle"] = models.MergeStyleRebaseMerge
 			} else if prConfig.AllowSquash {
 				ctx.Data["MergeStyle"] = models.MergeStyleSquash
 			} else {

routers/repo/pull.go

@@ -552,6 +552,9 @@ func MergePullRequest(ctx *context.Context, form auth.MergePullRequestForm) {
 		if models.MergeStyle(form.Do) == models.MergeStyleMerge {
 			message = pr.GetDefaultMergeMessage()
 		}
+		if models.MergeStyle(form.Do) == models.MergeStyleRebaseMerge {
+			message = pr.GetDefaultMergeMessage()
+		}
 		if models.MergeStyle(form.Do) == models.MergeStyleSquash {
 			message = pr.GetDefaultSquashMessage()
 		}

routers/repo/setting.go

@@ -227,6 +227,7 @@ func SettingsPost(ctx *context.Context, form auth.RepoSettingForm) {
 					IgnoreWhitespaceConflicts: form.PullsIgnoreWhitespace,
 					AllowMerge:                form.PullsAllowMerge,
 					AllowRebase:               form.PullsAllowRebase,
+					AllowRebaseMerge:          form.PullsAllowRebaseMerge,
 					AllowSquash:               form.PullsAllowSquash,
 				},
 			})

templates/repo/issue/view_content/pull.tmpl

@@ -86,7 +86,7 @@
 				</div>
 				{{if .AllowMerge}}
 					{{$prUnit := .Repository.MustGetUnit $.UnitTypePullRequests}}
-					{{if or $prUnit.PullRequestsConfig.AllowMerge $prUnit.PullRequestsConfig.AllowRebase $prUnit.PullRequestsConfig.AllowSquash}}
+					{{if or $prUnit.PullRequestsConfig.AllowMerge $prUnit.PullRequestsConfig.AllowRebase $prUnit.PullRequestsConfig.AllowRebaseMerge $prUnit.PullRequestsConfig.AllowSquash}}
 						<div class="ui divider"></div>
 						{{if $prUnit.PullRequestsConfig.AllowMerge}}
 						<div class="ui form merge-fields" style="display: none">
@@ -120,6 +120,25 @@
 							</form>
 						</div>
 						{{end}}
+						{{if $prUnit.PullRequestsConfig.AllowRebaseMerge}}
+						<div class="ui form rebase-merge-fields" style="display: none">
+							<form action="{{.Link}}/merge" method="post">
+								{{.CsrfTokenHtml}}
+								<div class="field">
+									<input type="text" name="merge_title_field" value="{{.Issue.PullRequest.GetDefaultMergeMessage}}">
+								</div>
+								<div class="field">
+									<textarea name="merge_message_field" rows="5" placeholder="{{$.i18n.Tr "repo.editor.commit_message_desc"}}"></textarea>
+								</div>
+								<button class="ui green button" type="submit" name="do" value="rebase-merge">
+									{{$.i18n.Tr "repo.pulls.rebase_merge_commit_pull_request"}}
+								</button>
+								<button class="ui button merge-cancel">
+									{{$.i18n.Tr "cancel"}}
+								</button>
+							</form>
+						</div>
+						{{end}}
 						{{if $prUnit.PullRequestsConfig.AllowSquash}}
 						<div class="ui form squash-fields" style="display: none">
 							<form action="{{.Link}}/merge" method="post">
@@ -149,6 +168,9 @@
 								{{if eq .MergeStyle "rebase"}}
 									{{$.i18n.Tr "repo.pulls.rebase_merge_pull_request"}}
 								{{end}}
+								{{if eq .MergeStyle "rebase-merge"}}
+									{{$.i18n.Tr "repo.pulls.rebase_merge_commit_pull_request"}}
+								{{end}}
 								{{if eq .MergeStyle "squash"}}
 									{{$.i18n.Tr "repo.pulls.squash_merge_pull_request"}}
 								{{end}}
@@ -163,6 +185,9 @@
 									{{if $prUnit.PullRequestsConfig.AllowRebase}}
 									<div class="item{{if eq .MergeStyle "rebase"}} active selected{{end}}" data-do="rebase">{{$.i18n.Tr "repo.pulls.rebase_merge_pull_request"}}</div>
 									{{end}}
+									{{if $prUnit.PullRequestsConfig.AllowRebaseMerge}}
+									<div class="item{{if eq .MergeStyle "rebase-merge"}} active selected{{end}}" data-do="rebase-merge">{{$.i18n.Tr "repo.pulls.rebase_merge_commit_pull_request"}}</div>
+									{{end}}
 									{{if $prUnit.PullRequestsConfig.AllowSquash}}
 									<div class="item{{if eq .MergeStyle "squash"}} active selected{{end}}" data-do="squash">{{$.i18n.Tr "repo.pulls.squash_merge_pull_request"}}</div>
 									{{end}}

templates/repo/settings/options.tmpl

@@ -227,6 +227,12 @@
 								<label>{{.i18n.Tr "repo.settings.pulls.allow_rebase_merge"}}</label>
 							</div>
 						</div>
+						<div class="field">
+							<div class="ui checkbox">
+								<input name="pulls_allow_rebase_merge" type="checkbox" {{if or (not $pullRequestEnabled) ($prUnit.PullRequestsConfig.AllowRebaseMerge)}}checked{{end}}>
+								<label>{{.i18n.Tr "repo.settings.pulls.allow_rebase_merge_commit"}}</label>
+							</div>
+						</div>
 						<div class="field">
 							<div class="ui checkbox">
 								<input name="pulls_allow_squash" type="checkbox" {{if or (not $pullRequestEnabled) ($prUnit.PullRequestsConfig.AllowSquash)}}checked{{end}}>