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Abort merge if head has been updated before pressing merge (#18032)
* Abort merge if head has been updated before pressing merge It is possible that a PR head may be pushed to between the merge page being shown and the merge button being pressed. Pass the current expected head in as a parameter and cancel the merge if it has changed. Fix #18028 Signed-off-by: Andrew Thornton <art27@cantab.net> * adjust swagger Signed-off-by: Andrew Thornton <art27@cantab.net> * fix test Signed-off-by: Andrew Thornton <art27@cantab.net> * placate lint Signed-off-by: Andrew Thornton <art27@cantab.net>
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9 changed files with 42 additions and 9 deletions
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@ -241,11 +241,11 @@ func TestCantMergeConflict(t *testing.T) {
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gitRepo, err := git.OpenRepository(repo_model.RepoPath(user1.Name, repo1.Name))
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assert.NoError(t, err)
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err = pull.Merge(pr, user1, gitRepo, repo_model.MergeStyleMerge, "CONFLICT")
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err = pull.Merge(pr, user1, gitRepo, repo_model.MergeStyleMerge, "", "CONFLICT")
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assert.Error(t, err, "Merge should return an error due to conflict")
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assert.True(t, models.IsErrMergeConflicts(err), "Merge error is not a conflict error")
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err = pull.Merge(pr, user1, gitRepo, repo_model.MergeStyleRebase, "CONFLICT")
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err = pull.Merge(pr, user1, gitRepo, repo_model.MergeStyleRebase, "", "CONFLICT")
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assert.Error(t, err, "Merge should return an error due to conflict")
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assert.True(t, models.IsErrRebaseConflicts(err), "Merge error is not a conflict error")
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gitRepo.Close()
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@ -329,7 +329,7 @@ func TestCantMergeUnrelated(t *testing.T) {
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BaseBranch: "base",
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}).(*models.PullRequest)
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err = pull.Merge(pr, user1, gitRepo, repo_model.MergeStyleMerge, "UNRELATED")
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err = pull.Merge(pr, user1, gitRepo, repo_model.MergeStyleMerge, "", "UNRELATED")
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assert.Error(t, err, "Merge should return an error due to unrelated")
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assert.True(t, models.IsErrMergeUnrelatedHistories(err), "Merge error is not a unrelated histories error")
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gitRepo.Close()
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@ -1506,6 +1506,7 @@ pulls.rebase_conflict_summary = Error Message
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; </summary><code>%[2]s<br>%[3]s</code></details>
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pulls.unrelated_histories = Merge Failed: The merge head and base do not share a common history. Hint: Try a different strategy
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pulls.merge_out_of_date = Merge Failed: Whilst generating the merge, the base was updated. Hint: Try again.
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pulls.head_out_of_date = Merge Failed: Whilst generating the merge, the head was updated. Hint: Try again.
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pulls.push_rejected = Merge Failed: The push was rejected. Review the githooks for this repository.
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pulls.push_rejected_summary = Full Rejection Message
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pulls.push_rejected_no_message = Merge Failed: The push was rejected but there was no remote message.<br>Review the githooks for this repository
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@ -838,7 +838,7 @@ func MergePullRequest(ctx *context.APIContext) {
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message += "\n\n" + form.MergeMessageField
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}
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if err := pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), message); err != nil {
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if err := pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), form.HeadCommitID, message); err != nil {
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if models.IsErrInvalidMergeStyle(err) {
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ctx.Error(http.StatusMethodNotAllowed, "Invalid merge style", fmt.Errorf("%s is not allowed an allowed merge style for this repository", repo_model.MergeStyle(form.Do)))
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return
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@ -854,6 +854,9 @@ func MergePullRequest(ctx *context.APIContext) {
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} else if git.IsErrPushOutOfDate(err) {
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ctx.Error(http.StatusConflict, "Merge", "merge push out of date")
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return
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} else if models.IsErrSHADoesNotMatch(err) {
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ctx.Error(http.StatusConflict, "Merge", "head out of date")
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return
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} else if git.IsErrPushRejected(err) {
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errPushRej := err.(*git.ErrPushRejected)
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if len(errPushRej.Message) == 0 {
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@ -933,7 +933,7 @@ func MergePullRequest(ctx *context.Context) {
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return
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}
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if err = pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), message); err != nil {
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if err = pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), form.HeadCommitID, message); err != nil {
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if models.IsErrInvalidMergeStyle(err) {
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ctx.Flash.Error(ctx.Tr("repo.pulls.invalid_merge_option"))
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ctx.Redirect(issue.Link())
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@ -976,6 +976,11 @@ func MergePullRequest(ctx *context.Context) {
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ctx.Flash.Error(ctx.Tr("repo.pulls.merge_out_of_date"))
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ctx.Redirect(issue.Link())
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return
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} else if models.IsErrSHADoesNotMatch(err) {
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log.Debug("MergeHeadOutOfDate error: %v", err)
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ctx.Flash.Error(ctx.Tr("repo.pulls.head_out_of_date"))
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ctx.Redirect(issue.Link())
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return
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} else if git.IsErrPushRejected(err) {
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log.Debug("MergePushRejected error: %v", err)
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pushrejErr := err.(*git.ErrPushRejected)
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@ -571,6 +571,7 @@ type MergePullRequestForm struct {
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MergeTitleField string
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MergeMessageField string
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MergeCommitID string // only used for manually-merged
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HeadCommitID string `json:"head_commit_id,omitempty"`
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ForceMerge *bool `json:"force_merge,omitempty"`
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DeleteBranchAfterMerge bool `json:"delete_branch_after_merge,omitempty"`
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}
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@ -34,7 +34,7 @@ import (
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// Merge merges pull request to base repository.
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// Caller should check PR is ready to be merged (review and status checks)
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// FIXME: add repoWorkingPull make sure two merges does not happen at same time.
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func Merge(pr *models.PullRequest, doer *user_model.User, baseGitRepo *git.Repository, mergeStyle repo_model.MergeStyle, message string) (err error) {
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func Merge(pr *models.PullRequest, doer *user_model.User, baseGitRepo *git.Repository, mergeStyle repo_model.MergeStyle, expectedHeadCommitID, message string) (err error) {
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if err = pr.LoadHeadRepo(); err != nil {
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log.Error("LoadHeadRepo: %v", err)
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return fmt.Errorf("LoadHeadRepo: %v", err)
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@ -59,7 +59,7 @@ func Merge(pr *models.PullRequest, doer *user_model.User, baseGitRepo *git.Repos
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go AddTestPullRequestTask(doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "")
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}()
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pr.MergedCommitID, err = rawMerge(pr, doer, mergeStyle, message)
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pr.MergedCommitID, err = rawMerge(pr, doer, mergeStyle, expectedHeadCommitID, message)
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if err != nil {
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return err
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}
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@ -114,7 +114,7 @@ func Merge(pr *models.PullRequest, doer *user_model.User, baseGitRepo *git.Repos
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}
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// rawMerge perform the merge operation without changing any pull information in database
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func rawMerge(pr *models.PullRequest, doer *user_model.User, mergeStyle repo_model.MergeStyle, message string) (string, error) {
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func rawMerge(pr *models.PullRequest, doer *user_model.User, mergeStyle repo_model.MergeStyle, expectedHeadCommitID, message string) (string, error) {
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err := git.LoadGitVersion()
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if err != nil {
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log.Error("git.LoadGitVersion: %v", err)
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@ -137,6 +137,20 @@ func rawMerge(pr *models.PullRequest, doer *user_model.User, mergeStyle repo_mod
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trackingBranch := "tracking"
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stagingBranch := "staging"
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if expectedHeadCommitID != "" {
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trackingCommitID, err := git.NewCommand("show-ref", "--hash", git.BranchPrefix+trackingBranch).RunInDir(tmpBasePath)
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if err != nil {
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log.Error("show-ref[%s] --hash refs/heads/trackingn: %v", tmpBasePath, git.BranchPrefix+trackingBranch, err)
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return "", fmt.Errorf("getDiffTree: %v", err)
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}
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if strings.TrimSpace(trackingCommitID) != expectedHeadCommitID {
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return "", models.ErrSHADoesNotMatch{
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GivenSHA: expectedHeadCommitID,
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CurrentSHA: trackingCommitID,
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}
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}
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}
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var outbuf, errbuf strings.Builder
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// Enable sparse-checkout
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@ -55,7 +55,7 @@ func Update(pull *models.PullRequest, doer *user_model.User, message string, reb
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return fmt.Errorf("HeadBranch of PR %d is up to date", pull.Index)
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}
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_, err = rawMerge(pr, doer, style, message)
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_, err = rawMerge(pr, doer, style, "", message)
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defer func() {
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if rebase {
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@ -327,6 +327,7 @@
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<div class="ui form merge-fields" style="display: none">
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<form action="{{.Link}}/merge" method="post">
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{{.CsrfTokenHtml}}
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<input type="hidden" name="head_commit_id" value="{{.PullHeadCommitID}}">
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<div class="field">
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<input type="text" name="merge_title_field" value="{{.Issue.PullRequest.GetDefaultMergeMessage}}">
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</div>
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@ -352,6 +353,7 @@
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<div class="ui form rebase-fields" style="display: none">
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<form action="{{.Link}}/merge" method="post">
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{{.CsrfTokenHtml}}
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<input type="hidden" name="head_commit_id" value="{{.PullHeadCommitID}}">
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<button class="ui green button" type="submit" name="do" value="rebase">
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{{$.i18n.Tr "repo.pulls.rebase_merge_pull_request"}}
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</button>
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@ -371,6 +373,7 @@
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<div class="ui form rebase-merge-fields" style="display: none">
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<form action="{{.Link}}/merge" method="post">
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{{.CsrfTokenHtml}}
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<input type="hidden" name="head_commit_id" value="{{.PullHeadCommitID}}">
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<div class="field">
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<input type="text" name="merge_title_field" value="{{.Issue.PullRequest.GetDefaultMergeMessage}}">
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</div>
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@ -396,6 +399,7 @@
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<div class="ui form squash-fields" style="display: none">
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<form action="{{.Link}}/merge" method="post">
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{{.CsrfTokenHtml}}
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<input type="hidden" name="head_commit_id" value="{{.PullHeadCommitID}}">
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<div class="field">
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<input type="text" name="merge_title_field" value="{{.Issue.PullRequest.GetDefaultSquashMessage}}">
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</div>
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@ -421,6 +425,7 @@
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<div class="ui form manually-merged-fields" style="display: none">
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<form action="{{.Link}}/merge" method="post">
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{{.CsrfTokenHtml}}
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<input type="hidden" name="head_commit_id" value="{{.PullHeadCommitID}}">
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<div class="field">
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<input type="text" name="merge_commit_id" placeholder="{{$.i18n.Tr "repo.pulls.merge_commit_id"}}">
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</div>
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@ -15674,6 +15674,10 @@
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"force_merge": {
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"type": "boolean",
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"x-go-name": "ForceMerge"
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},
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"head_commit_id": {
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"type": "string",
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"x-go-name": "HeadCommitID"
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}
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},
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"x-go-name": "MergePullRequestForm",
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