mirror of
https://github.com/go-gitea/gitea
synced 2024-08-28 01:56:31 +02:00
Refactor Hash interfaces and centralize hash function. This will allow easier introduction of different hash function later on. This forms the "no-op" part of the SHA256 enablement patch.
532 lines
17 KiB
Go
532 lines
17 KiB
Go
// Copyright 2019 The Gitea Authors.
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// All rights reserved.
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// SPDX-License-Identifier: MIT
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package pull
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/models/db"
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git_model "code.gitea.io/gitea/models/git"
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issues_model "code.gitea.io/gitea/models/issues"
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access_model "code.gitea.io/gitea/models/perm/access"
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pull_model "code.gitea.io/gitea/models/pull"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/models/unit"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/cache"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/references"
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repo_module "code.gitea.io/gitea/modules/repository"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/timeutil"
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issue_service "code.gitea.io/gitea/services/issue"
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notify_service "code.gitea.io/gitea/services/notify"
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)
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// getMergeMessage composes the message used when merging a pull request.
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func getMergeMessage(ctx context.Context, baseGitRepo *git.Repository, pr *issues_model.PullRequest, mergeStyle repo_model.MergeStyle, extraVars map[string]string) (message, body string, err error) {
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if err := pr.LoadBaseRepo(ctx); err != nil {
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return "", "", err
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}
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if err := pr.LoadHeadRepo(ctx); err != nil {
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return "", "", err
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}
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if err := pr.LoadIssue(ctx); err != nil {
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return "", "", err
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}
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if err := pr.Issue.LoadPoster(ctx); err != nil {
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return "", "", err
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}
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isExternalTracker := pr.BaseRepo.UnitEnabled(ctx, unit.TypeExternalTracker)
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issueReference := "#"
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if isExternalTracker {
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issueReference = "!"
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}
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if mergeStyle != "" {
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templateFilepath := fmt.Sprintf(".gitea/default_merge_message/%s_TEMPLATE.md", strings.ToUpper(string(mergeStyle)))
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commit, err := baseGitRepo.GetBranchCommit(pr.BaseRepo.DefaultBranch)
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if err != nil {
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return "", "", err
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}
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templateContent, err := commit.GetFileContent(templateFilepath, setting.Repository.PullRequest.DefaultMergeMessageSize)
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if err != nil {
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if !git.IsErrNotExist(err) {
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return "", "", err
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}
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} else {
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vars := map[string]string{
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"BaseRepoOwnerName": pr.BaseRepo.OwnerName,
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"BaseRepoName": pr.BaseRepo.Name,
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"BaseBranch": pr.BaseBranch,
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"HeadRepoOwnerName": "",
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"HeadRepoName": "",
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"HeadBranch": pr.HeadBranch,
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"PullRequestTitle": pr.Issue.Title,
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"PullRequestDescription": pr.Issue.Content,
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"PullRequestPosterName": pr.Issue.Poster.Name,
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"PullRequestIndex": strconv.FormatInt(pr.Index, 10),
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"PullRequestReference": fmt.Sprintf("%s%d", issueReference, pr.Index),
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}
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if pr.HeadRepo != nil {
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vars["HeadRepoOwnerName"] = pr.HeadRepo.OwnerName
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vars["HeadRepoName"] = pr.HeadRepo.Name
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}
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for extraKey, extraValue := range extraVars {
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vars[extraKey] = extraValue
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}
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refs, err := pr.ResolveCrossReferences(ctx)
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if err == nil {
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closeIssueIndexes := make([]string, 0, len(refs))
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closeWord := "close"
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if len(setting.Repository.PullRequest.CloseKeywords) > 0 {
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closeWord = setting.Repository.PullRequest.CloseKeywords[0]
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}
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for _, ref := range refs {
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if ref.RefAction == references.XRefActionCloses {
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if err := ref.LoadIssue(ctx); err != nil {
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return "", "", err
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}
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closeIssueIndexes = append(closeIssueIndexes, fmt.Sprintf("%s %s%d", closeWord, issueReference, ref.Issue.Index))
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}
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}
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if len(closeIssueIndexes) > 0 {
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vars["ClosingIssues"] = strings.Join(closeIssueIndexes, ", ")
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} else {
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vars["ClosingIssues"] = ""
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}
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}
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message, body = expandDefaultMergeMessage(templateContent, vars)
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return message, body, nil
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}
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}
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if mergeStyle == repo_model.MergeStyleRebase {
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// for fast-forward rebase, do not amend the last commit if there is no template
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return "", "", nil
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}
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// Squash merge has a different from other styles.
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if mergeStyle == repo_model.MergeStyleSquash {
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return fmt.Sprintf("%s (%s%d)", pr.Issue.Title, issueReference, pr.Issue.Index), "", nil
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}
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if pr.BaseRepoID == pr.HeadRepoID {
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return fmt.Sprintf("Merge pull request '%s' (%s%d) from %s into %s", pr.Issue.Title, issueReference, pr.Issue.Index, pr.HeadBranch, pr.BaseBranch), "", nil
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}
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if pr.HeadRepo == nil {
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return fmt.Sprintf("Merge pull request '%s' (%s%d) from <deleted>:%s into %s", pr.Issue.Title, issueReference, pr.Issue.Index, pr.HeadBranch, pr.BaseBranch), "", nil
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}
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return fmt.Sprintf("Merge pull request '%s' (%s%d) from %s:%s into %s", pr.Issue.Title, issueReference, pr.Issue.Index, pr.HeadRepo.FullName(), pr.HeadBranch, pr.BaseBranch), "", nil
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}
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func expandDefaultMergeMessage(template string, vars map[string]string) (message, body string) {
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message = strings.TrimSpace(template)
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if splits := strings.SplitN(message, "\n", 2); len(splits) == 2 {
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message = splits[0]
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body = strings.TrimSpace(splits[1])
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}
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mapping := func(s string) string { return vars[s] }
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return os.Expand(message, mapping), os.Expand(body, mapping)
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}
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// GetDefaultMergeMessage returns default message used when merging pull request
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func GetDefaultMergeMessage(ctx context.Context, baseGitRepo *git.Repository, pr *issues_model.PullRequest, mergeStyle repo_model.MergeStyle) (message, body string, err error) {
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return getMergeMessage(ctx, baseGitRepo, pr, mergeStyle, nil)
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}
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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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func Merge(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.User, baseGitRepo *git.Repository, mergeStyle repo_model.MergeStyle, expectedHeadCommitID, message string, wasAutoMerged bool) error {
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if err := pr.LoadBaseRepo(ctx); err != nil {
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log.Error("Unable to load base repo: %v", err)
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return fmt.Errorf("unable to load base repo: %w", err)
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} else if err := pr.LoadHeadRepo(ctx); err != nil {
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log.Error("Unable to load head repo: %v", err)
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return fmt.Errorf("unable to load head repo: %w", err)
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}
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pullWorkingPool.CheckIn(fmt.Sprint(pr.ID))
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defer pullWorkingPool.CheckOut(fmt.Sprint(pr.ID))
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// Removing an auto merge pull and ignore if not exist
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// FIXME: is this the correct point to do this? Shouldn't this be after IsMergeStyleAllowed?
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if err := pull_model.DeleteScheduledAutoMerge(ctx, pr.ID); err != nil && !db.IsErrNotExist(err) {
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return err
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}
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prUnit, err := pr.BaseRepo.GetUnit(ctx, unit.TypePullRequests)
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if err != nil {
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log.Error("pr.BaseRepo.GetUnit(unit.TypePullRequests): %v", err)
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return err
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}
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prConfig := prUnit.PullRequestsConfig()
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// Check if merge style is correct and allowed
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if !prConfig.IsMergeStyleAllowed(mergeStyle) {
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return models.ErrInvalidMergeStyle{ID: pr.BaseRepo.ID, Style: mergeStyle}
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}
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defer func() {
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go AddTestPullRequestTask(doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "")
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}()
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pr.MergedCommitID, err = doMergeAndPush(ctx, 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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pr.MergedUnix = timeutil.TimeStampNow()
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pr.Merger = doer
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pr.MergerID = doer.ID
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if _, err := pr.SetMerged(ctx); err != nil {
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log.Error("SetMerged %-v: %v", pr, err)
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}
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if err := pr.LoadIssue(ctx); err != nil {
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log.Error("LoadIssue %-v: %v", pr, err)
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}
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if err := pr.Issue.LoadRepo(ctx); err != nil {
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log.Error("pr.Issue.LoadRepo %-v: %v", pr, err)
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}
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if err := pr.Issue.Repo.LoadOwner(ctx); err != nil {
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log.Error("LoadOwner for %-v: %v", pr, err)
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}
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if wasAutoMerged {
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notify_service.AutoMergePullRequest(ctx, doer, pr)
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} else {
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notify_service.MergePullRequest(ctx, doer, pr)
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}
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// Reset cached commit count
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cache.Remove(pr.Issue.Repo.GetCommitsCountCacheKey(pr.BaseBranch, true))
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// Resolve cross references
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refs, err := pr.ResolveCrossReferences(ctx)
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if err != nil {
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log.Error("ResolveCrossReferences: %v", err)
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return nil
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}
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for _, ref := range refs {
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if err = ref.LoadIssue(ctx); err != nil {
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return err
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}
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if err = ref.Issue.LoadRepo(ctx); err != nil {
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return err
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}
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close := ref.RefAction == references.XRefActionCloses
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if close != ref.Issue.IsClosed {
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if err = issue_service.ChangeStatus(ctx, ref.Issue, doer, pr.MergedCommitID, close); err != nil {
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// Allow ErrDependenciesLeft
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if !issues_model.IsErrDependenciesLeft(err) {
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return err
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}
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}
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}
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}
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return nil
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}
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// doMergeAndPush performs the merge operation without changing any pull information in database and pushes it up to the base repository
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func doMergeAndPush(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.User, mergeStyle repo_model.MergeStyle, expectedHeadCommitID, message string) (string, error) {
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// Clone base repo.
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mergeCtx, cancel, err := createTemporaryRepoForMerge(ctx, pr, doer, expectedHeadCommitID)
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if err != nil {
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return "", err
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}
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defer cancel()
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// Merge commits.
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switch mergeStyle {
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case repo_model.MergeStyleMerge:
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if err := doMergeStyleMerge(mergeCtx, message); err != nil {
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return "", err
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}
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case repo_model.MergeStyleRebase, repo_model.MergeStyleRebaseMerge:
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if err := doMergeStyleRebase(mergeCtx, mergeStyle, message); err != nil {
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return "", err
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}
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case repo_model.MergeStyleSquash:
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if err := doMergeStyleSquash(mergeCtx, message); err != nil {
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return "", err
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}
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default:
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return "", models.ErrInvalidMergeStyle{ID: pr.BaseRepo.ID, Style: mergeStyle}
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}
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// OK we should cache our current head and origin/headbranch
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mergeHeadSHA, err := git.GetFullCommitID(ctx, mergeCtx.tmpBasePath, "HEAD")
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if err != nil {
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return "", fmt.Errorf("Failed to get full commit id for HEAD: %w", err)
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}
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mergeBaseSHA, err := git.GetFullCommitID(ctx, mergeCtx.tmpBasePath, "original_"+baseBranch)
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if err != nil {
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return "", fmt.Errorf("Failed to get full commit id for origin/%s: %w", pr.BaseBranch, err)
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}
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mergeCommitID, err := git.GetFullCommitID(ctx, mergeCtx.tmpBasePath, baseBranch)
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if err != nil {
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return "", fmt.Errorf("Failed to get full commit id for the new merge: %w", err)
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}
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// Now it's questionable about where this should go - either after or before the push
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// I think in the interests of data safety - failures to push to the lfs should prevent
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// the merge as you can always remerge.
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if setting.LFS.StartServer {
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if err := LFSPush(ctx, mergeCtx.tmpBasePath, mergeHeadSHA, mergeBaseSHA, pr); err != nil {
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return "", err
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}
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}
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var headUser *user_model.User
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err = pr.HeadRepo.LoadOwner(ctx)
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if err != nil {
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if !user_model.IsErrUserNotExist(err) {
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log.Error("Can't find user: %d for head repository in %-v: %v", pr.HeadRepo.OwnerID, pr, err)
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return "", err
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}
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log.Warn("Can't find user: %d for head repository in %-v - defaulting to doer: %s - %v", pr.HeadRepo.OwnerID, pr, doer.Name, err)
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headUser = doer
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} else {
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headUser = pr.HeadRepo.Owner
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}
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mergeCtx.env = repo_module.FullPushingEnvironment(
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headUser,
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doer,
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pr.BaseRepo,
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pr.BaseRepo.Name,
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pr.ID,
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)
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pushCmd := git.NewCommand(ctx, "push", "origin").AddDynamicArguments(baseBranch + ":" + git.BranchPrefix + pr.BaseBranch)
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// Push back to upstream.
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// TODO: this cause an api call to "/api/internal/hook/post-receive/...",
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// that prevents us from doint the whole merge in one db transaction
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if err := pushCmd.Run(mergeCtx.RunOpts()); err != nil {
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if strings.Contains(mergeCtx.errbuf.String(), "non-fast-forward") {
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return "", &git.ErrPushOutOfDate{
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StdOut: mergeCtx.outbuf.String(),
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StdErr: mergeCtx.errbuf.String(),
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Err: err,
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}
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} else if strings.Contains(mergeCtx.errbuf.String(), "! [remote rejected]") {
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err := &git.ErrPushRejected{
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StdOut: mergeCtx.outbuf.String(),
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StdErr: mergeCtx.errbuf.String(),
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Err: err,
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}
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err.GenerateMessage()
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return "", err
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}
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return "", fmt.Errorf("git push: %s", mergeCtx.errbuf.String())
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}
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mergeCtx.outbuf.Reset()
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mergeCtx.errbuf.Reset()
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return mergeCommitID, nil
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}
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func commitAndSignNoAuthor(ctx *mergeContext, message string) error {
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cmdCommit := git.NewCommand(ctx, "commit").AddOptionFormat("--message=%s", message)
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if ctx.signKeyID == "" {
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cmdCommit.AddArguments("--no-gpg-sign")
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} else {
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cmdCommit.AddOptionFormat("-S%s", ctx.signKeyID)
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}
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if err := cmdCommit.Run(ctx.RunOpts()); err != nil {
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log.Error("git commit %-v: %v\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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return fmt.Errorf("git commit %v: %w\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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}
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return nil
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}
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func runMergeCommand(ctx *mergeContext, mergeStyle repo_model.MergeStyle, cmd *git.Command) error {
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if err := cmd.Run(ctx.RunOpts()); err != nil {
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// Merge will leave a MERGE_HEAD file in the .git folder if there is a conflict
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if _, statErr := os.Stat(filepath.Join(ctx.tmpBasePath, ".git", "MERGE_HEAD")); statErr == nil {
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// We have a merge conflict error
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log.Debug("MergeConflict %-v: %v\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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return models.ErrMergeConflicts{
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Style: mergeStyle,
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StdOut: ctx.outbuf.String(),
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StdErr: ctx.errbuf.String(),
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Err: err,
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}
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} else if strings.Contains(ctx.errbuf.String(), "refusing to merge unrelated histories") {
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log.Debug("MergeUnrelatedHistories %-v: %v\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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return models.ErrMergeUnrelatedHistories{
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Style: mergeStyle,
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StdOut: ctx.outbuf.String(),
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StdErr: ctx.errbuf.String(),
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Err: err,
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}
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}
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log.Error("git merge %-v: %v\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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return fmt.Errorf("git merge %v: %w\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), ctx.errbuf.String())
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}
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ctx.outbuf.Reset()
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ctx.errbuf.Reset()
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return nil
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}
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var escapedSymbols = regexp.MustCompile(`([*[?! \\])`)
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// IsUserAllowedToMerge check if user is allowed to merge PR with given permissions and branch protections
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func IsUserAllowedToMerge(ctx context.Context, pr *issues_model.PullRequest, p access_model.Permission, user *user_model.User) (bool, error) {
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if user == nil {
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return false, nil
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}
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pb, err := git_model.GetFirstMatchProtectedBranchRule(ctx, pr.BaseRepoID, pr.BaseBranch)
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if err != nil {
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return false, err
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}
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if (p.CanWrite(unit.TypeCode) && pb == nil) || (pb != nil && git_model.IsUserMergeWhitelisted(ctx, pb, user.ID, p)) {
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return true, nil
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}
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return false, nil
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}
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// CheckPullBranchProtections checks whether the PR is ready to be merged (reviews and status checks)
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func CheckPullBranchProtections(ctx context.Context, pr *issues_model.PullRequest, skipProtectedFilesCheck bool) (err error) {
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if err = pr.LoadBaseRepo(ctx); err != nil {
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return fmt.Errorf("LoadBaseRepo: %w", err)
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}
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pb, err := git_model.GetFirstMatchProtectedBranchRule(ctx, pr.BaseRepoID, pr.BaseBranch)
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if err != nil {
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return fmt.Errorf("LoadProtectedBranch: %v", err)
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}
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if pb == nil {
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return nil
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}
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isPass, err := IsPullCommitStatusPass(ctx, pr)
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if err != nil {
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return err
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}
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if !isPass {
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return models.ErrDisallowedToMerge{
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Reason: "Not all required status checks successful",
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}
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}
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if !issues_model.HasEnoughApprovals(ctx, pb, pr) {
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return models.ErrDisallowedToMerge{
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Reason: "Does not have enough approvals",
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}
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}
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if issues_model.MergeBlockedByRejectedReview(ctx, pb, pr) {
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return models.ErrDisallowedToMerge{
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Reason: "There are requested changes",
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}
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}
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if issues_model.MergeBlockedByOfficialReviewRequests(ctx, pb, pr) {
|
|
return models.ErrDisallowedToMerge{
|
|
Reason: "There are official review requests",
|
|
}
|
|
}
|
|
|
|
if issues_model.MergeBlockedByOutdatedBranch(pb, pr) {
|
|
return models.ErrDisallowedToMerge{
|
|
Reason: "The head branch is behind the base branch",
|
|
}
|
|
}
|
|
|
|
if skipProtectedFilesCheck {
|
|
return nil
|
|
}
|
|
|
|
if pb.MergeBlockedByProtectedFiles(pr.ChangedProtectedFiles) {
|
|
return models.ErrDisallowedToMerge{
|
|
Reason: "Changed protected files",
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// MergedManually mark pr as merged manually
|
|
func MergedManually(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.User, baseGitRepo *git.Repository, commitID string) error {
|
|
pullWorkingPool.CheckIn(fmt.Sprint(pr.ID))
|
|
defer pullWorkingPool.CheckOut(fmt.Sprint(pr.ID))
|
|
|
|
if err := db.WithTx(ctx, func(ctx context.Context) error {
|
|
if err := pr.LoadBaseRepo(ctx); err != nil {
|
|
return err
|
|
}
|
|
prUnit, err := pr.BaseRepo.GetUnit(ctx, unit.TypePullRequests)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
prConfig := prUnit.PullRequestsConfig()
|
|
|
|
// Check if merge style is correct and allowed
|
|
if !prConfig.IsMergeStyleAllowed(repo_model.MergeStyleManuallyMerged) {
|
|
return models.ErrInvalidMergeStyle{ID: pr.BaseRepo.ID, Style: repo_model.MergeStyleManuallyMerged}
|
|
}
|
|
|
|
objectFormat, _ := baseGitRepo.GetObjectFormat()
|
|
if len(commitID) != objectFormat.FullLength() {
|
|
return fmt.Errorf("Wrong commit ID")
|
|
}
|
|
|
|
commit, err := baseGitRepo.GetCommit(commitID)
|
|
if err != nil {
|
|
if git.IsErrNotExist(err) {
|
|
return fmt.Errorf("Wrong commit ID")
|
|
}
|
|
return err
|
|
}
|
|
commitID = commit.ID.String()
|
|
|
|
ok, err := baseGitRepo.IsCommitInBranch(commitID, pr.BaseBranch)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !ok {
|
|
return fmt.Errorf("Wrong commit ID")
|
|
}
|
|
|
|
pr.MergedCommitID = commitID
|
|
pr.MergedUnix = timeutil.TimeStamp(commit.Author.When.Unix())
|
|
pr.Status = issues_model.PullRequestStatusManuallyMerged
|
|
pr.Merger = doer
|
|
pr.MergerID = doer.ID
|
|
|
|
var merged bool
|
|
if merged, err = pr.SetMerged(ctx); err != nil {
|
|
return err
|
|
} else if !merged {
|
|
return fmt.Errorf("SetMerged failed")
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
|
|
notify_service.MergePullRequest(baseGitRepo.Ctx, doer, pr)
|
|
log.Info("manuallyMerged[%d]: Marked as manually merged into %s/%s by commit id: %s", pr.ID, pr.BaseRepo.Name, pr.BaseBranch, commitID)
|
|
return nil
|
|
}
|