forked from gitea/gitea
128 lines
3.9 KiB
Go
128 lines
3.9 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package pull
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import (
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"fmt"
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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/modules/git"
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"code.gitea.io/gitea/modules/log"
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)
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// Update updates pull request with base branch.
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func Update(pull *models.PullRequest, doer *models.User, message string) error {
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//use merge functions but switch repo's and branch's
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pr := &models.PullRequest{
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HeadRepoID: pull.BaseRepoID,
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BaseRepoID: pull.HeadRepoID,
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HeadBranch: pull.BaseBranch,
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BaseBranch: pull.HeadBranch,
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}
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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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} else if err = pr.LoadBaseRepo(); err != nil {
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log.Error("LoadBaseRepo: %v", err)
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return fmt.Errorf("LoadBaseRepo: %v", err)
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}
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diffCount, err := GetDiverging(pull)
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if err != nil {
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return err
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} else if diffCount.Behind == 0 {
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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, models.MergeStyleMerge, message)
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defer func() {
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go AddTestPullRequestTask(doer, pr.HeadRepo.ID, pr.HeadBranch, false, "", "")
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}()
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return err
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}
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// IsUserAllowedToUpdate check if user is allowed to update PR with given permissions and branch protections
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func IsUserAllowedToUpdate(pull *models.PullRequest, user *models.User) (bool, error) {
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headRepoPerm, err := models.GetUserRepoPermission(pull.HeadRepo, user)
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if err != nil {
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return false, err
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}
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pr := &models.PullRequest{
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HeadRepoID: pull.BaseRepoID,
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BaseRepoID: pull.HeadRepoID,
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HeadBranch: pull.BaseBranch,
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BaseBranch: pull.HeadBranch,
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}
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return IsUserAllowedToMerge(pr, headRepoPerm, user)
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}
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// GetDiverging determines how many commits a PR is ahead or behind the PR base branch
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func GetDiverging(pr *models.PullRequest) (*git.DivergeObject, error) {
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log.Trace("PushToBaseRepo[%d]: pushing commits to base repo '%s'", pr.BaseRepoID, pr.GetGitRefName())
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if err := pr.LoadBaseRepo(); err != nil {
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return nil, err
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}
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if err := pr.LoadHeadRepo(); err != nil {
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return nil, err
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}
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headRepoPath := pr.HeadRepo.RepoPath()
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headGitRepo, err := git.OpenRepository(headRepoPath)
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if err != nil {
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return nil, fmt.Errorf("OpenRepository: %v", err)
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}
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defer headGitRepo.Close()
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if pr.IsSameRepo() {
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diff, err := git.GetDivergingCommits(pr.HeadRepo.RepoPath(), pr.BaseBranch, pr.HeadBranch)
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return &diff, err
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}
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tmpRemoteName := fmt.Sprintf("tmp-pull-%d-base", pr.ID)
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if err = headGitRepo.AddRemote(tmpRemoteName, pr.BaseRepo.RepoPath(), true); err != nil {
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return nil, fmt.Errorf("headGitRepo.AddRemote: %v", err)
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}
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// Make sure to remove the remote even if the push fails
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defer func() {
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if err := headGitRepo.RemoveRemote(tmpRemoteName); err != nil {
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log.Error("CountDiverging: RemoveRemote: %s", err)
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}
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}()
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// $(git rev-list --count tmp-pull-1-base/master..feature) commits ahead of master
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ahead, errorAhead := checkDivergence(headRepoPath, fmt.Sprintf("%s/%s", tmpRemoteName, pr.BaseBranch), pr.HeadBranch)
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if errorAhead != nil {
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return &git.DivergeObject{}, errorAhead
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}
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// $(git rev-list --count feature..tmp-pull-1-base/master) commits behind master
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behind, errorBehind := checkDivergence(headRepoPath, pr.HeadBranch, fmt.Sprintf("%s/%s", tmpRemoteName, pr.BaseBranch))
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if errorBehind != nil {
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return &git.DivergeObject{}, errorBehind
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}
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return &git.DivergeObject{Ahead: ahead, Behind: behind}, nil
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}
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func checkDivergence(repoPath string, baseBranch string, targetBranch string) (int, error) {
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branches := fmt.Sprintf("%s..%s", baseBranch, targetBranch)
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cmd := git.NewCommand("rev-list", "--count", branches)
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stdout, err := cmd.RunInDir(repoPath)
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if err != nil {
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return -1, err
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}
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outInteger, errInteger := strconv.Atoi(strings.Trim(stdout, "\n"))
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if errInteger != nil {
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return -1, errInteger
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}
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return outInteger, nil
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}
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