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// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package pull
import (
"context"
"fmt"
"code.gitea.io/gitea/models"
git_model "code.gitea.io/gitea/models/git"
issues_model "code.gitea.io/gitea/models/issues"
access_model "code.gitea.io/gitea/models/perm/access"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/models/unit"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
)
// Update updates pull request with base branch.
func Update(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.User, message string, rebase bool) error {
if pr.Flow == issues_model.PullRequestFlowAGit {
// TODO: update of agit flow pull request's head branch is unsupported
return fmt.Errorf("update of agit flow pull request's head branch is unsupported")
}
pullWorkingPool.CheckIn(fmt.Sprint(pr.ID))
defer pullWorkingPool.CheckOut(fmt.Sprint(pr.ID))
diffCount, err := GetDiverging(ctx, pr)
if err != nil {
return err
} else if diffCount.Behind == 0 {
return fmt.Errorf("HeadBranch of PR %d is up to date", pr.Index)
}
if rebase {
defer func() {
go AddTestPullRequestTask(doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "")
}()
return updateHeadByRebaseOnToBase(ctx, pr, doer, message)
}
if err := pr.LoadBaseRepo(ctx); err != nil {
log.Error("unable to load BaseRepo for %-v during update-by-merge: %v", pr, err)
return fmt.Errorf("unable to load BaseRepo for PR[%d] during update-by-merge: %w", pr.ID, err)
}
if err := pr.LoadHeadRepo(ctx); err != nil {
log.Error("unable to load HeadRepo for PR %-v during update-by-merge: %v", pr, err)
return fmt.Errorf("unable to load HeadRepo for PR[%d] during update-by-merge: %w", pr.ID, err)
}
if pr.HeadRepo == nil {
// LoadHeadRepo will swallow ErrRepoNotExist so if pr.HeadRepo is still nil recreate the error
err := repo_model.ErrRepoNotExist{
ID: pr.HeadRepoID,
}
log.Error("unable to load HeadRepo for PR %-v during update-by-merge: %v", pr, err)
return fmt.Errorf("unable to load HeadRepo for PR[%d] during update-by-merge: %w", pr.ID, err)
}
// use merge functions but switch repos and branches
reversePR := &issues_model.PullRequest{
ID: pr.ID,
HeadRepoID: pr.BaseRepoID,
HeadRepo: pr.BaseRepo,
HeadBranch: pr.BaseBranch,
BaseRepoID: pr.HeadRepoID,
BaseRepo: pr.HeadRepo,
BaseBranch: pr.HeadBranch,
}
_, err = doMergeAndPush(ctx, reversePR, doer, repo_model.MergeStyleMerge, "", message)
defer func() {
go AddTestPullRequestTask(doer, reversePR.HeadRepo.ID, reversePR.HeadBranch, false, "", "")
}()
return err
}
// IsUserAllowedToUpdate check if user is allowed to update PR with given permissions and branch protections
func IsUserAllowedToUpdate(ctx context.Context, pull *issues_model.PullRequest, user *user_model.User) (mergeAllowed, rebaseAllowed bool, err error) {
if pull.Flow == issues_model.PullRequestFlowAGit {
return false, false, nil
}
if user == nil {
return false, false, nil
}
headRepoPerm, err := access_model.GetUserRepoPermission(ctx, pull.HeadRepo, user)
if err != nil {
if repo_model.IsErrUnitTypeNotExist(err) {
return false, false, nil
}
return false, false, err
}
if err := pull.LoadBaseRepo(ctx); err != nil {
return false, false, err
}
pr := &issues_model.PullRequest{
HeadRepoID: pull.BaseRepoID,
HeadRepo: pull.BaseRepo,
BaseRepoID: pull.HeadRepoID,
BaseRepo: pull.HeadRepo,
HeadBranch: pull.BaseBranch,
BaseBranch: pull.HeadBranch,
}
pb, err := git_model.GetFirstMatchProtectedBranchRule(ctx, pr.BaseRepoID, pr.BaseBranch)
if err != nil {
return false, false, err
}
// can't do rebase on protected branch because need force push
if pb == nil {
if err := pr.LoadBaseRepo(ctx); err != nil {
return false, false, err
}
prUnit, err := pr.BaseRepo.GetUnit(ctx, unit.TypePullRequests)
if err != nil {
if repo_model.IsErrUnitTypeNotExist(err) {
return false, false, nil
}
log.Error("pr.BaseRepo.GetUnit(unit.TypePullRequests): %v", err)
return false, false, err
}
rebaseAllowed = prUnit.PullRequestsConfig().AllowRebaseUpdate
}
// Update function need push permission
if pb != nil {
pb.Repo = pull.BaseRepo
if !pb.CanUserPush(ctx, user) {
return false, false, nil
}
}
baseRepoPerm, err := access_model.GetUserRepoPermission(ctx, pull.BaseRepo, user)
if err != nil {
return false, false, err
}
mergeAllowed, err = IsUserAllowedToMerge(ctx, pr, headRepoPerm, user)
if err != nil {
return false, false, err
}
if pull.AllowMaintainerEdit {
mergeAllowedMaintainer, err := IsUserAllowedToMerge(ctx, pr, baseRepoPerm, user)
if err != nil {
return false, false, err
}
mergeAllowed = mergeAllowed || mergeAllowedMaintainer
}
return mergeAllowed, rebaseAllowed, nil
}
// GetDiverging determines how many commits a PR is ahead or behind the PR base branch
func GetDiverging(ctx context.Context, pr *issues_model.PullRequest) (*git.DivergeObject, error) {
log.Trace("GetDiverging[%-v]: compare commits", pr)
prCtx, cancel, err := createTemporaryRepoForPR(ctx, pr)
if err != nil {
if !models.IsErrBranchDoesNotExist(err) {
log.Error("CreateTemporaryRepoForPR %-v: %v", pr, err)
}
return nil, err
}
defer cancel()
diff, err := git.GetDivergingCommits(ctx, prCtx.tmpBasePath, baseBranch, trackingBranch)
return &diff, err
}
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