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mirror of https://github.com/go-gitea/gitea.git synced 2025-02-20 15:45:29 +01:00
gitea/services/pull/temp_repo.go
zeripath 01087e9eef
Make Requests Processes and create process hierarchy. Associate OpenRepository with context. ()
This PR registers requests with the process manager and manages hierarchy within the processes.

Git repos are then associated with a context, (usually the request's context) - with sub commands using this context as their base context.

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-11-30 20:06:32 +00:00

168 lines
7.2 KiB
Go

// Copyright 2019 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 pull
import (
"fmt"
"os"
"path/filepath"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
)
// createTemporaryRepo creates a temporary repo with "base" for pr.BaseBranch and "tracking" for pr.HeadBranch
// it also create a second base branch called "original_base"
func createTemporaryRepo(pr *models.PullRequest) (string, error) {
if err := pr.LoadHeadRepo(); err != nil {
log.Error("LoadHeadRepo: %v", err)
return "", fmt.Errorf("LoadHeadRepo: %v", err)
} else if pr.HeadRepo == nil {
log.Error("Pr %d HeadRepo %d does not exist", pr.ID, pr.HeadRepoID)
return "", &models.ErrRepoNotExist{
ID: pr.HeadRepoID,
}
} else if err := pr.LoadBaseRepo(); err != nil {
log.Error("LoadBaseRepo: %v", err)
return "", fmt.Errorf("LoadBaseRepo: %v", err)
} else if pr.BaseRepo == nil {
log.Error("Pr %d BaseRepo %d does not exist", pr.ID, pr.BaseRepoID)
return "", &models.ErrRepoNotExist{
ID: pr.BaseRepoID,
}
} else if err := pr.HeadRepo.GetOwner(); err != nil {
log.Error("HeadRepo.GetOwner: %v", err)
return "", fmt.Errorf("HeadRepo.GetOwner: %v", err)
} else if err := pr.BaseRepo.GetOwner(); err != nil {
log.Error("BaseRepo.GetOwner: %v", err)
return "", fmt.Errorf("BaseRepo.GetOwner: %v", err)
}
// Clone base repo.
tmpBasePath, err := models.CreateTemporaryPath("pull")
if err != nil {
log.Error("CreateTemporaryPath: %v", err)
return "", err
}
baseRepoPath := pr.BaseRepo.RepoPath()
headRepoPath := pr.HeadRepo.RepoPath()
if err := git.InitRepository(tmpBasePath, false); err != nil {
log.Error("git init tmpBasePath: %v", err)
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", err
}
remoteRepoName := "head_repo"
baseBranch := "base"
// Add head repo remote.
addCacheRepo := func(staging, cache string) error {
p := filepath.Join(staging, ".git", "objects", "info", "alternates")
f, err := os.OpenFile(p, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
if err != nil {
log.Error("Could not create .git/objects/info/alternates file in %s: %v", staging, err)
return err
}
defer f.Close()
data := filepath.Join(cache, "objects")
if _, err := fmt.Fprintln(f, data); err != nil {
log.Error("Could not write to .git/objects/info/alternates file in %s: %v", staging, err)
return err
}
return nil
}
if err := addCacheRepo(tmpBasePath, baseRepoPath); err != nil {
log.Error("Unable to add base repository to temporary repo [%s -> %s]: %v", pr.BaseRepo.FullName(), tmpBasePath, err)
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", fmt.Errorf("Unable to add base repository to temporary repo [%s -> tmpBasePath]: %v", pr.BaseRepo.FullName(), err)
}
var outbuf, errbuf strings.Builder
if err := git.NewCommand("remote", "add", "-t", pr.BaseBranch, "-m", pr.BaseBranch, "origin", baseRepoPath).RunInDirPipeline(tmpBasePath, &outbuf, &errbuf); err != nil {
log.Error("Unable to add base repository as origin [%s -> %s]: %v\n%s\n%s", pr.BaseRepo.FullName(), tmpBasePath, err, outbuf.String(), errbuf.String())
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", fmt.Errorf("Unable to add base repository as origin [%s -> tmpBasePath]: %v\n%s\n%s", pr.BaseRepo.FullName(), err, outbuf.String(), errbuf.String())
}
outbuf.Reset()
errbuf.Reset()
if err := git.NewCommand("fetch", "origin", "--no-tags", "--", pr.BaseBranch+":"+baseBranch, pr.BaseBranch+":original_"+baseBranch).RunInDirPipeline(tmpBasePath, &outbuf, &errbuf); err != nil {
log.Error("Unable to fetch origin base branch [%s:%s -> base, original_base in %s]: %v:\n%s\n%s", pr.BaseRepo.FullName(), pr.BaseBranch, tmpBasePath, err, outbuf.String(), errbuf.String())
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", fmt.Errorf("Unable to fetch origin base branch [%s:%s -> base, original_base in tmpBasePath]: %v\n%s\n%s", pr.BaseRepo.FullName(), pr.BaseBranch, err, outbuf.String(), errbuf.String())
}
outbuf.Reset()
errbuf.Reset()
if err := git.NewCommand("symbolic-ref", "HEAD", git.BranchPrefix+baseBranch).RunInDirPipeline(tmpBasePath, &outbuf, &errbuf); err != nil {
log.Error("Unable to set HEAD as base branch [%s]: %v\n%s\n%s", tmpBasePath, err, outbuf.String(), errbuf.String())
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", fmt.Errorf("Unable to set HEAD as base branch [tmpBasePath]: %v\n%s\n%s", err, outbuf.String(), errbuf.String())
}
outbuf.Reset()
errbuf.Reset()
if err := addCacheRepo(tmpBasePath, headRepoPath); err != nil {
log.Error("Unable to add head repository to temporary repo [%s -> %s]: %v", pr.HeadRepo.FullName(), tmpBasePath, err)
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", fmt.Errorf("Unable to head base repository to temporary repo [%s -> tmpBasePath]: %v", pr.HeadRepo.FullName(), err)
}
if err := git.NewCommand("remote", "add", remoteRepoName, headRepoPath).RunInDirPipeline(tmpBasePath, &outbuf, &errbuf); err != nil {
log.Error("Unable to add head repository as head_repo [%s -> %s]: %v\n%s\n%s", pr.HeadRepo.FullName(), tmpBasePath, err, outbuf.String(), errbuf.String())
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
return "", fmt.Errorf("Unable to add head repository as head_repo [%s -> tmpBasePath]: %v\n%s\n%s", pr.HeadRepo.FullName(), err, outbuf.String(), errbuf.String())
}
outbuf.Reset()
errbuf.Reset()
trackingBranch := "tracking"
// Fetch head branch
var headBranch string
if pr.Flow == models.PullRequestFlowGithub {
headBranch = git.BranchPrefix + pr.HeadBranch
} else if len(pr.HeadCommitID) == 40 { // for not created pull request
headBranch = pr.HeadCommitID
} else {
headBranch = pr.GetGitRefName()
}
if err := git.NewCommand("fetch", "--no-tags", remoteRepoName, headBranch+":"+trackingBranch).RunInDirPipeline(tmpBasePath, &outbuf, &errbuf); err != nil {
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
}
if !git.IsBranchExist(git.DefaultContext, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
return "", models.ErrBranchDoesNotExist{
BranchName: pr.HeadBranch,
}
}
log.Error("Unable to fetch head_repo head branch [%s:%s -> tracking in %s]: %v:\n%s\n%s", pr.HeadRepo.FullName(), pr.HeadBranch, tmpBasePath, err, outbuf.String(), errbuf.String())
return "", fmt.Errorf("Unable to fetch head_repo head branch [%s:%s -> tracking in tmpBasePath]: %v\n%s\n%s", pr.HeadRepo.FullName(), headBranch, err, outbuf.String(), errbuf.String())
}
outbuf.Reset()
errbuf.Reset()
return tmpBasePath, nil
}