196 lines
7.7 KiB
Go
196 lines
7.7 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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"strings"
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"code.gitea.io/gitea/models"
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issues_model "code.gitea.io/gitea/models/issues"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/log"
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repo_module "code.gitea.io/gitea/modules/repository"
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)
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// createTemporaryRepo creates a temporary repo with "base" for pr.BaseBranch and "tracking" for pr.HeadBranch
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// it also create a second base branch called "original_base"
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func createTemporaryRepo(ctx context.Context, pr *issues_model.PullRequest) (string, error) {
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if err := pr.LoadHeadRepo(ctx); err != nil {
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log.Error("LoadHeadRepo: %v", err)
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return "", fmt.Errorf("LoadHeadRepo: %w", err)
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} else if pr.HeadRepo == nil {
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log.Error("Pr %d HeadRepo %d does not exist", pr.ID, pr.HeadRepoID)
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return "", &repo_model.ErrRepoNotExist{
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ID: pr.HeadRepoID,
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}
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} else if err := pr.LoadBaseRepo(ctx); err != nil {
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log.Error("LoadBaseRepo: %v", err)
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return "", fmt.Errorf("LoadBaseRepo: %w", err)
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} else if pr.BaseRepo == nil {
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log.Error("Pr %d BaseRepo %d does not exist", pr.ID, pr.BaseRepoID)
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return "", &repo_model.ErrRepoNotExist{
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ID: pr.BaseRepoID,
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}
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} else if err := pr.HeadRepo.GetOwner(ctx); err != nil {
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log.Error("HeadRepo.GetOwner: %v", err)
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return "", fmt.Errorf("HeadRepo.GetOwner: %w", err)
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} else if err := pr.BaseRepo.GetOwner(ctx); err != nil {
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log.Error("BaseRepo.GetOwner: %v", err)
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return "", fmt.Errorf("BaseRepo.GetOwner: %w", err)
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}
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// Clone base repo.
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tmpBasePath, err := repo_module.CreateTemporaryPath("pull")
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if err != nil {
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log.Error("CreateTemporaryPath: %v", err)
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return "", err
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}
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baseRepoPath := pr.BaseRepo.RepoPath()
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headRepoPath := pr.HeadRepo.RepoPath()
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if err := git.InitRepository(ctx, tmpBasePath, false); err != nil {
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log.Error("git init tmpBasePath: %v", err)
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", err
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}
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remoteRepoName := "head_repo"
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baseBranch := "base"
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// Add head repo remote.
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addCacheRepo := func(staging, cache string) error {
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p := filepath.Join(staging, ".git", "objects", "info", "alternates")
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f, err := os.OpenFile(p, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o600)
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if err != nil {
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log.Error("Could not create .git/objects/info/alternates file in %s: %v", staging, err)
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return err
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}
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defer f.Close()
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data := filepath.Join(cache, "objects")
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if _, err := fmt.Fprintln(f, data); err != nil {
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log.Error("Could not write to .git/objects/info/alternates file in %s: %v", staging, err)
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return err
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}
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return nil
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}
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if err := addCacheRepo(tmpBasePath, baseRepoPath); err != nil {
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log.Error("Unable to add base repository to temporary repo [%s -> %s]: %v", pr.BaseRepo.FullName(), tmpBasePath, err)
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", fmt.Errorf("Unable to add base repository to temporary repo [%s -> tmpBasePath]: %w", pr.BaseRepo.FullName(), err)
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}
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var outbuf, errbuf strings.Builder
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if err := git.NewCommand(ctx, "remote", "add", "-t").AddDynamicArguments(pr.BaseBranch).AddArguments("-m").AddDynamicArguments(pr.BaseBranch).AddDynamicArguments("origin", baseRepoPath).
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Run(&git.RunOpts{
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Dir: tmpBasePath,
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Stdout: &outbuf,
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Stderr: &errbuf,
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}); err != nil {
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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())
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", fmt.Errorf("Unable to add base repository as origin [%s -> tmpBasePath]: %w\n%s\n%s", pr.BaseRepo.FullName(), err, outbuf.String(), errbuf.String())
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}
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outbuf.Reset()
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errbuf.Reset()
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if err := git.NewCommand(ctx, "fetch", "origin", "--no-tags").AddDashesAndList(pr.BaseBranch+":"+baseBranch, pr.BaseBranch+":original_"+baseBranch).
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Run(&git.RunOpts{
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Dir: tmpBasePath,
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Stdout: &outbuf,
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Stderr: &errbuf,
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}); err != nil {
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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())
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", fmt.Errorf("Unable to fetch origin base branch [%s:%s -> base, original_base in tmpBasePath]: %w\n%s\n%s", pr.BaseRepo.FullName(), pr.BaseBranch, err, outbuf.String(), errbuf.String())
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}
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outbuf.Reset()
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errbuf.Reset()
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if err := git.NewCommand(ctx, "symbolic-ref").AddDynamicArguments("HEAD", git.BranchPrefix+baseBranch).
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Run(&git.RunOpts{
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Dir: tmpBasePath,
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Stdout: &outbuf,
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Stderr: &errbuf,
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}); err != nil {
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log.Error("Unable to set HEAD as base branch [%s]: %v\n%s\n%s", tmpBasePath, err, outbuf.String(), errbuf.String())
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", fmt.Errorf("Unable to set HEAD as base branch [tmpBasePath]: %w\n%s\n%s", err, outbuf.String(), errbuf.String())
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}
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outbuf.Reset()
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errbuf.Reset()
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if err := addCacheRepo(tmpBasePath, headRepoPath); err != nil {
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log.Error("Unable to add head repository to temporary repo [%s -> %s]: %v", pr.HeadRepo.FullName(), tmpBasePath, err)
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", fmt.Errorf("Unable to head base repository to temporary repo [%s -> tmpBasePath]: %w", pr.HeadRepo.FullName(), err)
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}
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if err := git.NewCommand(ctx, "remote", "add").AddDynamicArguments(remoteRepoName, headRepoPath).
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Run(&git.RunOpts{
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Dir: tmpBasePath,
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Stdout: &outbuf,
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Stderr: &errbuf,
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}); err != nil {
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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())
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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return "", fmt.Errorf("Unable to add head repository as head_repo [%s -> tmpBasePath]: %w\n%s\n%s", pr.HeadRepo.FullName(), err, outbuf.String(), errbuf.String())
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}
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outbuf.Reset()
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errbuf.Reset()
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trackingBranch := "tracking"
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// Fetch head branch
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var headBranch string
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if pr.Flow == issues_model.PullRequestFlowGithub {
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headBranch = git.BranchPrefix + pr.HeadBranch
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} else if len(pr.HeadCommitID) == git.SHAFullLength { // for not created pull request
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headBranch = pr.HeadCommitID
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} else {
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headBranch = pr.GetGitRefName()
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}
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if err := git.NewCommand(ctx, "fetch", "--no-tags").AddDynamicArguments(remoteRepoName, headBranch+":"+trackingBranch).
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Run(&git.RunOpts{
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Dir: tmpBasePath,
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Stdout: &outbuf,
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Stderr: &errbuf,
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}); err != nil {
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if err := repo_module.RemoveTemporaryPath(tmpBasePath); err != nil {
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log.Error("CreateTempRepo: RemoveTemporaryPath: %s", err)
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}
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if !git.IsBranchExist(ctx, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
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return "", models.ErrBranchDoesNotExist{
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BranchName: pr.HeadBranch,
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}
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}
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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())
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return "", fmt.Errorf("Unable to fetch head_repo head branch [%s:%s -> tracking in tmpBasePath]: %w\n%s\n%s", pr.HeadRepo.FullName(), headBranch, err, outbuf.String(), errbuf.String())
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}
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outbuf.Reset()
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errbuf.Reset()
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return tmpBasePath, nil
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}
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