A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// 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 (
"bufio"
"context"
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
)
// DownloadDiffOrPatch will write the patch for the pr to the writer
func DownloadDiffOrPatch(pr *models.PullRequest, w io.Writer, patch bool) error {
// Clone base repo.
tmpBasePath, err := createTemporaryRepo(pr)
if err != nil {
log.Error("CreateTemporaryPath: %v", err)
return err
}
defer func() {
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("DownloadDiff: RemoveTemporaryPath: %s", err)
}
}()
gitRepo, err := git.OpenRepository(tmpBasePath)
if err != nil {
return fmt.Errorf("OpenRepository: %v", err)
}
defer gitRepo.Close()
pr.MergeBase, err = git.NewCommand("merge-base", "--", "base", "tracking").RunInDir(tmpBasePath)
if err != nil {
pr.MergeBase = "base"
}
pr.MergeBase = strings.TrimSpace(pr.MergeBase)
if err := gitRepo.GetDiffOrPatch(pr.MergeBase, "tracking", w, patch); err != nil {
log.Error("Unable to get patch file from %s to %s in %s Error: %v", pr.MergeBase, pr.HeadBranch, pr.BaseRepo.FullName(), err)
return fmt.Errorf("Unable to get patch file from %s to %s in %s Error: %v", pr.MergeBase, pr.HeadBranch, pr.BaseRepo.FullName(), err)
}
return nil
}
var patchErrorSuffices = []string{
": already exists in index",
": patch does not apply",
": already exists in working directory",
"unrecognized input",
}
// TestPatch will test whether a simple patch will apply
func TestPatch(pr *models.PullRequest) error {
// Clone base repo.
tmpBasePath, err := createTemporaryRepo(pr)
if err != nil {
log.Error("CreateTemporaryPath: %v", err)
return err
}
defer func() {
if err := models.RemoveTemporaryPath(tmpBasePath); err != nil {
log.Error("Merge: RemoveTemporaryPath: %s", err)
}
}()
gitRepo, err := git.OpenRepository(tmpBasePath)
if err != nil {
return fmt.Errorf("OpenRepository: %v", err)
}
defer gitRepo.Close()
pr.MergeBase, err = git.NewCommand("merge-base", "--", "base", "tracking").RunInDir(tmpBasePath)
if err != nil {
var err2 error
pr.MergeBase, err2 = gitRepo.GetRefCommitID(git.BranchPrefix + "base")
if err2 != nil {
return fmt.Errorf("GetMergeBase: %v and can't find commit ID for base: %v", err, err2)
}
}
pr.MergeBase = strings.TrimSpace(pr.MergeBase)
tmpPatchFile, err := ioutil.TempFile("", "patch")
if err != nil {
log.Error("Unable to create temporary patch file! Error: %v", err)
return fmt.Errorf("Unable to create temporary patch file! Error: %v", err)
}
defer func() {
_ = os.Remove(tmpPatchFile.Name())
}()
if err := gitRepo.GetDiff(pr.MergeBase, "tracking", tmpPatchFile); err != nil {
tmpPatchFile.Close()
log.Error("Unable to get patch file from %s to %s in %s Error: %v", pr.MergeBase, pr.HeadBranch, pr.BaseRepo.FullName(), err)
return fmt.Errorf("Unable to get patch file from %s to %s in %s Error: %v", pr.MergeBase, pr.HeadBranch, pr.BaseRepo.FullName(), err)
}
stat, err := tmpPatchFile.Stat()
if err != nil {
tmpPatchFile.Close()
return fmt.Errorf("Unable to stat patch file: %v", err)
}
patchPath := tmpPatchFile.Name()
tmpPatchFile.Close()
if stat.Size() == 0 {
log.Debug("PullRequest[%d]: Patch is empty - ignoring", pr.ID)
pr.Status = models.PullRequestStatusMergeable
pr.ConflictedFiles = []string{}
return nil
}
log.Trace("PullRequest[%d].testPatch (patchPath): %s", pr.ID, patchPath)
pr.Status = models.PullRequestStatusChecking
_, err = git.NewCommand("read-tree", "base").RunInDir(tmpBasePath)
if err != nil {
return fmt.Errorf("git read-tree %s: %v", pr.BaseBranch, err)
}
prUnit, err := pr.BaseRepo.GetUnit(models.UnitTypePullRequests)
if err != nil {
return err
}
prConfig := prUnit.PullRequestsConfig()
args := []string{"apply", "--check", "--cached"}
if prConfig.IgnoreWhitespaceConflicts {
args = append(args, "--ignore-whitespace")
}
args = append(args, patchPath)
pr.ConflictedFiles = make([]string, 0, 5)
stderrReader, stderrWriter, err := os.Pipe()
if err != nil {
log.Error("Unable to open stderr pipe: %v", err)
return fmt.Errorf("Unable to open stderr pipe: %v", err)
}
defer func() {
_ = stderrReader.Close()
_ = stderrWriter.Close()
}()
conflict := false
err = git.NewCommand(args...).
RunInDirTimeoutEnvFullPipelineFunc(
nil, -1, tmpBasePath,
nil, stderrWriter, nil,
func(ctx context.Context, cancel context.CancelFunc) error {
_ = stderrWriter.Close()
const prefix = "error: patch failed:"
const errorPrefix = "error: "
conflictMap := map[string]bool{}
scanner := bufio.NewScanner(stderrReader)
for scanner.Scan() {
line := scanner.Text()
if strings.HasPrefix(line, prefix) {
conflict = true
filepath := strings.TrimSpace(strings.Split(line[len(prefix):], ":")[0])
conflictMap[filepath] = true
} else if strings.HasPrefix(line, errorPrefix) {
conflict = true
for _, suffix := range patchErrorSuffices {
if strings.HasSuffix(line, suffix) {
filepath := strings.TrimSpace(strings.TrimSuffix(line[len(errorPrefix):], suffix))
if filepath != "" {
conflictMap[filepath] = true
}
break
}
}
}
// only list 10 conflicted files
if len(conflictMap) >= 10 {
break
}
}
if len(conflictMap) > 0 {
pr.ConflictedFiles = make([]string, 0, len(conflictMap))
for key := range conflictMap {
pr.ConflictedFiles = append(pr.ConflictedFiles, key)
}
}
_ = stderrReader.Close()
return nil
})
if err != nil {
if conflict {
pr.Status = models.PullRequestStatusConflict
log.Trace("Found %d files conflicted: %v", len(pr.ConflictedFiles), pr.ConflictedFiles)
return nil
}
return fmt.Errorf("git apply --check: %v", err)
}
pr.Status = models.PullRequestStatusMergeable
return nil
}