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gitea/services/mirror/mirror.go

404 lines
11 KiB

// 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 mirror
import (
"fmt"
"net/url"
"strings"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/sync"
"code.gitea.io/gitea/modules/timeutil"
"code.gitea.io/gitea/modules/util"
"github.com/mcuadros/go-version"
"github.com/unknwon/com"
)
// mirrorQueue holds an UniqueQueue object of the mirror
var mirrorQueue = sync.NewUniqueQueue(setting.Repository.MirrorQueueLength)
func readAddress(m *models.Mirror) {
if len(m.Address) > 0 {
return
}
var err error
m.Address, err = remoteAddress(m.Repo.RepoPath())
if err != nil {
log.Error("remoteAddress: %v", err)
}
}
func remoteAddress(repoPath string) (string, error) {
var cmd *git.Command
binVersion, err := git.BinVersion()
if err != nil {
return "", err
}
if version.Compare(binVersion, "2.7", ">=") {
cmd = git.NewCommand("remote", "get-url", "origin")
} else {
cmd = git.NewCommand("config", "--get", "remote.origin.url")
}
result, err := cmd.RunInDir(repoPath)
if err != nil {
if strings.HasPrefix(err.Error(), "exit status 128 - fatal: No such remote ") {
return "", nil
}
return "", err
}
if len(result) > 0 {
return result[:len(result)-1], nil
}
return "", nil
}
// sanitizeOutput sanitizes output of a command, replacing occurrences of the
// repository's remote address with a sanitized version.
func sanitizeOutput(output, repoPath string) (string, error) {
remoteAddr, err := remoteAddress(repoPath)
if err != nil {
// if we're unable to load the remote address, then we're unable to
// sanitize.
return "", err
}
return util.SanitizeMessage(output, remoteAddr), nil
}
// AddressNoCredentials returns mirror address from Git repository config without credentials.
func AddressNoCredentials(m *models.Mirror) string {
readAddress(m)
u, err := url.Parse(m.Address)
if err != nil {
// this shouldn't happen but just return it unsanitised
return m.Address
}
u.User = nil
return u.String()
}
// SaveAddress writes new address to Git repository config.
func SaveAddress(m *models.Mirror, addr string) error {
repoPath := m.Repo.RepoPath()
// Remove old origin
_, err := git.NewCommand("remote", "rm", "origin").RunInDir(repoPath)
if err != nil && !strings.HasPrefix(err.Error(), "exit status 128 - fatal: No such remote ") {
return err
}
_, err = git.NewCommand("remote", "add", "origin", "--mirror=fetch", addr).RunInDir(repoPath)
return err
}
// gitShortEmptySha Git short empty SHA
const gitShortEmptySha = "0000000"
// mirrorSyncResult contains information of a updated reference.
// If the oldCommitID is "0000000", it means a new reference, the value of newCommitID is empty.
// If the newCommitID is "0000000", it means the reference is deleted, the value of oldCommitID is empty.
type mirrorSyncResult struct {
refName string
oldCommitID string
newCommitID string
}
// parseRemoteUpdateOutput detects create, update and delete operations of references from upstream.
func parseRemoteUpdateOutput(output string) []*mirrorSyncResult {
results := make([]*mirrorSyncResult, 0, 3)
lines := strings.Split(output, "\n")
for i := range lines {
// Make sure reference name is presented before continue
idx := strings.Index(lines[i], "-> ")
if idx == -1 {
continue
}
refName := lines[i][idx+3:]
switch {
case strings.HasPrefix(lines[i], " * "): // New reference
results = append(results, &mirrorSyncResult{
refName: refName,
oldCommitID: gitShortEmptySha,
})
case strings.HasPrefix(lines[i], " - "): // Delete reference
results = append(results, &mirrorSyncResult{
refName: refName,
newCommitID: gitShortEmptySha,
})
case strings.HasPrefix(lines[i], " "): // New commits of a reference
delimIdx := strings.Index(lines[i][3:], " ")
if delimIdx == -1 {
log.Error("SHA delimiter not found: %q", lines[i])
continue
}
shas := strings.Split(lines[i][3:delimIdx+3], "..")
if len(shas) != 2 {
log.Error("Expect two SHAs but not what found: %q", lines[i])
continue
}
results = append(results, &mirrorSyncResult{
refName: refName,
oldCommitID: shas[0],
newCommitID: shas[1],
})
default:
log.Warn("parseRemoteUpdateOutput: unexpected update line %q", lines[i])
}
}
return results
}
// runSync returns true if sync finished without error.
func runSync(m *models.Mirror) ([]*mirrorSyncResult, bool) {
repoPath := m.Repo.RepoPath()
wikiPath := m.Repo.WikiPath()
timeout := time.Duration(setting.Git.Timeout.Mirror) * time.Second
gitArgs := []string{"remote", "update"}
if m.EnablePrune {
gitArgs = append(gitArgs, "--prune")
}
_, stderr, err := process.GetManager().ExecDir(
timeout, repoPath, fmt.Sprintf("Mirror.runSync: %s", repoPath),
git.GitExecutable, gitArgs...)
if err != nil {
// sanitize the output, since it may contain the remote address, which may
// contain a password
message, err := sanitizeOutput(stderr, repoPath)
if err != nil {
log.Error("sanitizeOutput: %v", err)
return nil, false
}
desc := fmt.Sprintf("Failed to update mirror repository '%s': %s", repoPath, message)
log.Error(desc)
if err = models.CreateRepositoryNotice(desc); err != nil {
log.Error("CreateRepositoryNotice: %v", err)
}
return nil, false
}
output := stderr
gitRepo, err := git.OpenRepository(repoPath)
if err != nil {
log.Error("OpenRepository: %v", err)
return nil, false
}
if err = models.SyncReleasesWithTags(m.Repo, gitRepo); err != nil {
gitRepo.Close()
log.Error("Failed to synchronize tags to releases for repository: %v", err)
}
gitRepo.Close()
if err := m.Repo.UpdateSize(); err != nil {
log.Error("Failed to update size for mirror repository: %v", err)
}
if m.Repo.HasWiki() {
if _, stderr, err := process.GetManager().ExecDir(
timeout, wikiPath, fmt.Sprintf("Mirror.runSync: %s", wikiPath),
git.GitExecutable, "remote", "update", "--prune"); err != nil {
// sanitize the output, since it may contain the remote address, which may
// contain a password
message, err := sanitizeOutput(stderr, wikiPath)
if err != nil {
log.Error("sanitizeOutput: %v", err)
return nil, false
}
desc := fmt.Sprintf("Failed to update mirror wiki repository '%s': %s", wikiPath, message)
log.Error(desc)
if err = models.CreateRepositoryNotice(desc); err != nil {
log.Error("CreateRepositoryNotice: %v", err)
}
return nil, false
}
}
branches, err := m.Repo.GetBranches()
if err != nil {
log.Error("GetBranches: %v", err)
return nil, false
}
for i := range branches {
cache.Remove(m.Repo.GetCommitsCountCacheKey(branches[i].Name, true))
}
m.UpdatedUnix = timeutil.TimeStampNow()
return parseRemoteUpdateOutput(output), true
}
// Address returns mirror address from Git repository config without credentials.
func Address(m *models.Mirror) string {
readAddress(m)
return util.SanitizeURLCredentials(m.Address, false)
}
// Username returns the mirror address username
func Username(m *models.Mirror) string {
readAddress(m)
u, err := url.Parse(m.Address)
if err != nil {
// this shouldn't happen but if it does return ""
return ""
}
return u.User.Username()
}
// Password returns the mirror address password
func Password(m *models.Mirror) string {
readAddress(m)
u, err := url.Parse(m.Address)
if err != nil {
// this shouldn't happen but if it does return ""
return ""
}
password, _ := u.User.Password()
return password
}
// Update checks and updates mirror repositories.
func Update() {
log.Trace("Doing: Update")
if err := models.MirrorsIterate(func(idx int, bean interface{}) error {
m := bean.(*models.Mirror)
if m.Repo == nil {
log.Error("Disconnected mirror repository found: %d", m.ID)
return nil
}
mirrorQueue.Add(m.RepoID)
return nil
}); err != nil {
log.Error("Update: %v", err)
}
}
// SyncMirrors checks and syncs mirrors.
// TODO: sync more mirrors at same time.
func SyncMirrors() {
// Start listening on new sync requests.
for repoID := range mirrorQueue.Queue() {
syncMirror(repoID)
}
}
func syncMirror(repoID string) {
log.Trace("SyncMirrors [repo_id: %v]", repoID)
mirrorQueue.Remove(repoID)
m, err := models.GetMirrorByRepoID(com.StrTo(repoID).MustInt64())
if err != nil {
log.Error("GetMirrorByRepoID [%s]: %v", repoID, err)
return
}
results, ok := runSync(m)
if !ok {
return
}
m.ScheduleNextUpdate()
if err = models.UpdateMirror(m); err != nil {
log.Error("UpdateMirror [%s]: %v", repoID, err)
return
}
var gitRepo *git.Repository
if len(results) == 0 {
log.Trace("SyncMirrors [repo_id: %d]: no commits fetched", m.RepoID)
} else {
gitRepo, err = git.OpenRepository(m.Repo.RepoPath())
if err != nil {
log.Error("OpenRepository [%d]: %v", m.RepoID, err)
return
}
defer gitRepo.Close()
}
for _, result := range results {
// Discard GitHub pull requests, i.e. refs/pull/*
if strings.HasPrefix(result.refName, "refs/pull/") {
continue
}
// Create reference
if result.oldCommitID == gitShortEmptySha {
if err = SyncCreateAction(m.Repo, result.refName); err != nil {
log.Error("SyncCreateAction [repo_id: %d]: %v", m.RepoID, err)
}
continue
}
// Delete reference
if result.newCommitID == gitShortEmptySha {
if err = SyncDeleteAction(m.Repo, result.refName); err != nil {
log.Error("SyncDeleteAction [repo_id: %d]: %v", m.RepoID, err)
}
continue
}
// Push commits
oldCommitID, err := git.GetFullCommitID(gitRepo.Path, result.oldCommitID)
if err != nil {
log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
continue
}
newCommitID, err := git.GetFullCommitID(gitRepo.Path, result.newCommitID)
if err != nil {
log.Error("GetFullCommitID [%d]: %v", m.RepoID, err)
continue
}
commits, err := gitRepo.CommitsBetweenIDs(newCommitID, oldCommitID)
if err != nil {
log.Error("CommitsBetweenIDs [repo_id: %d, new_commit_id: %s, old_commit_id: %s]: %v", m.RepoID, newCommitID, oldCommitID, err)
continue
}
if err = SyncPushAction(m.Repo, SyncPushActionOptions{
RefName: result.refName,
OldCommitID: oldCommitID,
NewCommitID: newCommitID,
Commits: models.ListToPushCommits(commits),
}); err != nil {
log.Error("SyncPushAction [repo_id: %d]: %v", m.RepoID, err)
continue
}
}
// Get latest commit date and update to current repository updated time
commitDate, err := git.GetLatestCommitTime(m.Repo.RepoPath())
if err != nil {
log.Error("GetLatestCommitDate [%d]: %v", m.RepoID, err)
return
}
if err = models.UpdateRepositoryUpdatedTime(m.RepoID, commitDate); err != nil {
log.Error("Update repository 'updated_unix' [%d]: %v", m.RepoID, err)
return
}
}
// InitSyncMirrors initializes a go routine to sync the mirrors
func InitSyncMirrors() {
go SyncMirrors()
}
// StartToMirror adds repoID to mirror queue
func StartToMirror(repoID int64) {
go mirrorQueue.Add(repoID)
}