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Refactor legacy git init (#20376)

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* merge `CheckLFSVersion` into `InitFull` (renamed from `InitWithSyncOnce`)
* remove the `Once` during git init, no data-race now
* for doctor sub-commands, `InitFull` should only be called in initialization stage

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
wxiaoguang
2022-08-09 11:22:24 +08:00
committed by GitHub
parent 820031e556
commit 75d96f4a02
14 changed files with 63 additions and 149 deletions
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3
modules/doctor/mergebase.go
View File

@@ -30,9 +30,6 @@ func iteratePRs(ctx context.Context, repo *repo_model.Repository, each func(*rep
}
func checkPRMergeBase(ctx context.Context, logger log.Logger, autofix bool) error {
if err := git.InitOnceWithSync(ctx); err != nil {
return err
}
numRepos := 0
numPRs := 0
numPRsUpdated := 0

4
modules/doctor/misc.go
View File

@@ -190,10 +190,6 @@ func checkDaemonExport(ctx context.Context, logger log.Logger, autofix bool) err
}
func checkCommitGraph(ctx context.Context, logger log.Logger, autofix bool) error {
if err := git.InitOnceWithSync(ctx); err != nil {
return err
}
numRepos := 0
numNeedUpdate := 0
numWritten := 0

89
modules/git/git.go
View File

@@ -15,7 +15,6 @@ import (
"regexp"
"runtime"
"strings"
"sync"
"time"
"code.gitea.io/gitea/modules/log"
@@ -24,8 +23,8 @@ import (
"github.com/hashicorp/go-version"
)
// GitVersionRequired is the minimum Git version required
const GitVersionRequired = "2.0.0"
// RequiredVersion is the minimum Git version required
const RequiredVersion = "2.0.0"
var (
// GitExecutable is the command name of git
@@ -43,7 +42,7 @@ var (
// loadGitVersion returns current Git version from shell. Internal usage only.
func loadGitVersion() (*version.Version, error) {
// doesn't need RWMutex because its exec by Init()
// doesn't need RWMutex because it's executed by Init()
if gitVersion != nil {
return gitVersion, nil
}
@@ -90,7 +89,7 @@ func SetExecutablePath(path string) error {
return fmt.Errorf("unable to load git version: %w", err)
}
versionRequired, err := version.NewVersion(GitVersionRequired)
versionRequired, err := version.NewVersion(RequiredVersion)
if err != nil {
return err
}
@@ -104,7 +103,7 @@ func SetExecutablePath(path string) error {
moreHint = "get git: https://git-scm.com/download/linux and https://ius.io"
}
}
return fmt.Errorf("installed git version %q is not supported, Gitea requires git version >= %q, %s", gitVersion.Original(), GitVersionRequired, moreHint)
return fmt.Errorf("installed git version %q is not supported, Gitea requires git version >= %q, %s", gitVersion.Original(), RequiredVersion, moreHint)
}
return nil
@@ -131,7 +130,7 @@ func checkInit() error {
return errors.New("unable to init Git's HomeDir, incorrect initialization of the setting and git modules")
}
if DefaultContext != nil {
log.Warn("git module has been initialized already, duplicate init should be fixed")
log.Warn("git module has been initialized already, duplicate init may work but it's better to fix it")
}
return nil
}
@@ -140,7 +139,7 @@ func checkInit() error {
func HomeDir() string {
if setting.Git.HomePath == "" {
// strict check, make sure the git module is initialized correctly.
// attention: when the git module is called in gitea sub-command (serv/hook), the log module is not able to show messages to users.
// attention: when the git module is called in gitea sub-command (serv/hook), the log module might not obviously show messages to users/developers.
// for example: if there is gitea git hook code calling git.NewCommand before git.InitXxx, the integration test won't show the real failure reasons.
log.Fatal("Unable to init Git's HomeDir, incorrect initialization of the setting and git modules")
return ""
@@ -149,14 +148,14 @@ func HomeDir() string {
}
// InitSimple initializes git module with a very simple step, no config changes, no global command arguments.
// This method doesn't change anything to filesystem. At the moment, it is only used by "git serv" sub-command, no data-race
// However, in integration test, the sub-command function may be called in the current process, so the InitSimple would be called multiple times, too
// This method doesn't change anything to filesystem. At the moment, it is only used by some Gitea sub-commands.
func InitSimple(ctx context.Context) error {
if err := checkInit(); err != nil {
return err
}
DefaultContext = ctx
globalCommandArgs = nil
if setting.Git.Timeout.Default > 0 {
defaultCommandExecutionTimeout = time.Duration(setting.Git.Timeout.Default) * time.Second
@@ -165,46 +164,46 @@ func InitSimple(ctx context.Context) error {
return SetExecutablePath(setting.Git.Path)
}
var initOnce sync.Once
// InitOnceWithSync initializes git module with version check and change global variables, sync gitconfig.
// This method will update the global variables ONLY ONCE (just like git.CheckLFSVersion -- which is not ideal too),
// otherwise there will be data-race problem at the moment.
func InitOnceWithSync(ctx context.Context) (err error) {
// InitFull initializes git module with version check and change global variables, sync gitconfig.
// It should only be called once at the beginning of the program initialization (TestMain/GlobalInitInstalled) as this code makes unsynchronized changes to variables.
func InitFull(ctx context.Context) (err error) {
if err = checkInit(); err != nil {
return err
}
initOnce.Do(func() {
if err = InitSimple(ctx); err != nil {
return
}
// when git works with gnupg (commit signing), there should be a stable home for gnupg commands
if _, ok := os.LookupEnv("GNUPGHOME"); !ok {
_ = os.Setenv("GNUPGHOME", filepath.Join(HomeDir(), ".gnupg"))
}
// Since git wire protocol has been released from git v2.18
if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
globalCommandArgs = append(globalCommandArgs, "-c", "protocol.version=2")
}
// By default partial clones are disabled, enable them from git v2.22
if !setting.Git.DisablePartialClone && CheckGitVersionAtLeast("2.22") == nil {
globalCommandArgs = append(globalCommandArgs, "-c", "uploadpack.allowfilter=true", "-c", "uploadpack.allowAnySHA1InWant=true")
}
// Explicitly disable credential helper, otherwise Git credentials might leak
if CheckGitVersionAtLeast("2.9") == nil {
globalCommandArgs = append(globalCommandArgs, "-c", "credential.helper=")
}
SupportProcReceive = CheckGitVersionAtLeast("2.29") == nil
})
if err != nil {
return err
if err = InitSimple(ctx); err != nil {
return
}
// when git works with gnupg (commit signing), there should be a stable home for gnupg commands
if _, ok := os.LookupEnv("GNUPGHOME"); !ok {
_ = os.Setenv("GNUPGHOME", filepath.Join(HomeDir(), ".gnupg"))
}
// Since git wire protocol has been released from git v2.18
if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
globalCommandArgs = append(globalCommandArgs, "-c", "protocol.version=2")
}
// By default partial clones are disabled, enable them from git v2.22
if !setting.Git.DisablePartialClone && CheckGitVersionAtLeast("2.22") == nil {
globalCommandArgs = append(globalCommandArgs, "-c", "uploadpack.allowfilter=true", "-c", "uploadpack.allowAnySHA1InWant=true")
}
// Explicitly disable credential helper, otherwise Git credentials might leak
if CheckGitVersionAtLeast("2.9") == nil {
globalCommandArgs = append(globalCommandArgs, "-c", "credential.helper=")
}
SupportProcReceive = CheckGitVersionAtLeast("2.29") == nil
if setting.LFS.StartServer {
if CheckGitVersionAtLeast("2.1.2") != nil {
return errors.New("LFS server support requires Git >= 2.1.2")
}
globalCommandArgs = append(globalCommandArgs, "-c", "filter.lfs.required=", "-c", "filter.lfs.smudge=", "-c", "filter.lfs.clean=")
}
return syncGitConfig()
}

2
modules/git/git_test.go
View File

@@ -28,7 +28,7 @@ func testRun(m *testing.M) error {
defer util.RemoveAll(gitHomePath)
setting.Git.HomePath = gitHomePath
if err = InitOnceWithSync(context.Background()); err != nil {
if err = InitFull(context.Background()); err != nil {
return fmt.Errorf("failed to call Init: %w", err)
}

31
modules/git/lfs.go
View File

@@ -1,31 +0,0 @@
// Copyright 2021 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 git
import (
"sync"
logger "code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
var once sync.Once
// CheckLFSVersion will check lfs version, if not satisfied, then disable it.
func CheckLFSVersion() {
if setting.LFS.StartServer {
// Disable LFS client hooks if installed for the current OS user
// Needs at least git v2.1.2
if CheckGitVersionAtLeast("2.1.2") != nil {
setting.LFS.StartServer = false
logger.Error("LFS server support needs at least Git v2.1.2")
} else {
once.Do(func() {
globalCommandArgs = append(globalCommandArgs, "-c", "filter.lfs.required=",
"-c", "filter.lfs.smudge=", "-c", "filter.lfs.clean=")
})
}
}
}