mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-12-12 22:41:59 +01:00
757b4c17e9
This PR adds support for reflogs on all repositories. It does this by adding a global configuration entry. Implements #14865 --------- Signed-off-by: Philip Peterson <philip.c.peterson@gmail.com> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
415 lines
14 KiB
Go
415 lines
14 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
|
|
// Copyright 2017 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package git
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"regexp"
|
|
"runtime"
|
|
"strings"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"github.com/hashicorp/go-version"
|
|
)
|
|
|
|
// RequiredVersion is the minimum Git version required
|
|
const RequiredVersion = "2.0.0"
|
|
|
|
var (
|
|
// GitExecutable is the command name of git
|
|
// Could be updated to an absolute path while initialization
|
|
GitExecutable = "git"
|
|
|
|
// DefaultContext is the default context to run git commands in, must be initialized by git.InitXxx
|
|
DefaultContext context.Context
|
|
|
|
// SupportProcReceive version >= 2.29.0
|
|
SupportProcReceive bool
|
|
|
|
gitVersion *version.Version
|
|
)
|
|
|
|
// loadGitVersion returns current Git version from shell. Internal usage only.
|
|
func loadGitVersion() (*version.Version, error) {
|
|
// doesn't need RWMutex because it's executed by Init()
|
|
if gitVersion != nil {
|
|
return gitVersion, nil
|
|
}
|
|
|
|
stdout, _, runErr := NewCommand(DefaultContext, "version").RunStdString(nil)
|
|
if runErr != nil {
|
|
return nil, runErr
|
|
}
|
|
|
|
fields := strings.Fields(stdout)
|
|
if len(fields) < 3 {
|
|
return nil, fmt.Errorf("invalid git version output: %s", stdout)
|
|
}
|
|
|
|
var versionString string
|
|
|
|
// Handle special case on Windows.
|
|
i := strings.Index(fields[2], "windows")
|
|
if i >= 1 {
|
|
versionString = fields[2][:i-1]
|
|
} else {
|
|
versionString = fields[2]
|
|
}
|
|
|
|
var err error
|
|
gitVersion, err = version.NewVersion(versionString)
|
|
return gitVersion, err
|
|
}
|
|
|
|
// SetExecutablePath changes the path of git executable and checks the file permission and version.
|
|
func SetExecutablePath(path string) error {
|
|
// If path is empty, we use the default value of GitExecutable "git" to search for the location of git.
|
|
if path != "" {
|
|
GitExecutable = path
|
|
}
|
|
absPath, err := exec.LookPath(GitExecutable)
|
|
if err != nil {
|
|
return fmt.Errorf("git not found: %w", err)
|
|
}
|
|
GitExecutable = absPath
|
|
|
|
_, err = loadGitVersion()
|
|
if err != nil {
|
|
return fmt.Errorf("unable to load git version: %w", err)
|
|
}
|
|
|
|
versionRequired, err := version.NewVersion(RequiredVersion)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if gitVersion.LessThan(versionRequired) {
|
|
moreHint := "get git: https://git-scm.com/download/"
|
|
if runtime.GOOS == "linux" {
|
|
// there are a lot of CentOS/RHEL users using old git, so we add a special hint for them
|
|
if _, err = os.Stat("/etc/redhat-release"); err == nil {
|
|
// ius.io is the recommended official(git-scm.com) method to install git
|
|
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(), RequiredVersion, moreHint)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// VersionInfo returns git version information
|
|
func VersionInfo() string {
|
|
if gitVersion == nil {
|
|
return "(git not found)"
|
|
}
|
|
format := "%s"
|
|
args := []interface{}{gitVersion.Original()}
|
|
// Since git wire protocol has been released from git v2.18
|
|
if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
|
|
format += ", Wire Protocol %s Enabled"
|
|
args = append(args, "Version 2") // for focus color
|
|
}
|
|
|
|
return fmt.Sprintf(format, args...)
|
|
}
|
|
|
|
func checkInit() error {
|
|
if setting.Git.HomePath == "" {
|
|
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 may work but it's better to fix it")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// HomeDir is the home dir for git to store the global config file used by Gitea internally
|
|
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 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 ""
|
|
}
|
|
return setting.Git.HomePath
|
|
}
|
|
|
|
// 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 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
|
|
}
|
|
|
|
return SetExecutablePath(setting.Git.Path)
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
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")
|
|
}
|
|
|
|
// 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()
|
|
}
|
|
|
|
func enableReflogs() error {
|
|
if err := configSet("core.logAllRefUpdates", "true"); err != nil {
|
|
return err
|
|
}
|
|
err := configSet("gc.reflogExpire", fmt.Sprintf("%d", setting.Git.Reflog.Expiration))
|
|
return err
|
|
}
|
|
|
|
func disableReflogs() error {
|
|
if err := configUnsetAll("core.logAllRefUpdates", "true"); err != nil {
|
|
return err
|
|
} else if err := configUnsetAll("gc.reflogExpire", ""); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// syncGitConfig only modifies gitconfig, won't change global variables (otherwise there will be data-race problem)
|
|
func syncGitConfig() (err error) {
|
|
if err = os.MkdirAll(HomeDir(), os.ModePerm); err != nil {
|
|
return fmt.Errorf("unable to prepare git home directory %s, err: %w", HomeDir(), err)
|
|
}
|
|
|
|
// Git requires setting user.name and user.email in order to commit changes - old comment: "if they're not set just add some defaults"
|
|
// TODO: need to confirm whether users really need to change these values manually. It seems that these values are dummy only and not really used.
|
|
// If these values are not really used, then they can be set (overwritten) directly without considering about existence.
|
|
for configKey, defaultValue := range map[string]string{
|
|
"user.name": "Gitea",
|
|
"user.email": "gitea@fake.local",
|
|
} {
|
|
if err := configSetNonExist(configKey, defaultValue); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Set git some configurations - these must be set to these values for gitea to work correctly
|
|
if err := configSet("core.quotePath", "false"); err != nil {
|
|
return err
|
|
}
|
|
|
|
if setting.Git.Reflog.Enabled {
|
|
if err := enableReflogs(); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if err := disableReflogs(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if CheckGitVersionAtLeast("2.10") == nil {
|
|
if err := configSet("receive.advertisePushOptions", "true"); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if CheckGitVersionAtLeast("2.18") == nil {
|
|
if err := configSet("core.commitGraph", "true"); err != nil {
|
|
return err
|
|
}
|
|
if err := configSet("gc.writeCommitGraph", "true"); err != nil {
|
|
return err
|
|
}
|
|
if err := configSet("fetch.writeCommitGraph", "true"); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if SupportProcReceive {
|
|
// set support for AGit flow
|
|
if err := configAddNonExist("receive.procReceiveRefs", "refs/for"); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if err := configUnsetAll("receive.procReceiveRefs", "refs/for"); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Due to CVE-2022-24765, git now denies access to git directories which are not owned by current user
|
|
// however, some docker users and samba users find it difficult to configure their systems so that Gitea's git repositories are owned by the Gitea user. (Possibly Windows Service users - but ownership in this case should really be set correctly on the filesystem.)
|
|
// see issue: https://github.com/go-gitea/gitea/issues/19455
|
|
// Fundamentally the problem lies with the uid-gid-mapping mechanism for filesystems in docker on windows (and to a lesser extent samba).
|
|
// Docker's configuration mechanism for local filesystems provides no way of setting this mapping and although there is a mechanism for setting this uid through using cifs mounting it is complicated and essentially undocumented
|
|
// Thus the owner uid/gid for files on these filesystems will be marked as root.
|
|
// As Gitea now always use its internal git config file, and access to the git repositories is managed through Gitea,
|
|
// it is now safe to set "safe.directory=*" for internal usage only.
|
|
// Please note: the wildcard "*" is only supported by Git 2.30.4/2.31.3/2.32.2/2.33.3/2.34.3/2.35.3/2.36 and later
|
|
// Although only supported by Git 2.30.4/2.31.3/2.32.2/2.33.3/2.34.3/2.35.3/2.36 and later - this setting is tolerated by earlier versions
|
|
if err := configAddNonExist("safe.directory", "*"); err != nil {
|
|
return err
|
|
}
|
|
if runtime.GOOS == "windows" {
|
|
if err := configSet("core.longpaths", "true"); err != nil {
|
|
return err
|
|
}
|
|
if setting.Git.DisableCoreProtectNTFS {
|
|
err = configSet("core.protectNTFS", "false")
|
|
} else {
|
|
err = configUnsetAll("core.protectNTFS", "false")
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// By default partial clones are disabled, enable them from git v2.22
|
|
if !setting.Git.DisablePartialClone && CheckGitVersionAtLeast("2.22") == nil {
|
|
if err = configSet("uploadpack.allowfilter", "true"); err != nil {
|
|
return err
|
|
}
|
|
err = configSet("uploadpack.allowAnySHA1InWant", "true")
|
|
} else {
|
|
if err = configUnsetAll("uploadpack.allowfilter", "true"); err != nil {
|
|
return err
|
|
}
|
|
err = configUnsetAll("uploadpack.allowAnySHA1InWant", "true")
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// CheckGitVersionAtLeast check git version is at least the constraint version
|
|
func CheckGitVersionAtLeast(atLeast string) error {
|
|
if _, err := loadGitVersion(); err != nil {
|
|
return err
|
|
}
|
|
atLeastVersion, err := version.NewVersion(atLeast)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if gitVersion.Compare(atLeastVersion) < 0 {
|
|
return fmt.Errorf("installed git binary version %s is not at least %s", gitVersion.Original(), atLeast)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func configSet(key, value string) error {
|
|
stdout, _, err := NewCommand(DefaultContext, "config", "--global", "--get").AddDynamicArguments(key).RunStdString(nil)
|
|
if err != nil && !err.IsExitCode(1) {
|
|
return fmt.Errorf("failed to get git config %s, err: %w", key, err)
|
|
}
|
|
|
|
currValue := strings.TrimSpace(stdout)
|
|
if currValue == value {
|
|
return nil
|
|
}
|
|
|
|
_, _, err = NewCommand(DefaultContext, "config", "--global").AddDynamicArguments(key, value).RunStdString(nil)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to set git global config %s, err: %w", key, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func configSetNonExist(key, value string) error {
|
|
_, _, err := NewCommand(DefaultContext, "config", "--global", "--get").AddDynamicArguments(key).RunStdString(nil)
|
|
if err == nil {
|
|
// already exist
|
|
return nil
|
|
}
|
|
if err.IsExitCode(1) {
|
|
// not exist, set new config
|
|
_, _, err = NewCommand(DefaultContext, "config", "--global").AddDynamicArguments(key, value).RunStdString(nil)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to set git global config %s, err: %w", key, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
return fmt.Errorf("failed to get git config %s, err: %w", key, err)
|
|
}
|
|
|
|
func configAddNonExist(key, value string) error {
|
|
_, _, err := NewCommand(DefaultContext, "config", "--global", "--get").AddDynamicArguments(key, regexp.QuoteMeta(value)).RunStdString(nil)
|
|
if err == nil {
|
|
// already exist
|
|
return nil
|
|
}
|
|
if err.IsExitCode(1) {
|
|
// not exist, add new config
|
|
_, _, err = NewCommand(DefaultContext, "config", "--global", "--add").AddDynamicArguments(key, value).RunStdString(nil)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to add git global config %s, err: %w", key, err)
|
|
}
|
|
return nil
|
|
}
|
|
return fmt.Errorf("failed to get git config %s, err: %w", key, err)
|
|
}
|
|
|
|
func configUnsetAll(key, value string) error {
|
|
_, _, err := NewCommand(DefaultContext, "config", "--global", "--get").AddDynamicArguments(key).RunStdString(nil)
|
|
if err == nil {
|
|
// exist, need to remove
|
|
_, _, err = NewCommand(DefaultContext, "config", "--global", "--unset-all").AddDynamicArguments(key, regexp.QuoteMeta(value)).RunStdString(nil)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to unset git global config %s, err: %w", key, err)
|
|
}
|
|
return nil
|
|
}
|
|
if err.IsExitCode(1) {
|
|
// not exist
|
|
return nil
|
|
}
|
|
return fmt.Errorf("failed to get git config %s, err: %w", key, err)
|
|
}
|
|
|
|
// Fsck verifies the connectivity and validity of the objects in the database
|
|
func Fsck(ctx context.Context, repoPath string, timeout time.Duration, args TrustedCmdArgs) error {
|
|
return NewCommand(ctx, "fsck").AddArguments(args...).Run(&RunOpts{Timeout: timeout, Dir: repoPath})
|
|
}
|