mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-11-30 22:06:11 +01:00
157b405753
* clean git support for ver < 2.0 * fine tune tests for markup (which requires git module) * remove unnecessary comments * try to fix tests * try test again * use const for GitVersionRequired instead of var * try to fix integration test * Refactor CheckAttributeReader to make a *git.Repository version * update document for commit signing with Gitea's internal gitconfig * update document for commit signing with Gitea's internal gitconfig Co-authored-by: Andrew Thornton <art27@cantab.net> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
361 lines
11 KiB
Go
361 lines
11 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
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// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package git
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"runtime"
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"strings"
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"sync"
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"time"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"github.com/hashicorp/go-version"
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)
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// GitVersionRequired is the minimum Git version required
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const GitVersionRequired = "2.0.0"
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var (
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// GitExecutable is the command name of git
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// Could be updated to an absolute path while initialization
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GitExecutable = "git"
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// DefaultContext is the default context to run git commands in, must be initialized by git.InitXxx
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DefaultContext context.Context
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// SupportProcReceive version >= 2.29.0
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SupportProcReceive bool
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gitVersion *version.Version
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)
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// loadGitVersion returns current Git version from shell. Internal usage only.
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func loadGitVersion() (*version.Version, error) {
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// doesn't need RWMutex because its exec by Init()
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if gitVersion != nil {
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return gitVersion, nil
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}
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stdout, _, runErr := NewCommand(DefaultContext, "version").RunStdString(nil)
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if runErr != nil {
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return nil, runErr
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}
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fields := strings.Fields(stdout)
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if len(fields) < 3 {
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return nil, fmt.Errorf("invalid git version output: %s", stdout)
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}
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var versionString string
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// Handle special case on Windows.
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i := strings.Index(fields[2], "windows")
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if i >= 1 {
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versionString = fields[2][:i-1]
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} else {
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versionString = fields[2]
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}
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var err error
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gitVersion, err = version.NewVersion(versionString)
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return gitVersion, err
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}
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// SetExecutablePath changes the path of git executable and checks the file permission and version.
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func SetExecutablePath(path string) error {
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// If path is empty, we use the default value of GitExecutable "git" to search for the location of git.
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if path != "" {
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GitExecutable = path
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}
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absPath, err := exec.LookPath(GitExecutable)
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if err != nil {
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return fmt.Errorf("git not found: %w", err)
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}
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GitExecutable = absPath
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_, err = loadGitVersion()
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if err != nil {
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return fmt.Errorf("unable to load git version: %w", err)
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}
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versionRequired, err := version.NewVersion(GitVersionRequired)
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if err != nil {
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return err
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}
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if gitVersion.LessThan(versionRequired) {
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moreHint := "get git: https://git-scm.com/download/"
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if runtime.GOOS == "linux" {
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// there are a lot of CentOS/RHEL users using old git, so we add a special hint for them
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if _, err = os.Stat("/etc/redhat-release"); err == nil {
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// ius.io is the recommended official(git-scm.com) method to install git
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moreHint = "get git: https://git-scm.com/download/linux and https://ius.io"
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}
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}
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return fmt.Errorf("installed git version %q is not supported, Gitea requires git version >= %q, %s", gitVersion.Original(), GitVersionRequired, moreHint)
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}
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return nil
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}
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// VersionInfo returns git version information
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func VersionInfo() string {
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if gitVersion == nil {
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return "(git not found)"
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}
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format := "%s"
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args := []interface{}{gitVersion.Original()}
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// Since git wire protocol has been released from git v2.18
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if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
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format += ", Wire Protocol %s Enabled"
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args = append(args, "Version 2") // for focus color
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}
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return fmt.Sprintf(format, args...)
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}
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func checkInit() error {
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if setting.RepoRootPath == "" {
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return errors.New("can not init Git's HomeDir (RepoRootPath is empty), the setting and git modules are not initialized correctly")
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}
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if DefaultContext != nil {
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log.Warn("git module has been initialized already, duplicate init should be fixed")
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}
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return nil
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}
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// HomeDir is the home dir for git to store the global config file used by Gitea internally
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func HomeDir() string {
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if setting.RepoRootPath == "" {
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// strict check, make sure the git module is initialized correctly.
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// attention: when the git module is called in gitea sub-command (serv/hook), the log module is not able to show messages to users.
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// 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.
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log.Fatal("can not get Git's HomeDir (RepoRootPath is empty), the setting and git modules are not initialized correctly")
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return ""
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}
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return setting.RepoRootPath
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}
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// InitSimple initializes git module with a very simple step, no config changes, no global command arguments.
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// This method doesn't change anything to filesystem. At the moment, it is only used by "git serv" sub-command, no data-race
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// However, in integration test, the sub-command function may be called in the current process, so the InitSimple would be called multiple times, too
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func InitSimple(ctx context.Context) error {
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if err := checkInit(); err != nil {
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return err
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}
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DefaultContext = ctx
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if setting.Git.Timeout.Default > 0 {
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defaultCommandExecutionTimeout = time.Duration(setting.Git.Timeout.Default) * time.Second
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}
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return SetExecutablePath(setting.Git.Path)
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}
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var initOnce sync.Once
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// InitOnceWithSync initializes git module with version check and change global variables, sync gitconfig.
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// This method will update the global variables ONLY ONCE (just like git.CheckLFSVersion -- which is not ideal too),
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// otherwise there will be data-race problem at the moment.
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func InitOnceWithSync(ctx context.Context) (err error) {
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if err = checkInit(); err != nil {
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return err
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}
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initOnce.Do(func() {
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err = InitSimple(ctx)
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if err != nil {
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return
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}
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// Since git wire protocol has been released from git v2.18
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if setting.Git.EnableAutoGitWireProtocol && CheckGitVersionAtLeast("2.18") == nil {
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globalCommandArgs = append(globalCommandArgs, "-c", "protocol.version=2")
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}
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// By default partial clones are disabled, enable them from git v2.22
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if !setting.Git.DisablePartialClone && CheckGitVersionAtLeast("2.22") == nil {
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globalCommandArgs = append(globalCommandArgs, "-c", "uploadpack.allowfilter=true", "-c", "uploadpack.allowAnySHA1InWant=true")
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}
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// Explicitly disable credential helper, otherwise Git credentials might leak
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if CheckGitVersionAtLeast("2.9") == nil {
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globalCommandArgs = append(globalCommandArgs, "-c", "credential.helper=")
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}
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SupportProcReceive = CheckGitVersionAtLeast("2.29") == nil
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})
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if err != nil {
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return err
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}
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return syncGitConfig()
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}
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// syncGitConfig only modifies gitconfig, won't change global variables (otherwise there will be data-race problem)
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func syncGitConfig() (err error) {
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if err = os.MkdirAll(HomeDir(), os.ModePerm); err != nil {
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return fmt.Errorf("unable to create directory %s, err: %w", setting.RepoRootPath, err)
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}
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// Git requires setting user.name and user.email in order to commit changes - old comment: "if they're not set just add some defaults"
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// 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.
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// If these values are not really used, then they can be set (overwritten) directly without considering about existence.
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for configKey, defaultValue := range map[string]string{
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"user.name": "Gitea",
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"user.email": "gitea@fake.local",
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} {
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if err := configSetNonExist(configKey, defaultValue); err != nil {
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return err
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}
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}
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// Set git some configurations - these must be set to these values for gitea to work correctly
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if err := configSet("core.quotePath", "false"); err != nil {
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return err
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}
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if CheckGitVersionAtLeast("2.10") == nil {
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if err := configSet("receive.advertisePushOptions", "true"); err != nil {
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return err
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}
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}
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if CheckGitVersionAtLeast("2.18") == nil {
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if err := configSet("core.commitGraph", "true"); err != nil {
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return err
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}
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if err := configSet("gc.writeCommitGraph", "true"); err != nil {
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return err
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}
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}
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if SupportProcReceive {
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// set support for AGit flow
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if err := configAddNonExist("receive.procReceiveRefs", "refs/for"); err != nil {
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return err
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}
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} else {
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if err := configUnsetAll("receive.procReceiveRefs", "refs/for"); err != nil {
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return err
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}
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}
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if runtime.GOOS == "windows" {
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if err := configSet("core.longpaths", "true"); err != nil {
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return err
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}
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if setting.Git.DisableCoreProtectNTFS {
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err = configSet("core.protectNTFS", "false")
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} else {
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err = configUnsetAll("core.protectNTFS", "false")
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}
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if err != nil {
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return err
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}
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}
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return nil
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}
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// CheckGitVersionAtLeast check git version is at least the constraint version
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func CheckGitVersionAtLeast(atLeast string) error {
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if _, err := loadGitVersion(); err != nil {
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return err
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}
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atLeastVersion, err := version.NewVersion(atLeast)
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if err != nil {
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return err
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}
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if gitVersion.Compare(atLeastVersion) < 0 {
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return fmt.Errorf("installed git binary version %s is not at least %s", gitVersion.Original(), atLeast)
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}
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return nil
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}
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func configSet(key, value string) error {
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stdout, _, err := NewCommand(DefaultContext, "config", "--get", key).RunStdString(nil)
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if err != nil && !err.IsExitCode(1) {
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return fmt.Errorf("failed to get git config %s, err: %w", key, err)
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}
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currValue := strings.TrimSpace(stdout)
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if currValue == value {
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return nil
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}
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_, _, err = NewCommand(DefaultContext, "config", "--global", key, value).RunStdString(nil)
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if err != nil {
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return fmt.Errorf("failed to set git global config %s, err: %w", key, err)
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}
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return nil
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}
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func configSetNonExist(key, value string) error {
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_, _, err := NewCommand(DefaultContext, "config", "--get", key).RunStdString(nil)
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if err == nil {
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// already exist
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return nil
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}
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if err.IsExitCode(1) {
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// not exist, set new config
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_, _, err = NewCommand(DefaultContext, "config", "--global", key, value).RunStdString(nil)
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if err != nil {
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return fmt.Errorf("failed to set git global config %s, err: %w", key, err)
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}
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return nil
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}
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return fmt.Errorf("failed to get git config %s, err: %w", key, err)
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}
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func configAddNonExist(key, value string) error {
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_, _, err := NewCommand(DefaultContext, "config", "--fixed-value", "--get", key, value).RunStdString(nil)
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if err == nil {
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// already exist
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return nil
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}
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if err.IsExitCode(1) {
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// not exist, add new config
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_, _, err = NewCommand(DefaultContext, "config", "--global", "--add", key, value).RunStdString(nil)
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if err != nil {
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return fmt.Errorf("failed to add git global config %s, err: %w", key, err)
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}
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return nil
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}
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return fmt.Errorf("failed to get git config %s, err: %w", key, err)
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}
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func configUnsetAll(key, value string) error {
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_, _, err := NewCommand(DefaultContext, "config", "--get", key).RunStdString(nil)
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if err == nil {
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// exist, need to remove
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_, _, err = NewCommand(DefaultContext, "config", "--global", "--fixed-value", "--unset-all", key, value).RunStdString(nil)
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if err != nil {
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return fmt.Errorf("failed to unset git global config %s, err: %w", key, err)
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}
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return nil
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}
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if err.IsExitCode(1) {
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// not exist
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return nil
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}
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return fmt.Errorf("failed to get git config %s, err: %w", key, err)
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}
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// Fsck verifies the connectivity and validity of the objects in the database
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func Fsck(ctx context.Context, repoPath string, timeout time.Duration, args ...string) error {
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return NewCommand(ctx, "fsck").AddArguments(args...).Run(&RunOpts{Timeout: timeout, Dir: repoPath})
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}
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