gitea/modules/git/git.go
zeripath 01b9d35f1a
Disable core.protectNTFS (#17300)
core.protectNTFS protects NTFS from files which may be difficult to remove or interact
with using the win32 api, however, it also appears to prevent such files from
being entered into the git indexes - fundamentally causing breakages with PRs that
affect these files. However, deliberately setting this to false may cause security
issues due to the remain sparse checkout of files in the merge pipeline.

The only sensible option therefore is to provide an optional setting which admins
could set which would forcibly switch this off if they are affected by this issue.

Fix #17092

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-10-13 14:20:11 -04:00

311 lines
8.9 KiB
Go

// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2017 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 (
"context"
"fmt"
"os/exec"
"runtime"
"strings"
"time"
"code.gitea.io/gitea/modules/process"
"code.gitea.io/gitea/modules/setting"
"github.com/hashicorp/go-version"
)
var (
// Prefix the log prefix
Prefix = "[git-module] "
// GitVersionRequired is the minimum Git version required
GitVersionRequired = "1.7.2"
// 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
// will be overwritten by Init with HammerContext
DefaultContext = context.Background()
gitVersion *version.Version
// will be checked on Init
goVersionLessThan115 = true
// SupportProcReceive version >= 2.29.0
SupportProcReceive bool
)
// LocalVersion returns current Git version from shell.
func LocalVersion() (*version.Version, error) {
if err := LoadGitVersion(); err != nil {
return nil, err
}
return gitVersion, nil
}
// LoadGitVersion returns current Git version from shell.
func LoadGitVersion() error {
// doesn't need RWMutex because its exec by Init()
if gitVersion != nil {
return nil
}
stdout, err := NewCommand("version").Run()
if err != nil {
return err
}
fields := strings.Fields(stdout)
if len(fields) < 3 {
return fmt.Errorf("not enough 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]
}
gitVersion, err = version.NewVersion(versionString)
return 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: %v", err)
}
GitExecutable = absPath
err = LoadGitVersion()
if err != nil {
return fmt.Errorf("Git version missing: %v", err)
}
versionRequired, err := version.NewVersion(GitVersionRequired)
if err != nil {
return err
}
if gitVersion.LessThan(versionRequired) {
return fmt.Errorf("Git version not supported. Requires version > %v", GitVersionRequired)
}
return nil
}
// VersionInfo returns git version information
func VersionInfo() string {
var format = "Git Version: %s"
var 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...)
}
// Init initializes git module
func Init(ctx context.Context) error {
DefaultContext = ctx
defaultCommandExecutionTimeout = time.Duration(setting.Git.Timeout.Default) * time.Second
if err := SetExecutablePath(setting.Git.Path); err != nil {
return err
}
// force cleanup args
GlobalCommandArgs = []string{}
if CheckGitVersionAtLeast("2.9") == nil {
// Explicitly disable credential helper, otherwise Git credentials might leak
GlobalCommandArgs = append(GlobalCommandArgs, "-c", "credential.helper=")
}
// 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")
}
// Save current git version on init to gitVersion otherwise it would require an RWMutex
if err := LoadGitVersion(); err != nil {
return err
}
// Save if the go version used to compile gitea is greater or equal 1.15
runtimeVersion, err := version.NewVersion(strings.TrimPrefix(runtime.Version(), "go"))
if err != nil {
return err
}
version115, _ := version.NewVersion("1.15")
goVersionLessThan115 = runtimeVersion.LessThan(version115)
// Git requires setting user.name and user.email in order to commit changes - if they're not set just add some defaults
for configKey, defaultValue := range map[string]string{"user.name": "Gitea", "user.email": "gitea@fake.local"} {
if err := checkAndSetConfig(configKey, defaultValue, false); err != nil {
return err
}
}
// Set git some configurations - these must be set to these values for gitea to work correctly
if err := checkAndSetConfig("core.quotePath", "false", true); err != nil {
return err
}
if CheckGitVersionAtLeast("2.10") == nil {
if err := checkAndSetConfig("receive.advertisePushOptions", "true", true); err != nil {
return err
}
}
if CheckGitVersionAtLeast("2.18") == nil {
if err := checkAndSetConfig("core.commitGraph", "true", true); err != nil {
return err
}
if err := checkAndSetConfig("gc.writeCommitGraph", "true", true); err != nil {
return err
}
}
if CheckGitVersionAtLeast("2.29") == nil {
// set support for AGit flow
if err := checkAndAddConfig("receive.procReceiveRefs", "refs/for"); err != nil {
return err
}
SupportProcReceive = true
} else {
if err := checkAndRemoveConfig("receive.procReceiveRefs", "refs/for"); err != nil {
return err
}
SupportProcReceive = false
}
if runtime.GOOS == "windows" {
if err := checkAndSetConfig("core.longpaths", "true", true); err != nil {
return err
}
}
if setting.Git.DisableCoreProtectNTFS {
if err := checkAndSetConfig("core.protectntfs", "false", true); err != nil {
return err
}
GlobalCommandArgs = append(GlobalCommandArgs, "-c", "core.protectntfs=false")
}
return nil
}
// 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 checkAndSetConfig(key, defaultValue string, forceToDefault bool) error {
stdout, stderr, err := process.GetManager().Exec("git.Init(get setting)", GitExecutable, "config", "--get", key)
if err != nil {
perr, ok := err.(*process.Error)
if !ok {
return fmt.Errorf("Failed to get git %s(%v) errType %T: %s", key, err, err, stderr)
}
eerr, ok := perr.Err.(*exec.ExitError)
if !ok || eerr.ExitCode() != 1 {
return fmt.Errorf("Failed to get git %s(%v) errType %T: %s", key, err, err, stderr)
}
}
currValue := strings.TrimSpace(stdout)
if currValue == defaultValue || (!forceToDefault && len(currValue) > 0) {
return nil
}
if _, stderr, err = process.GetManager().Exec(fmt.Sprintf("git.Init(set %s)", key), "git", "config", "--global", key, defaultValue); err != nil {
return fmt.Errorf("Failed to set git %s(%s): %s", key, err, stderr)
}
return nil
}
func checkAndAddConfig(key, value string) error {
_, stderr, err := process.GetManager().Exec("git.Init(get setting)", GitExecutable, "config", "--get", key, value)
if err != nil {
perr, ok := err.(*process.Error)
if !ok {
return fmt.Errorf("Failed to get git %s(%v) errType %T: %s", key, err, err, stderr)
}
eerr, ok := perr.Err.(*exec.ExitError)
if !ok || eerr.ExitCode() != 1 {
return fmt.Errorf("Failed to get git %s(%v) errType %T: %s", key, err, err, stderr)
}
if eerr.ExitCode() == 1 {
if _, stderr, err = process.GetManager().Exec(fmt.Sprintf("git.Init(set %s)", key), "git", "config", "--global", "--add", key, value); err != nil {
return fmt.Errorf("Failed to set git %s(%s): %s", key, err, stderr)
}
return nil
}
}
return nil
}
func checkAndRemoveConfig(key, value string) error {
_, stderr, err := process.GetManager().Exec("git.Init(get setting)", GitExecutable, "config", "--get", key, value)
if err != nil {
perr, ok := err.(*process.Error)
if !ok {
return fmt.Errorf("Failed to get git %s(%v) errType %T: %s", key, err, err, stderr)
}
eerr, ok := perr.Err.(*exec.ExitError)
if !ok || eerr.ExitCode() != 1 {
return fmt.Errorf("Failed to get git %s(%v) errType %T: %s", key, err, err, stderr)
}
if eerr.ExitCode() == 1 {
return nil
}
}
if _, stderr, err = process.GetManager().Exec(fmt.Sprintf("git.Init(set %s)", key), "git", "config", "--global", "--unset-all", key, value); err != nil {
return fmt.Errorf("Failed to set git %s(%s): %s", key, err, stderr)
}
return nil
}
// Fsck verifies the connectivity and validity of the objects in the database
func Fsck(ctx context.Context, repoPath string, timeout time.Duration, args ...string) error {
// Make sure timeout makes sense.
if timeout <= 0 {
timeout = -1
}
_, err := NewCommandContext(ctx, "fsck").AddArguments(args...).RunInDirTimeout(timeout, repoPath)
return err
}