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package commands
import (
"io/ioutil"
"os"
"path/filepath"
"strings"
"time"
"github.com/go-errors/errors"
gogit "github.com/jesseduffield/go-git/v5"
"github.com/jesseduffield/lazygit/pkg/commands/oscommands"
"github.com/jesseduffield/lazygit/pkg/commands/patch"
"github.com/jesseduffield/lazygit/pkg/config"
"github.com/jesseduffield/lazygit/pkg/env"
"github.com/jesseduffield/lazygit/pkg/i18n"
"github.com/jesseduffield/lazygit/pkg/utils"
"github.com/sirupsen/logrus"
)
// this takes something like:
// * (HEAD detached at 264fc6f5)
// remotes
// and returns '264fc6f5' as the second match
const CurrentBranchNameRegex = `(?m)^\*.*?([^ ]*?)\)?$`
// GitCommand is our main git interface
type GitCommand struct {
Log *logrus.Entry
OSCommand *oscommands.OSCommand
Repo *gogit.Repository
Tr *i18n.TranslationSet
Config config.AppConfigurer
getGitConfigValue func(string) (string, error)
removeFile func(string) error
DotGitDir string
onSuccessfulContinue func() error
PatchManager *patch.PatchManager
// Push to current determines whether the user has configured to push to the remote branch of the same name as the current or not
PushToCurrent bool
}
// NewGitCommand it runs git commands
func NewGitCommand(log *logrus.Entry, osCommand *oscommands.OSCommand, tr *i18n.TranslationSet, config config.AppConfigurer) (*GitCommand, error) {
var repo *gogit.Repository
// see what our default push behaviour is
output, err := osCommand.RunCommandWithOutput("git config --get push.default")
pushToCurrent := false
if err != nil {
log.Errorf("error reading git config: %v", err)
} else {
pushToCurrent = strings.TrimSpace(output) == "current"
}
if err := navigateToRepoRootDirectory(os.Stat, os.Chdir); err != nil {
return nil, err
}
if repo, err = setupRepository(gogit.PlainOpen, tr.GitconfigParseErr); err != nil {
return nil, err
}
dotGitDir, err := findDotGitDir(os.Stat, ioutil.ReadFile)
if err != nil {
return nil, err
}
gitCommand := &GitCommand{
Log: log,
OSCommand: osCommand,
Tr: tr,
Repo: repo,
Config: config,
getGitConfigValue: getGitConfigValue,
removeFile: os.RemoveAll,
DotGitDir: dotGitDir,
PushToCurrent: pushToCurrent,
}
gitCommand.PatchManager = patch.NewPatchManager(log, gitCommand.ApplyPatch, gitCommand.ShowFileDiff)
return gitCommand, nil
}
func navigateToRepoRootDirectory(stat func(string) (os.FileInfo, error), chdir func(string) error) error {
gitDir := env.GetGitDirEnv()
if gitDir != "" {
// we've been given the git directory explicitly so no need to navigate to it
_, err := stat(gitDir)
if err != nil {
return utils.WrapError(err)
}
return nil
}
// we haven't been given the git dir explicitly so we assume it's in the current working directory as `.git/` (or an ancestor directory)
for {
_, err := stat(".git")
if err == nil {
return nil
}
if !os.IsNotExist(err) {
return utils.WrapError(err)
}
if err = chdir(".."); err != nil {
return utils.WrapError(err)
}
currentPath, err := os.Getwd()
if err != nil {
return err
}
atRoot := currentPath == filepath.Dir(currentPath)
if atRoot {
// we should never really land here: the code that creates GitCommand should
// verify we're in a git directory
return errors.New("Must open lazygit in a git repository")
}
}
}
// resolvePath takes a path containing a symlink and returns the true path
func resolvePath(path string) (string, error) {
l, err := os.Lstat(path)
if err != nil {
return "", err
}
if l.Mode()&os.ModeSymlink == 0 {
return path, nil
}
return filepath.EvalSymlinks(path)
}
func setupRepository(openGitRepository func(string) (*gogit.Repository, error), gitConfigParseErrorStr string) (*gogit.Repository, error) {
unresolvedPath := env.GetGitDirEnv()
if unresolvedPath == "" {
var err error
unresolvedPath, err = os.Getwd()
if err != nil {
return nil, err
}
}
path, err := resolvePath(unresolvedPath)
if err != nil {
return nil, err
}
repository, err := openGitRepository(path)
if err != nil {
if strings.Contains(err.Error(), `unquoted '\' must be followed by new line`) {
return nil, errors.New(gitConfigParseErrorStr)
}
return nil, err
}
return repository, err
}
func findDotGitDir(stat func(string) (os.FileInfo, error), readFile func(filename string) ([]byte, error)) (string, error) {
if env.GetGitDirEnv() != "" {
return env.GetGitDirEnv(), nil
}
f, err := stat(".git")
if err != nil {
return "", err
}
if f.IsDir() {
return ".git", nil
}
fileBytes, err := readFile(".git")
if err != nil {
return "", err
}
fileContent := string(fileBytes)
if !strings.HasPrefix(fileContent, "gitdir: ") {
return "", errors.New(".git is a file which suggests we are in a submodule but the file's contents do not contain a gitdir pointing to the actual .git directory")
}
return strings.TrimSpace(strings.TrimPrefix(fileContent, "gitdir: ")), nil
}
func VerifyInGitRepo(osCommand *oscommands.OSCommand) error {
return osCommand.RunCommand("git rev-parse --git-dir")
}
func (c *GitCommand) RunCommand(formatString string, formatArgs ...interface{}) error {
_, err := c.RunCommandWithOutput(formatString, formatArgs...)
return err
}
func (c *GitCommand) RunCommandWithOutput(formatString string, formatArgs ...interface{}) (string, error) {
// TODO: have this retry logic in other places we run the command
waitTime := 50 * time.Millisecond
retryCount := 5
attempt := 0
for {
output, err := c.OSCommand.RunCommandWithOutput(formatString, formatArgs...)
if err != nil {
// if we have an error based on the index lock, we should wait a bit and then retry
if strings.Contains(output, ".git/index.lock") {
c.Log.Error(output)
c.Log.Info("index.lock prevented command from running. Retrying command after a small wait")
attempt++
time.Sleep(waitTime)
if attempt < retryCount {
continue
}
}
}
return output, err
}
}
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