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@unknwon @zeripath @lunny @tamalsaha @saitho @kolaente @filipnavara
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// 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 (
"bytes"
"container/list"
"errors"
"fmt"
"os"
"path"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/unknwon/com"
"gopkg.in/src-d/go-billy.v4/osfs"
gogit "gopkg.in/src-d/go-git.v4"
"gopkg.in/src-d/go-git.v4/plumbing/cache"
"gopkg.in/src-d/go-git.v4/storage/filesystem"
)
// Repository represents a Git repository.
type Repository struct {
Path string
tagCache *ObjectCache
gogitRepo *gogit.Repository
gogitStorage *filesystem.Storage
gpgSettings *GPGSettings
}
// GPGSettings represents the default GPG settings for this repository
type GPGSettings struct {
Sign bool
KeyID string
Email string
Name string
PublicKeyContent string
}
const prettyLogFormat = `--pretty=format:%H`
func (repo *Repository) parsePrettyFormatLogToList(logs []byte) (*list.List, error) {
l := list.New()
if len(logs) == 0 {
return l, nil
}
parts := bytes.Split(logs, []byte{'\n'})
for _, commitID := range parts {
commit, err := repo.GetCommit(string(commitID))
if err != nil {
return nil, err
}
l.PushBack(commit)
}
return l, nil
}
// IsRepoURLAccessible checks if given repository URL is accessible.
func IsRepoURLAccessible(url string) bool {
_, err := NewCommand("ls-remote", "-q", "-h", url, "HEAD").Run()
return err == nil
}
// InitRepository initializes a new Git repository.
func InitRepository(repoPath string, bare bool) error {
err := os.MkdirAll(repoPath, os.ModePerm)
if err != nil {
return err
}
cmd := NewCommand("init")
if bare {
cmd.AddArguments("--bare")
}
_, err = cmd.RunInDir(repoPath)
return err
}
// OpenRepository opens the repository at the given path.
func OpenRepository(repoPath string) (*Repository, error) {
repoPath, err := filepath.Abs(repoPath)
if err != nil {
return nil, err
} else if !isDir(repoPath) {
return nil, errors.New("no such file or directory")
}
fs := osfs.New(repoPath)
_, err = fs.Stat(".git")
if err == nil {
fs, err = fs.Chroot(".git")
if err != nil {
return nil, err
}
}
storage := filesystem.NewStorageWithOptions(fs, cache.NewObjectLRUDefault(), filesystem.Options{KeepDescriptors: true})
gogitRepo, err := gogit.Open(storage, fs)
if err != nil {
return nil, err
}
return &Repository{
Path: repoPath,
gogitRepo: gogitRepo,
gogitStorage: storage,
tagCache: newObjectCache(),
}, nil
}
// IsEmpty Check if repository is empty.
func (repo *Repository) IsEmpty() (bool, error) {
var errbuf strings.Builder
if err := NewCommand("log", "-1").RunInDirPipeline(repo.Path, nil, &errbuf); err != nil {
if strings.Contains(errbuf.String(), "fatal: bad default revision 'HEAD'") ||
strings.Contains(errbuf.String(), "fatal: your current branch 'master' does not have any commits yet") {
return true, nil
}
return true, fmt.Errorf("check empty: %v - %s", err, errbuf.String())
}
return false, nil
}
// CloneRepoOptions options when clone a repository
type CloneRepoOptions struct {
Timeout time.Duration
Mirror bool
Bare bool
Quiet bool
Branch string
Shared bool
NoCheckout bool
}
// Clone clones original repository to target path.
func Clone(from, to string, opts CloneRepoOptions) (err error) {
toDir := path.Dir(to)
if err = os.MkdirAll(toDir, os.ModePerm); err != nil {
return err
}
cmd := NewCommand("clone")
if opts.Mirror {
cmd.AddArguments("--mirror")
}
if opts.Bare {
cmd.AddArguments("--bare")
}
if opts.Quiet {
cmd.AddArguments("--quiet")
}
if opts.Shared {
cmd.AddArguments("-s")
}
if opts.NoCheckout {
cmd.AddArguments("--no-checkout")
}
if len(opts.Branch) > 0 {
cmd.AddArguments("-b", opts.Branch)
}
cmd.AddArguments("--", from, to)
if opts.Timeout <= 0 {
opts.Timeout = -1
}
_, err = cmd.RunTimeout(opts.Timeout)
return err
}
// PullRemoteOptions options when pull from remote
type PullRemoteOptions struct {
Timeout time.Duration
All bool
Rebase bool
Remote string
Branch string
}
// Pull pulls changes from remotes.
func Pull(repoPath string, opts PullRemoteOptions) error {
cmd := NewCommand("pull")
if opts.Rebase {
cmd.AddArguments("--rebase")
}
if opts.All {
cmd.AddArguments("--all")
} else {
cmd.AddArguments("--", opts.Remote, opts.Branch)
}
if opts.Timeout <= 0 {
opts.Timeout = -1
}
_, err := cmd.RunInDirTimeout(opts.Timeout, repoPath)
return err
}
// PushOptions options when push to remote
type PushOptions struct {
Remote string
Branch string
Force bool
Env []string
}
// Push pushs local commits to given remote branch.
func Push(repoPath string, opts PushOptions) error {
cmd := NewCommand("push")
if opts.Force {
cmd.AddArguments("-f")
}
cmd.AddArguments("--", opts.Remote, opts.Branch)
_, err := cmd.RunInDirWithEnv(repoPath, opts.Env)
return err
}
// CheckoutOptions options when heck out some branch
type CheckoutOptions struct {
Timeout time.Duration
Branch string
OldBranch string
}
// Checkout checkouts a branch
func Checkout(repoPath string, opts CheckoutOptions) error {
cmd := NewCommand("checkout")
if len(opts.OldBranch) > 0 {
cmd.AddArguments("-b")
}
if opts.Timeout <= 0 {
opts.Timeout = -1
}
cmd.AddArguments(opts.Branch)
if len(opts.OldBranch) > 0 {
cmd.AddArguments(opts.OldBranch)
}
_, err := cmd.RunInDirTimeout(opts.Timeout, repoPath)
return err
}
// ResetHEAD resets HEAD to given revision or head of branch.
func ResetHEAD(repoPath string, hard bool, revision string) error {
cmd := NewCommand("reset")
if hard {
cmd.AddArguments("--hard")
}
_, err := cmd.AddArguments(revision).RunInDir(repoPath)
return err
}
// MoveFile moves a file to another file or directory.
func MoveFile(repoPath, oldTreeName, newTreeName string) error {
_, err := NewCommand("mv").AddArguments(oldTreeName, newTreeName).RunInDir(repoPath)
return err
}
// CountObject represents repository count objects report
type CountObject struct {
Count int64
Size int64
InPack int64
Packs int64
SizePack int64
PrunePack int64
Garbage int64
SizeGarbage int64
}
const (
statCount = "count: "
statSize = "size: "
statInpack = "in-pack: "
statPacks = "packs: "
statSizePack = "size-pack: "
statPrunePackage = "prune-package: "
statGarbage = "garbage: "
statSizeGarbage = "size-garbage: "
)
// GetRepoSize returns disk consumption for repo in path
func GetRepoSize(repoPath string) (*CountObject, error) {
cmd := NewCommand("count-objects", "-v")
stdout, err := cmd.RunInDir(repoPath)
if err != nil {
return nil, err
}
return parseSize(stdout), nil
}
// parseSize parses the output from count-objects and return a CountObject
func parseSize(objects string) *CountObject {
repoSize := new(CountObject)
for _, line := range strings.Split(objects, "\n") {
switch {
case strings.HasPrefix(line, statCount):
repoSize.Count = com.StrTo(line[7:]).MustInt64()
case strings.HasPrefix(line, statSize):
repoSize.Size = com.StrTo(line[6:]).MustInt64() * 1024
case strings.HasPrefix(line, statInpack):
repoSize.InPack = com.StrTo(line[9:]).MustInt64()
case strings.HasPrefix(line, statPacks):
repoSize.Packs = com.StrTo(line[7:]).MustInt64()
case strings.HasPrefix(line, statSizePack):
repoSize.SizePack = com.StrTo(line[11:]).MustInt64() * 1024
case strings.HasPrefix(line, statPrunePackage):
repoSize.PrunePack = com.StrTo(line[16:]).MustInt64()
case strings.HasPrefix(line, statGarbage):
repoSize.Garbage = com.StrTo(line[9:]).MustInt64()
case strings.HasPrefix(line, statSizeGarbage):
repoSize.SizeGarbage = com.StrTo(line[14:]).MustInt64() * 1024
}
}
return repoSize
}
// GetLatestCommitTime returns time for latest commit in repository (across all branches)
func GetLatestCommitTime(repoPath string) (time.Time, error) {
cmd := NewCommand("for-each-ref", "--sort=-committerdate", "refs/heads/", "--count", "1", "--format=%(committerdate)")
stdout, err := cmd.RunInDir(repoPath)
if err != nil {
return time.Time{}, err
}
commitTime := strings.TrimSpace(stdout)
return time.Parse(GitTimeLayout, commitTime)
}
// DivergeObject represents commit count diverging commits
type DivergeObject struct {
Ahead int
Behind int
}
func checkDivergence(repoPath string, baseBranch string, targetBranch string) (int, error) {
branches := fmt.Sprintf("%s..%s", baseBranch, targetBranch)
cmd := NewCommand("rev-list", "--count", branches)
stdout, err := cmd.RunInDir(repoPath)
if err != nil {
return -1, err
}
outInteger, errInteger := strconv.Atoi(strings.Trim(stdout, "\n"))
if errInteger != nil {
return -1, errInteger
}
return outInteger, nil
}
// GetDivergingCommits returns the number of commits a targetBranch is ahead or behind a baseBranch
func GetDivergingCommits(repoPath string, baseBranch string, targetBranch string) (DivergeObject, error) {
// $(git rev-list --count master..feature) commits ahead of master
ahead, errorAhead := checkDivergence(repoPath, baseBranch, targetBranch)
if errorAhead != nil {
return DivergeObject{}, errorAhead
}
// $(git rev-list --count feature..master) commits behind master
behind, errorBehind := checkDivergence(repoPath, targetBranch, baseBranch)
if errorBehind != nil {
return DivergeObject{}, errorBehind
}
return DivergeObject{ahead, behind}, nil
}
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