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git.go
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// Package git contains various commands that shell out to git
// NOTE: Subject to change, do not rely on this package from outside git-lfs source
package git
import (
"bufio"
"bytes"
"errors"
"fmt"
"io/ioutil"
"net/url"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"sync"
"time"
"github.com/github/git-lfs/subprocess"
"github.com/rubyist/tracerx"
)
type RefType int
const (
RefTypeLocalBranch = RefType(iota)
RefTypeRemoteBranch = RefType(iota)
RefTypeLocalTag = RefType(iota)
RefTypeRemoteTag = RefType(iota)
RefTypeHEAD = RefType(iota) // current checkout
RefTypeOther = RefType(iota) // stash or unknown
// A ref which can be used as a placeholder for before the first commit
// Equivalent to git mktree < /dev/null, useful for diffing before first commit
RefBeforeFirstCommit = "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
)
// A git reference (branch, tag etc)
type Ref struct {
Name string
Type RefType
Sha string
}
// Some top level information about a commit (only first line of message)
type CommitSummary struct {
Sha string
ShortSha string
Parents []string
CommitDate time.Time
AuthorDate time.Time
AuthorName string
AuthorEmail string
CommitterName string
CommitterEmail string
Subject string
}
func LsRemote(remote, remoteRef string) (string, error) {
if remote == "" {
return "", errors.New("remote required")
}
if remoteRef == "" {
return subprocess.SimpleExec("git", "ls-remote", remote)
}
return subprocess.SimpleExec("git", "ls-remote", remote, remoteRef)
}
func ResolveRef(ref string) (*Ref, error) {
outp, err := subprocess.SimpleExec("git", "rev-parse", ref, "--symbolic-full-name", ref)
if err != nil {
return nil, fmt.Errorf("Git can't resolve ref: %q", ref)
}
if outp == "" {
return nil, fmt.Errorf("Git can't resolve ref: %q", ref)
}
lines := strings.Split(outp, "\n")
fullref := &Ref{Sha: lines[0]}
if len(lines) == 1 {
// ref is a sha1 and has no symbolic-full-name
fullref.Name = lines[0] // fullref.Sha
fullref.Type = RefTypeOther
return fullref, nil
}
// parse the symbolic-full-name
fullref.Type, fullref.Name = ParseRefToTypeAndName(lines[1])
return fullref, nil
}
func ResolveRefs(refnames []string) ([]*Ref, error) {
refs := make([]*Ref, len(refnames))
for i, name := range refnames {
ref, err := ResolveRef(name)
if err != nil {
return refs, err
}
refs[i] = ref
}
return refs, nil
}
func CurrentRef() (*Ref, error) {
return ResolveRef("HEAD")
}
func CurrentRemoteRef() (*Ref, error) {
remoteref, err := RemoteRefNameForCurrentBranch()
if err != nil {
return nil, err
}
return ResolveRef(remoteref)
}
// RemoteForCurrentBranch returns the name of the remote that the current branch is tracking
func RemoteForCurrentBranch() (string, error) {
ref, err := CurrentRef()
if err != nil {
return "", err
}
remote := RemoteForBranch(ref.Name)
if remote == "" {
return "", fmt.Errorf("remote not found for branch %q", ref.Name)
}
return remote, nil
}
// RemoteRefForCurrentBranch returns the full remote ref (refs/remotes/{remote}/{remotebranch})
// that the current branch is tracking.
func RemoteRefNameForCurrentBranch() (string, error) {
ref, err := CurrentRef()
if err != nil {
return "", err
}
if ref.Type == RefTypeHEAD || ref.Type == RefTypeOther {
return "", errors.New("not on a branch")
}
remote := RemoteForBranch(ref.Name)
if remote == "" {
return "", fmt.Errorf("remote not found for branch %q", ref.Name)
}
remotebranch := RemoteBranchForLocalBranch(ref.Name)
return fmt.Sprintf("refs/remotes/%s/%s", remote, remotebranch), nil
}
// RemoteForBranch returns the remote name that a given local branch is tracking (blank if none)
func RemoteForBranch(localBranch string) string {
return Config.Find(fmt.Sprintf("branch.%s.remote", localBranch))
}
// RemoteBranchForLocalBranch returns the name (only) of the remote branch that the local branch is tracking
// If no specific branch is configured, returns local branch name
func RemoteBranchForLocalBranch(localBranch string) string {
// get remote ref to track, may not be same name
merge := Config.Find(fmt.Sprintf("branch.%s.merge", localBranch))
if strings.HasPrefix(merge, "refs/heads/") {
return merge[11:]
} else {
return localBranch
}
}
func RemoteList() ([]string, error) {
cmd := subprocess.ExecCommand("git", "remote")
outp, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("Failed to call git remote: %v", err)
}
cmd.Start()
defer cmd.Wait()
scanner := bufio.NewScanner(outp)
var ret []string
for scanner.Scan() {
ret = append(ret, strings.TrimSpace(scanner.Text()))
}
return ret, nil
}
// Refs returns all of the local and remote branches and tags for the current
// repository. Other refs (HEAD, refs/stash, git notes) are ignored.
func LocalRefs() ([]*Ref, error) {
cmd := subprocess.ExecCommand("git", "show-ref", "--heads", "--tags")
outp, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("Failed to call git show-ref: %v", err)
}
var refs []*Ref
if err := cmd.Start(); err != nil {
return refs, err
}
scanner := bufio.NewScanner(outp)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
parts := strings.SplitN(line, " ", 2)
if len(parts) != 2 || len(parts[0]) != 40 || len(parts[1]) < 1 {
tracerx.Printf("Invalid line from git show-ref: %q", line)
continue
}
rtype, name := ParseRefToTypeAndName(parts[1])
if rtype != RefTypeLocalBranch && rtype != RefTypeLocalTag {
continue
}
refs = append(refs, &Ref{name, rtype, parts[0]})
}
return refs, cmd.Wait()
}
// ValidateRemote checks that a named remote is valid for use
// Mainly to check user-supplied remotes & fail more nicely
func ValidateRemote(remote string) error {
remotes, err := RemoteList()
if err != nil {
return err
}
for _, r := range remotes {
if r == remote {
return nil
}
}
if err = ValidateRemoteURL(remote); err == nil {
return nil
}
return fmt.Errorf("Invalid remote name: %q", remote)
}
// ValidateRemoteURL checks that a string is a valid Git remote URL
func ValidateRemoteURL(remote string) error {
u, err := url.Parse(remote)
if err != nil {
return err
}
switch u.Scheme {
case "ssh", "http", "https", "git":
return nil
case "":
// This is either an invalid remote name (maybe the user made a typo
// when selecting a named remote) or a bare SSH URL like
// "x@y.com:path/to/resource.git". Guess that this is a URL in the latter
// form if the string contains a colon ":", and an invalid remote if it
// does not.
if strings.Contains(remote, ":") {
return nil
}
return fmt.Errorf("Invalid remote name: %q", remote)
default:
return fmt.Errorf("Invalid remote url protocol %q in %q", u.Scheme, remote)
}
}
// DefaultRemote returns the default remote based on:
// 1. The currently tracked remote branch, if present
// 2. "origin", if defined
// 3. Any other SINGLE remote defined in .git/config
// Returns an error if all of these fail, i.e. no tracked remote branch, no
// "origin", and either no remotes defined or 2+ non-"origin" remotes
func DefaultRemote() (string, error) {
tracked, err := RemoteForCurrentBranch()
if err == nil {
return tracked, nil
}
// Otherwise, check what remotes are defined
remotes, err := RemoteList()
if err != nil {
return "", err
}
switch len(remotes) {
case 0:
return "", errors.New("No remotes defined")
case 1: // always use a single remote whether it's origin or otherwise
return remotes[0], nil
default:
for _, remote := range remotes {
// Use origin if present
if remote == "origin" {
return remote, nil
}
}
}
return "", errors.New("Unable to pick default remote, too ambiguous")
}
func UpdateIndex(file string) error {
_, err := subprocess.SimpleExec("git", "update-index", "-q", "--refresh", file)
return err
}
type gitConfig struct {
gitVersion string
mu sync.Mutex
}
var Config = &gitConfig{}
// Find returns the git config value for the key
func (c *gitConfig) Find(val string) string {
output, _ := subprocess.SimpleExec("git", "config", val)
return output
}
// FindGlobal returns the git config value global scope for the key
func (c *gitConfig) FindGlobal(val string) string {
output, _ := subprocess.SimpleExec("git", "config", "--global", val)
return output
}
// FindSystem returns the git config value in system scope for the key
func (c *gitConfig) FindSystem(val string) string {
output, _ := subprocess.SimpleExec("git", "config", "--system", val)
return output
}
// Find returns the git config value for the key
func (c *gitConfig) FindLocal(val string) string {
output, _ := subprocess.SimpleExec("git", "config", "--local", val)
return output
}
// SetGlobal sets the git config value for the key in the global config
func (c *gitConfig) SetGlobal(key, val string) (string, error) {
return subprocess.SimpleExec("git", "config", "--global", key, val)
}
// SetSystem sets the git config value for the key in the system config
func (c *gitConfig) SetSystem(key, val string) (string, error) {
return subprocess.SimpleExec("git", "config", "--system", key, val)
}
// UnsetGlobal removes the git config value for the key from the global config
func (c *gitConfig) UnsetGlobal(key string) (string, error) {
return subprocess.SimpleExec("git", "config", "--global", "--unset", key)
}
// UnsetSystem removes the git config value for the key from the system config
func (c *gitConfig) UnsetSystem(key string) (string, error) {
return subprocess.SimpleExec("git", "config", "--system", "--unset", key)
}
// UnsetGlobalSection removes the entire named section from the global config
func (c *gitConfig) UnsetGlobalSection(key string) (string, error) {
return subprocess.SimpleExec("git", "config", "--global", "--remove-section", key)
}
// UnsetGlobalSection removes the entire named section from the system config
func (c *gitConfig) UnsetSystemSection(key string) (string, error) {
return subprocess.SimpleExec("git", "config", "--system", "--remove-section", key)
}
// SetLocal sets the git config value for the key in the specified config file
func (c *gitConfig) SetLocal(file, key, val string) (string, error) {
args := make([]string, 1, 5)
args[0] = "config"
if len(file) > 0 {
args = append(args, "--file", file)
}
args = append(args, key, val)
return subprocess.SimpleExec("git", args...)
}
// UnsetLocalKey removes the git config value for the key from the specified config file
func (c *gitConfig) UnsetLocalKey(file, key string) (string, error) {
args := make([]string, 1, 5)
args[0] = "config"
if len(file) > 0 {
args = append(args, "--file", file)
}
args = append(args, "--unset", key)
return subprocess.SimpleExec("git", args...)
}
// List lists all of the git config values
func (c *gitConfig) List() (string, error) {
return subprocess.SimpleExec("git", "config", "-l")
}
// ListFromFile lists all of the git config values in the given config file
func (c *gitConfig) ListFromFile(f string) (string, error) {
return subprocess.SimpleExec("git", "config", "-l", "-f", f)
}
// Version returns the git version
func (c *gitConfig) Version() (string, error) {
c.mu.Lock()
defer c.mu.Unlock()
if len(c.gitVersion) == 0 {
v, err := subprocess.SimpleExec("git", "version")
if err != nil {
return v, err
}
c.gitVersion = v
}
return c.gitVersion, nil
}
// IsVersionAtLeast returns whether the git version is the one specified or higher
// argument is plain version string separated by '.' e.g. "2.3.1" but can omit minor/patch
func (c *gitConfig) IsGitVersionAtLeast(ver string) bool {
gitver, err := c.Version()
if err != nil {
tracerx.Printf("Error getting git version: %v", err)
return false
}
return IsVersionAtLeast(gitver, ver)
}
// RecentBranches returns branches with commit dates on or after the given date/time
// Return full Ref type for easier detection of duplicate SHAs etc
// since: refs with commits on or after this date will be included
// includeRemoteBranches: true to include refs on remote branches
// onlyRemote: set to non-blank to only include remote branches on a single remote
func RecentBranches(since time.Time, includeRemoteBranches bool, onlyRemote string) ([]*Ref, error) {
cmd := subprocess.ExecCommand("git", "for-each-ref",
`--sort=-committerdate`,
`--format=%(refname) %(objectname) %(committerdate:iso)`,
"refs")
outp, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("Failed to call git for-each-ref: %v", err)
}
cmd.Start()
defer cmd.Wait()
scanner := bufio.NewScanner(outp)
// Output is like this:
// refs/heads/master f03686b324b29ff480591745dbfbbfa5e5ac1bd5 2015-08-19 16:50:37 +0100
// refs/remotes/origin/master ad3b29b773e46ad6870fdf08796c33d97190fe93 2015-08-13 16:50:37 +0100
// Output is ordered by latest commit date first, so we can stop at the threshold
regex := regexp.MustCompile(`^(refs/[^/]+/\S+)\s+([0-9A-Za-z]{40})\s+(\d{4}-\d{2}-\d{2}\s+\d{2}\:\d{2}\:\d{2}\s+[\+\-]\d{4})`)
tracerx.Printf("RECENT: Getting refs >= %v", since)
var ret []*Ref
for scanner.Scan() {
line := scanner.Text()
if match := regex.FindStringSubmatch(line); match != nil {
fullref := match[1]
sha := match[2]
reftype, ref := ParseRefToTypeAndName(fullref)
if reftype == RefTypeRemoteBranch || reftype == RefTypeRemoteTag {
if !includeRemoteBranches {
continue
}
if onlyRemote != "" && !strings.HasPrefix(ref, onlyRemote+"/") {
continue
}
}
// This is a ref we might use
// Check the date
commitDate, err := ParseGitDate(match[3])
if err != nil {
return ret, err
}
if commitDate.Before(since) {
// the end
break
}
tracerx.Printf("RECENT: %v (%v)", ref, commitDate)
ret = append(ret, &Ref{ref, reftype, sha})
}
}
return ret, nil
}
// Get the type & name of a git reference
func ParseRefToTypeAndName(fullref string) (t RefType, name string) {
const localPrefix = "refs/heads/"
const remotePrefix = "refs/remotes/"
const remoteTagPrefix = "refs/remotes/tags/"
const localTagPrefix = "refs/tags/"
if fullref == "HEAD" {
name = fullref
t = RefTypeHEAD
} else if strings.HasPrefix(fullref, localPrefix) {
name = fullref[len(localPrefix):]
t = RefTypeLocalBranch
} else if strings.HasPrefix(fullref, remotePrefix) {
name = fullref[len(remotePrefix):]
t = RefTypeRemoteBranch
} else if strings.HasPrefix(fullref, remoteTagPrefix) {
name = fullref[len(remoteTagPrefix):]
t = RefTypeRemoteTag
} else if strings.HasPrefix(fullref, localTagPrefix) {
name = fullref[len(localTagPrefix):]
t = RefTypeLocalTag
} else {
name = fullref
t = RefTypeOther
}
return
}
// Parse a Git date formatted in ISO 8601 format (%ci/%ai)
func ParseGitDate(str string) (time.Time, error) {
// Unfortunately Go and Git don't overlap in their builtin date formats
// Go's time.RFC1123Z and Git's %cD are ALMOST the same, except that
// when the day is < 10 Git outputs a single digit, but Go expects a leading
// zero - this is enough to break the parsing. Sigh.
// Format is for 2 Jan 2006, 15:04:05 -7 UTC as per Go
return time.Parse("2006-01-02 15:04:05 -0700", str)
}
// FormatGitDate converts a Go date into a git command line format date
func FormatGitDate(tm time.Time) string {
// Git format is "Fri Jun 21 20:26:41 2013 +0900" but no zero-leading for day
return tm.Format("Mon Jan 2 15:04:05 2006 -0700")
}
// Get summary information about a commit
func GetCommitSummary(commit string) (*CommitSummary, error) {
cmd := subprocess.ExecCommand("git", "show", "-s",
`--format=%H|%h|%P|%ai|%ci|%ae|%an|%ce|%cn|%s`, commit)
out, err := cmd.CombinedOutput()
if err != nil {
return nil, fmt.Errorf("Failed to call git show: %v %v", err, string(out))
}
// At most 10 substrings so subject line is not split on anything
fields := strings.SplitN(string(out), "|", 10)
// Cope with the case where subject is blank
if len(fields) >= 9 {
ret := &CommitSummary{}
// Get SHAs from output, not commit input, so we can support symbolic refs
ret.Sha = fields[0]
ret.ShortSha = fields[1]
ret.Parents = strings.Split(fields[2], " ")
// %aD & %cD (RFC2822) matches Go's RFC1123Z format
ret.AuthorDate, _ = ParseGitDate(fields[3])
ret.CommitDate, _ = ParseGitDate(fields[4])
ret.AuthorEmail = fields[5]
ret.AuthorName = fields[6]
ret.CommitterEmail = fields[7]
ret.CommitterName = fields[8]
if len(fields) > 9 {
ret.Subject = strings.TrimRight(fields[9], "\n")
}
return ret, nil
} else {
msg := fmt.Sprintf("Unexpected output from git show: %v", string(out))
return nil, errors.New(msg)
}
}
func GitAndRootDirs() (string, string, error) {
cmd := subprocess.ExecCommand("git", "rev-parse", "--git-dir", "--show-toplevel")
buf := &bytes.Buffer{}
cmd.Stderr = buf
out, err := cmd.Output()
output := string(out)
if err != nil {
return "", "", fmt.Errorf("Failed to call git rev-parse --git-dir --show-toplevel: %q", buf.String())
}
paths := strings.Split(output, "\n")
pathLen := len(paths)
if pathLen == 0 {
return "", "", fmt.Errorf("Bad git rev-parse output: %q", output)
}
absGitDir, err := filepath.Abs(paths[0])
if err != nil {
return "", "", fmt.Errorf("Error converting %q to absolute: %s", paths[0], err)
}
if pathLen == 1 || len(paths[1]) == 0 {
return absGitDir, "", nil
}
absRootDir := paths[1]
return absGitDir, absRootDir, nil
}
func RootDir() (string, error) {
cmd := subprocess.ExecCommand("git", "rev-parse", "--show-toplevel")
out, err := cmd.Output()
if err != nil {
return "", fmt.Errorf("Failed to call git rev-parse --show-toplevel: %v %v", err, string(out))
}
path := strings.TrimSpace(string(out))
if len(path) > 0 {
return filepath.Abs(path)
}
return "", nil
}
func GitDir() (string, error) {
cmd := subprocess.ExecCommand("git", "rev-parse", "--git-dir")
out, err := cmd.Output()
if err != nil {
return "", fmt.Errorf("Failed to call git rev-parse --git-dir: %v %v", err, string(out))
}
path := strings.TrimSpace(string(out))
if len(path) > 0 {
return filepath.Abs(path)
}
return "", nil
}
// GetAllWorkTreeHEADs returns the refs that all worktrees are using as HEADs
// This returns all worktrees plus the master working copy, and works even if
// working dir is actually in a worktree right now
// Pass in the git storage dir (parent of 'objects') to work from
func GetAllWorkTreeHEADs(storageDir string) ([]*Ref, error) {
worktreesdir := filepath.Join(storageDir, "worktrees")
dirf, err := os.Open(worktreesdir)
if err != nil && !os.IsNotExist(err) {
return nil, err
}
var worktrees []*Ref
if err == nil {
// There are some worktrees
defer dirf.Close()
direntries, err := dirf.Readdir(0)
if err != nil {
return nil, err
}
for _, dirfi := range direntries {
if dirfi.IsDir() {
// to avoid having to chdir and run git commands to identify the commit
// just read the HEAD file & git rev-parse if necessary
// Since the git repo is shared the same rev-parse will work from this location
headfile := filepath.Join(worktreesdir, dirfi.Name(), "HEAD")
ref, err := parseRefFile(headfile)
if err != nil {
tracerx.Printf("Error reading %v for worktree, skipping: %v", headfile, err)
continue
}
worktrees = append(worktrees, ref)
}
}
}
// This has only established the separate worktrees, not the original checkout
// If the storageDir contains a HEAD file then there is a main checkout
// as well; this mus tbe resolveable whether you're in the main checkout or
// a worktree
headfile := filepath.Join(storageDir, "HEAD")
ref, err := parseRefFile(headfile)
if err == nil {
worktrees = append(worktrees, ref)
} else if !os.IsNotExist(err) { // ok if not exists, probably bare repo
tracerx.Printf("Error reading %v for main checkout, skipping: %v", headfile, err)
}
return worktrees, nil
}
// Manually parse a reference file like HEAD and return the Ref it resolves to
func parseRefFile(filename string) (*Ref, error) {
bytes, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
contents := strings.TrimSpace(string(bytes))
if strings.HasPrefix(contents, "ref:") {
contents = strings.TrimSpace(contents[4:])
}
return ResolveRef(contents)
}
// IsVersionAtLeast compares 2 version strings (ok to be prefixed with 'git version', ignores)
func IsVersionAtLeast(actualVersion, desiredVersion string) bool {
// Capture 1-3 version digits, optionally prefixed with 'git version' and possibly
// with suffixes which we'll ignore (e.g. unstable builds, MinGW versions)
verregex := regexp.MustCompile(`(?:git version\s+)?(\d+)(?:.(\d+))?(?:.(\d+))?.*`)
var atleast uint64
// Support up to 1000 in major/minor/patch digits
const majorscale = 1000 * 1000
const minorscale = 1000
if match := verregex.FindStringSubmatch(desiredVersion); match != nil {
// Ignore errors as regex won't match anything other than digits
major, _ := strconv.Atoi(match[1])
atleast += uint64(major * majorscale)
if len(match) > 2 {
minor, _ := strconv.Atoi(match[2])
atleast += uint64(minor * minorscale)
}
if len(match) > 3 {
patch, _ := strconv.Atoi(match[3])
atleast += uint64(patch)
}
}
var actual uint64
if match := verregex.FindStringSubmatch(actualVersion); match != nil {
major, _ := strconv.Atoi(match[1])
actual += uint64(major * majorscale)
if len(match) > 2 {
minor, _ := strconv.Atoi(match[2])
actual += uint64(minor * minorscale)
}
if len(match) > 3 {
patch, _ := strconv.Atoi(match[3])
actual += uint64(patch)
}
}
return actual >= atleast
}
// For compatibility with git clone we must mirror all flags in CloneWithoutFilters
type CloneFlags struct {
// --template <template_directory>
TemplateDirectory string
// -l --local
Local bool
// -s --shared
Shared bool
// --no-hardlinks
NoHardlinks bool
// -q --quiet
Quiet bool
// -n --no-checkout
NoCheckout bool
// --progress
Progress bool
// --bare
Bare bool
// --mirror
Mirror bool
// -o <name> --origin <name>
Origin string
// -b <name> --branch <name>
Branch string
// -u <upload-pack> --upload-pack <pack>
Upload string
// --reference <repository>
Reference string
// --dissociate
Dissociate bool
// --separate-git-dir <git dir>
SeparateGit string
// --depth <depth>
Depth string
// --recursive
Recursive bool
// --recurse-submodules
RecurseSubmodules bool
// -c <value> --config <value>
Config string
// --single-branch
SingleBranch bool
// --no-single-branch
NoSingleBranch bool
// --verbose
Verbose bool
// --ipv4
Ipv4 bool
// --ipv6
Ipv6 bool
}
// CloneWithoutFilters clones a git repo but without the smudge filter enabled
// so that files in the working copy will be pointers and not real LFS data
func CloneWithoutFilters(flags CloneFlags, args []string) error {
// Before git 2.8, setting filters to blank causes lots of warnings, so use cat instead (slightly slower)
// Also pre 2.2 it failed completely. We used to use it anyway in git 2.2-2.7 and
// suppress the messages in stderr, but doing that with standard StderrPipe suppresses
// the git clone output (git thinks it's not a terminal) and makes it look like it's
// not working. You can get around that with https://github.com/kr/pty but that
// causes difficult issues with passing through Stdin for login prompts
// This way is simpler & more practical.
filterOverride := ""
if !Config.IsGitVersionAtLeast("2.8.0") {
filterOverride = "cat"
}
// Disable the LFS filters while cloning to speed things up
// this is especially effective on Windows where even calling git-lfs at all
// with --skip-smudge is costly across many files in a checkout
cmdargs := []string{
"-c", fmt.Sprintf("filter.lfs.smudge=%v", filterOverride),
"-c", "filter.lfs.required=false",
"clone"}
// flags
if flags.Bare {
cmdargs = append(cmdargs, "--bare")
}
if len(flags.Branch) > 0 {
cmdargs = append(cmdargs, "--branch", flags.Branch)
}
if len(flags.Config) > 0 {
cmdargs = append(cmdargs, "--config", flags.Config)
}
if len(flags.Depth) > 0 {
cmdargs = append(cmdargs, "--depth", flags.Depth)
}
if flags.Dissociate {
cmdargs = append(cmdargs, "--dissociate")
}
if flags.Ipv4 {
cmdargs = append(cmdargs, "--ipv4")
}
if flags.Ipv6 {
cmdargs = append(cmdargs, "--ipv6")
}
if flags.Local {
cmdargs = append(cmdargs, "--local")
}
if flags.Mirror {
cmdargs = append(cmdargs, "--mirror")
}
if flags.NoCheckout {
cmdargs = append(cmdargs, "--no-checkout")
}
if flags.NoHardlinks {
cmdargs = append(cmdargs, "--no-hardlinks")
}
if flags.NoSingleBranch {
cmdargs = append(cmdargs, "--no-single-branch")
}
if len(flags.Origin) > 0 {
cmdargs = append(cmdargs, "--origin", flags.Origin)
}
if flags.Progress {
cmdargs = append(cmdargs, "--progress")
}
if flags.Quiet {
cmdargs = append(cmdargs, "--quiet")
}
if flags.Recursive {
cmdargs = append(cmdargs, "--recursive")
}
if flags.RecurseSubmodules {
cmdargs = append(cmdargs, "--recurse-submodules")
}
if len(flags.Reference) > 0 {
cmdargs = append(cmdargs, "--reference", flags.Reference)
}
if len(flags.SeparateGit) > 0 {
cmdargs = append(cmdargs, "--separate-git-dir", flags.SeparateGit)
}
if flags.Shared {
cmdargs = append(cmdargs, "--shared")
}
if flags.SingleBranch {
cmdargs = append(cmdargs, "--single-branch")
}
if len(flags.TemplateDirectory) > 0 {
cmdargs = append(cmdargs, "--template", flags.TemplateDirectory)
}
if len(flags.Upload) > 0 {
cmdargs = append(cmdargs, "--upload-pack", flags.Upload)
}
if flags.Verbose {
cmdargs = append(cmdargs, "--verbose")
}
// Now args
cmdargs = append(cmdargs, args...)
cmd := subprocess.ExecCommand("git", cmdargs...)
// Assign all streams direct
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
err := cmd.Start()
if err != nil {
return fmt.Errorf("Failed to start git clone: %v", err)
}
err = cmd.Wait()
if err != nil {
return fmt.Errorf("git clone failed: %v", err)
}
return nil
}
// CachedRemoteRefs returns the list of branches & tags for a remote which are
// currently cached locally. No remote request is made to verify them.
func CachedRemoteRefs(remoteName string) ([]*Ref, error) {
var ret []*Ref
cmd := subprocess.ExecCommand("git", "show-ref")
outp, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("Failed to call git show-ref: %v", err)
}
cmd.Start()
scanner := bufio.NewScanner(outp)
r := regexp.MustCompile(fmt.Sprintf(`([0-9a-fA-F]{40})\s+refs/remotes/%v/(.*)`, remoteName))
for scanner.Scan() {
if match := r.FindStringSubmatch(scanner.Text()); match != nil {
name := strings.TrimSpace(match[2])
// Don't match head
if name == "HEAD" {
continue
}
sha := match[1]
ret = append(ret, &Ref{name, RefTypeRemoteBranch, sha})
}
}
return ret, nil
}
// RemoteRefs returns a list of branches & tags for a remote by actually
// accessing the remote vir git ls-remote
func RemoteRefs(remoteName string) ([]*Ref, error) {
var ret []*Ref
cmd := subprocess.ExecCommand("git", "ls-remote", "--heads", "--tags", "-q", remoteName)
outp, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("Failed to call git ls-remote: %v", err)
}
cmd.Start()
scanner := bufio.NewScanner(outp)
r := regexp.MustCompile(`([0-9a-fA-F]{40})\s+refs/(heads|tags)/(.*)`)
for scanner.Scan() {
if match := r.FindStringSubmatch(scanner.Text()); match != nil {
name := strings.TrimSpace(match[3])
// Don't match head
if name == "HEAD" {
continue
}
sha := match[1]
if match[2] == "heads" {
ret = append(ret, &Ref{name, RefTypeRemoteBranch, sha})
} else {
ret = append(ret, &Ref{name, RefTypeRemoteTag, sha})
}
}
}
return ret, nil
}
// GetTrackedFiles returns a list of files which are tracked in Git which match
// the pattern specified (standard wildcard form)
// Both pattern and the results are relative to the current working directory, not
// the root of the repository
func GetTrackedFiles(pattern string) ([]string, error) {
safePattern := sanitizePattern(pattern)
sanitized := len(safePattern) < len(pattern)
var ret []string
cmd := subprocess.ExecCommand("git",
"-c", "core.quotepath=false", // handle special chars in filenames
"ls-files",
"--cached", // include things which are staged but not committed right now
"--", // no ambiguous patterns
safePattern)
outp, err := cmd.StdoutPipe()
if err != nil {
return nil, fmt.Errorf("Failed to call git ls-files: %v", err)
}
cmd.Start()
scanner := bufio.NewScanner(outp)
for scanner.Scan() {
line := scanner.Text()
// If the given pattern was sanitized, then skip all files which