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package vcs
import (
"fmt"
"net/url"
"os"
"os/exec"
"path/filepath"
"regexp"
"strings"
"time"
)
var bzrDetectURL = regexp.MustCompile("parent branch: (?P<foo>.+)\n")
// NewBzrRepo creates a new instance of BzrRepo. The remote and local directories
// need to be passed in.
func NewBzrRepo(remote, local string) (*BzrRepo, error) {
ins := depInstalled("bzr")
if !ins {
return nil, NewLocalError("bzr is not installed", nil, "")
}
ltype, err := DetectVcsFromFS(local)
// Found a VCS other than Bzr. Need to report an error.
if err == nil && ltype != Bzr {
return nil, ErrWrongVCS
}
r := &BzrRepo{}
r.setRemote(remote)
r.setLocalPath(local)
r.Logger = Logger
// With the other VCS we can check if the endpoint locally is different
// from the one configured internally. But, with Bzr you can't. For example,
// if you do `bzr branch https://launchpad.net/govcstestbzrrepo` and then
// use `bzr info` to get the parent branch you'll find it set to
// http://bazaar.launchpad.net/~mattfarina/govcstestbzrrepo/trunk/. Notice
// the change from https to http and the path chance.
// Here we set the remote to be the local one if none is passed in.
if err == nil && r.CheckLocal() && remote == "" {
c := exec.Command("bzr", "info")
c.Dir = local
c.Env = envForDir(c.Dir)
out, err := c.CombinedOutput()
if err != nil {
return nil, NewLocalError("Unable to retrieve local repo information", err, string(out))
}
m := bzrDetectURL.FindStringSubmatch(string(out))
// If no remote was passed in but one is configured for the locally
// checked out Bzr repo use that one.
if m[1] != "" {
r.setRemote(m[1])
}
}
return r, nil
}
// BzrRepo implements the Repo interface for the Bzr source control.
type BzrRepo struct {
base
}
// Vcs retrieves the underlying VCS being implemented.
func (s BzrRepo) Vcs() Type {
return Bzr
}
// Get is used to perform an initial clone of a repository.
func (s *BzrRepo) Get() error {
basePath := filepath.Dir(filepath.FromSlash(s.LocalPath()))
if _, err := os.Stat(basePath); os.IsNotExist(err) {
err = os.MkdirAll(basePath, 0755)
if err != nil {
return NewLocalError("Unable to create directory", err, "")
}
}
out, err := s.run("bzr", "branch", s.Remote(), s.LocalPath())
if err != nil {
return NewRemoteError("Unable to get repository", err, string(out))
}
return nil
}
// Init initializes a bazaar repository at local location.
func (s *BzrRepo) Init() error {
out, err := s.run("bzr", "init", s.LocalPath())
// There are some windows cases where bazaar cannot create the parent
// directory if it does not already exist, to the location it's trying
// to create the repo. Catch that error and try to handle it.
if err != nil && s.isUnableToCreateDir(err) {
basePath := filepath.Dir(filepath.FromSlash(s.LocalPath()))
if _, err := os.Stat(basePath); os.IsNotExist(err) {
err = os.MkdirAll(basePath, 0755)
if err != nil {
return NewLocalError("Unable to initialize repository", err, "")
}
out, err = s.run("bzr", "init", s.LocalPath())
if err != nil {
return NewLocalError("Unable to initialize repository", err, string(out))
}
return nil
}
} else if err != nil {
return NewLocalError("Unable to initialize repository", err, string(out))
}
return nil
}
// Update performs a Bzr pull and update to an existing checkout.
func (s *BzrRepo) Update() error {
out, err := s.RunFromDir("bzr", "pull")
if err != nil {
return NewRemoteError("Unable to update repository", err, string(out))
}
out, err = s.RunFromDir("bzr", "update")
if err != nil {
return NewRemoteError("Unable to update repository", err, string(out))
}
return nil
}
// UpdateVersion sets the version of a package currently checked out via Bzr.
func (s *BzrRepo) UpdateVersion(version string) error {
out, err := s.RunFromDir("bzr", "update", "-r", version)
if err != nil {
return NewLocalError("Unable to update checked out version", err, string(out))
}
return nil
}
// Version retrieves the current version.
func (s *BzrRepo) Version() (string, error) {
out, err := s.RunFromDir("bzr", "revno", "--tree")
if err != nil {
return "", NewLocalError("Unable to retrieve checked out version", err, string(out))
}
return strings.TrimSpace(string(out)), nil
}
// Current returns the current version-ish. This means:
// * -1 if on the tip of the branch (this is the Bzr value for HEAD)
// * A tag if on a tag
// * Otherwise a revision
func (s *BzrRepo) Current() (string, error) {
tip, err := s.CommitInfo("-1")
if err != nil {
return "", err
}
curr, err := s.Version()
if err != nil {
return "", err
}
if tip.Commit == curr {
return "-1", nil
}
ts, err := s.TagsFromCommit(curr)
if err != nil {
return "", err
}
if len(ts) > 0 {
return ts[0], nil
}
return curr, nil
}
// Date retrieves the date on the latest commit.
func (s *BzrRepo) Date() (time.Time, error) {
out, err := s.RunFromDir("bzr", "version-info", "--custom", "--template={date}")
if err != nil {
return time.Time{}, NewLocalError("Unable to retrieve revision date", err, string(out))
}
t, err := time.Parse(longForm, string(out))
if err != nil {
return time.Time{}, NewLocalError("Unable to retrieve revision date", err, string(out))
}
return t, nil
}
// CheckLocal verifies the local location is a Bzr repo.
func (s *BzrRepo) CheckLocal() bool {
if _, err := os.Stat(s.LocalPath() + "/.bzr"); err == nil {
return true
}
return false
}
// Branches returns a list of available branches on the repository.
// In Bazaar (Bzr) clones and branches are the same. A different branch will
// have a different URL location which we cannot detect from the repo. This
// is a little different from other VCS.
func (s *BzrRepo) Branches() ([]string, error) {
var branches []string
return branches, nil
}
// Tags returns a list of available tags on the repository.
func (s *BzrRepo) Tags() ([]string, error) {
out, err := s.RunFromDir("bzr", "tags")
if err != nil {
return []string{}, NewLocalError("Unable to retrieve tags", err, string(out))
}
tags := s.referenceList(string(out), `(?m-s)^(\S+)`)
return tags, nil
}
// IsReference returns if a string is a reference. A reference can be a
// commit id or tag.
func (s *BzrRepo) IsReference(r string) bool {
_, err := s.RunFromDir("bzr", "revno", "-r", r)
return err == nil
}
// IsDirty returns if the checkout has been modified from the checked
// out reference.
func (s *BzrRepo) IsDirty() bool {
out, err := s.RunFromDir("bzr", "diff")
return err != nil || len(out) != 0
}
// CommitInfo retrieves metadata about a commit.
func (s *BzrRepo) CommitInfo(id string) (*CommitInfo, error) {
r := "-r" + id
out, err := s.RunFromDir("bzr", "log", r, "--log-format=long")
if err != nil {
return nil, ErrRevisionUnavailable
}
ci := &CommitInfo{}
lines := strings.Split(string(out), "\n")
const format = "Mon 2006-01-02 15:04:05 -0700"
var track int
var trackOn bool
// Note, bzr does not appear to use i18m.
for i, l := range lines {
if strings.HasPrefix(l, "revno:") {
ci.Commit = strings.TrimSpace(strings.TrimPrefix(l, "revno:"))
} else if strings.HasPrefix(l, "committer:") {
ci.Author = strings.TrimSpace(strings.TrimPrefix(l, "committer:"))
} else if strings.HasPrefix(l, "timestamp:") {
ts := strings.TrimSpace(strings.TrimPrefix(l, "timestamp:"))
ci.Date, err = time.Parse(format, ts)
if err != nil {
return nil, NewLocalError("Unable to retrieve commit information", err, string(out))
}
} else if strings.TrimSpace(l) == "message:" {
track = i
trackOn = true
} else if trackOn && i > track {
ci.Message = ci.Message + l
}
}
ci.Message = strings.TrimSpace(ci.Message)
// Didn't find the revision
if ci.Author == "" {
return nil, ErrRevisionUnavailable
}
return ci, nil
}
// TagsFromCommit retrieves tags from a commit id.
func (s *BzrRepo) TagsFromCommit(id string) ([]string, error) {
out, err := s.RunFromDir("bzr", "tags", "-r", id)
if err != nil {
return []string{}, NewLocalError("Unable to retrieve tags", err, string(out))
}
tags := s.referenceList(string(out), `(?m-s)^(\S+)`)
return tags, nil
}
// Ping returns if remote location is accessible.
func (s *BzrRepo) Ping() bool {
// Running bzr info is slow. Many of the projects are on launchpad which
// has a public 1.0 API we can use.
u, err := url.Parse(s.Remote())
if err == nil {
if u.Host == "launchpad.net" {
try := strings.TrimPrefix(u.Path, "/")
// get returns the body and an err. If the status code is not a 200
// an error is returned. Launchpad returns a 404 for a codebase that
// does not exist. Otherwise it returns a JSON object describing it.
_, er := get("https://api.launchpad.net/1.0/" + try)
return er == nil
}
}
// This is the same command that Go itself uses but it's not fast (or fast
// enough by my standards). A faster method would be useful.
_, err = s.run("bzr", "info", s.Remote())
return err == nil
}
// ExportDir exports the current revision to the passed in directory.
func (s *BzrRepo) ExportDir(dir string) error {
out, err := s.RunFromDir("bzr", "export", dir)
s.log(out)
if err != nil {
return NewLocalError("Unable to export source", err, string(out))
}
return nil
}
// Multi-lingual manner check for the VCS error that it couldn't create directory.
// https://bazaar.launchpad.net/~bzr-pqm/bzr/bzr.dev/files/head:/po/
func (s *BzrRepo) isUnableToCreateDir(err error) bool {
msg := err.Error()
if strings.HasPrefix(msg, fmt.Sprintf("Parent directory of %s does not exist.", s.LocalPath())) ||
strings.HasPrefix(msg, fmt.Sprintf("Nadřazený adresář %s neexistuje.", s.LocalPath())) ||
strings.HasPrefix(msg, fmt.Sprintf("El directorio padre de %s no existe.", s.LocalPath())) ||
strings.HasPrefix(msg, fmt.Sprintf("%s の親ディレクトリがありません。", s.LocalPath())) ||
strings.HasPrefix(msg, fmt.Sprintf("Родительская директория для %s не существует.", s.LocalPath())) {
return true
}
return false
}
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