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+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package vcs exposes functions for resolving import paths
+// and using version control systems, which can be used to
+// implement behavior similar to the standard "go get" command.
+//
+// This package is a copy of internal code in package cmd/go/internal/get,
+// modified to make the identifiers exported. It's provided here
+// for developers who want to write tools with similar semantics.
+// It needs to be manually kept in sync with upstream when changes are
+// made to cmd/go/internal/get; see https://golang.org/issue/11490.
+//
+package vcs
+
+import (
+ "bytes"
+ "encoding/json"
+ "errors"
+ "fmt"
+ "log"
+ "net/url"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "regexp"
+ "strconv"
+ "strings"
+)
+
+// Verbose enables verbose operation logging.
+var Verbose bool
+
+// ShowCmd controls whether VCS commands are printed.
+var ShowCmd bool
+
+// A Cmd describes how to use a version control system
+// like Mercurial, Git, or Subversion.
+type Cmd struct {
+ Name string
+ Cmd string // name of binary to invoke command
+
+ CreateCmd string // command to download a fresh copy of a repository
+ DownloadCmd string // command to download updates into an existing repository
+
+ TagCmd []TagCmd // commands to list tags
+ TagLookupCmd []TagCmd // commands to lookup tags before running tagSyncCmd
+ TagSyncCmd string // command to sync to specific tag
+ TagSyncDefault string // command to sync to default tag
+
+ LogCmd string // command to list repository changelogs in an XML format
+
+ Scheme []string
+ PingCmd string
+}
+
+// A TagCmd describes a command to list available tags
+// that can be passed to Cmd.TagSyncCmd.
+type TagCmd struct {
+ Cmd string // command to list tags
+ Pattern string // regexp to extract tags from list
+}
+
+// vcsList lists the known version control systems
+var vcsList = []*Cmd{
+ vcsHg,
+ vcsGit,
+ vcsSvn,
+ vcsBzr,
+}
+
+// ByCmd returns the version control system for the given
+// command name (hg, git, svn, bzr).
+func ByCmd(cmd string) *Cmd {
+ for _, vcs := range vcsList {
+ if vcs.Cmd == cmd {
+ return vcs
+ }
+ }
+ return nil
+}
+
+// vcsHg describes how to use Mercurial.
+var vcsHg = &Cmd{
+ Name: "Mercurial",
+ Cmd: "hg",
+
+ CreateCmd: "clone -U {repo} {dir}",
+ DownloadCmd: "pull",
+
+ // We allow both tag and branch names as 'tags'
+ // for selecting a version. This lets people have
+ // a go.release.r60 branch and a go1 branch
+ // and make changes in both, without constantly
+ // editing .hgtags.
+ TagCmd: []TagCmd{
+ {"tags", `^(\S+)`},
+ {"branches", `^(\S+)`},
+ },
+ TagSyncCmd: "update -r {tag}",
+ TagSyncDefault: "update default",
+
+ LogCmd: "log --encoding=utf-8 --limit={limit} --template={template}",
+
+ Scheme: []string{"https", "http", "ssh"},
+ PingCmd: "identify {scheme}://{repo}",
+}
+
+// vcsGit describes how to use Git.
+var vcsGit = &Cmd{
+ Name: "Git",
+ Cmd: "git",
+
+ CreateCmd: "clone {repo} {dir}",
+ DownloadCmd: "pull --ff-only",
+
+ TagCmd: []TagCmd{
+ // tags/xxx matches a git tag named xxx
+ // origin/xxx matches a git branch named xxx on the default remote repository
+ {"show-ref", `(?:tags|origin)/(\S+)$`},
+ },
+ TagLookupCmd: []TagCmd{
+ {"show-ref tags/{tag} origin/{tag}", `((?:tags|origin)/\S+)$`},
+ },
+ TagSyncCmd: "checkout {tag}",
+ TagSyncDefault: "checkout master",
+
+ Scheme: []string{"git", "https", "http", "git+ssh"},
+ PingCmd: "ls-remote {scheme}://{repo}",
+}
+
+// vcsBzr describes how to use Bazaar.
+var vcsBzr = &Cmd{
+ Name: "Bazaar",
+ Cmd: "bzr",
+
+ CreateCmd: "branch {repo} {dir}",
+
+ // Without --overwrite bzr will not pull tags that changed.
+ // Replace by --overwrite-tags after http://pad.lv/681792 goes in.
+ DownloadCmd: "pull --overwrite",
+
+ TagCmd: []TagCmd{{"tags", `^(\S+)`}},
+ TagSyncCmd: "update -r {tag}",
+ TagSyncDefault: "update -r revno:-1",
+
+ Scheme: []string{"https", "http", "bzr", "bzr+ssh"},
+ PingCmd: "info {scheme}://{repo}",
+}
+
+// vcsSvn describes how to use Subversion.
+var vcsSvn = &Cmd{
+ Name: "Subversion",
+ Cmd: "svn",
+
+ CreateCmd: "checkout {repo} {dir}",
+ DownloadCmd: "update",
+
+ // There is no tag command in subversion.
+ // The branch information is all in the path names.
+
+ LogCmd: "log --xml --limit={limit}",
+
+ Scheme: []string{"https", "http", "svn", "svn+ssh"},
+ PingCmd: "info {scheme}://{repo}",
+}
+
+func (v *Cmd) String() string {
+ return v.Name
+}
+
+// run runs the command line cmd in the given directory.
+// keyval is a list of key, value pairs. run expands
+// instances of {key} in cmd into value, but only after
+// splitting cmd into individual arguments.
+// If an error occurs, run prints the command line and the
+// command's combined stdout+stderr to standard error.
+// Otherwise run discards the command's output.
+func (v *Cmd) run(dir string, cmd string, keyval ...string) error {
+ _, err := v.run1(dir, cmd, keyval, true)
+ return err
+}
+
+// runVerboseOnly is like run but only generates error output to standard error in verbose mode.
+func (v *Cmd) runVerboseOnly(dir string, cmd string, keyval ...string) error {
+ _, err := v.run1(dir, cmd, keyval, false)
+ return err
+}
+
+// runOutput is like run but returns the output of the command.
+func (v *Cmd) runOutput(dir string, cmd string, keyval ...string) ([]byte, error) {
+ return v.run1(dir, cmd, keyval, true)
+}
+
+// run1 is the generalized implementation of run and runOutput.
+func (v *Cmd) run1(dir string, cmdline string, keyval []string, verbose bool) ([]byte, error) {
+ m := make(map[string]string)
+ for i := 0; i < len(keyval); i += 2 {
+ m[keyval[i]] = keyval[i+1]
+ }
+ args := strings.Fields(cmdline)
+ for i, arg := range args {
+ args[i] = expand(m, arg)
+ }
+
+ _, err := exec.LookPath(v.Cmd)
+ if err != nil {
+ fmt.Fprintf(os.Stderr,
+ "go: missing %s command. See http://golang.org/s/gogetcmd\n",
+ v.Name)
+ return nil, err
+ }
+
+ cmd := exec.Command(v.Cmd, args...)
+ cmd.Dir = dir
+ cmd.Env = envForDir(cmd.Dir)
+ if ShowCmd {
+ fmt.Printf("cd %s\n", dir)
+ fmt.Printf("%s %s\n", v.Cmd, strings.Join(args, " "))
+ }
+ var buf bytes.Buffer
+ cmd.Stdout = &buf
+ cmd.Stderr = &buf
+ err = cmd.Run()
+ out := buf.Bytes()
+ if err != nil {
+ if verbose || Verbose {
+ fmt.Fprintf(os.Stderr, "# cd %s; %s %s\n", dir, v.Cmd, strings.Join(args, " "))
+ os.Stderr.Write(out)
+ }
+ return nil, err
+ }
+ return out, nil
+}
+
+// Ping pings the repo to determine if scheme used is valid.
+// This repo must be pingable with this scheme and VCS.
+func (v *Cmd) Ping(scheme, repo string) error {
+ return v.runVerboseOnly(".", v.PingCmd, "scheme", scheme, "repo", repo)
+}
+
+// Create creates a new copy of repo in dir.
+// The parent of dir must exist; dir must not.
+func (v *Cmd) Create(dir, repo string) error {
+ return v.run(".", v.CreateCmd, "dir", dir, "repo", repo)
+}
+
+// CreateAtRev creates a new copy of repo in dir at revision rev.
+// The parent of dir must exist; dir must not.
+// rev must be a valid revision in repo.
+func (v *Cmd) CreateAtRev(dir, repo, rev string) error {
+ if err := v.Create(dir, repo); err != nil {
+ return err
+ }
+ return v.run(dir, v.TagSyncCmd, "tag", rev)
+}
+
+// Download downloads any new changes for the repo in dir.
+// dir must be a valid VCS repo compatible with v.
+func (v *Cmd) Download(dir string) error {
+ return v.run(dir, v.DownloadCmd)
+}
+
+// Tags returns the list of available tags for the repo in dir.
+// dir must be a valid VCS repo compatible with v.
+func (v *Cmd) Tags(dir string) ([]string, error) {
+ var tags []string
+ for _, tc := range v.TagCmd {
+ out, err := v.runOutput(dir, tc.Cmd)
+ if err != nil {
+ return nil, err
+ }
+ re := regexp.MustCompile(`(?m-s)` + tc.Pattern)
+ for _, m := range re.FindAllStringSubmatch(string(out), -1) {
+ tags = append(tags, m[1])
+ }
+ }
+ return tags, nil
+}
+
+// TagSync syncs the repo in dir to the named tag, which is either a
+// tag returned by Tags or the empty string (the default tag).
+// dir must be a valid VCS repo compatible with v and the tag must exist.
+func (v *Cmd) TagSync(dir, tag string) error {
+ if v.TagSyncCmd == "" {
+ return nil
+ }
+ if tag != "" {
+ for _, tc := range v.TagLookupCmd {
+ out, err := v.runOutput(dir, tc.Cmd, "tag", tag)
+ if err != nil {
+ return err
+ }
+ re := regexp.MustCompile(`(?m-s)` + tc.Pattern)
+ m := re.FindStringSubmatch(string(out))
+ if len(m) > 1 {
+ tag = m[1]
+ break
+ }
+ }
+ }
+ if tag == "" && v.TagSyncDefault != "" {
+ return v.run(dir, v.TagSyncDefault)
+ }
+ return v.run(dir, v.TagSyncCmd, "tag", tag)
+}
+
+// Log logs the changes for the repo in dir.
+// dir must be a valid VCS repo compatible with v.
+func (v *Cmd) Log(dir, logTemplate string) ([]byte, error) {
+ if err := v.Download(dir); err != nil {
+ return []byte{}, err
+ }
+
+ const N = 50 // how many revisions to grab
+ return v.runOutput(dir, v.LogCmd, "limit", strconv.Itoa(N), "template", logTemplate)
+}
+
+// LogAtRev logs the change for repo in dir at the rev revision.
+// dir must be a valid VCS repo compatible with v.
+// rev must be a valid revision for the repo in dir.
+func (v *Cmd) LogAtRev(dir, rev, logTemplate string) ([]byte, error) {
+ if err := v.Download(dir); err != nil {
+ return []byte{}, err
+ }
+
+ // Append revision flag to LogCmd.
+ logAtRevCmd := v.LogCmd + " --rev=" + rev
+ return v.runOutput(dir, logAtRevCmd, "limit", strconv.Itoa(1), "template", logTemplate)
+}
+
+// A vcsPath describes how to convert an import path into a
+// version control system and repository name.
+type vcsPath struct {
+ prefix string // prefix this description applies to
+ re string // pattern for import path
+ repo string // repository to use (expand with match of re)
+ vcs string // version control system to use (expand with match of re)
+ check func(match map[string]string) error // additional checks
+ ping bool // ping for scheme to use to download repo
+
+ regexp *regexp.Regexp // cached compiled form of re
+}
+
+// FromDir inspects dir and its parents to determine the
+// version control system and code repository to use.
+// On return, root is the import path
+// corresponding to the root of the repository.
+func FromDir(dir, srcRoot string) (vcs *Cmd, root string, err error) {
+ // Clean and double-check that dir is in (a subdirectory of) srcRoot.
+ dir = filepath.Clean(dir)
+ srcRoot = filepath.Clean(srcRoot)
+ if len(dir) <= len(srcRoot) || dir[len(srcRoot)] != filepath.Separator {
+ return nil, "", fmt.Errorf("directory %q is outside source root %q", dir, srcRoot)
+ }
+
+ var vcsRet *Cmd
+ var rootRet string
+
+ origDir := dir
+ for len(dir) > len(srcRoot) {
+ for _, vcs := range vcsList {
+ if _, err := os.Stat(filepath.Join(dir, "."+vcs.Cmd)); err == nil {
+ root := filepath.ToSlash(dir[len(srcRoot)+1:])
+ // Record first VCS we find, but keep looking,
+ // to detect mistakes like one kind of VCS inside another.
+ if vcsRet == nil {
+ vcsRet = vcs
+ rootRet = root
+ continue
+ }
+ // Allow .git inside .git, which can arise due to submodules.
+ if vcsRet == vcs && vcs.Cmd == "git" {
+ continue
+ }
+ // Otherwise, we have one VCS inside a different VCS.
+ return nil, "", fmt.Errorf("directory %q uses %s, but parent %q uses %s",
+ filepath.Join(srcRoot, rootRet), vcsRet.Cmd, filepath.Join(srcRoot, root), vcs.Cmd)
+ }
+ }
+
+ // Move to parent.
+ ndir := filepath.Dir(dir)
+ if len(ndir) >= len(dir) {
+ // Shouldn't happen, but just in case, stop.
+ break
+ }
+ dir = ndir
+ }
+
+ if vcsRet != nil {
+ return vcsRet, rootRet, nil
+ }
+
+ return nil, "", fmt.Errorf("directory %q is not using a known version control system", origDir)
+}
+
+// RepoRoot represents a version control system, a repo, and a root of
+// where to put it on disk.
+type RepoRoot struct {
+ VCS *Cmd
+
+ // Repo is the repository URL, including scheme.
+ Repo string
+
+ // Root is the import path corresponding to the root of the
+ // repository.
+ Root string
+}
+
+// RepoRootForImportPath analyzes importPath to determine the
+// version control system, and code repository to use.
+func RepoRootForImportPath(importPath string, verbose bool) (*RepoRoot, error) {
+ rr, err := RepoRootForImportPathStatic(importPath, "")
+ if err == errUnknownSite {
+ rr, err = RepoRootForImportDynamic(importPath, verbose)
+
+ // RepoRootForImportDynamic returns error detail
+ // that is irrelevant if the user didn't intend to use a
+ // dynamic import in the first place.
+ // Squelch it.
+ if err != nil {
+ if Verbose {
+ log.Printf("import %q: %v", importPath, err)
+ }
+ err = fmt.Errorf("unrecognized import path %q", importPath)
+ }
+ }
+
+ if err == nil && strings.Contains(importPath, "...") && strings.Contains(rr.Root, "...") {
+ // Do not allow wildcards in the repo root.
+ rr = nil
+ err = fmt.Errorf("cannot expand ... in %q", importPath)
+ }
+ return rr, err
+}
+
+var errUnknownSite = errors.New("dynamic lookup required to find mapping")
+
+// RepoRootForImportPathStatic attempts to map importPath to a
+// RepoRoot using the commonly-used VCS hosting sites in vcsPaths
+// (github.com/user/dir), or from a fully-qualified importPath already
+// containing its VCS type (foo.com/repo.git/dir)
+//
+// If scheme is non-empty, that scheme is forced.
+func RepoRootForImportPathStatic(importPath, scheme string) (*RepoRoot, error) {
+ if strings.Contains(importPath, "://") {
+ return nil, fmt.Errorf("invalid import path %q", importPath)
+ }
+ for _, srv := range vcsPaths {
+ if !strings.HasPrefix(importPath, srv.prefix) {
+ continue
+ }
+ m := srv.regexp.FindStringSubmatch(importPath)
+ if m == nil {
+ if srv.prefix != "" {
+ return nil, fmt.Errorf("invalid %s import path %q", srv.prefix, importPath)
+ }
+ continue
+ }
+
+ // Build map of named subexpression matches for expand.
+ match := map[string]string{
+ "prefix": srv.prefix,
+ "import": importPath,
+ }
+ for i, name := range srv.regexp.SubexpNames() {
+ if name != "" && match[name] == "" {
+ match[name] = m[i]
+ }
+ }
+ if srv.vcs != "" {
+ match["vcs"] = expand(match, srv.vcs)
+ }
+ if srv.repo != "" {
+ match["repo"] = expand(match, srv.repo)
+ }
+ if srv.check != nil {
+ if err := srv.check(match); err != nil {
+ return nil, err
+ }
+ }
+ vcs := ByCmd(match["vcs"])
+ if vcs == nil {
+ return nil, fmt.Errorf("unknown version control system %q", match["vcs"])
+ }
+ if srv.ping {
+ if scheme != "" {
+ match["repo"] = scheme + "://" + match["repo"]
+ } else {
+ for _, scheme := range vcs.Scheme {
+ if vcs.Ping(scheme, match["repo"]) == nil {
+ match["repo"] = scheme + "://" + match["repo"]
+ break
+ }
+ }
+ }
+ }
+ rr := &RepoRoot{
+ VCS: vcs,
+ Repo: match["repo"],
+ Root: match["root"],
+ }
+ return rr, nil
+ }
+ return nil, errUnknownSite
+}
+
+// RepoRootForImportDynamic finds a *RepoRoot for a custom domain that's not
+// statically known by RepoRootForImportPathStatic.
+//
+// This handles custom import paths like "name.tld/pkg/foo" or just "name.tld".
+func RepoRootForImportDynamic(importPath string, verbose bool) (*RepoRoot, error) {
+ slash := strings.Index(importPath, "/")
+ if slash < 0 {
+ slash = len(importPath)
+ }
+ host := importPath[:slash]
+ if !strings.Contains(host, ".") {
+ return nil, errors.New("import path doesn't contain a hostname")
+ }
+ urlStr, body, err := httpsOrHTTP(importPath)
+ if err != nil {
+ return nil, fmt.Errorf("http/https fetch: %v", err)
+ }
+ defer body.Close()
+ imports, err := parseMetaGoImports(body)
+ if err != nil {
+ return nil, fmt.Errorf("parsing %s: %v", importPath, err)
+ }
+ metaImport, err := matchGoImport(imports, importPath)
+ if err != nil {
+ if err != errNoMatch {
+ return nil, fmt.Errorf("parse %s: %v", urlStr, err)
+ }
+ return nil, fmt.Errorf("parse %s: no go-import meta tags", urlStr)
+ }
+ if verbose {
+ log.Printf("get %q: found meta tag %#v at %s", importPath, metaImport, urlStr)
+ }
+ // If the import was "uni.edu/bob/project", which said the
+ // prefix was "uni.edu" and the RepoRoot was "evilroot.com",
+ // make sure we don't trust Bob and check out evilroot.com to
+ // "uni.edu" yet (possibly overwriting/preempting another
+ // non-evil student). Instead, first verify the root and see
+ // if it matches Bob's claim.
+ if metaImport.Prefix != importPath {
+ if verbose {
+ log.Printf("get %q: verifying non-authoritative meta tag", importPath)
+ }
+ urlStr0 := urlStr
+ urlStr, body, err = httpsOrHTTP(metaImport.Prefix)
+ if err != nil {
+ return nil, fmt.Errorf("fetch %s: %v", urlStr, err)
+ }
+ imports, err := parseMetaGoImports(body)
+ if err != nil {
+ return nil, fmt.Errorf("parsing %s: %v", importPath, err)
+ }
+ if len(imports) == 0 {
+ return nil, fmt.Errorf("fetch %s: no go-import meta tag", urlStr)
+ }
+ metaImport2, err := matchGoImport(imports, importPath)
+ if err != nil || metaImport != metaImport2 {
+ return nil, fmt.Errorf("%s and %s disagree about go-import for %s", urlStr0, urlStr, metaImport.Prefix)
+ }
+ }
+
+ if err := validateRepoRoot(metaImport.RepoRoot); err != nil {
+ return nil, fmt.Errorf("%s: invalid repo root %q: %v", urlStr, metaImport.RepoRoot, err)
+ }
+ rr := &RepoRoot{
+ VCS: ByCmd(metaImport.VCS),
+ Repo: metaImport.RepoRoot,
+ Root: metaImport.Prefix,
+ }
+ if rr.VCS == nil {
+ return nil, fmt.Errorf("%s: unknown vcs %q", urlStr, metaImport.VCS)
+ }
+ return rr, nil
+}
+
+// validateRepoRoot returns an error if repoRoot does not seem to be
+// a valid URL with scheme.
+func validateRepoRoot(repoRoot string) error {
+ url, err := url.Parse(repoRoot)
+ if err != nil {
+ return err
+ }
+ if url.Scheme == "" {
+ return errors.New("no scheme")
+ }
+ return nil
+}
+
+// metaImport represents the parsed <meta name="go-import"
+// content="prefix vcs reporoot" /> tags from HTML files.
+type metaImport struct {
+ Prefix, VCS, RepoRoot string
+}
+
+// errNoMatch is returned from matchGoImport when there's no applicable match.
+var errNoMatch = errors.New("no import match")
+
+// pathPrefix reports whether sub is a prefix of s,
+// only considering entire path components.
+func pathPrefix(s, sub string) bool {
+ // strings.HasPrefix is necessary but not sufficient.
+ if !strings.HasPrefix(s, sub) {
+ return false
+ }
+ // The remainder after the prefix must either be empty or start with a slash.
+ rem := s[len(sub):]
+ return rem == "" || rem[0] == '/'
+}
+
+// matchGoImport returns the metaImport from imports matching importPath.
+// An error is returned if there are multiple matches.
+// errNoMatch is returned if none match.
+func matchGoImport(imports []metaImport, importPath string) (_ metaImport, err error) {
+ match := -1
+ for i, im := range imports {
+ if !pathPrefix(importPath, im.Prefix) {
+ continue
+ }
+
+ if match != -1 {
+ err = fmt.Errorf("multiple meta tags match import path %q", importPath)
+ return
+ }
+ match = i
+ }
+ if match == -1 {
+ err = errNoMatch
+ return
+ }
+ return imports[match], nil
+}
+
+// expand rewrites s to replace {k} with match[k] for each key k in match.
+func expand(match map[string]string, s string) string {
+ for k, v := range match {
+ s = strings.Replace(s, "{"+k+"}", v, -1)
+ }
+ return s
+}
+
+// vcsPaths lists the known vcs paths.
+var vcsPaths = []*vcsPath{
+ // Github
+ {
+ prefix: "github.com/",
+ re: `^(?P<root>github\.com/[A-Za-z0-9_.\-]+/[A-Za-z0-9_.\-]+)(/[\p{L}0-9_.\-]+)*$`,
+ vcs: "git",
+ repo: "https://{root}",
+ check: noVCSSuffix,
+ },
+
+ // Bitbucket
+ {
+ prefix: "bitbucket.org/",
+ re: `^(?P<root>bitbucket\.org/(?P<bitname>[A-Za-z0-9_.\-]+/[A-Za-z0-9_.\-]+))(/[A-Za-z0-9_.\-]+)*$`,
+ repo: "https://{root}",
+ check: bitbucketVCS,
+ },
+
+ // Launchpad
+ {
+ prefix: "launchpad.net/",
+ re: `^(?P<root>launchpad\.net/((?P<project>[A-Za-z0-9_.\-]+)(?P<series>/[A-Za-z0-9_.\-]+)?|~[A-Za-z0-9_.\-]+/(\+junk|[A-Za-z0-9_.\-]+)/[A-Za-z0-9_.\-]+))(/[A-Za-z0-9_.\-]+)*$`,
+ vcs: "bzr",
+ repo: "https://{root}",
+ check: launchpadVCS,
+ },
+
+ // Git at OpenStack
+ {
+ prefix: "git.openstack.org",
+ re: `^(?P<root>git\.openstack\.org/[A-Za-z0-9_.\-]+/[A-Za-z0-9_.\-]+)(\.git)?(/[A-Za-z0-9_.\-]+)*$`,
+ vcs: "git",
+ repo: "https://{root}",
+ check: noVCSSuffix,
+ },
+
+ // General syntax for any server.
+ {
+ re: `^(?P<root>(?P<repo>([a-z0-9.\-]+\.)+[a-z0-9.\-]+(:[0-9]+)?/[A-Za-z0-9_.\-/]*?)\.(?P<vcs>bzr|git|hg|svn))(/[A-Za-z0-9_.\-]+)*$`,
+ ping: true,
+ },
+}
+
+func init() {
+ // fill in cached regexps.
+ // Doing this eagerly discovers invalid regexp syntax
+ // without having to run a command that needs that regexp.
+ for _, srv := range vcsPaths {
+ srv.regexp = regexp.MustCompile(srv.re)
+ }
+}
+
+// noVCSSuffix checks that the repository name does not
+// end in .foo for any version control system foo.
+// The usual culprit is ".git".
+func noVCSSuffix(match map[string]string) error {
+ repo := match["repo"]
+ for _, vcs := range vcsList {
+ if strings.HasSuffix(repo, "."+vcs.Cmd) {
+ return fmt.Errorf("invalid version control suffix in %s path", match["prefix"])
+ }
+ }
+ return nil
+}
+
+// bitbucketVCS determines the version control system for a
+// Bitbucket repository, by using the Bitbucket API.
+func bitbucketVCS(match map[string]string) error {
+ if err := noVCSSuffix(match); err != nil {
+ return err
+ }
+
+ var resp struct {
+ SCM string `json:"scm"`
+ }
+ url := expand(match, "https://api.bitbucket.org/2.0/repositories/{bitname}?fields=scm")
+ data, err := httpGET(url)
+ if err != nil {
+ return err
+ }
+ if err := json.Unmarshal(data, &resp); err != nil {
+ return fmt.Errorf("decoding %s: %v", url, err)
+ }
+
+ if ByCmd(resp.SCM) != nil {
+ match["vcs"] = resp.SCM
+ if resp.SCM == "git" {
+ match["repo"] += ".git"
+ }
+ return nil
+ }
+
+ return fmt.Errorf("unable to detect version control system for bitbucket.org/ path")
+}
+
+// launchpadVCS solves the ambiguity for "lp.net/project/foo". In this case,
+// "foo" could be a series name registered in Launchpad with its own branch,
+// and it could also be the name of a directory within the main project
+// branch one level up.
+func launchpadVCS(match map[string]string) error {
+ if match["project"] == "" || match["series"] == "" {
+ return nil
+ }
+ _, err := httpGET(expand(match, "https://code.launchpad.net/{project}{series}/.bzr/branch-format"))
+ if err != nil {
+ match["root"] = expand(match, "launchpad.net/{project}")
+ match["repo"] = expand(match, "https://{root}")
+ }
+ return nil
+}
generated by cgit v1.3 (git 2.53.0) at 2026-04-15 03:53:38 +0000