Golang Dependency.Remote方法代码示例

func getWizard(dep *cfg.Dependency) {
	remote := dep.Remote()

	// Lookup dependency info and store in cache.
	msg.Info("--> Gathering release information for %s", dep.Name)
	wizardFindVersions(dep)

	memlatest := cache.MemLatest(remote)
	if memlatest != "" {
		dres := wizardAskLatest(memlatest, dep)
		if dres {
			dep.Reference = memlatest

			sv, err := semver.NewVersion(dep.Reference)
			if err == nil {
				res := wizardAskRange(sv, dep)
				if res == "m" {
					dep.Reference = "^" + sv.String()
				} else if res == "p" {
					dep.Reference = "~" + sv.String()
				}
			}
		}
	}
}

// VcsGet figures out how to fetch a dependency, and then gets it.
//
// VcsGet installs into the cache.
func VcsGet(dep *cfg.Dependency) error {

	key, err := cp.Key(dep.Remote())
	if err != nil {
		msg.Die("Cache key generation error: %s", err)
	}
	location := cp.Location()
	d := filepath.Join(location, "src", key)

	repo, err := dep.GetRepo(d)
	if err != nil {
		return err
	}
	// If the directory does not exist this is a first cache.
	if _, err = os.Stat(d); os.IsNotExist(err) {
		msg.Debug("Adding %s to the cache for the first time", dep.Name)
		err = repo.Get()
		if err != nil {
			return err
		}
		branch := findCurrentBranch(repo)
		if branch != "" {
			msg.Debug("Saving default branch for %s", repo.Remote())
			c := cp.RepoInfo{DefaultBranch: branch}
			err = cp.SaveRepoData(key, c)
			if err == cp.ErrCacheDisabled {
				msg.Debug("Unable to cache default branch because caching is disabled")
			} else if err != nil {
				msg.Debug("Error saving %s to cache. Error: %s", repo.Remote(), err)
			}
		}
	} else {
		msg.Debug("Updating %s in the cache", dep.Name)
		err = repo.Update()
		if err != nil {
			return err
		}
	}

	return nil
}

func wizardFindVersions(d *cfg.Dependency) {
	l := cache.Location()
	remote := d.Remote()

	key, err := cache.Key(remote)
	if err != nil {
		msg.Debug("Problem generating cache key for %s: %s", remote, err)
		return
	}

	local := filepath.Join(l, "src", key)
	repo, err := vcs.NewRepo(remote, local)
	if err != nil {
		msg.Debug("Problem getting repo instance: %s", err)
		return
	}

	var useLocal bool
	if _, err = os.Stat(local); err == nil {
		useLocal = true
	}

	// Git endpoints allow for querying without fetching the codebase locally.
	// We try that first to avoid fetching right away. Is this premature
	// optimization?
	cc := true
	if !useLocal && repo.Vcs() == vcs.Git {
		out, err2 := exec.Command("git", "ls-remote", remote).CombinedOutput()
		if err2 == nil {
			cache.MemTouch(remote)
			cc = false
			lines := strings.Split(string(out), "\n")
			for _, i := range lines {
				ti := strings.TrimSpace(i)
				if found := createGitParseVersion.FindString(ti); found != "" {
					tg := strings.TrimPrefix(strings.TrimSuffix(found, "^{}"), "tags/")
					cache.MemPut(remote, tg)
					if d.Reference != "" && strings.HasPrefix(ti, d.Reference) {
						cache.MemSetCurrent(remote, tg)
					}
				}
			}
		}
	}

	if cc {
		cache.Lock(key)
		cache.MemTouch(remote)
		if _, err = os.Stat(local); os.IsNotExist(err) {
			repo.Get()
			branch := findCurrentBranch(repo)
			c := cache.RepoInfo{DefaultBranch: branch}
			err = cache.SaveRepoData(key, c)
			if err != nil {
				msg.Debug("Error saving cache repo details: %s", err)
			}
		} else {
			repo.Update()
		}
		tgs, err := repo.Tags()
		if err != nil {
			msg.Debug("Problem getting tags: %s", err)
		} else {
			for _, v := range tgs {
				cache.MemPut(remote, v)
			}
		}
		if d.Reference != "" && repo.IsReference(d.Reference) {
			tgs, err = repo.TagsFromCommit(d.Reference)
			if err != nil {
				msg.Debug("Problem getting tags for commit: %s", err)
			} else {
				if len(tgs) > 0 {
					for _, v := range tgs {
						if !(repo.Vcs() == vcs.Hg && v == "tip") {
							cache.MemSetCurrent(remote, v)
						}
					}
				}
			}
		}
		cache.Unlock(key)
	}
}

// VcsUpdate updates to a particular checkout based on the VCS setting.
func VcsUpdate(dep *cfg.Dependency, force bool, updated *UpdateTracker) error {

	// If the dependency has already been pinned we can skip it. This is a
	// faster path so we don't need to resolve it again.
	if dep.Pin != "" {
		msg.Debug("Dependency %s has already been pinned. Fetching updates skipped.", dep.Name)
		return nil
	}

	if updated.Check(dep.Name) {
		msg.Debug("%s was already updated, skipping.", dep.Name)
		return nil
	}
	updated.Add(dep.Name)

	if filterArchOs(dep) {
		msg.Info("%s is not used for %s/%s.\n", dep.Name, runtime.GOOS, runtime.GOARCH)
		return nil
	}

	key, err := cp.Key(dep.Remote())
	if err != nil {
		msg.Die("Cache key generation error: %s", err)
	}
	location := cp.Location()
	dest := filepath.Join(location, "src", key)

	// If destination doesn't exist we need to perform an initial checkout.
	if _, err := os.Stat(dest); os.IsNotExist(err) {
		msg.Info("--> Fetching %s.", dep.Name)
		if err = VcsGet(dep); err != nil {
			msg.Warn("Unable to checkout %s\n", dep.Name)
			return err
		}
	} else {
		// At this point we have a directory for the package.
		msg.Info("--> Fetching updates for %s.", dep.Name)

		// When the directory is not empty and has no VCS directory it's
		// a vendored files situation.
		empty, err := gpath.IsDirectoryEmpty(dest)
		if err != nil {
			return err
		}
		_, err = v.DetectVcsFromFS(dest)
		if empty == true && err == v.ErrCannotDetectVCS {
			msg.Warn("Cached version of %s is an empty directory. Fetching a new copy of the dependency.", dep.Name)
			msg.Debug("Removing empty directory %s", dest)
			err := os.RemoveAll(dest)
			if err != nil {
				return err
			}
			if err = VcsGet(dep); err != nil {
				msg.Warn("Unable to checkout %s\n", dep.Name)
				return err
			}
		} else {
			repo, err := dep.GetRepo(dest)

			// Tried to checkout a repo to a path that does not work. Either the
			// type or endpoint has changed. Force is being passed in so the old
			// location can be removed and replaced with the new one.
			// Warning, any changes in the old location will be deleted.
			// TODO: Put dirty checking in on the existing local checkout.
			if (err == v.ErrWrongVCS || err == v.ErrWrongRemote) && force == true {
				newRemote := dep.Remote()

				msg.Warn("Replacing %s with contents from %s\n", dep.Name, newRemote)
				rerr := os.RemoveAll(dest)
				if rerr != nil {
					return rerr
				}
				if err = VcsGet(dep); err != nil {
					msg.Warn("Unable to checkout %s\n", dep.Name)
					return err
				}

				repo, err = dep.GetRepo(dest)
				if err != nil {
					return err
				}
			} else if err != nil {
				return err
			} else if repo.IsDirty() {
				return fmt.Errorf("%s contains uncommitted changes. Skipping update", dep.Name)
			}

			ver := dep.Reference
			if ver == "" {
				ver = defaultBranch(repo)
			}
			// Check if the current version is a tag or commit id. If it is
			// and that version is already checked out we can skip updating
			// which is faster than going out to the Internet to perform
			// an update.
			if ver != "" {
				version, err := repo.Version()
				if err != nil {
					return err
//.........这里部分代码省略.........

// VcsVersion set the VCS version for a checkout.
func VcsVersion(dep *cfg.Dependency) error {

	// If the dependency has already been pinned we can skip it. This is a
	// faster path so we don't need to resolve it again.
	if dep.Pin != "" {
		msg.Debug("Dependency %s has already been pinned. Setting version skipped.", dep.Name)
		return nil
	}

	key, err := cp.Key(dep.Remote())
	if err != nil {
		msg.Die("Cache key generation error: %s", err)
	}
	location := cp.Location()
	cwd := filepath.Join(location, "src", key)

	// If there is no reference configured there is nothing to set.
	if dep.Reference == "" {
		// Before exiting update the pinned version
		repo, err := dep.GetRepo(cwd)
		if err != nil {
			return err
		}
		dep.Pin, err = repo.Version()
		if err != nil {
			return err
		}
		return nil
	}

	// When the directory is not empty and has no VCS directory it's
	// a vendored files situation.
	empty, err := gpath.IsDirectoryEmpty(cwd)
	if err != nil {
		return err
	}
	_, err = v.DetectVcsFromFS(cwd)
	if empty == false && err == v.ErrCannotDetectVCS {
		return fmt.Errorf("Cache directory missing VCS information for %s", dep.Name)
	}

	repo, err := dep.GetRepo(cwd)
	if err != nil {
		return err
	}

	ver := dep.Reference
	// References in Git can begin with a ^ which is similar to semver.
	// If there is a ^ prefix we assume it's a semver constraint rather than
	// part of the git/VCS commit id.
	if repo.IsReference(ver) && !strings.HasPrefix(ver, "^") {
		msg.Info("--> Setting version for %s to %s.\n", dep.Name, ver)
	} else {

		// Create the constraint first to make sure it's valid before
		// working on the repo.
		constraint, err := semver.NewConstraint(ver)

		// Make sure the constriant is valid. At this point it's not a valid
		// reference so if it's not a valid constrint we can exit early.
		if err != nil {
			msg.Warn("The reference '%s' is not valid\n", ver)
			return err
		}

		// Get the tags and branches (in that order)
		refs, err := getAllVcsRefs(repo)
		if err != nil {
			return err
		}

		// Convert and filter the list to semver.Version instances
		semvers := getSemVers(refs)

		// Sort semver list
		sort.Sort(sort.Reverse(semver.Collection(semvers)))
		found := false
		for _, v := range semvers {
			if constraint.Check(v) {
				found = true
				// If the constrint passes get the original reference
				ver = v.Original()
				break
			}
		}
		if found {
			msg.Info("--> Detected semantic version. Setting version for %s to %s.", dep.Name, ver)
		} else {
			msg.Warn("--> Unable to find semantic version for constraint %s %s", dep.Name, ver)
		}
	}
	if err := repo.UpdateVersion(ver); err != nil {
		return err
	}
	dep.Pin, err = repo.Version()
	if err != nil {
		return err
	}

//.........这里部分代码省略.........