func NewDependency(importStr string, urlStr string, versionStr string) (*Dependency, error) {
var err error
dep := &Dependency{
Import: importStr,
}
if urlStr == "" {
dep.Url = nil
} else if dep.Url, err = url.Parse(urlStr); err != nil {
return nil, err
} else if dep.Url.Scheme == "" {
return nil, fmt.Errorf("Url must have a scheme specified.")
}
if versionStr == "" {
dep.VersionSpec = NewVersionSpec(OpEq, -1, -1, -1)
} else if dep.VersionSpec, err = ParseVersionSpec(versionStr); err != nil {
return nil, err
}
// figure out import from URL if not set
if dep.Import == "" {
if dep.Url == nil {
return nil, fmt.Errorf("Must have an 'import' or 'url' specified")
} else {
dep.Import = dep.Url.Host + "/" + dep.Url.Path
}
}
return dep, nil
}
func (self *Dependency) SetValues(valueMap map[string]string) error {
for _, key := range []string{"import", "type", "branch", "tag",
"url", "scheme", "host", "path", "port"} {
value, ok := valueMap[key]
if !ok {
continue // value not in map
}
// set the value
switch key {
case "import":
self.Import = value
case "type":
self.Type = value
case "branch":
self.Branch = value
case "tag":
self.Tag = value
case "url":
if urlValue, err := url.Parse(value); err != nil {
return fmt.Errorf("Error setting dependency url: %v", err)
} else {
self.Url = urlValue
}
}
if self.Url != nil {
switch key {
case "scheme":
self.Url.Scheme = value
case "host":
self.Url.Host = value
case "path":
self.Url.Path = value
case "port":
self.Url.Port = value
}
} else {
switch key {
case "scheme":
self.Url = &url.URL{Scheme: value}
case "host":
self.Url = &url.URL{Host: value}
case "path":
self.Url = &url.URL{Path: value}
case "port":
self.Url = &url.URL{Port: value}
}
}
}
return nil
}
func (self *GitSCM) Resolve(dep *Dependency) (*Library, error) {
lib := NewLibrary(dep)
// fix the tag, and default branch
if lib.Branch == "" {
lib.Branch = "master"
}
if lib.Tag == "" {
lib.Tag = "HEAD"
}
log.Info("Fetching Git Dependency: '%s'", lib.Import)
// create a dedicated directory and a context for commands
tempRoot, err := ioutil.TempDir("", "")
if err != nil {
return nil, err
}
lib.TempDir = tempRoot
cmd := NewRunContext(tempRoot)
// use the configured url and acquire the depified branch
log.Info("Fetching remote data for %s", lib.Import)
if lib.Url == nil {
// try all supported protocols against a URL composed from the import
for _, protocol := range []string{"http", "https", "git", "ssh"} {
packageUrl := protocol + "://" + lib.Import
log.Warn("Synthesizing url from import: '%s'", packageUrl)
if err := cmd.Run("git", "clone", packageUrl, "-b", lib.Branch, tempRoot); err != nil {
log.Warn("Failed to fetch: '%s'", packageUrl)
continue
}
lib.Url, _ = url.Parse(packageUrl) // pin URL
break
}
if err != nil {
return nil, fmt.Errorf("Cannot download dependency: '%s'", lib.Import)
}
} else if err := cmd.Run("git", "clone", lib.Url.String(), "-b", lib.Branch, tempRoot); err != nil {
return nil, fmt.Errorf("Cannot download dependency: '%s'", lib.Url.String())
}
// move to the specified commit/tag/hash
// check out a depific commit - may be a tag, commit hash or HEAD
if err := cmd.Run("git", "checkout", lib.Tag); err != nil {
return nil, fmt.Errorf("Failed to checkout tag: '%s'", lib.Tag)
}
// Pin the Tag to a commit hash if we just have "HEAD" as the 'Tag'
if lib.Tag == "HEAD" {
if err := cmd.Run("git", "rev-list", "--all", "--max-count=1"); err != nil {
return nil, fmt.Errorf("Failed to checkout tag: '%s'", lib.Tag)
} else {
lib.Tag = strings.TrimSpace(cmd.CombinedOutput)
}
}
// Stop now if we have no semantic version information
if lib.VersionSpec.IsUnversioned() {
lib.Version = NewVersion(-1, -1, -1)
log.Warn("Resolved: %v (unversioned)", lib.Import)
stripGitRepo(lib.TempDir)
return lib, nil
}
// find latest version match
if err := cmd.Run("git", "for-each-ref", "refs/tags", "--sort=taggerdate",
"--format=%(refname:short)"); err != nil {
return nil, fmt.Errorf("Failed to acquire ref list for depenency")
} else {
for _, line := range strings.Split(cmd.CombinedOutput, "\n") {
log.Debug("%v", line)
if ver, err := ParseVersion(line); err == nil {
log.Debug("ver: %v", ver)
if dep.VersionSpec.IsSatisfiedBy(ver) {
lib.Tag = line
lib.Version = ver
// move to this tag in the history
if err := cmd.Run("git", "checkout", lib.Tag); err != nil {
return nil, fmt.Errorf("Failed to checkout tag: '%s'", lib.Tag)
}
break
}
} else {
log.Debug("Parse git tag err: %v", err)
}
}
}
// fail if the tag cannot be determined.
if lib.Version == nil {
return nil, fmt.Errorf("Cannot find a tag for dependency version specification: %v.", lib.VersionSpec)
}
log.Info("Resolved: %s %v", lib.Import, lib.Version)
stripGitRepo(lib.TempDir)
return lib, nil
}
