// FetchAndRender will fetch the given image and all of its dependencies if
// they have not been fetched yet, and will then render them on to the
// filesystem if they have not been rendered yet.
func (r Registry) FetchAndRender(imagename types.ACIdentifier, labels types.Labels, size uint) error {
_, err := r.GetACI(imagename, labels)
if err == ErrNotFound {
err := r.fetchACIWithSize(imagename, labels, size)
if err != nil {
return err
}
}
filesToRender, err := acirenderer.GetRenderedACI(imagename,
labels, r)
if err != nil {
return err
}
for _, fs := range filesToRender {
ex, err := util.Exists(path.Join(r.Scratchpath, fs.Key, "rendered"))
if err != nil {
return err
}
if ex {
//This ACI has already been rendered
continue
}
err = util.UnTar(path.Join(r.Depstore, fs.Key),
path.Join(r.Scratchpath, fs.Key), fs.FileMap)
if err != nil {
return err
}
rfile, err := os.Create(path.Join(r.Scratchpath, fs.Key, "rendered"))
if err != nil {
return err
}
rfile.Close()
}
return nil
}
// FetchAndRender will fetch the given image and all of its dependencies if
// they have not been fetched yet, and will then render them on to the
// filesystem if they have not been rendered yet.
func (r Registry) FetchAndRender(imagename types.ACIdentifier, labels types.Labels, size uint) error {
err := r.Fetch(imagename, labels, size, true)
if err != nil {
return err
}
filesToRender, err := acirenderer.GetRenderedACI(imagename,
labels, r)
if err != nil {
return err
}
for _, fs := range filesToRender {
ex, err := util.Exists(
path.Join(r.DepStoreExpandedPath, fs.Key, "rendered"))
if err != nil {
return err
}
if ex {
//This ACI has already been rendered
continue
}
err = util.UnTar(path.Join(r.DepStoreTarPath, fs.Key),
path.Join(r.DepStoreExpandedPath, fs.Key), fs.FileMap)
if err != nil {
return err
}
rfile, err := os.Create(
path.Join(r.DepStoreExpandedPath, fs.Key, "rendered"))
if err != nil {
return err
}
rfile.Close()
}
return nil
}
func (a *ACBuild) beginFromImage(start string, insecure bool) error {
// Check if we're starting with a file
finfo, err := os.Stat(start)
if err == nil {
if finfo.IsDir() {
return fmt.Errorf("provided starting ACI is a directory: %s", start)
}
return util.UnTar(start, a.CurrentACIPath, nil)
} else if !os.IsNotExist(err) {
return err
}
// Check if we're starting with a docker image
if strings.HasPrefix(start, "docker://") {
// TODO use docker2aci
return fmt.Errorf("docker containers are currently unsupported")
}
// Perform meta discovery, download the ACI, and start with that.
app, err := discovery.NewAppFromString(start)
if err != nil {
return err
}
labels, err := types.LabelsFromMap(app.Labels)
if err != nil {
return err
}
tmpDepStoreTarPath, err := ioutil.TempDir("", "acbuild-begin-tar")
if err != nil {
return err
}
defer os.RemoveAll(tmpDepStoreTarPath)
tmpDepStoreExpandedPath, err := ioutil.TempDir("", "acbuild-begin-expanded")
if err != nil {
return err
}
defer os.RemoveAll(tmpDepStoreExpandedPath)
reg := registry.Registry{
DepStoreTarPath: tmpDepStoreTarPath,
DepStoreExpandedPath: tmpDepStoreExpandedPath,
Insecure: insecure,
Debug: a.Debug,
}
err = reg.Fetch(app.Name, labels, 0, false)
if err != nil {
return err
}
files, err := ioutil.ReadDir(tmpDepStoreTarPath)
if err != nil {
return err
}
if len(files) != 1 {
var filelist string
for _, file := range files {
if filelist == "" {
filelist = file.Name()
} else {
filelist = filelist + ", " + file.Name()
}
}
panic("unexpected number of files in store after download: " + filelist)
}
return util.UnTar(path.Join(tmpDepStoreTarPath, files[0].Name()), a.CurrentACIPath, nil)
}
// Begin will start a new build, storing the untarred ACI the build operates on
// at tmpaci. If start is the empty string, the build will begin with an empty
// ACI, otherwise the ACI stored at start will be used at the starting point.
func Begin(tmpaci, start string) error {
ex, err := util.Exists(tmpaci)
if err != nil {
return err
}
if ex {
return fmt.Errorf("build already in progress? path exists: %s", tmpaci)
}
err = os.MkdirAll(path.Join(tmpaci, aci.RootfsDir), 0755)
if err != nil {
return err
}
if start != "" {
ex, err := util.Exists(start)
if err != nil {
return err
}
if !ex {
return fmt.Errorf("start aci doesn't exist: %s", start)
}
err = util.UnTar(start, tmpaci, nil)
if err != nil {
return err
}
return nil
}
acid, err := types.NewACIdentifier("acbuild-unnamed")
if err != nil {
return err
}
manifest := &schema.ImageManifest{
ACKind: schema.ImageManifestKind,
ACVersion: schema.AppContainerVersion,
Name: *acid,
App: &types.App{
Exec: placeholderexec,
User: "******",
Group: "0",
},
}
manblob, err := manifest.MarshalJSON()
if err != nil {
return err
}
manfile, err := os.Create(path.Join(tmpaci, aci.ManifestFile))
if err != nil {
return err
}
_, err = manfile.Write(manblob)
if err != nil {
return err
}
err = manfile.Close()
if err != nil {
return err
}
return nil
}