// CharmInfo retrieves the CharmInfo value for the charm at url.
func (s *Store) CharmInfo(url *charm.URL) (info *CharmInfo, err error) {
session := s.session.Copy()
defer session.Close()
log.Debugf("store: Retrieving charm info for %s", url)
rev := url.Revision
url = url.WithRevision(-1)
charms := session.Charms()
var cdoc charmDoc
var qdoc interface{}
if rev == -1 {
qdoc = bson.D{{"urls", url}}
} else {
qdoc = bson.D{{"urls", url}, {"revision", rev}}
}
err = charms.Find(qdoc).Sort("-revision").One(&cdoc)
if err != nil {
log.Errorf("store: Failed to find charm %s: %v", url, err)
return nil, ErrNotFound
}
info = &CharmInfo{
cdoc.Revision,
cdoc.Digest,
cdoc.Sha256,
cdoc.Size,
cdoc.FileId,
cdoc.Meta,
cdoc.Config,
}
return info, nil
}
// PutCharm uploads the given charm to provider storage, and adds a
// state.Charm to the state. The charm is not uploaded if a charm with
// the same URL already exists in the state.
// If bumpRevision is true, the charm must be a local directory,
// and the revision number will be incremented before pushing.
func (conn *Conn) PutCharm(curl *charm.URL, repo charm.Repository, bumpRevision bool) (*state.Charm, error) {
if curl.Revision == -1 {
rev, err := repo.Latest(curl)
if err != nil {
return nil, fmt.Errorf("cannot get latest charm revision: %v", err)
}
curl = curl.WithRevision(rev)
}
ch, err := repo.Get(curl)
if err != nil {
return nil, fmt.Errorf("cannot get charm: %v", err)
}
if bumpRevision {
chd, ok := ch.(*charm.Dir)
if !ok {
return nil, fmt.Errorf("cannot increment revision of charm %q: not a directory", curl)
}
if err = chd.SetDiskRevision(chd.Revision() + 1); err != nil {
return nil, fmt.Errorf("cannot increment revision of charm %q: %v", curl, err)
}
curl = curl.WithRevision(chd.Revision())
}
if sch, err := conn.State.Charm(curl); err == nil {
return sch, nil
}
return conn.addCharm(curl, ch)
}
// DeleteCharm deletes the charms matching url. If no revision is specified,
// all revisions of the charm are deleted.
func (s *Store) DeleteCharm(url *charm.URL) ([]*CharmInfo, error) {
logger.Debugf("deleting charm %s", url)
infos, err := s.getRevisions(url, 0)
if err != nil {
return nil, err
}
if len(infos) == 0 {
return nil, ErrNotFound
}
session := s.session.Copy()
defer session.Close()
var deleted []*CharmInfo
for _, info := range infos {
err := session.Charms().Remove(
bson.D{{"urls", url.WithRevision(-1)}, {"revision", info.Revision()}})
if err != nil {
logger.Errorf("failed to delete metadata for charm %s: %v", url, err)
return deleted, err
}
err = session.CharmFS().RemoveId(info.fileId)
if err != nil {
logger.Errorf("failed to delete GridFS file for charm %s: %v", url, err)
return deleted, err
}
deleted = append(deleted, info)
}
return deleted, err
}
// Latest implements charm.Repository.Latest.
func (s *MockCharmStore) Latest(charmURL *charm.URL) (int, error) {
charmURL = charmURL.WithRevision(-1)
base, rev := s.interpret(charmURL)
if _, found := s.charms[base][rev]; !found {
return 0, fmt.Errorf("charm not found in mock store: %s", charmURL)
}
return rev, nil
}
func (conn *Conn) addCharm(curl *charm.URL, ch charm.Charm) (*state.Charm, error) {
var f *os.File
name := charm.Quote(curl.String())
switch ch := ch.(type) {
case *charm.Dir:
var err error
if f, err = ioutil.TempFile("", name); err != nil {
return nil, err
}
defer os.Remove(f.Name())
defer f.Close()
err = ch.BundleTo(f)
if err != nil {
return nil, fmt.Errorf("cannot bundle charm: %v", err)
}
if _, err := f.Seek(0, 0); err != nil {
return nil, err
}
case *charm.Bundle:
var err error
if f, err = os.Open(ch.Path); err != nil {
return nil, fmt.Errorf("cannot read charm bundle: %v", err)
}
defer f.Close()
default:
return nil, fmt.Errorf("unknown charm type %T", ch)
}
h := sha256.New()
size, err := io.Copy(h, f)
if err != nil {
return nil, err
}
digest := hex.EncodeToString(h.Sum(nil))
if _, err := f.Seek(0, 0); err != nil {
return nil, err
}
storage := conn.Environ.Storage()
log.Infof("writing charm to storage [%d bytes]", size)
if err := storage.Put(name, f, size); err != nil {
return nil, fmt.Errorf("cannot put charm: %v", err)
}
ustr, err := storage.URL(name)
if err != nil {
return nil, fmt.Errorf("cannot get storage URL for charm: %v", err)
}
u, err := url.Parse(ustr)
if err != nil {
return nil, fmt.Errorf("cannot parse storage URL: %v", err)
}
log.Infof("adding charm to state")
sch, err := conn.State.AddCharm(ch, curl, u, digest)
if err != nil {
return nil, fmt.Errorf("cannot add charm: %v", err)
}
return sch, nil
}
// interpret extracts from charmURL information relevant to both Latest and
// Get. The returned "base" is always the string representation of the
// unrevisioned part of charmURL; the "rev" wil be taken from the charmURL if
// available, and will otherwise be the revision of the latest charm in the
// store with the same "base".
func (s *MockCharmStore) interpret(charmURL *charm.URL) (base string, rev int) {
base, rev = charmURL.WithRevision(-1).String(), charmURL.Revision
if rev == -1 {
for candidate := range s.charms[base] {
if candidate > rev {
rev = candidate
}
}
}
return
}
func handleEvent(ctx *cmd.Context, curl *charm.URL, event *charm.EventResponse) error {
switch event.Kind {
case "published":
curlRev := curl.WithRevision(event.Revision)
log.Infof("charm published at %s as %s", event.Time, curlRev)
fmt.Fprintln(ctx.Stdout, curlRev)
case "publish-error":
return fmt.Errorf("charm could not be published: %s", strings.Join(event.Errors, "; "))
default:
return fmt.Errorf("unknown event kind %q for charm %s", event.Kind, curl)
}
return nil
}
// SetCharm adds and removes charms in s. The affected charm is identified by
// charmURL, which must be revisioned. If bundle is nil, the charm will be
// removed; otherwise, it will be stored. It is an error to store a bundle
// under a charmURL that does not share its name and revision.
func (s *MockCharmStore) SetCharm(charmURL *charm.URL, bundle *charm.Bundle) error {
base := charmURL.WithRevision(-1).String()
if charmURL.Revision < 0 {
return fmt.Errorf("bad charm url revision")
}
if bundle == nil {
delete(s.charms[base], charmURL.Revision)
return nil
}
bundleRev := bundle.Revision()
bundleName := bundle.Meta().Name
if bundleName != charmURL.Name || bundleRev != charmURL.Revision {
return fmt.Errorf("charm url %s mismatch with bundle %s-%d", charmURL, bundleName, bundleRev)
}
if _, found := s.charms[base]; !found {
s.charms[base] = map[int]*charm.Bundle{}
}
s.charms[base][charmURL.Revision] = bundle
return nil
}
// getRevisions returns at most the last n revisions for charm at url,
// in descending revision order. For limit n=0, all revisions are returned.
func (s *Store) getRevisions(url *charm.URL, n int) ([]*CharmInfo, error) {
session := s.session.Copy()
defer session.Close()
logger.Debugf("retrieving charm info for %s", url)
rev := url.Revision
url = url.WithRevision(-1)
charms := session.Charms()
var cdocs []charmDoc
var qdoc interface{}
if rev == -1 {
qdoc = bson.D{{"urls", url}}
} else {
qdoc = bson.D{{"urls", url}, {"revision", rev}}
}
q := charms.Find(qdoc).Sort("-revision")
if n > 0 {
q = q.Limit(n)
}
if err := q.All(&cdocs); err != nil {
logger.Errorf("failed to find charm %s: %v", url, err)
return nil, ErrNotFound
}
var infos []*CharmInfo
for _, cdoc := range cdocs {
infos = append(infos, &CharmInfo{
cdoc.Revision,
cdoc.Digest,
cdoc.Sha256,
cdoc.Size,
cdoc.FileId,
cdoc.Meta,
cdoc.Config,
})
}
return infos, nil
}
func (s *LocalRepoSuite) checkNotFoundErr(c *C, err error, charmURL *charm.URL) {
expect := `charm not found in "` + s.repo.Path + `": ` + charmURL.String()
c.Check(err, ErrorMatches, expect)
}
// Run connects to the specified environment and starts the charm
// upgrade process.
func (c *UpgradeCharmCommand) Run(ctx *cmd.Context) error {
conn, err := juju.NewConnFromName(c.EnvName)
if err != nil {
return err
}
defer conn.Close()
service, err := conn.State.Service(c.ServiceName)
if err != nil {
return err
}
oldURL, _ := service.CharmURL()
var newURL *charm.URL
if c.SwitchURL != "" {
// A new charm URL was explicitly specified.
conf, err := conn.State.EnvironConfig()
if err != nil {
return err
}
newURL, err = charm.InferURL(c.SwitchURL, conf.DefaultSeries())
if err != nil {
return err
}
} else {
// No new URL specified, but revision might have been.
newURL = oldURL.WithRevision(c.Revision)
}
repo, err := charm.InferRepository(newURL, ctx.AbsPath(c.RepoPath))
if err != nil {
return err
}
// If no explicit revision was set with either SwitchURL
// or Revision flags, discover the latest.
explicitRevision := true
if newURL.Revision == -1 {
explicitRevision = false
latest, err := repo.Latest(newURL)
if err != nil {
return err
}
newURL = newURL.WithRevision(latest)
}
bumpRevision := false
if *newURL == *oldURL {
if explicitRevision {
return fmt.Errorf("already running specified charm %q", newURL)
}
// Only try bumping the revision when necessary (local dir charm).
if _, isLocal := repo.(*charm.LocalRepository); !isLocal {
// TODO(dimitern): If the --force flag is set to something
// different to before, we might actually want to allow this
// case (and the other error below). LP bug #1174287
return fmt.Errorf("already running latest charm %q", newURL)
}
// This is a local repository.
if ch, err := repo.Get(newURL); err != nil {
return err
} else if _, bumpRevision = ch.(*charm.Dir); !bumpRevision {
// Only bump the revision when it's a directory.
return fmt.Errorf("cannot increment revision of charm %q: not a directory", newURL)
}
}
sch, err := conn.PutCharm(newURL, repo, bumpRevision)
if err != nil {
return err
}
return service.SetCharm(sch, c.Force)
}
// WriteCharmURL writes a charm identity file into the directory.
func WriteCharmURL(d *GitDir, url *charm.URL) error {
return utils.WriteYaml(filepath.Join(d.path, ".juju-charm"), url.String())
}