Golang Charm.Config方法代码示例

// AddCharm adds the ch charm with curl to the state. bundleURL must
// be set to a URL where the bundle for ch may be downloaded from. On
// success the newly added charm state is returned.
func (st *State) AddCharm(ch charm.Charm, curl *charm.URL, bundleURL *url.URL, bundleSha256 string) (stch *Charm, err error) {
	// The charm may already exist in state as a placeholder, so we
	// check for that situation and update the existing charm record
	// if necessary, otherwise add a new record.
	var existing charmDoc
	err = st.charms.Find(bson.D{{"_id", curl.String()}, {"placeholder", true}}).One(&existing)
	if err == mgo.ErrNotFound {
		cdoc := &charmDoc{
			URL:          curl,
			Meta:         ch.Meta(),
			Config:       ch.Config(),
			Actions:      ch.Actions(),
			BundleURL:    bundleURL,
			BundleSha256: bundleSha256,
		}
		err = st.charms.Insert(cdoc)
		if err != nil {
			return nil, fmt.Errorf("cannot add charm %q: %v", curl, err)
		}
		return newCharm(st, cdoc)
	} else if err != nil {
		return nil, err
	}
	return st.updateCharmDoc(ch, curl, bundleURL, bundleSha256, stillPlaceholder)
}

func checkDummy(c *gc.C, f charm.Charm, path string) {
	c.Assert(f.Revision(), gc.Equals, 1)
	c.Assert(f.Meta().Name, gc.Equals, "dummy")
	c.Assert(f.Config().Options["title"].Default, gc.Equals, "My Title")
	c.Assert(f.Actions(), gc.DeepEquals,
		&charm.Actions{
			map[string]charm.ActionSpec{
				"snapshot": charm.ActionSpec{
					Description: "Take a snapshot of the database.",
					Params: map[string]interface{}{
						"outfile": map[string]interface{}{
							"description": "The file to write out to.",
							"type":        "string",
							"default":     "foo.bz2",
						}}}}})
	switch f := f.(type) {
	case *charm.Bundle:
		c.Assert(f.Path, gc.Equals, path)
	case *charm.Dir:
		c.Assert(f.Path, gc.Equals, path)
	}
}

// updateCharmDoc updates the charm with specified URL with the given
// data, and resets the placeholder and pendingupdate flags.  If the
// charm is no longer a placeholder or pending (depending on preReq),
// it returns ErrCharmRevisionAlreadyModified.
func (st *State) updateCharmDoc(
	ch charm.Charm, curl *charm.URL, bundleURL *url.URL, bundleSha256 string, preReq interface{}) (*Charm, error) {

	updateFields := bson.D{{"$set", bson.D{
		{"meta", ch.Meta()},
		{"config", ch.Config()},
		{"actions", ch.Actions()},
		{"bundleurl", bundleURL},
		{"bundlesha256", bundleSha256},
		{"pendingupload", false},
		{"placeholder", false},
	}}}
	ops := []txn.Op{{
		C:      st.charms.Name,
		Id:     curl,
		Assert: preReq,
		Update: updateFields,
	}}
	if err := st.runTransaction(ops); err != nil {
		return nil, onAbort(err, ErrCharmRevisionAlreadyModified)
	}
	return st.Charm(curl)
}