jujud: add primordial provisioning agent

state/state.go

 // The state package enables reading, observing, and changing
 // the state stored in ZooKeeper of a whole environment
 // managed by juju.
 package state
 
 import (
         "fmt"
         "launchpad.net/goyaml"
         "launchpad.net/gozk/zookeeper"
         "launchpad.net/juju/go/charm"
@@ skipping 85 matching lines @@
         for _, key := range topology.MachineKeys() {
                 machines = append(machines, &Machine{s, key})
         }
         return machines, nil
 }
 
 // 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 (s *State) AddCharm(ch charm.Charm, curl *charm.URL, bundleURL *url.URL) (*Charm, error) {
+func (s *State) AddCharm(ch charm.Charm, curl *charm.URL, bundleURL *url.URL, bundleSha256 string) (*Charm, error) {
         data := &charmData{
-                Meta:      ch.Meta(),
-                Config:    ch.Config(),
-                BundleURL: bundleURL.String(),
+                Meta:         ch.Meta(),
+                Config:       ch.Config(),
+                BundleURL:    bundleURL.String(),
+                BundleSha256: bundleSha256,
         }
         yaml, err := goyaml.Marshal(data)
         if err != nil {
                 return nil, err
         }
         path, err := charmPath(curl)
         if err != nil {
                 return nil, err
         }
         _, err = s.zk.Create(path, string(yaml), 0, zkPermAll)
@@ skipping 120 matching lines @@
         serviceName, _, err := parseUnitName(name)
         if err != nil {
                 return nil, err
         }
         service, err := s.Service(serviceName)
         if err != nil {
                 return nil, err
         }
         return service.Unit(name)
 }
+
+// Environment returns the *ConfigNode representing this environments
+// configuration
+func (s *State) Environment() *ConfigNode {
+        return newConfigNode(s.zk, zkEnvironmentPath)
+}·······