config/module: determine storage folder by path

config/module/folder_storage.go

@@ -39,8 +39,8 @@ func (s *FolderStorage) Dir(source string) (d string, e bool, err error) {
 }
 
 // Get implements Storage.Get
-func (s *FolderStorage) Get(source string, update bool) error {
-	dir := s.dir(source)
+func (s *FolderStorage) Get(key string, source string, update bool) error {
+	dir := s.dir(key)
 	if !update {
 		if _, err := os.Stat(dir); err == nil {
 			// If the directory already exists, then we're done since

config/module/folder_storage_test.go

@@ -24,14 +24,16 @@ func TestFolderStorage(t *testing.T) {
 		t.Fatal("should not exist")
 	}
 
+	key := "foo"
+
 	// We can get it
-	err = s.Get(module, false)
+	err = s.Get(key, module, false)
 	if err != nil {
 		t.Fatalf("err: %s", err)
 	}
 
 	// Now the module exists
-	dir, ok, err := s.Dir(module)
+	dir, ok, err := s.Dir(key)
 	if err != nil {
 		t.Fatalf("err: %s", err)
 	}

config/module/storage.go

@@ -9,17 +9,17 @@ type Storage interface {
 	Dir(string) (string, bool, error)
 
 	// Get will download and optionally update the given module.
-	Get(string, bool) error
+	Get(string, string, bool) error
 }
 
-func getStorage(s Storage, src string, mode GetMode) (string, bool, error) {
+func getStorage(s Storage, key string, src string, mode GetMode) (string, bool, error) {
 	// Get the module with the level specified if we were told to.
 	if mode > GetModeNone {
-		if err := s.Get(src, mode == GetModeUpdate); err != nil {
+		if err := s.Get(key, src, mode == GetModeUpdate); err != nil {
 			return "", false, err
 		}
 	}
 
 	// Get the directory where the module is.
-	return s.Dir(src)
+	return s.Dir(key)
 }

config/module/tree.go

@@ -153,6 +153,11 @@ func (t *Tree) Load(s Storage, mode GetMode) error {
 				"module %s: duplicated. module names must be unique", m.Name)
 		}
 
+		// Determine the path to this child
+		path := make([]string, len(t.path), len(t.path)+1)
+		copy(path, t.path)
+		path = append(path, m.Name)
+
 		// Split out the subdir if we have one
 		source, subDir := getDirSubdir(m.Source)
 
@@ -168,7 +173,9 @@ func (t *Tree) Load(s Storage, mode GetMode) error {
 		}
 
 		// Get the directory where this module is so we can load it
-		dir, ok, err := getStorage(s, source, mode)
+		key := strings.Join(path, ".")
+		key = "root." + key
+		dir, ok, err := getStorage(s, key, source, mode)
 		if err != nil {
 			return err
 		}
@@ -190,9 +197,7 @@ func (t *Tree) Load(s Storage, mode GetMode) error {
 		}
 
 		// Set the path of this child
-		path := make([]string, len(t.path), len(t.path)+1)
-		copy(path, t.path)
-		children[m.Name].path = append(path, m.Name)
+		children[m.Name].path = path
 	}
 
 	// Go through all the children and load them.