Port everything to using Treeish objects instead of (repo, ref).

This affects pretty much every part of morph, so this might not be fully
working and stable yet.

This commit also introduces the "update-gits" command that can be used
to update all cached repositories from the list of base URLs. The tree
walk when resolving the Treeish objects in Builder.get_cache_id() is a
bit similar to what we do in BuildDependencyGraph, maybe we can merge
that one day.

1 files changed, 15 insertions, 0 deletions

diff --git a/morphlib/blobs.py b/morphlib/blobs.py
index 1732f000..d02643a6 100644
--- a/morphlib/blobs.py
+++ b/morphlib/blobs.py
@@ -14,8 +14,23 @@
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 
+import os
+
+
 class Blob(object):
 
+    @staticmethod
+    def create_blob(morph):
+        if morph.kind == 'stratum':
+            return Stratum(morph)
+        elif morph.kind == 'chunk':
+            return Chunk(morph)
+        elif morph.kind == 'system':
+            return System(morph)
+        else:
+            raise TypeError('Morphology %s has an unknown type: %s' % 
+                            (morph.filename, morph.kind))
+
     def __init__(self, morph):
         self.parents = []
         self.morph = morph