Fix for blendfile walker iterating over same paths twice

also fixes sha1 checks

packer/blendfile_path_walker.py

@@ -213,7 +213,8 @@ class FilePath:
                             if sub_block is not None:
                                 yield from block_expand(sub_block, sub_block.code)
                 else:
-                    yield block
+                    if code == b'ID':
+                        yield block
         else:
             expand_codes = None
 

packer/packer.py

@@ -156,9 +156,8 @@ def pack(blendfile_src, blendfile_dst, mode='FILE',
                     sha1.update(data)
                 return sha1.hexdigest()
 
-
         for src, dst in path_copy_files:
-            paths_uuid[os.path.relpath(dst, base_dir_dst).decode('utf-8')] = sha1_for_file(dst)
+            paths_uuid[os.path.relpath(dst, base_dir_dst).decode('utf-8')] = sha1_for_file(src)
         # XXX, better way to store temp target
         blendfile_dst_tmp = temp_remap_cb(blendfile_src, 0)
         paths_uuid[os.path.basename(blendfile_src).decode('utf-8')] = sha1_for_file(blendfile_dst_tmp)