update command for updating repository format

papers/commands/__init__.py

@@ -10,3 +10,4 @@ import remove_cmd
 import websearch_cmd
 import tags_cmd
 import attach_cmd
+import update_cmd

papers/commands/update_cmd.py

@@ -0,0 +1,19 @@
+from .. import repo
+from .. import color
+
+def parser(subparsers, config):
+    parser = subparsers.add_parser('update', help='update the repository to the lastest format')
+    return parser
+
+
+def command(config, ui):
+    rp = repo.Repository.from_directory(config)
+    msg = ("You should backup the paper directory {} before continuing."
+           "Continue ?").format(color.dye(rp.papersdir, color.filepath))
+    sure = ui.input_yn(question=msg, default='n')
+    if sure:
+        for p in rp.all_papers():
+            tags = set(p.metadata['tags'])
+            tags = tags.union(p.metadata['labels'])
+            p.metadata.pop('labels', [])
+            rp.save_paper(p)

papers/papers

@@ -22,6 +22,7 @@ cmds = collections.OrderedDict([
         ('websearch', commands.websearch_cmd),
         ('tags', commands.tags_cmd),
         ('attach', commands.attach_cmd),
+        ('update', commands.update_cmd),
         ])
 
 config = configs.read_config()