Adds tags command to list tags.

papers/commands/__init__.py

@@ -8,3 +8,4 @@ import open_cmd
 import edit_cmd
 import remove_cmd
 import websearch_cmd
+import tags_cmd

papers/papers

@@ -19,7 +19,8 @@ cmds = collections.OrderedDict([
         ('edit', commands.edit_cmd),
         ('remove', commands.remove_cmd),
         ('open', commands.open_cmd),
-        ('websearch', commands.websearch_cmd)
+        ('websearch', commands.websearch_cmd),
+        ('tags', commands.tags_cmd),
         ])
 
 config = configs.read_config()

papers/repo.py

@@ -174,7 +174,8 @@ class Repository(object):
 
     def get_document_directory(self):
         if self.config.has_option(configs.MAIN_SECTION, 'document-directory'):
-            doc_dir = self.config.get(configs.MAIN_SECTION, 'document-directory')
+            doc_dir = self.config.get(configs.MAIN_SECTION,
+                                      'document-directory')
         else:
             doc_dir = os.path.join(self.papersdir, DOC_DIR)
         return files.clean_path(doc_dir)
@@ -203,6 +204,12 @@ class Repository(object):
             new_doc_file = os.path.join(doc_path, citekey + ext)
             shutil.copy(doc_file, new_doc_file)
 
+    def get_labels(self):
+        labels = set()
+        for p in self.all_papers():
+            labels = labels.union(p.metadata.get('labels', []))
+        return labels
+
     @classmethod
     def from_directory(cls, config, papersdir=None):
         repo = cls(config=config)