Allow invalid configuration files to be edited

beets/ui/__init__.py

@@ -920,6 +920,13 @@ def _raw_main(args, lib=None):
                       help=optparse.SUPPRESS_HELP)
 
     options, subargs = parser.parse_global_options(args)
+
+    # Bypass _setup so that an invalid configuration does not prevent
+    # the editor from starting.
+    if subargs[0] == 'config' and ('-e' in subargs or '--edit' in subargs):
+        from beets.ui.commands import config_edit
+        return config_edit()
+
     subcommands, plugins, lib = _setup(options, lib)
     parser.add_subcommand(*subcommands)
 

beets/ui/commands.py

@@ -1485,32 +1485,38 @@ def config_func(lib, opts, args):
 
     # Open in editor.
     elif opts.edit:
-        path = config.user_config_path()
-
-        if 'EDITOR' in os.environ:
-            editor = os.environ['EDITOR']
-            args = [editor, editor, path]
-        elif platform.system() == 'Darwin':
-            args = ['open', 'open', '-n', path]
-        elif platform.system() == 'Windows':
-            # On windows we can execute arbitrary files. The os will
-            # take care of starting an appropriate application
-            args = [path, path]
-        else:
-            # Assume Unix
-            args = ['xdg-open', 'xdg-open', path]
-
-        try:
-            os.execlp(*args)
-        except OSError:
-            raise ui.UserError("Could not edit configuration. Please"
-                               "set the EDITOR environment variable.")
+        config_edit()
 
     # Dump configuration.
     else:
         print(config.dump(full=opts.defaults))
 
 
+def config_edit():
+    """Open a program to edit the user configuration.
+    """
+    path = config.user_config_path()
+
+    if 'EDITOR' in os.environ:
+        editor = os.environ['EDITOR']
+        args = [editor, editor, path]
+    elif platform.system() == 'Darwin':
+        args = ['open', 'open', '-n', path]
+    elif platform.system() == 'Windows':
+        # On windows we can execute arbitrary files. The os will
+        # take care of starting an appropriate application
+        args = [path, path]
+    else:
+        # Assume Unix
+        args = ['xdg-open', 'xdg-open', path]
+
+    try:
+        os.execlp(*args)
+    except OSError:
+        raise ui.UserError("Could not edit configuration. Please"
+                           "set the EDITOR environment variable.")
+
+
 config_cmd = ui.Subcommand('config',
                            help='show or edit the user configuration')
 config_cmd.parser.add_option(

test/test_config_command.py

@@ -10,6 +10,7 @@
 import _common
 from _common import unittest
 from helper import TestHelper, capture_stdout
+from beets.library import Library
 
 
 class ConfigCommandTest(unittest.TestCase, TestHelper):
@@ -105,6 +106,19 @@ def test_config_editor_not_found(self):
         self.assertIn('Could not edit configuration',
                       str(user_error.exception.args[0]))
 
+    def test_edit_invalid_config_file(self):
+        self.lib = Library(':memory:')
+        with open(self.config_path, 'w') as file:
+            file.write('invalid: [')
+        config.clear()
+        config._materialized = False
+
+        os.environ['EDITOR'] = 'myeditor'
+        with patch('os.execlp') as execlp:
+            self.run_command('config', '-e')
+        execlp.assert_called_once_with(
+            'myeditor', 'myeditor', self.config_path)
+
 
 def suite():
     return unittest.TestLoader().loadTestsFromName(__name__)