do not abort on migrations which are not on the disk

CHANGELOG.rst

@@ -2,6 +2,11 @@
  Nomad Changelog
 =================
 
+1.11
+----
+
+ - Do not abort on migrations not on disk
+
 1.10
 ----
 

nomad/__init__.py

@@ -11,7 +11,7 @@
 from nomad.utils import abort, NomadError, NomadIniNotFound
 
 
-__version__ = '1.10'
+__version__ = '1.11'
 
 
 GLOBAL = [
@@ -63,8 +63,12 @@ def list_(all=('a', False, 'show all migrations (default: only non-applied)'),
     '''List migrations
     '''
     repo = opts['repo']
-    for m in repo.available:
-        if m in repo.applied:
+    all_migrations = repo.available + [m for m in repo.applied
+                                       if m not in repo.available]
+    for m in all_migrations:
+        if m not in repo.available:
+            print colored(m, 'red') + ' (not on disk)'
+        elif m in repo.applied:
             if all:
                 cprint(m, 'magenta')
         else:

nomad/repo.py

@@ -107,13 +107,9 @@ def __new__(cls, repo, name, **kwargs):
             cls.SINGLETONS[key] = object.__new__(cls)
         return cls.SINGLETONS[key]
 
-    def __init__(self, repo, name, force=False, applied=False):
+    def __init__(self, repo, name, applied=False):
         self.repo = repo
         self.name = name
-        if not op.exists(op.join(repo.path, name)) and not force:
-            raise NomadError(
-                'migration exists in database, but not found on the disk: %s'
-                % name)
         self.conf = ConfigParser(
             interpolation=ExtendedInterpolation(),
             defaults={
@@ -124,7 +120,9 @@ def __init__(self, repo, name, force=False, applied=False):
         self.conf.read([op.join(repo.path, name, 'migration.ini')])
         deps = self.conf.get('nomad', 'dependencies', fallback='').split(',')
         self._deps = [x.strip() for x in deps if x.strip()]
+
         self.applied = applied
+        self.exists = op.exists(op.join(repo.path, name))
 
     def __repr__(self):
         return '<%s: %s>' % (type(self).__name__, str(self))