added minimal create.py

bob/db/fargo/create.py

+#!/usr/bin/env python
+# vim: set fileencoding=utf-8 :
+
+import os
+from .models import *
+
+import bob.core
+logger = bob.core.log.setup('bob.db.fargo')
+
+
+def add_clients(session, imagesdir, verbose=True):
+  """Add clients
+
+  This function add clients to the database. 
+
+  Parameters
+  ----------
+  imagesdir : :py:obj:str
+    The directory where the images have been extracted
+  verbose : bool
+    Print some information
+
+  """
+  if verbose: 
+    logger.info("Adding clients ...")
+    for d in os.listdir(imagesdir):
+      print(d)
+
+
+def create_tables(args):
+    """Creates all necessary tables (only to be used at the first time)"""
+
+    from bob.db.base.utils import create_engine_try_nolock
+    engine = create_engine_try_nolock(args.type, args.files[0], echo=(args.verbose > 2))
+    Base.metadata.create_all(engine)
+
+
+# Driver API
+# ==========
+
+def create(args):
+  """Creates or re-creates this database"""
+
+  from bob.db.base.utils import session_try_nolock
+
+  dbfile = args.files[0]
+
+  if args.recreate:
+    if args.verbose and os.path.exists(dbfile):
+      print(('unlinking %s...' % dbfile))
+    if os.path.exists(dbfile):
+      os.unlink(dbfile)
+
+  if not os.path.exists(os.path.dirname(dbfile)):
+    os.makedirs(os.path.dirname(dbfile))
+
+  # the real work...
+  create_tables(args)
+  s = session_try_nolock(args.type, args.files[0], echo=(args.verbose >= 2))
+  add_clients(s, args.imagesdir, args.verbose)
+  s.commit()
+  s.close()
+
+  return 0
+
+
+def add_command(subparsers):
+  """Add specific subcommands that the action "create" can use"""
+
+  parser = subparsers.add_parser('create', help=create.__doc__)
+
+  parser.add_argument('-R', '--recreate', action='store_true', default=False,
+                      help="If set, I'll first erase the current database")
+  parser.add_argument('-v', '--verbose', action='count', default=0,
+                      help="Do SQL operations in a verbose way")
+  parser.add_argument('-i', '--imagesdir', action='store',
+                      default='/idiap/temp/heusch/bob.project.fargo/images/'
+                      metavar='DIR',
+                      help="Change the path to the extracted images of the FARGO database (defaults to %(default)s)")
+
+  parser.set_defaults(func=create)  # action