Improve cli code

logya/main.py

@@ -3,40 +3,34 @@
 import argparse
 
 from logya import __version__
-from logya.create import Create
+from logya.create import create
 from logya.generate import generate
 from logya.server import serve
 
 
-def create(args):
-    Create(args.name, site=args.site)
-
-
 def main():
-    parser = argparse.ArgumentParser(description='Logya a static Web site generator.')
-    parser.add_argument('--version', '-V', action='version', version=__version__)
-    parser.add_argument('--verbose', '-v', action='store_true', help='Print log messages during execution.')
+    parent = argparse.ArgumentParser(add_help=False)
+    parent.add_argument('--version', '-V', action='version', version=__version__)
+    parent.add_argument('--verbose', '-v', action='store_true', help='Print info messages during execution.')
+    parent.add_argument('--dir_site', '-d', help='Path to Web site directory, absolute or relative to current working directory.')
 
+    parser = argparse.ArgumentParser(description='Logya a static Web site generator.')
     subparsers = parser.add_subparsers()
 
     # create a basic site with the given name
-    p_create = subparsers.add_parser('create', help='Create a starter Web site in the specified directory.')
+    p_create = subparsers.add_parser('create', parents=[parent], help='Create a starter Web site in the specified directory.')
     p_create.add_argument('name', help='name of the directory to create.')
     p_create.set_defaults(func=create)
     p_create.add_argument('--site', '-s', default='starter', help='Name one of the available sites.')
 
     # generate a site in public directory, generate and gen sub commands do the same
-    hlp = 'Generate Web site to public from current directory.'
-    hlp_dir_site = ('Path to Web site directory, absolute or relative to current working directory.')
-    hlp_keep = ('Keep existing `public` directory, by default it is removed.')
-    for command in ['generate', 'gen']:
-        p_gen = subparsers.add_parser(command, help=hlp)
-        p_gen.set_defaults(func=generate)
-        p_gen.add_argument('--dir_site', '-d', help=hlp_dir_site)
-        p_gen.add_argument('--keep', '-k', action='store_true', default=False, help=hlp_keep)
+    p_generate = subparsers.add_parser('generate', aliases=('gen',), parents=[parent], help='Generate site in public directory.')
+    p_generate.set_defaults(func=generate)
+    hlp_keep = 'Keep existing `public` directory, by default it is removed.'
+    p_generate.add_argument('--keep', '-k', action='store_true', default=False, help=hlp_keep)
 
     # serve static pages
-    p_serve = subparsers.add_parser('serve', help='Serve static pages from public directory.')
+    p_serve = subparsers.add_parser('serve', parents=[parent], help='Serve static pages from public directory.')
     p_serve.set_defaults(func=serve)
     p_serve.add_argument('--host', '-a', default='localhost', help='server host name or IP')
     p_serve.add_argument('--port', '-p', default=8080, type=int, help='server port to listen')