Updated help text

README.rst

@@ -31,6 +31,30 @@ To extract all non SYS files while converting to lower case, use::
     File #8 : *ASTEROIDS    066 : copying to asteroid.s
 
 
+Command Line Help
+-----------------
+
+The built-in help in accessed with the standard ``--help`` argument::
+
+    $ python atrcopy.py --help
+    usage: atrcopy.py [-h] [-v] [-l] [--dry-run] [-n] [-x] [--xex] ATR [ATR ...]
+
+    Extract images off ATR format disks
+
+    positional arguments:
+      ATR            an ATR image file [or a list of them]
+
+    optional arguments:
+      -h, --help     show this help message and exit
+      -v, --verbose
+      -l, --lower    convert filenames to lower case
+      --dry-run      don't extract, just show what would have been extracted
+      -n, --no-sys   only extract things that look like games (no DOS or .SYS
+                     files)
+      -x, --extract  extract files
+      --xex          add .xex extension
+
+
 Example on Mac OS X
 -------------------
 

atrcopy.py

@@ -235,14 +235,15 @@ if __name__ == "__main__":
     
     parser = argparse.ArgumentParser(description="Extract images off ATR format disks")
     parser.add_argument("-v", "--verbose", default=0, action="count")
-    parser.add_argument("-l", "--lower", action="store_true", default=False, help="Convert filenames to lower case")
-    parser.add_argument("--dry-run", action="store_true", default=False, help="Don't extract, just show what would have been extracted")
-    parser.add_argument("-n", "--no-sys", action="store_true", default=False, help="Only extract things that look like games (no DOS or .SYS files)")
-    parser.add_argument("-x", "--extract", action="store_true", default=False, help="Extract files")
-    parser.add_argument("--xex", action="store_true", default=False, help="Add .xex extension")
+    parser.add_argument("-l", "--lower", action="store_true", default=False, help="convert filenames to lower case")
+    parser.add_argument("--dry-run", action="store_true", default=False, help="don't extract, just show what would have been extracted")
+    parser.add_argument("-n", "--no-sys", action="store_true", default=False, help="only extract things that look like games (no DOS or .SYS files)")
+    parser.add_argument("-x", "--extract", action="store_true", default=False, help="extract files")
+    parser.add_argument("--xex", action="store_true", default=False, help="add .xex extension")
+    parser.add_argument("files", metavar="ATR", nargs="+", help="an ATR image file [or a list of them]")
     options, extra_args = parser.parse_known_args()
 
-    for args in extra_args:
+    for args in options.files:
         print args
         with open(args, "rb") as fh:
             atr = AtrDiskImage(fh)