argparse type is a nice type saver for simple data types, but it doesn't
look a good fit for the input XML file:
- Certain implementations of argparse (particularly python 2.7.3's)
invoke the type constructor for the default argument even when an
option is passed in the command line. Causing `No such file or
directory: 'gl_API.xml'` when the current dir is not
src/mapi/glapi/gen.
- The parser takes multiple arguments. This is currently worked around
using lambdas, but that unnecessarily complex and hard to read.
Furthermore it's odd to have a side-effect as heavy as parsing XML
happening deep inside the argument parsing.
https://bugs.freedesktop.org/show_bug.cgi?id=90600
Reviewed-by: Brian Paul <brianp@vmware.com>
Jose Fonseca
b787f48ed2