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Having to specify -f is a little bit ugly when a URI is distinctive
enough to recognise amongst the other positional parameters, so take it
as an optional positional parameter. -f/--fetch is still supported, but
deprecated.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Python's argparse module can't handle when several optional positional
arguments (set with nargs='?') are intermixed with other options. If the
positional arguments aren't optional then this isn't an issue; thus when
changing positional arguments to optional (as we are doing with devtool)
we need this workaround.
This is a pretty horrible hack, but we don't want this flexibility of
ordering to disappear simply because we made some arguments optional.
Unfortunately the corresponding bug remains unresolved upstream even in
Python 3, and argparse is not really designed to be subclassed so it
doesn't make things like this easy.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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For scripts that use Python's standard argparse module to parse
command-line arguments, create a subclass which will show the usage
the usage information when a command-line parsing error occurs. The most
common case would be when the script is run with no arguments; at least
then the user immediately gets to see what arguments they might need to
pass instead of just an error message.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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