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path: root/scripts/lib/argparse_oe.py
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2015-12-22devtool: add: allow specifying URL as positional argumentPaul Eggleton
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>
2015-12-22scripts/lib/argparse_oe: handle intermixing of optional positional argumentsPaul Eggleton
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>
2015-12-22scripts: print usage in argparse-using scripts when a command-line error occursPaul Eggleton
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>