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scripts: print usage in argparse-using scripts when a command-line error occurs

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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.

(From OE-Core rev: d62fe7c9bc2df6a4464440a3cae0539074bf99aa)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Eggleton
2015-12-22 17:02:54 +13:00
committed by Richard Purdie
parent 548d4332e8
commit 8e0a84c901
10 changed files with 38 additions and 15 deletions
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5
scripts/contrib/devtool-stress.py
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@@ -35,6 +35,7 @@ import fnmatch
scripts_lib_path = os.path.abspath(os.path.join(os.path.dirname(os.path.realpath(__file__)), '..', 'lib'))
sys.path.insert(0, scripts_lib_path)
import scriptutils
import argparse_oe
logger = scriptutils.logger_create('devtool-stress')
def select_recipes(args):
@@ -204,8 +205,8 @@ def stress_modify(args):
def main():
parser = argparse.ArgumentParser(description="devtool stress tester",
epilog="Use %(prog)s <subcommand> --help to get help on a specific command")
parser = argparse_oe.ArgumentParser(description="devtool stress tester",
epilog="Use %(prog)s <subcommand> --help to get help on a specific command")
parser.add_argument('-d', '--debug', help='Enable debug output', action='store_true')
parser.add_argument('-r', '--resume-from', help='Resume from specified recipe', metavar='PN')
parser.add_argument('-o', '--only', help='Only test specified recipes (comma-separated without spaces, wildcards allowed)', metavar='PNLIST')