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

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>

1 files changed, 3 insertions, 2 deletions

diff --git a/scripts/contrib/devtool-stress.py b/scripts/contrib/devtool-stress.py
index 4b35fc9d0e..8cf92ca2fe 100755
--- a/scripts/contrib/devtool-stress.py
+++ b/scripts/contrib/devtool-stress.py
@@ -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')