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/oe-pkgdata-util b/scripts/oe-pkgdata-util
index afdceaae29..8e22e020e7 100755
--- a/scripts/oe-pkgdata-util
+++ b/scripts/oe-pkgdata-util
@@ -33,6 +33,7 @@ scripts_path = os.path.dirname(os.path.realpath(__file__))
 lib_path = scripts_path + '/lib'
 sys.path = sys.path + [lib_path]
 import scriptutils
+import argparse_oe
 logger = scriptutils.logger_create('pkgdatautil')
 
 def tinfoil_init():
@@ -417,8 +418,8 @@ def find_path(args):
 
 
 def main():
-    parser = argparse.ArgumentParser(description="OpenEmbedded pkgdata tool - queries the pkgdata files written out during do_package",
-                                     epilog="Use %(prog)s <subcommand> --help to get help on a specific command")
+    parser = argparse_oe.ArgumentParser(description="OpenEmbedded pkgdata tool - queries the pkgdata files written out during do_package",
+                                        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('-p', '--pkgdata-dir', help='Path to pkgdata directory (determined automatically if not specified)')
     subparsers = parser.add_subparsers(title='subcommands', metavar='<subcommand>')