wic: beautify 'wic help'

The Wic help returned to the user is unreadable.

Use a custom ArgumentParser to override argparse help message.

change help message as suggest in
https://bugzilla.yoctoproject.org/show_bug.cgi?id=12205
[YOCTO #12205]

changes applies to 'wic help', 'wic -h', 'wic --h' and 'wic --help'

(From OE-Core rev: d29d553cc096f4e1208c44dc595e1cf365c3dff3)

Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/scripts/wic b/scripts/wic
index 1d89fb2eda..1a717300f5 100755
--- a/scripts/wic
+++ b/scripts/wic
@@ -495,14 +495,18 @@ def init_parser(parser):
         subparser = subparsers.add_parser(subcmd, help=subcommands[subcmd][2])
         subcommands[subcmd][3](subparser)
 
+class WicArgumentParser(argparse.ArgumentParser):
+     def format_help(self):
+         return hlp.wic_help
 
 def main(argv):
-    parser = argparse.ArgumentParser(
+    parser = WicArgumentParser(
         description="wic version %s" % __version__)
 
     init_parser(parser)
 
     args = parser.parse_args(argv)
+
     if args.debug:
         logger.setLevel(logging.DEBUG)
 
@@ -510,8 +514,6 @@ def main(argv):
         if args.command == "help":
             if args.help_topic is None:
                 parser.print_help()
-                print()
-                print("Please specify a help topic")
             elif args.help_topic in helptopics:
                 hlpt = helptopics[args.help_topic]
                 hlpt[0](hlpt[1], hlpt[2])