Convert standard_kconfig() to argparse for better feedback

Stuff like this is not the pinnacle of helpful design, and hides that
the commands actually have long help texts (that can be viewed with
pydoc):

    $ ./menuconfig.py --help
    [Errno 2] No such file or directory: '--help'

Fix it by converting standard_kconfig() to argparse, and add a
'description' argument to it for the command-specific help text. --help
now shows the same help text shown by pydoc, and some other error
messages are improved as well.

Also fix some copy-paste errors and outdated paths in the help texts for
the all*config commands.

1 files changed, 5 insertions, 5 deletions

diff --git a/allnoconfig.py b/allnoconfig.py
index e162ccb..1a763f9 100755
--- a/allnoconfig.py
+++ b/allnoconfig.py
@@ -11,16 +11,16 @@ in the KCONFIG_CONFIG environment variable.
 
 Usage for the Linux kernel:
 
-  $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/allmodconfig.py
-
-See the examples/allnoconfig_walk.py example script for another way to
-implement this script.
+  $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/allnoconfig.py
 """
+
+# See examples/allnoconfig_walk.py for another way to implement this script.
+
 import kconfiglib
 
 
 def main():
-    kconf = kconfiglib.standard_kconfig()
+    kconf = kconfiglib.standard_kconfig(__doc__)
 
     # Avoid warnings that would otherwise get printed by Kconfiglib for the
     # following: