[New-bugs-announce] [issue13922] argparse handling multiple "--" in args improperly

[Warren Turkal]

New submission from Warren Turkal <wt at penguintechs.org>:

I have a program that runs something like the following:
$ hack run -- :target --arg1 --arg2 arg3 arg4

This basically runs a program identified by :target with the args. However, I cannot pass "--" to the program. For example, if I type:
$ hack run -- :hack run -- :target clean --help

the second "--" is swallowed by the parser, and I get an the help for "hack run" instead of instead of "hack clean". The run subcommand just does the following:

all_args = [target.bin_path] + args.args
os.execv(target.bin_path, all_args)

However, the first hack run has the following list for args:
args = Namespace(args=['run', ':hack', 'clean', '--help'], func=<function do_run at 0x19c3e60>, target=':hack')

Where is the second "--"? I would have expected the args list to be:
args=['run', '--', ':hack', 'clean', '--help']

About the python version, I am using python 2.6. However, I am using the latest release of argparse from [1] and am assuming that it's very similar code.

[1]http://code.google.com/p/argparse/downloads/list

----------
messages: 152443
nosy: Warren.Turkal
priority: normal
severity: normal
status: open
title: argparse handling multiple "--" in args improperly
type: behavior
versions: Python 2.7, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13922>
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