Xonsh: Question: How to set env for subprocess?

[roxma]

Hi, thanks for this amazing project,

I've been searcing around the documentation, but I can't find an equivalence command for
HTTP_PROXY=myproxy curl www.google.com

With bash, I have an alias proxy="http_proxy=myproxy https_proxy=myproxy ", so that I can use proxy when I need to, e.g. proxy curl www.google.com. Is it possible with xonsh?

[roxma]

Current working attempt

def proxy(args):
    def impl():
        $http_proxy='....' 
        $https_proxy=''....' 
        return args
    $[@(impl())]

aliases['proxy'] = proxy

# remove helper functions
del proxy

[gforsyth]

Hey @roxma -- you can take a look here for how to use the swap method on the env: http://xon.sh/bash_to_xsh.html?highlight=swap

You can also use the env command,

env HTTP_PROXY='....' mycommand

[roxma]

Thanks

[scopatz]

Also, I'd happily welcome any PRs that add support for this, though I think we'd probably want the syntax $HTTP_PROXY='....' mycommand

[AstraLuma]

I'd be happy with PRs to that effect with considerable test coverage.