Support --index-url and --extra-index-url parameters, the same as pip

[gthb]

We run (and I imagine many companies run) a local PyPI server with two sides to it: a cache for the actual PyPI, and a local repository for our own internal packages. We use these with pip via the parameters --index-url and --extra-index-url.

Curdling supports the short form -i ... but it should understand the long form --index-url as well, and should understand --extra-index-url.

Less importantly, Curdling is persnickety about the parameter order:

curd -i $PIP_INDEX_URL install -r requirements.txt 
usage: curd [-h] [-l {WARN,ERROR,DEBUG,INFO,WARNING,CRITICAL,NOTSET}]
            [--log-file LOG_FILE] [--log-name LOG_NAME] [-q] [-v]
            {install,uninstall} ...
curd: error: invalid choice: 'http://pypi.mycompany.com/local/' (choose from u'install', u'uninstall')

It needs the -i parameter to come after install, else it gets confused.

[clarete]

Just a friendly remind; This bug will be fixed in the next release cycle!