#!/usr/bin/env sh
# compat: +ash +bash +dash -hush +zsh

pegg() { ### @-
    ### download and (pip) install a Python "egg" from a project on GitHub,
    ### defaulting to the master branch. this uses [`pippy`](#pippy) internally.
    ###
    ### ```sh
    ### # install the development version of https://github.com/rthalley/dnspython
    ### $ pegg rthalley dnspython
    ### # or instead install the latest stable version (as of writing)
    ### $ pegg rthalley dnspython 3933b49
    ### ```
    [ $# -ge 2 ] || { printf "%s\n" "$0: too few arguments" >&2; return 1; }
    pippy "https://github.com/$1/$2/tarball/${3:-master}#egg=$2"
}

[ -n "${preload+-}" ] || . ~/sh/preload || exit 2
eval ${preload:-preload} pippy
[ -n "${preload+-}" ] || pegg "$@"