#!/bin/bash

notags() {
    while read line; do
        echo $line | sed -e "s/<[^>]*>/ /g" -e "s/  / /g"
    done
}

user=$1
wanted=$2

list=`curl -s http://gist.github.com/api/v1/xml/gists/${user}`

repos=`echo $list | xmlstarlet sel -t -c "gists/gist/repo" | notags`

for repo in $repos; do
    files=`echo $list | xmlstarlet sel -t -c "gists/gist[repo=${repo}]/files/file/file" | notags`
    for file in $files; do
        if [[ $file == $wanted ]]; then
            curl -s https://gist.github.com/raw/$repo/$file
        fi
    done
done