script to set ~/.gitconfig to students gitconfig written for youbot

git-set-user.sh

#!/usr/bin/env bash

#
# This is a shared machine. I have added this
# quick script to set the git config variables
#
# If you want this to work add
#

if [ -d ~/gitconfig ]; then

user="$1"
if [ -z $user ]; then
    echo "Usage: \$ git-set-user [username]"
    echo "available usernames are:"
    ls ~/gitconfig --format=single-column |\
        grep gitconfig |\
        sed -e 's/\.gitconfig//'
    exit
fi


if [ -f ~/gitconfig/${user}.gitconfig ]; then
    while true; do
    read -p "Replace ~/.gitconfig with ${user}.gitconfig? [y/n] " yn
    case $yn in
        [Yy]* ) mv ~/gitconfig/NOTICE.txt ~/.gitconfig; 
		cat ~/gitconfig/${user}.gitconfig >> ~/.gitconfig; break;;
        [Nn]* ) exit;;
        * ) echo "Please answer yes or no";;
    esac
    done
else
   echo "the user: ${user}, does not have a gitconfig"
   echo "please add a gitconfig file:"
   echo "~/gitconfig/${user}.gitconfig"
   exit
fi

else
   echo "the directory ~/gitconfig does not exist"
   exit
fi