Changes the git url type from https to ssh or vice versa

git-change-url

#!/usr/bin/env bash

# Utility to change the connection method for a git repo.

# === Colour Definitions ===
red='\e[0;31m'
green='\e[0;32m'
purple='\e[0;35m'
orange='\e[0;33m'
# No Color, i.e. turn off color
nc='\e[0m'

# https://github.com/foo/bar.git
# git@github.com:foo/bar.git

# git@gist.github.com:a9713f03f27ee35f0ee6.git
# https://gist.github.com/1ed86a70d4140bdf0e5c.git

# ssh url pattern   : git@<website>:<gitpath>
# https url pattern : https://<website>/<gitpath>

function print_usage(){
    echo -e "${red}Usage:${nc} $0 --to-ssh   ${orange}# converts https url to ssh url${nc}"
    echo -e "       $0 --to-https ${orange}# converts ssh url to https url${nc}"
}

function in_gitdir(){
    # check if in a git repo directory
    git branch &>/dev/null

    if (( $? == 0 ))
    then
	return 0
    else
	return 1
    fi
}

function convert_to_ssh(){
    sed -r -i 's:https\://([^/]+)/(.*\.git):git@\1\:\2:g' $(git rev-parse --git-dir)/config
}

function convert_to_https(){
    sed -r -i 's:git@([^/]+)\:(.*\.git):https\://\1/\2:g' $(git rev-parse --git-dir)/config
}

function main(){
    if [ in_gitdir ]
    then
        if [[ "$1" == "to-ssh" ]]
	then
	    convert_to_ssh
	else
	    convert_to_https
	fi
    else
        print_usage
	exit 3
    fi
}

if [ -z "$1" ]
then
    print_usage
    exit 1
elif [[ "$1" == "--to-ssh" ]]
then
    main "to-ssh"
elif [[ "$1" == "--to-https" ]]
then
    main "to-https"
else
    print_usage
    exit 2
fi