Setup script for cloning git submodules through an enterprise proxy

SetupGithubAccess.sh

#!/bin/bash

# Sets up and configured Git to work with an enterprise proxy for
# cloning submodules through the git/https protocol. Tunnels all git
# traffic through the proxy to allow for these commands.

#Set proxies:
http_proxy="proxy.example.com:83"
http_proxy_port="83" #specifically specify the port only
https_proxy="proxy.example.com:83"


####################
function printInRed {
    printf '\e[0;31m%s\e[0m\n' "$1"
}
function printInGreen {
    printf '\e[0;32m%s\e[0m\n' "$1"
}
function printInCyan {
    printf '\e[0;36m%s\e[0m\n' "$1"
}

printInCyan "Setting up GitHub access for Enterprise Network..."
#Set proxies for current terminal session (Allow to connect for brew)
export HTTPS_PROXY=$http_proxy
export HTTP_PROXY=$https_proxy

#Check if homebrew is installed
command -v brew >/dev/null 2>&1 || { printInRed 'Homebrew is not installed. Please install Homebrew before continuing.'; exit 1; }

#Open permissions for /usr/local & /Library/Caches/Homebrew for read and write access
sudo chmod +a "everyone allow list,add_file,search,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity" /usr/local
if [ -d /Library/Caches/Homebrew ]; then
	sudo chmod +a "everyone allow list,add_file,search,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity" /Library/Caches/Homebrew
fi

#Install socat through Homebrew
brew install socat

if [ ! -d /usr/local/git ]; then
	printInRed 'A proper version of Git is not installed.'
	printInRed 'Download the latest from https://git-scm.com'
	exit 1;
fi

#Create the gitproxy file
echo "Creating git-proxy..."
if [ ! -f /usr/local/bin/gitproxy ]; then
	#create if it doesn't yet exist
	echo '_proxy=$http_proxy' >> /usr/local/bin/gitproxy
	echo '_proxyport=$http_proxy_port' >> /usr/local/bin/gitproxy
	echo 'exec socat STDIO PROXY:$_proxy:$1:$2,proxyport=$_proxyport' >> /usr/local/bin/gitproxy
	
	#Enable execute access for gitproxy
	chmod +x /usr/local/bin/gitproxy
else
	echo "The git-proxy already exists."
fi


#Set up the system-wide git config for proxy
echo "Configuring git to use proxy..."
sudo git config --system url."https://github.com/".insteadOf git@github.com:
sudo git config --system core.gitproxy gitproxy

#Done
printInGreen "GitHub Access Configured for All System Users."