bash script for github to change all https clone/repo urls to ssh urls

git-chg-to-ssh.sh

#!/bin/bash

# Script git-chg-to-ssh.sh
# Uploaded to gist github
#
# By ikwyl6@protonmail.com
#
# Change all https github clone addresses to ssh
# Use DEBUG=[1|2] before command to see some debug output
# Use PROCEED=1 to actually make the 'set-url' change
#
# Example: 	DEBUG=1 ./git-chg-to-ssh.sh /home/user/repos
# 				PROCEED=1 ./git-chg-to-ssh.sh /home/user/repos

dest="$1" # root folder where you clones or github repositories live
user="" # your github username
website="https://github.com" # using github for main website
backup_file="$HOME/dev/github_links.txt" # change this to whatever you like

if [[ "$dest" == "" ]]; then
	echo "Provide root directory of git dirs";
	exit 1;
fi

if [[ ! -d "$dest" ]]; then
	echo "$dest is not a directory"
	exit 1
fi

# Backup your existing github 'get-url' before you change them
backup_github_link() {
	echo "$1" >> $backup_file
}

while read dir; do
	cd "$dir";
	if [[ DEBUG -ge 2 ]]; then echo "dir: $dir"
	fi
	if [[ -d "$dir/.git" ]]; then
		git fetch
		# Read in all the remotes for a repository into array
		read -r -d '' -a remote_arr < <(git remote)
		repo_name_long="$(git rev-parse --show-toplevel)"
		repo_name=$(basename "$repo_name_long")
		echo "$repo_name"
		for remote in "${remote_arr[@]}"; do
			if [[ DEBUG -ge 1 ]]; then echo "remote: $remote"
			fi
			url=$(git remote get-url "$remote")
			backup_github_link $url
			if [[ $url == https* ]]; then
				# https://stackoverflow.com/questions/1898553/return-a-regex-match-in-a-bash-script-instead-of-replacing-it
				if [[ "$url" =~ $website/([a-zA-Z0-9_]+)/ ]]; then
					username="${BASH_REMATCH[1]}"
					if [[ DEBUG -ge 1 ]]; then echo "   username: $username"
					fi
				fi
				echo "   Updating https to ssh git..."
				new_url="git remote set-url $remote git@github.com:$username/$repo_name"
				if [[ DEBUG -ge 1 ]]; then echo -e "   $dir\n   old: $url\n   new: $new_url"
				fi
				if [[ PROCEED -eq 1 ]]; then
					git remote set-url $remote git@github.com:$username/$repo_name
				fi
			fi
		done
	fi
done < <(find "$dest/" -maxdepth 1 -type d)