update_ssh_keys.sh

#!/usr/bin/env sh

TARGET_DIR='/home/kookxiang/.ssh'
GITHUB_USERNAME='kookxiang'

if ! [ -d ${TARGET_DIR} ]; then
    mkdir ${TARGET_DIR}
    chmod 0700 ${TARGET_DIR}
fi
if ! [ -f ${TARGET_DIR}/authorized_keys ]; then
    touch ${TARGET_DIR}/authorized_keys
    chmod 0600 ${TARGET_DIR}/authorized_keys
fi

curl -sS https://api.github.com/users/${GITHUB_USERNAME}/keys | grep -Po '"key": ".+?"' | sed -e 's/\"key\": \"//' -e 's/"$//' >> ${TARGET_DIR}/authorized_keys.new
if [ $? != 0 ]; then exit 1; fi

cat ${TARGET_DIR}/authorized_keys.new > ${TARGET_DIR}/authorized_keys
rm -rf ${TARGET_DIR}/authorized_keys.new
echo >> ${TARGET_DIR}/authorized_keys
if [ -f ${TARGET_DIR}/alternate_keys ]; then
	cat ${TARGET_DIR}/alternate_keys >> ${TARGET_DIR}/authorized_keys
	echo >> ${TARGET_DIR}/authorized_keys
fi