#!/bin/sh

PORT=9000
APP_NAME=""
APP_ROOT=""
GIT_DIR=""
BRANCH=""

while read oldrev newrev ref
do
        if [[ $ref = refs/heads/"$BRANCH" ]];
        then
                echo "Stopping $APP_NAME"
                pm2 stop "${APP_NAME}"
                echo "Ref $ref received. Deploying ${BRANCH} branch to production..."
                git --work-tree="$APP_ROOT" --git-dir="$GIT_DIR" checkout -f
                echo "Installing dependencies"
                cd "$APP_ROOT"
                yarn install
                echo "Restarting the app"
                PORT="$PORT" pm2 start ./bin/www --name "${APP_NAME}"
                echo "Build Succeeded!"
        else
                echo "Ref $ref received. Doing nothing: only the ${BRANCH} branch may be deployed on this server."
        fi
done