Automatically deploy from server to heroku every 4 hours.

auto-deploy.sh

#!/usr/bin/expect
set timeout 120
spawn ./deploy.sh
expect "Username for 'https://git.heroku.com':"
send "HEROKU_EMAIL\r"
expect "Password for 'https://HEROKU_EMAIL@git.heroku.com':"
send "HEROKU_ACCESS_TOKEN\r"
expect eof

crontab

# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').
#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h  dom mon dow   command
0 */4 * * * /usr/bin/expect /root/auto-deploy.sh

deploy.sh

#!/bin/bash
rm -rf /root/bread-code-website
git clone git@github.com:repo/REPO_NAME.git
cd /root/REPO_NAME
git remote add heroku https://git.heroku.com/HEROKU_GIT_REMOTE
git commit --allow-empty -m "deploy commit"
git push heroku main -f