`auto_db_update.sh`

#!/bin/zsh
 
cd /Users/minho/code/django/childcare || exit
 
echo "childcare: auto_db_update.sh"
 
source .venv/bin/activate
 
echo "starting django server: childcare"
nohup python3 manage.py runserver 8999 >django.log 2>&1 &
DJANGO_PID=$!
 
/opt/homebrew/bin/redis-cli config set stop-writes-on-bgsave-error no
if /opt/homebrew/bin/redis-cli ping | grep -q "PONG"; then
    echo "redis is running: 🏓 PONG"
 
    echo "starting celery worker: childcare"
    nohup celery -A project worker --beat --scheduler django --loglevel=info >celery.log 2>&1 &
    CELERY_PID=$!
 
    tail -f celery.log &
    TAIL_PID=$!
else
    echo "redis not running, celery will not start"
    exit 1
fi
 
sleep 30
 
echo "committing changes..."
git add db.sqlite3
git commit -m "$(date '+%Y-%m-%d:%H:%M:%S-auto-db-update')"
git push
 
echo "cleaning up logs..."
/opt/homebrew/bin/trash django.log celery.log
 
echo "terminating processes..."
# kill $DJANGO_PID
# kill $CELERY_PID
# kill $TAIL_PID
 
if [ -n "$DJANGO_PID" ] && ps -p $DJANGO_PID >/dev/null; then
    echo "Terminating Django process with PID: $DJANGO_PID"
    kill $DJANGO_PID
else
    echo "Django process with PID $DJANGO_PID is not running"
fi
 
if [ -n "$CELERY_PID" ] && ps -p $CELERY_PID >/dev/null; then
    echo "Terminating Celery process with PID: $CELERY_PID"
    kill $CELERY_PID
else
    echo "Celery process with PID $CELERY_PID is not running"
fi
 
if [ -n "$TAIL_PID" ] && ps -p $TAIL_PID >/dev/null; then
    echo "Terminating tail process with PID: $TAIL_PID"
    kill $TAIL_PID
else
    echo "Tail process with PID $TAIL_PID is not running"
fi
 
echo "done"

❯ crontab -e

# Run the script every day at midnight
0 0 * * * /Users/minho/code/django/childcare/auto_db_update.sh

Errors encountered

1. Command not found

Although the script was running as the same current user (whoami), some commands were not executing properly as it didn't find the path.

# use full path
 
# before
redis-cli
trash
 
# after
/opt/homebrew/bin/redis-cli
/opt/homebrew/bin/trash

# find the full path
 
❯ which redis-cli
/opt/homebrew/bin/redis-cli
 
❯ which trash
/opt/homebrew/bin/trash

2. GitHub access error

Error message from the mail

fatal: could not read Username for 'https://github.com': Device not configured

Fix: use ssh instead of https to access

❯ git remote set-url origin [email protected]:minho42/childcare.git

Above command will change the [remote "origin"] url in the config like so

❯ git remote -v
origin	[email protected]:minho42/childcare.git (fetch)
origin	[email protected]:minho42/childcare.git (push)

❯ cat .git/config
 
# Before: https
 
[remote "origin"]
	url = https://github.com/minho42/childcare.git
	fetch = +refs/heads/*:refs/remotes/origin/*
 
# After: ssh
 
[remote "origin"]
	url = [email protected]:minho42/childcare.git
	fetch = +refs/heads/*:refs/remotes/origin/*

Note: ssh to be set locally and on github for above to work

# if these are not done already
 
# make ssh keys
❯ ssh-keygen -t ed25519 -C "[email protected]"
 
# set content of this on github: Settings -> SSH and GPG keys -> New SSH key
❯ cat ~/.ssh/id_ed25519.pub
ssh-ed25519 AA... [email protected]
 
# check if it works
❯ ssh -T [email protected]
Hi minho42! You've successfully authenticated, but GitHub does not provide shell access.