water-level-tracker

Parse html page with water level data and save it to a file.

Setup

First time setup: install Chrome/Chromium for puppeteer

npx puppeteer browsers install chrome

Run

pnpm start --commitAndPush --copyToClipboard

Support

Only catalunia, Spain is supported.

Cron

To run the script every day at 10:00 AM:

crontab -e

If using vim, press i to enter insert mode. First, add the PATH line (required for pnpm and Node to work in cron):

PATH=/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

Then add your cron job(s):

0 10 * * * cd /Users/{userName}/water-level-tracker && pnpm start --commitAndPush

Type :wq to save and exit.

Note: The PATH line is essential because cron runs with a minimal environment. Without it, cron won't find pnpm or node.

launchd (macOS alternative — recommended)

launchd is the native macOS scheduler. It handles sleep better than cron via PreventSystemSleep.

The template includes an EnvironmentVariables section with the necessary PATH for Homebrew tools (pnpm and node).

Copy the template and replace {userName} with your username, then load it:

cp launchd/water-level-tracker.plist ~/Library/LaunchAgents/com.{userName}.water-level-tracker.plist
launchctl load ~/Library/LaunchAgents/com.{userName}.water-level-tracker.plist

To check the status:

launchctl list | grep water-level-tracker

To unload:

launchctl unload ~/Library/LaunchAgents/com.{userName}.water-level-tracker.plist

Logs are saved to ~/Library/Logs/water-level-tracker.log and ~/Library/Logs/water-level-tracker.error.log.