Hari Sekhon - Hammerspoon Mac Event-Driven Automation Code

• Summary
• Setup
  • Install Hammerspoon
    • Add Hammerspoon Code
  • Run Hammerspoon
    • Auto-Start Hammerspoon
    • Allow Desktop Notifications
• Automation Code
  • Auto-Switch to Multi-Output to Shazam from TV/Movies while listening on AirPods
  • Auto-run Speed Test when connecting to a Wifi network

Summary

Mac event driven automation using Hammerspoon.

Hammerspoon is a system event handler for Mac.

The code is written in Lua.

Includes:

• Auto-switching to Multi-Output for Shazaming when connecting headphones
• Automatically running Speed Test when connecting to a wifi network

Setup

Install Hammerspoon

Install Hammerspoon using Homebrew:

brew install hammerspoon --cask

Add Hammerspoon Code

mkdir -p -v ~/github

git clone https://github.com/HariSekhon/Hammerspoon ~/github/hammerspoon

ln -svFhw ~/github/hammerspoon ~/.hammerspoon

Output:

/Users/hari/.hammerspoon -> /Users/hari/github/hammerspoon

Run Hammerspoon

Finally, start Hammerspoon, you should see its icon in the menu bar.

open -a Hammerspoon

Auto-Start Hammerspoon

Set Hammerspoon to start at login (you can tick this in the Hammerspoon Preferences UI) or just run this:

osascript -e 'tell application "System Events" to make login item at end with properties {path:"/Applications/Hammerspoon.app", hidden:false}'

Allow Desktop Notifications

Optionally allow pop-up desktop notifications from Hammerspoon so that your code can notify you when it's done something for you (I recommend Banners that automatically disappear without having to click them).

System Settings -> Notifications ->Hammerspoon:

open "x-apple.systempreferences:com.apple.Notifications-Settings.extension?bundleId=org.hammerspoon.Hammerspoon"

Automation Code

Auto-Switch to Multi-Output to Shazam from TV/Movies while listening on AirPods

Automatically switches from AirPods connection to Multi-Output Audio Device and Blackhole input to be able to Shazam songs while watching a movie or TV show on AirPods.

You will need to install the Blackhole audio driver and set up a Midi Multi-Output Audio device too.

If using headphones other than AirPods you can simply edit the matching line in the code:

if current:match("AirPods") then

See HariSekhon/Knowledge-Base - Audio page section for more details on this setup.

Auto-run Speed Test when connecting to a Wifi network

TODO + refactor

More Core Repos

Knowledge

DevOps Code

Containerization

CI/CD

Databases - DBA - SQL

DevOps Reloaded

Monitoring

Templates

Desktop

Spotify

The rest of my original source repos are here.

Pre-built Docker images are available on my DockerHub.