TIL how to fork a Heroku application
Tonight I had a need to create a duplicate of a running app on Heroku, and discovered heroku-fork. This is a plugin which was extracted from the core Heroku CLI some time ago, but is easily installable using the command
heroku plugins:install heroku-fork. It is run via:
heroku fork --from [app name] --to [app name, can be new app]
The command adds functionality which can copy one app to another, including
code, addons, dyno configuration, and databases. In my case, I used it to quickly test some changes to a service worker against a clone of a production application before pushing these changes live. It no more than a couple of minutes to copy the application, and then I simply destroyed it when I was done.
A super handy trick that I’ll have to keep in mind for future support work.