Reflecting Heroku push version within the app

Question

Every time I push my app to heroku I see the line

-----> Launching... done, v43

Is there a way to make that version number apear within the

Answer 1

It's now possible to try the Heroku feature Roberto wrote about in his answer, without contacting Heroku. It's called Heroku Labs: Dyno Metadata and you can enable it by

heroku labs:enable runtime-dyno-metadata -a 

and then the information is available (on the next deploy) as environment variables:

~ $ env
HEROKU_APP_ID:                   
HEROKU_APP_NAME:                 example-app
HEROKU_DYNO_ID:                  
HEROKU_RELEASE_VERSION:          v42
HEROKU_SLUG_COMMIT:              
HEROKU_SLUG_DESCRIPTION:         Deploy 2c3a0b2
...

We don't have to setup any config file or else.