How to deploy Play application using activator to Heroku? - heroku

Question

I am trying to deploy an activator app to Heroku. Without an Proc-file Heroku tells me that no cedar app is detected. When i add a Proc file and add
web: ./activator start -Dhttp.port=${PORT}
the startup fails.
How to get it running on Heroku?
UPDATE
The problem was a (not yet needed) package.json. Heroku obviously infered by that file that it is a node.js app. After renaming the app startet without a Proc file. But now i got unresolved dependencies for
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: UNRESOLVED DEPENDENCIES ::
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: com.typesafe.play#play_2.11;2.3.2: not found
[warn] :: com.typesafe.play#play-jdbc_2.11;2.3.2: not found
[warn] :: com.atlassian.jwt#jwt-core;1.2.3: not found
[warn] :: com.atlassian.jwt#jwt-api;1.2.3: not found
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
and solved that by adding
resolvers += "typesafe" at "http://repo.typesafe.com/typesafe/releases/"
Then I had the problem that we use SASS and it is not supported by Heroku. So I tried to deploy via the sbt plugin. That led to the following problem:
[error] (fashion-advice-common/compile:deployHeroku) You must stage your application before deploying it!
[error] (fashion-advice-customer/compile:deployHeroku) Could not find app ''. Check that herokuAppName setting is correct.
[error] (fashion-advice-stylist/compile:deployHeroku) Could not find app ''. Check that herokuAppName setting is correct.
Perhaps because we use 3 sub modules?

Answer 1

Your Procfile should look more like this:
web: target/universal/stage/bin/name_of_app_repo -Dhttp.port=${PORT}
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