Support for multiple phoenix applications under an Umbrella App

[gjaldon]

Support for multiple phoenix applications under an Umbrella App

[joshprice]

We ended up using something like this where we had multiple Phoenix apps with assets but with a router which didn't have any assets. The router failed to mix ph[oeni]x when priv/static did not exist so we ended up with this solution.

This approach can support Phoenix 1.2 or 1.3 apps. Use yarn by ensuring there is a yarn.lock file in each assets directory.

cd $build_dir

# Phoenix 1.2
mix cmd --app app_a "(yarn install && yarn run deploy) || true"
mix cmd --app app_a mix phoenix.digest

# Phoenix 1.3
mix cmd --app app_b "(cd assets && yarn install && yarn run deploy) || true"
mix cmd --app app_b mix phx.digest

/cc @JonRowe

[joshprice]

Since this seems to be the simplest way to achieve this, it'd be nice to add some instructions to the README

[edouardmenayde]

What is the status on this ?
I would be willing to make this feature happen but I'm not sure where I should start. Any idea ?

[JonRowe]

A couple of things need to happen,phx.digest needs to not error in an umbrella context if theres no assets folder, a task needs to be able to exist for installing assets that runs across the umbrella.

[axelson]

Specifically the install_and_cache_deps() in build.sh also needs to either support multiple assets directories or have a means to be easily disabled:

heroku-buildpack-phoenix-static/lib/build.sh

Line 117 in fa86249

install_and_cache_deps() {