Proof of concept for this issue in the Domo Library.
Run the the proof of concept for the bug with the included docker stack for development and production.
Copy the example file:
cp .env.example .env
Create the secret key base:
$ mix phx.gen.secret
zf1VzetidccgkGNVTOij+fOVh+2GJbyME8zyX6ZcoTL6Jg+xCjqBPIcNnyQhkbti
Add the secret to the .env file:
SECRET_KEY_BASE=zf1VzetidccgkGNVTOij+fOVh+2GJbyME8zyX6ZcoTL6Jg+xCjqBPIcNnyQhkbti
Build the development image:
docker-compose build dev
Get a shell inside the docker container:
docker-compose run --rm --service-ports dev
Now you should be in the docker container shell...
In case you have already fetched the deps and build the app from the host you need to remove the build and deps folder:
rm -rf _build deps
Get deps:
mix deps.get
Run with:
iex -S mix phx.server
Visit http://localhost:4000 or do it with cURL:
$ curl localhost:4000
{"data":{"since":"2021-04-10T18:30:01.263609","state":"todo","title":"Task Todo"}}
Build the release:
docker-compose build release
Run the release:
docker-compose up prod
Visit http://localhost:8000 or do it with cURL:
$ curl localhost:8000
{"errors":{"detail":"Internal Server Error"}}
and the error in the logs:
Request: GET /
prod_1 | ** (exit) an exception was raised:
prod_1 | ** (UndefinedFunctionError) function Mix.Compilers.ApplicationTracer.trace/2 is undefined (module Mix.Compilers.ApplicationTracer is not available)
prod_1 | Mix.Compilers.ApplicationTracer.trace({:alias_reference, [line: 10], NaiveDateTime}, #Macro.Env<aliases: [], context: nil, context_modules: [ProgressType], file: "/app/lib/progress_type.ex", function: nil, functions: [{Kernel, [!=: 2, !==: 2, *: 2, ...]}], lexical_tracker: #PID<3.1671.0>, line: 7, macro_aliases: [], macros: [{Domo, ...}, {...}], module: ProgressType, requires: [...], ...>)
prod_1 | (elixir 1.11.3) src/elixir_env.erl:36: :elixir_env."-trace/2-lc$^0/1-0-"/3
prod_1 | (elixir 1.11.3) src/elixir_env.erl:36: :elixir_env.trace/2
prod_1 | (elixir 1.11.3) lib/macro.ex:1440: Macro.do_expand_once/2
prod_1 | (elixir 1.11.3) lib/macro.ex:1610: Macro.expand_until/2
prod_1 | (domo 1.0.1) lib/domo/type_spec_matchable/remote_type.ex:11: Domo.TypeSpecMatchable.RemoteType.expand/2
prod_1 | (domo 1.0.1) lib/domo/type_contract.ex:642: Domo.TypeSpecMatchable.Any.match_spec?/3
prod_1 | (domo_bug 0.1.0) lib/progress_type.ex:7: ProgressType.TypeChecker.__field_error/1