How do I set the env at alias??

johnhu

Hi all,

I am a newbie to Elixir. I try to create an alias for running another group of tests which has its owned environment. It can be run with MIX_ENV specified. May I set the env at alias to have a simpler command? Like api_test:

defp aliases do
  [
    "ecto.setup": ["ecto.create", "ecto.migrate", "run priv/repo/seeds.exs"],
    "ecto.reset": ["ecto.drop", "ecto.setup"],
    "test": ["ecto.create --quiet", "ecto.migrate", "test"],
    "api_test": "test --only api_test:true"
  ]
end

13 comments

/phoenix #alias #mix

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2020-06-18 09:47:20 UTC

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NobbZ

defp aliases do
  [
    …,
    "api_test": &api_test/1
  ]
end

defp api_test(_) do
  Mix.env(:test) # or whatever env you need
  MixTask.run("test" ["--only", "api_test:true"])
end

This is from memory though, can’t test it right now.

Post #1

johnhu

Wow.. This is a great idea.. I will do that.

It failed. It tries to load the live reload server

** (UndefinedFunctionError) function Phoenix.LiveReloader.init/1 is undefined (module 
Phoenix.LiveReloader is not available)
    Phoenix.LiveReloader.init([])
    (plug) lib/plug/builder.ex:302: Plug.Builder.init_module_plug/4
    (plug) lib/plug/builder.ex:286: anonymous fn/5 in Plug.Builder.compile/3
    (elixir) lib/enum.ex:1899: Enum."-reduce/3-lists^foldl/2-0-"/3
    (plug) lib/plug/builder.ex:284: Plug.Builder.compile/3
    (plug) expanding macro: Plug.Builder.__before_compile__/1

Post #2

LostKobrakai

there’s also this in mix.exs:

def project do
    [
      …,
      preferred_cli_env: [
        coveralls: :test,
        "coveralls.detail": :test,
        "coveralls.post": :test,
        "coveralls.html": :test,
        "test.reset": :test,
        "test.integration": :test
      ]
    ]
  end

Post #3

johnhu

After adding the preferred_cli_env, the previous error is gone. But it still not run the test because:
** (Mix) “mix test” is running on environment “api_test”. If you are running tests along another task, please set MIX_ENV explicitly

It looks like I have to use MIX_ENV…

Post #4

NobbZ

I think you just did the :preferred_cli_env wrong. Can you please show how you set it up?

Post #5

johnhu

I use:

def project do
[
  ...
  preferred_cli_env: [
    "api_test": :api_test
  ]
]

end

Post #6

NobbZ

Since you want to run :api_test in the MIX_ENV=test this needs to be api_test: :test.

Post #7

johnhu

no.. I want to run :api_test with the MIX_ENV=api_test… It does run it with api_test. But the mix test gives me the warning:

** (Mix) “mix test” is running on environment “api_test”. If you are running tests along another task, please set MIX_ENV explicitly

Post #8

NobbZ

You are not allowed to call mix test in any other environment than :test, if you want to do it despite all warnings, then you have to set MIX_ENV explicitely. This is kind of saying “Yes, I know what I am doing and I am really sure I want to do this with all of its implcations and possible side effects which in worst case might destroy the world”.

If you really wan’t to use mix test in another environment, then there is no other way than to use the environment variable.

Post #9