Error on Elixir 1.15.2/Erlang 26.0.2 Umbrella

[Toady00]

I have ex doc in the root mix.exs file, and I've upgraded to 0.30.1. I'm getting an error that the makeup application isn't available when trying to run mix docs:

$ mix docs

15:25:41.640 [notice] Application makeup exited: exited in: Makeup.Application.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (UndefinedFunctionError) function Makeup.Application.start/2 is undefined (module Makeup.Application is not available)
            (makeup 1.1.0) Makeup.Application.start(:normal, [])
            (kernel 9.0.2) application_master.erl:293: :application_master.start_it_old/4

15:25:41.761 [notice] Application nimble_parsec exited: :stopped

15:25:41.761 [notice] Application earmark_parser exited: :stopped

15:25:41.761 [notice] Application eex exited: :stopped
** (MatchError) no match of right hand side value: {:error, {:makeup, {:bad_return, {{Makeup.Application, :start, [:normal, []]}, {:EXIT, {:undef, [{Makeup.Application, :start, [:normal, []], []}, {:application_master, :start_it_old, 4, [file: ~c"application_master.erl", line: 293]}]}}}}}}
    (ex_doc 0.30.1) lib/mix/tasks/docs.ex:331: Mix.Tasks.Docs.run/3
    (mix 1.15.2) lib/mix/task.ex:447: anonymous fn/3 in Mix.Task.run_task/5
    (mix 1.15.2) lib/mix/cli.ex:92: Mix.CLI.run_task/2
Error: exit status 1

[Toady00]

I has having another problem with dialyzer jeremyjh/dialyxir#508 , and their solution was to add dialyzer to each child app. I tried that here and now I don't get the same error, but I'm getting an error for one of my apps ** (Mix) expected :name or :app to be found in the project definition in mix.exs but there is a app key in the project of that app.

[josevalim]

Did you add ExDoc to child projects or to the root? Are you invoking it from the root or the child projects? How have you specified it?

[Toady00]

Sorry, I originally had {:ex_doc, "~> 0.29", only: :dev, runtime: false},. I tried changing it to {:ex_doc, "~> 0.30", only: :dev, runtime: false}, when I saw there was a newer version. Running mix docs from the umbrella root gave me the original error I posted in the first message. Bumping the version still resulted in the same error.

Then I thought I'd add ex doc to each child, so I added {:ex_doc, "~> 0.30", only: :dev, runtime: false}, to every child application and then tried running mix docs from the root again, and that's when I got the error about the :name or :app from the second post above.

[josevalim]

I cannot reproduce the error. mix docs at the root always tells me missing ":name or :app", which is expected. You need to add it to every child and, if you want to run on all of them, you can do mix cmd mix docs. :)

[Toady00]

Ah, I incorrectly assumed that running mix docs at the root would generate an aggregated doc at the root level. I was hoping to have all the documentation for the entire umbrella project together under one index.html entry point.

[josevalim]

Yeah, perhaps we could implement this feature, but it certainly isn't one we support right now. :)

[halostatue]

Generating an aggregate docset at the root would definitely be of interest. An pointers on what would be required to explore this?