Hi, Ulisses
Right now your application wouldn’t compile if you have cyclic dependencies and
would scream at compile time.
Example:
# a.ex
defmodule A do
B.run()
end
# b.ex
defmodule B do
A.run()
end
Compile-time error message:
Compiling 2 files (.ex)
== Compilation error in file lib/b.ex ==
** (CompileError) deadlocked waiting on module A
lib/b.ex:2: (module)
(stdlib 3.14.2) erl_eval.erl:680: :erl_eval.do_apply/6
== Compilation error in file lib/a.ex ==
** (CompileError) deadlocked waiting on module B
lib/a.ex:2: (module)
(stdlib 3.14.2) erl_eval.erl:680: :erl_eval.do_apply/6
Compilation failed because of a deadlock between files.
The following files depended on the following modules:
lib/b.ex => A
lib/a.ex => B
Ensure there are no compile-time dependencies between those files and that the
modules they reference exist and are correctly named
> On 23 May 2021, at 01:35, alex via elixir-lang-core
> <[email protected]> wrote:
>
> I've spent 5 days untangling module deps in a huge Elixir codebase. I'm
> almost done, but I wish this problem didn't happen in the first place. I want
> the compiler to SCREAM at me if I've introduced a compile-time cyclic
> dependency.
>
> In the short term, my plan is to add a stage to the CI, which requires that
> `mix xref graph --format cycles --label compile` returns empty. This will be
> good for catching cycles before they get merged, but it would be even better
> if people could know as soon as it happens.
>
> Alex
>
>
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