View Source mix compile.phoenix (Phoenix v1.6.14)
Compiles Phoenix source files that support code reloading.
If you are using Elixir v1.11+ or later, there is no longer
a need to use this module as this functionality is now provided
by Elixir. Just remember to update __phoenix_recompile__? to
__mix_recompile__? in any module that may define it.