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fix: skip NIF compilation in prod — NIF is pre-built by Nix

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The prod build runs MIX_ENV=prod without make/gcc/net-snmp. The NIF
is pre-built by the towerops-nif Nix package and injected via
build.nix preBuild. Skip the mix compiler task in prod to avoid
'could not be found' CI errors.
This commit is contained in:
Graham McInitre 2026-07-16 09:42:40 -05:00
parent f1868908de
commit b0b085a2af
1 changed files with 22 additions and 2 deletions
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24
lib/mix/tasks/compile.towerops_nif.ex
View file

@ -1,12 +1,28 @@
defmodule Mix.Tasks.Compile.ToweropsNif do
@moduledoc """
Compiles the towerops_nif C NIF.
In dev/test, runs `make -C c_src` to build `priv/towerops_nif.so`.
In prod, the NIF is pre-built by Nix and injected via build.nix preBuild,
so this task is a no-op.
"""
use Mix.Task.Compiler
@impl true
def run(_args) do
if skip_compilation?() do
{:ok, []}
else
do_compile()
end
end
defp skip_compilation? do
Mix.env() == :prod or is_nil(System.find_executable("make"))
end
defp do_compile do
{result, _exit_code} = System.cmd("make", [], cd: "c_src", stderr_to_stdout: true, into: IO.stream())
case result do
@ -25,8 +41,12 @@ defmodule Mix.Tasks.Compile.ToweropsNif do
@impl true
def clean do
{_result, _exit_code} = System.cmd("make", ["clean"], cd: "c_src", stderr_to_stdout: true)
:ok
if skip_compilation?() do
:ok
else
{_result, _exit_code} = System.cmd("make", ["clean"], cd: "c_src", stderr_to_stdout: true)
:ok
end
rescue
_ -> :ok
end