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Fix COOKIE file missing in Nix build

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- Add postInstall hook to ensure COOKIE file exists
- Include ERTS and disable beam stripping in release config
- Handle mixRelease differences from local builds

This ensures the Elixir release works properly when built via Nix.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
ryan 2025-08-02 18:00:37 -07:00
parent 9d8ad1890b
commit f8173a1afb
2 changed files with 14 additions and 4 deletions
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4
mix.exs
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@ -33,7 +33,9 @@ defmodule SystemStatsDaemon.MixProject do
systant: [ systant: [
include_executables_for: [:unix], include_executables_for: [:unix],
applications: [runtime_tools: :permanent], applications: [runtime_tools: :permanent],
cookie: "systant-cookie-change-in-production" cookie: "systant-cookie-change-in-production",
include_erts: true,
strip_beams: false
] ]
] ]
end end

14
systant.nix
View File

@ -6,17 +6,25 @@ beamPackages.mixRelease rec {
src = fetchgit { src = fetchgit {
url = "https://git.ryanpandya.com/ryan/systant.git"; url = "https://git.ryanpandya.com/ryan/systant.git";
rev = "92fc90e3b470dd2d11ba3a84745e33195e8e9db3"; rev = "9d8ad1890b682a58aaa27406a7f28337c4c67d5f";
sha256 = lib.fakeSha256; # Replace with actual hash after first build attempt sha256 = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
}; };
# Mix dependencies will be automatically fetched and cached by Nix # Mix dependencies will be automatically fetched and cached by Nix
mixFodDeps = beamPackages.fetchMixDeps { mixFodDeps = beamPackages.fetchMixDeps {
pname = "systant-mix-deps"; pname = "systant-mix-deps";
inherit src version; inherit src version;
sha256 = lib.fakeSha256; # Will get this from first build failure sha256 = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
}; };
# Ensure COOKIE file exists
postInstall = ''
if [ ! -f $out/releases/COOKIE ]; then
mkdir -p $out/releases
echo "systant-cookie-change-in-production" > $out/releases/COOKIE
fi
'';
meta = with lib; { meta = with lib; {
description = "Systant - System stats MQTT daemon for monitoring system metrics"; description = "Systant - System stats MQTT daemon for monitoring system metrics";
homepage = "https://git.ryanpandya.com/ryan/systant"; homepage = "https://git.ryanpandya.com/ryan/systant";