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inter-hub/flake.nix
tegwick 881fef28cc
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fix(build): stub ActualTypes hub + patch importers to avoid 274 MB .hi crash
Generated.ActualTypes uses `module M` re-export syntax for 61 sub-modules;
GHC 9.10.3 embeds all 61 full sub-interfaces into ActualTypes.hi (~287 MB),
hitting the binary-deserialization limit at position 287686318.

Revert Cabal sub-library split (did not help — models-inner also crashed
with only 61 modules at the same invariant position). Apply the same fix
already working for Generated.Types in inter-hub-lib:

- inter-hub-models postUnpack: stub Generated.ActualTypes.hs + Generated.Types.hs
  to empty modules; patch every importer with direct sub-module imports (reads
  original ActualTypes.hs before stubbing to build the replacement import list)
- inter-hub-lib postUnpack: same for both hubs (each package has its own
  sourceRoot with originals intact)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-01 22:34:09 +02:00

233 lines
14 KiB
Nix

{
inputs = {
ihp.url = "github:digitallyinduced/ihp/v1.5";
nixpkgs.follows = "ihp/nixpkgs";
nixpkgs-nixos.follows = "ihp/nixpkgs-nixos";
flake-parts.follows = "ihp/flake-parts";
devenv.follows = "ihp/devenv";
systems.follows = "ihp/systems";
devenv-root = {
url = "file+file:///dev/null";
flake = false;
};
};
outputs = inputs@{ self, nixpkgs, nixpkgs-nixos, ihp, flake-parts, systems, ... }:
flake-parts.lib.mkFlake { inherit inputs; } {
systems = import systems;
imports = [ ihp.flakeModules.default ];
perSystem = { pkgs, config, lib, ... }: {
ihp = {
appName = "inter-hub";
enable = true;
projectPath = ./.;
packages = with pkgs; [
tailwindcss
];
haskellPackages = p: with p; [
# Haskell dependencies go here
p.ihp
base
wai
text
# ihp-mail # Email support: https://ihp.digitallyinduced.com/Guide/mail.html
# ihp-datasync # Real-time DataSync
# ihp-job-dashboard # Job dashboard UI
# ihp-typed-sql # Type-safe SQL queries
# ihp-pglistener # PostgreSQL LISTEN/NOTIFY
# Phase 5: Anthropic API calls
http-conduit
aeson
string-conversions
# Phase 9: External API, crypto, SDK generation
cryptohash-sha256
base16-bytestring
random-bytestring
yaml
network-uri
];
devHaskellPackages = p: with p; [
cabal-install
hlint
hspec
ihp-hspec
];
# Hoogle documentation server — disabled to save ~400 MB on constrained host
withHoogle = false;
# Disable relation type machinery for faster compilation
# relationSupport = false;
# Skip tests/haddock for specific packages to speed up builds
# dontCheckPackages = [ "my-package" ];
# doJailbreakPackages = [ "my-package" ];
# dontHaddockPackages = [ "my-package" ];
# Production build tuning
# optimizationLevel = "2"; # Default: "1", use "2" for more optimized production binaries
# rtsFlags = "-A96m -N"; # GHC runtime flags for compiled binaries
# Mount additional directories under /static/ in production builds
# static.extraDirs = {
# # Frontend = self.packages.${system}.frontend;
# };
# static.makeBundling = true; # Set false if not using Makefile for CSS/JS bundling
};
# OCI container image for Kubernetes deployment (Railiance01).
# Build: nix build .#docker
# Push: skopeo copy docker-archive:result docker://92.205.130.254:32166/coulomb/inter-hub:SHA
# Uses IHP's built-in unoptimized image; binary is /bin/RunProdServer.
packages.docker = config.packages.unoptimized-docker-image;
# Custom configuration that will start with `devenv up`
devenv.shells.default = {
# Start Mailhog on local development to catch outgoing emails
# services.mailhog.enable = true;
# PostgreSQL extensions
# services.postgres.extensions = extensions: [ extensions.postgis ];
# GHC 9.10.3 crash fix: Generated.ActualTypes uses `module M` re-export
# syntax for 61 sub-modules; the resulting ActualTypes.hi exceeds GHC's
# ~274 MB binary-deserialization limit (crash at position 287686318).
#
# pkgs is built from `import nixpkgs { overlays = devenv.shells.default.overlays; }`.
# IHP adds ihp.overlays.default to this list, which sets
# pkgs.ghc = haskellPackages.override { overrides = ihpOverrides }.
# We extend pkgs.ghc with a mkDerivation override (lib.mkAfter ensures
# we run after IHP's overlay, so prev.ghc is already IHP's package set).
# For inter-hub-models: stub Generated.ActualTypes + Generated.Types to
# empty modules; patch every importer with direct sub-module imports.
# For inter-hub-lib: same for both hubs (originals still intact in its
# sourceRoot — each package is unpacked independently).
overlays = lib.mkAfter [
(final: prev: {
ghc = prev.ghc.extend (hfinal: hprev: {
mkDerivation = args:
let drv = hprev.mkDerivation args;
in if (args.pname or "") == "inter-hub-models"
then drv.overrideAttrs (old: {
# GHC 9.10.3 crash: `module M` re-export syntax in Generated.ActualTypes
# embeds 61 full sub-interfaces into ActualTypes.hi (~287 MB), exceeding
# GHC's 274 MB binary read limit. Fix: stub both hub files to empty
# modules (tiny .hi), patch every importer to use direct sub-module
# imports (same semantics, no embedded sub-interfaces in .hi).
configureFlags = (old.configureFlags or []) ++ [
"--ghc-option=-O0"
"--ghc-option=-fomit-interface-pragmas"
];
postUnpack = (old.postUnpack or "") + ''
_actual="$sourceRoot/build/Generated/ActualTypes.hs"
# Collect direct sub-module imports before stubbing the hub
_act_imp=$(mktemp)
awk '/^import Generated\./{print}' "$_actual" > "$_act_imp"
# Stub both re-export hubs empty modules tiny .hi files
printf '%s\n' 'module Generated.ActualTypes () where' > "$_actual"
printf '%s\n' 'module Generated.Types () where' \
> "$sourceRoot/build/Generated/Types.hs"
# Patch every entity file that imports the hub direct imports
find "$sourceRoot/build" -name "*.hs" | while IFS= read -r _f; do
if grep -qE "^import Generated\.ActualTypes$" "$_f"; then
awk -v imp="$_act_imp" '
/^import Generated\.ActualTypes$/{
while ((getline ln < imp) > 0) print ln
close(imp)
next
}
{ print }' "$_f" > "$_f.new" && mv "$_f.new" "$_f"
fi
done
rm -f "$_act_imp"
'';
})
else if (args.pname or "") == "inter-hub-lib"
then drv.overrideAttrs (old: {
# Both Generated.Types and Generated.ActualTypes are empty stubs in
# models. Replace every bare import with direct sub-module imports,
# reading the originals from this package's own sourceRoot (each
# package is unpacked independently, so originals are intact here).
postUnpack = (old.postUnpack or "") + ''
_types="$sourceRoot/build/Generated/Types.hs"
_imp=$(mktemp)
awk '/^import Generated\./{print "import " $2}' "$_types" > "$_imp"
find "$sourceRoot" -name "*.hs" | while IFS= read -r _f; do
if grep -qE "^import Generated\.Types$" "$_f"; then
awk -v imp="$_imp" '
/^import Generated\.Types$/{
while ((getline ln < imp) > 0) print ln
close(imp)
next
}
{ print }' "$_f" > "$_f.new" && mv "$_f.new" "$_f"
fi
done
rm -f "$_imp"
_actual="$sourceRoot/build/Generated/ActualTypes.hs"
_act_imp=$(mktemp)
awk '/^import Generated\./{print}' "$_actual" > "$_act_imp"
find "$sourceRoot" -name "*.hs" | while IFS= read -r _f; do
if grep -qE "^import Generated\.ActualTypes$" "$_f"; then
awk -v imp="$_act_imp" '
/^import Generated\.ActualTypes$/{
while ((getline ln < imp) > 0) print ln
close(imp)
next
}
{ print }' "$_f" > "$_f.new" && mv "$_f.new" "$_f"
fi
done
rm -f "$_act_imp"
'';
})
else drv;
});
})
];
# Resource limits for constrained host (2 CPU, ~3.8 GiB RAM).
# -A32m: smaller minor heap (reduces GC pressure).
# -M2g: hard heap ceiling (prevents OOM on large compiles).
# Note: -N1 is intentionally omitted — it requires -threaded and
# would break build-generated-code and similar tools.
# GHC parallel module compilation is capped via -j1 in .ghci.
env.GHCRTS = "-A32m -M2g";
# Custom processes that don't appear in https://devenv.sh/reference/options/
processes = {
tailwind.exec = "tailwindcss -c tailwind/tailwind.config.js -i ./tailwind/app.css -o static/app.css --watch=always";
};
};
};
# Adding the new NixOS configuration for "production"
# See https://ihp.digitallyinduced.com/Guide/deployment.html#deploying-with-deploytonixos for more info
# Used to deploy the IHP application
flake.nixosConfigurations."production" = import ./Config/nix/hosts/production/host.nix { inherit inputs; };
};
# The following configuration speeds up build times by using the devenv, cachix and digitallyinduced binary caches
# You can add your own cachix cache here to speed up builds. For that uncomment the following lines and replace `CHANGE-ME` with your cachix cache name
nixConfig = {
extra-substituters = [
"https://devenv.cachix.org"
"https://cachix.cachix.org"
"https://digitallyinduced.cachix.org"
# "https://CHANGE-ME.cachix.org"
];
extra-trusted-public-keys = [
"devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
"cachix.cachix.org-1:eWNHQldwUO7G2VkjpnjDbWwy4KQ/HNxht7H4SSoMckM="
"digitallyinduced.cachix.org-1:y+wQvrnxQ+PdEsCt91rmvv39qRCYzEgGQaldK26hCKE="
# "CHANGE-ME.cachix.org-1:CHANGE-ME-PUBLIC-KEY"
];
};
}