{ 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.Types imports 119 modules, exceeding # the ~287 MB interface-file binary-deserialization limit. # # 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). # 2-way split (60 entities) still crashes — TypesPart1.hi itself hits 287 MB. # 4-way split (~30 entities, ~150 MB .hi each) stays safely under the limit. # When pname == "inter-hub-models", postUnpack replaces the monolithic # Types.hs → empty stub (not compiled); inter-hub-lib imports TypesPart1-8 directly. 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: { # 8-way split: ~15 entities per TypesPart → ~144 MB .hi each. # Root cause: any re-export hub for 119 IHP entities produces # a .hi file ≥ 287 MB (the GHC 9.10.3 Data.Binary.Get limit). # Generated.Types is replaced with an empty stub and removed # from exposed-modules; inter-hub-lib imports TypesPart1-8 directly. # -O0 strips unfoldings/specialisations for additional size reduction. configureFlags = (old.configureFlags or []) ++ [ "--ghc-option=-O0" ]; postUnpack = (old.postUnpack or "") + '' _types="$sourceRoot/build/Generated/Types.hs" # Create TypesPart1-8: 8-way split, ~15 entities each, ~144 MB .hi for _k in 1 2 3 4 5 6 7 8; do awk -v K=$_k 'BEGIN{n=0; N=8} /^import Generated\./{n++; mods[n]=$2} END{ q_prev = (K==1) ? 0 : int((K-1)*n/N)+1 q_curr = (K==N) ? n : int(K*n/N)+1 s = q_prev+1; e = q_curr print "module Generated.TypesPart" K " (" for(i=s;i<=e;i++){ if(i "$sourceRoot/build/Generated/TypesPart''${_k}.hs" done # Empty stub: Generated.Types is NOT a re-export hub. # Re-exporting all 119 entities would produce ~1.1 GB .hi, # crashing GHC when any downstream module reads it. # inter-hub-lib imports TypesPart1-8 directly instead. printf '%s\n' 'module Generated.Types () where' > "$_types" # Update cabal: add TypesPart1-8, remove bare Generated.Types # (empty stub is kept as a file but not exposed/compiled). # 8-space indent required — 4-space is a new stanza field. _cabal=$(ls "$sourceRoot"/*.cabal | head -1) if ! grep -q 'Generated\.TypesPart1' "$_cabal"; then awk '/Generated\.Types$/ && !/TypesPart/{next} /^ exposed-modules:/{ print " ghc-options: -O0" print; next } /Generated\.LearningInsightInclude/{ print for(k=1;k<=8;k++) print " Generated.TypesPart" k next } {print}' "$_cabal" > "$_cabal.new" mv "$_cabal.new" "$_cabal" fi ''; }) else if (args.pname or "") == "inter-hub-lib" then drv.overrideAttrs (old: { # Generated.Types is an empty stub in models (no re-export hub). # Replace every bare `import Generated.Types` with 8 TypesPart imports # so app modules get all entity types without touching a huge .hi file. postUnpack = (old.postUnpack or "") + '' find "$sourceRoot" -name "*.hs" | while read _f; do if grep -qE "^import Generated\.Types$" "$_f"; then awk '/^import Generated\.Types$/{ for(k=1;k<=8;k++) print "import Generated.TypesPart" k next }{print}' "$_f" > "$_f.new" && mv "$_f.new" "$_f" fi done ''; }) 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" ]; }; }