{ 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: { # Root cause: "module M" re-export syntax in IHP-generated hubs # causes GHC to embed the FULL interface of M into the hub's .hi. # Generated.ActualTypes uses "module M" for 61 sub-modules; the # resulting ActualTypes.hi hits the GHC 9.10.3 Data.Binary.Get # 274 MB limit (crashes at position 287686318: not enough bytes) # when WidgetVersionInclude reads it back. Same pattern applied to # Generated.Types (119 entity re-exports) — made into empty stub # with direct imports in inter-hub-lib instead. # Fix for ActualTypes: remove the explicit (module M, ...) export # list so GHC stores compact name-reference entries in the .hi. configureFlags = (old.configureFlags or []) ++ [ "--ghc-option=-O0" "--ghc-option=-fomit-interface-pragmas" ]; postUnpack = (old.postUnpack or "") + '' # Strip "module M" re-export syntax from Generated.ActualTypes. # With 61 "module M" entries GHC embeds every sub-interface # into ActualTypes.hi, producing a file that hits the GHC 9.10.3 # Data.Binary.Get 274 MB limit (crashes at position 287686318) # when WidgetVersionInclude reads it. Removing the explicit # export list keeps the module semantically identical (all # imports are still re-exported) but forces GHC to use # compact name-reference entries instead of embedded copies. _actual="$sourceRoot/build/Generated/ActualTypes.hs" awk '/^module Generated\.ActualTypes /{print "module Generated.ActualTypes where"; next} {print}' \ "$_actual" > "$_actual.new" && mv "$_actual.new" "$_actual" _types="$sourceRoot/build/Generated/Types.hs" printf '%s\n' 'module Generated.Types () where' > "$_types" # Remove Generated.Types from exposed-modules: # reduces HPT entry count by 1 (476 instead of 477). _cabal=$(ls "$sourceRoot"/*.cabal | head -1) awk '/Generated\.Types$/ && !/TypesPart/{next} {print}' \ "$_cabal" > "$_cabal.new" mv "$_cabal.new" "$_cabal" ''; }) else if (args.pname or "") == "inter-hub-lib" then drv.overrideAttrs (old: { # Generated.Types is an empty stub in models — no re-export hub. # Replace every bare `import Generated.Types` with direct imports # of all 119 individual entity modules (read from the original # Generated/Types.hs before it was replaced in models postUnpack — # each package gets its own unpacked sourceRoot, so Types.hs is # still intact here). Individual entity .hi files are ~9 MB each. postUnpack = (old.postUnpack or "") + '' _types="$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" ''; }) 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" ]; }; }