generated from coulomb/repo-seed
Bernd Worsch
debc0b7d81
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Root cause: devenv shell reads devenv.nix only; IHP's Haskell setup is in flake.nix's devenv.shells.default which is only loaded by nix develop. Fix: create devenv.yaml to register IHP as a devenv input (pinned to the same rev as flake.lock) with overlays.default applied. Update devenv.nix to set IHP_LIB/IHP env vars and enable languages.haskell with pkgs.ghc (IHP-overlay GHC) + all project packages; add ghcid explicitly. devenv.lock pins IHP at df3922d (matches flake.lock). scripts/compile-check: updated header comments and added IHP_LIB echo; switches from ghcid to ghci one-shot (ghcid not available in all shells). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
69 lines
3.4 KiB
Nix
69 lines
3.4 KiB
Nix
# devenv.nix — required by devenv v2+.
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#
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# IHP's flake module (flake.nix) provides the full devenv shell via
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# `inputs.devenv.flakeModule`: Haskell toolchain, PostgreSQL, ghcid,
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# and RunDevServer. This file satisfies devenv v2's file-presence
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# requirement and adds project-specific overrides on top.
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#
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# Duplicates the settings from flake.nix devenv.shells.default so they
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# are applied under both devenv v1 (flake path) and devenv v2 (this file).
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{ pkgs, lib, config, inputs, ... }:
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# devenv.nix — devenv v2 shell configuration.
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#
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# `devenv shell` reads only this file (not flake.nix's devenv.shells.default).
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# IHP's flake module configures devenv.shells.default — that is only visible
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# to `nix develop`. This file therefore duplicates the IHP-critical parts so
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# that `devenv shell` also has a working Haskell + IHP_LIB environment.
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#
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# devenv.yaml registers IHP as a devenv input (pinned rev matching flake.lock)
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# and applies IHP's nixpkgs overlay, making pkgs.ghc the IHP Haskell package
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# set (ihp, ihp-hspec, ghcid, etc.).
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{
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# ── Resource limits (constrained host: 2 CPU / ~3.8 GiB RAM) ─────────────
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# -A32m: smaller minor heap; -M2g: hard heap ceiling.
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# -N1 omitted: requires -threaded, which breaks IHP tools.
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# GHC parallel module compilation is capped via -j1 in .ghci.
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env.GHCRTS = "-A32m -M2g";
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# ── IHP environment variables ─────────────────────────────────────────────
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# IHP_LIB is read by .ghci (applicationGhciConfig) and by scripts/compile-check.
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# IHP is the legacy name used by older Makefiles.
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env.IHP_LIB = "${inputs.ihp.packages.${pkgs.stdenv.system}.ihp-env-var-backwards-compat}";
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env.IHP = "${inputs.ihp.packages.${pkgs.stdenv.system}.ihp-env-var-backwards-compat}";
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# ── Haskell toolchain ─────────────────────────────────────────────────────
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# IHP's nixpkgs overlay (applied via devenv.yaml overlays) makes pkgs.ghc
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# the IHP-augmented Haskell package set. pkgs.ghc.ghc is the GHC compiler.
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languages.haskell.enable = true;
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languages.haskell.package = pkgs.ghc.ghc.withPackages (p: with p; [
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p.ihp
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# Project runtime dependencies (mirrors flake.nix haskellPackages)
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http-conduit
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aeson
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string-conversions
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cryptohash-sha256
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base16-bytestring
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random-bytestring
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yaml
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network-uri
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# Dev / test tools
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cabal-install
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hlint
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hspec
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p.ihp-hspec
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]);
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# ghcid is used by scripts/compile-check-core; not auto-added by devenv.
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# LSP disabled — heavy binary not needed for CI-style compile checks.
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languages.haskell.lsp.enable = false;
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# ── Extra packages ────────────────────────────────────────────────────────
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packages = [
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pkgs.ghc.ghcid
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pkgs.nodePackages.tailwindcss
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];
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# ── Processes ─────────────────────────────────────────────────────────────
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# Tailwind CSS watcher — not part of IHP's core devenv module.
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processes.tailwind.exec = "tailwindcss -c tailwind/tailwind.config.js -i ./tailwind/app.css -o static/app.css --watch=always";
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}
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