Build hatter as cached cabal package for iOS/watchOS#214
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Build hatter as cached cabal package for iOS/watchOS#214jappeace-sloth wants to merge 1 commit intojappeace:masterfrom
jappeace-sloth wants to merge 1 commit intojappeace:masterfrom
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Mirror the Android approach from cross-deps.nix: build hatter via callCabal2nix in ios-deps.nix so the .a and package DB entry are cached. Demo apps and consumers only recompile Main.hs + run_main.c (the per-app entry point) instead of all 22 Hatter modules + 19 C sources from scratch every time. Changes: - ios-deps.nix: add hatterSrc param, hatterOverride (strips exe/test stanzas), compose into overrides, collect hatter .a in deps - ios.nix, watchos.nix: pass hatterSrc = ../. to ios-deps.nix - lib.nix: when crossDeps is provided, mkIOSLib and mkWatchOSLib skip copying Hatter/*.hs and cbits/*.c, only compile run_main.c + Main.hs with -package-db pointing at the cached pkgdb. Standalone fallback (crossDeps == null) keeps current from-source behavior. Prompt: Implement the plan to build hatter as a cached package for iOS/watchOS (like Android) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This was referenced Apr 21, 2026
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jappeace
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Apr 26, 2026
Combines two improvements to the Nix build infrastructure:
1. Deduplicate nix/lib.nix (995 → ~700 lines, 30% reduction):
- Extract shared data lists (modules, C sources, headers, symbols)
and helper functions into top-level let bindings
- Merge mkIOSLib + mkWatchOSLib into internal mkAppleStaticLib
parameterised by platform; public API preserved via thin wrappers
- Merge mkSimulatorApp + mkWatchOSSimulatorApp into internal
mkAppleSimulatorApp; public API preserved
- Replace 14 repetitive NDK compile blocks with map over list
- Hoist applePkgs, appleGhc, gmpStatic, libffiStatic to top-level
2. Build hatter as a cached cabal package for iOS/watchOS:
- ios-deps.nix: add hatterSrc param, build hatter via callCabal2nix
so the .a and package DB entry are cached
- ios.nix, watchos.nix: pass hatterSrc to ios-deps.nix
- mkAppleStaticLib: when crossDeps is provided, only compile
Main.hs + run_main.c instead of all 22 modules + 19 C sources
- Standalone fallback (crossDeps == null) preserved
Adding a new bridge module now means editing 1 list, not 6+ places.
Demo apps and consumers only recompile their entry point.
Prompt: combine PR #213 and #214 into a single PR
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
cross-deps.nixapproach for iOS/watchOS: build hatter viacallCabal2nixinios-deps.nixso the.aand package DB entry are cachedMain.hs+run_main.cinstead of all 22 Hatter modules + 19 C sources from scratch every timecrossDeps == null) preserves current from-source behavior for callers that don't useios-deps.nixTest plan
nix-instantiate --parsepasses on all modified files (done locally)🤖 Generated with Claude Code