mirror of
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241 lines
10 KiB
Nix
241 lines
10 KiB
Nix
{
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# For current default and explicitly supported GHCs https://search.nixos.org/packages?query=ghc&from=0&size=500&channel=unstable, Nixpkgs implicitly supports older minor versions also, until the configuration departs from compatibility with them.
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# Compiler in a form ghc8101 <- GHC 8.10.1, just remove spaces and dots
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compiler ? "ghc8107"
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# Deafult.nix is a unit package abstraciton that allows to abstract over packages even in monorepos:
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# Example: pass --arg cabalName --arg packageRoot "./subprojectDir", or map default.nix over a list of tiples for subprojects.
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# cabalName is package resulting name: by default and on error resolves in haskellPackages.developPackage to project root directory name by default, but outside the haskellPackages.developPackage as you see below packageRoot can be different
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, cabalName ? "hnix"
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, packageRoot ? pkgs.nix-gitignore.gitignoreSource [ ] ./.
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# This settings expose most of the Nixpkgs Haskell.lib API: https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/lib.nix
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# Some of these options implicitly enable other options they require, and some counterpoint options clash, obviously
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# Don't fail at configure time if there are multiple versions of the same package in the (recursive) dependencies of the package being built. Will delay failures, if any, to compile time.
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, allowInconsistentDependencies ? false
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# Escape the version bounds from the cabal file. You may want to avoid this function.
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, doJailbreak ? false
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# Nix dependency checking, compilation and execution of test suites listed in the package description file.
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, doCheck ? true
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# Just produce a SDist src tarball
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, sdistTarball ? false
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# The strict packaging process as used on Hackage. Tests consistency of the Cabal file.
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, buildFromSdist ? true
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# Allow a shell environment to be requested
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, returnShellEnv ? false
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# Turn all warn into err with {-Wall,-Werror}
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, failOnAllWarnings ? false
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# `failOnAllWarnings` + `buildFromSdist`
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, buildStrictly ? false
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# 2020-06-02: NOTE: enableDeadCodeElimination = true: On GHC =< 8.8.3 macOS build falls due to https://gitlab.haskell.org/ghc/ghc/issues/17283
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, enableDeadCodeElimination ? false
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# Disabled GHC code optimizations make build/tolling/dev loops faster.
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# Works also for Haskel IDE Engine and GHCID.
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# Enable optimizations for production use, and to pass benchmarks.
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, disableOptimization ? true
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# Use faster `gold` ELF linker from GNU binutils instead of older&slower but more versatile GNU linker. Is not available by default since macOS does not have it.
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, linkWithGold ? false
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# Provide an inventory of performance events and timings for the execution. Provides informaiton in an absolute sense. Nothing is timestamped.
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, enableLibraryProfiling ? false
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, enableExecutableProfiling ? false
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# Include tracing information & abilities. Tracing records the chronology, often with timestamps and is extensive in time
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, doTracing ? false
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# Include DWARF debugging information & abilities
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, enableDWARFDebugging ? true
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# Strip results from all debugging symbols
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, doStrip ? false
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# Nixpkgs expects shared libraries
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, enableSharedLibraries ? true
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# Ability to make static libraries
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, enableStaticLibraries ? false
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# Make hybrid executable that is also a shared library
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, enableSharedExecutables ? false
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# link executables statically against haskell libs to reduce closure size
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, justStaticExecutables ? false
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, enableSeparateBinOutput ? false
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# checkUnusedPackages: is `failOnAllWarnings` + `cabal sdist` + post-build dep check.
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# Currently uses `packunused` or GHC 8.8 internals, later switches into GHC internal feature.
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# Adds a post-build check to verify that dependencies declared in the cabal file are actually used.
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, checkUnusedPackages ? false
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# Generation and installation of haddock API documentation
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, doHaddock ? false
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# Generate hyperlinked source code for documentation using HsColour, and have Haddock documentation link to it.
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, doHyperlinkSource ? false
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# Generation and installation of a coverage report. See https://wiki.haskell.org/Haskell_program_coverage
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, doCoverage ? false
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# doBenchmark: Dependency checking + compilation and execution for benchmarks listed in the package description file.
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, doBenchmark ? false
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# For binaries named in `executableNamesToShellComplete` list, generate and bundle-into package an automatically loaded shell complettions
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, generateOptparseApplicativeCompletions ? false
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, executableNamesToShellComplete ? [ "hnix" ]
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# Include Hoogle executable and DB into derivation
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, withHoogle ? false
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# Nix by default updates and uses locally configured nixpkgs-unstable channel
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# Nixpkgs revision options:
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# `rev` vals in order of freshness -> cache & stability:
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# { master
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# , <commitHash>
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# , haskell-updates # Haskell development branch in Nixpkgs, can be inconsistent. Weekly merged into the upstream
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# , nixpkgs-unstable # Default branch on Nix installation, default for non NixOS
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# , nixos-unstable # nixpkgs-unstable that passes a bunch of base tests
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# , nixos-20.03 # Last stable release, gets almost no updates to recipes, gets only required backports
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# ...
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# }
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, rev ? "b165ce0c4efbb74246714b5c66b6bcdce8cde175"
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, pkgs ?
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if builtins.compareVersions builtins.nixVersion "2.0" > 0
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then
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if ((rev == "") || (rev == "default") || (rev == "local"))
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then import <nixpkgs> {}
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# Do not guard with hash, so the project is able to use current channels (rolling `rev`) of Nixpkgs
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else import (builtins.fetchTarball "https://github.com/NixOS/nixpkgs/archive/${rev}.tar.gz") {}
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// {
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# Try to build dependencies even if they are marked broken.
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config.allowBroken = true;
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}
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else abort "Requires Nix >= 2.0"
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, mkDerivation ? null
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, inNixShell ? false
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}:
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let
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hlib = pkgs.haskell.lib;
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lib = pkgs.lib;
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getDefaultGHC = "ghc${
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(
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# Remove '.' from the string 8.8.4 -> 884
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lib.stringAsChars (c: if c == "." then "" else c)
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# Get default GHC version,
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(lib.getVersion pkgs.haskellPackages.ghc)
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)
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}";
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compilerPackage =
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if ((compiler == "") || (compiler == "default"))
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then getDefaultGHC
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else compiler;
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# Overlay source
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# hnix-store-src = pkgs.fetchFromGitHub {
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# owner = "haskell-nix";
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# repo = "hnix-store";
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# rev = "fd09d29b8bef4904058f033d693e7d928a4a92dc";
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# sha256 = "0fxig1ckzknm5g19jzg7rrcpz7ssn4iiv9bs9hff9gfy3ciq4zrs";
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# };
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overlay = lib.foldr lib.composeExtensions (_: _: {}) [
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# (import "${hnix-store-src}/overlay.nix" pkgs hlib)
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(self: super:
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lib.optionalAttrs withHoogle {
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ghc = super.ghc // { withPackages = super.ghc.withHoogle; };
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ghcWithPackages = self.ghc.withPackages;
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})
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];
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overrideHaskellPackages = orig: {
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buildHaskellPackages =
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orig.buildHaskellPackages.override overrideHaskellPackages;
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overrides = if orig ? overrides
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then lib.composeExtensions orig.overrides overlay
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else overlay;
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};
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haskellPackages = pkgs.haskell.packages.${compilerPackage}.override
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overrideHaskellPackages;
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# Application of functions from this list to the package in code here happens in the reverse order (from the tail). Some options depend on & override others, so if enabling options caused Nix error or not expected result - change the order, and please do not change this order without proper testing.
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listSwitchFunc =
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[
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{ switch = sdistTarball; function = hlib.sdistTarball; }
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{ switch = buildFromSdist; function = hlib.buildFromSdist; }
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{ switch = buildStrictly; function = hlib.buildStrictly; }
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{ switch = disableOptimization; function = hlib.disableOptimization; }
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{ switch = doJailbreak; function = hlib.doJailBreak; }
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{ switch = doStrip; function = hlib.doStrip; }
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{ switch = enableDWARFDebugging; function = hlib.enableDWARFDebugging; }
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{ switch = linkWithGold; function = hlib.linkWithGold; }
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{ switch = failOnAllWarnings; function = hlib.failOnAllWarnings; }
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{ switch = justStaticExecutables; function = hlib.justStaticExecutables; }
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{ switch = checkUnusedPackages; function = hlib.checkUnusedPackages {}; }
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{ switch = generateOptparseApplicativeCompletions; function = hlib.generateOptparseApplicativeCompletions executableNamesToShellComplete; }
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{ switch = doHyperlinkSource; function = hlib.doHyperlinkSource; }
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];
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# Function that applies enabled option to the package, used in the fold.
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onSwitchApplyFunc = set: object:
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if set.switch
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then set.function object
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else object;
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# General description of package
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package = haskellPackages.developPackage {
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name = cabalName;
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# Do not include into closure the files listed in .gitignore
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root = packageRoot;
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overrides = self: super: {
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semialign = super.semialign_1_2;
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relude = super.relude_1_0_0_1;
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};
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modifier = drv: hlib.overrideCabal drv (attrs: {
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buildTools = (attrs.buildTools or []) ++ [
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haskellPackages.cabal-install
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];
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testHaskellDepends = attrs.testHaskellDepends ++ [
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pkgs.nix
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haskellPackages.criterion
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];
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# Declare that the header set arguments as according Haskell.lib switches
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inherit allowInconsistentDependencies;
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inherit doCheck;
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inherit enableDeadCodeElimination;
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inherit enableLibraryProfiling;
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inherit enableExecutableProfiling;
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inherit enableSharedLibraries;
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inherit enableStaticLibraries;
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inherit enableSharedExecutables;
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inherit enableSeparateBinOutput;
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inherit doBenchmark;
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inherit doCoverage;
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inherit doHaddock;
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configureFlags = lib.optional doTracing "--flags=tracing";
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passthru = {
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nixpkgs = pkgs;
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inherit haskellPackages;
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};
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});
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inherit returnShellEnv;
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};
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# One part of Haskell.lib options are argument switches, those are in `inherit`ed list.
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# Other part - are function wrappers over pkg. Fold allows to compose those.
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# composePackage = foldr (if switch then function) (package) ([{switch,function}]) == (functionN .. (function1 package))
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composedPackage = lib.foldr (onSwitchApplyFunc) package listSwitchFunc;
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in composedPackage
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