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Add a 'debug' option to log drv hashes at all stages
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@ -7,6 +7,7 @@
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- #143: Changed `autoWire` to be an enum type, for granular controlling of which outputs to autowire.
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- #137: Expose cabal executables as flake apps. Add a corresponding `outputs.apps` option, while the `outputs.localPackages` option is renamed to `outputs.packages` (it now contains package metadata, including packages and its executables).
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- #148: Remove automatic hpack->cabal generation. Use `pre-commit-hooks.nix` instead.
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- #149: Fix unnecessary re-runs of cabal2nix evaluation. Add a `debug` option to enable produce verbose diagnostic messages.
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## 0.2.0 (Mar 13, 2023)
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@ -1,9 +1,11 @@
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# Like callCabal2nix, but does more:
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# - Source filtering (to prevent parent content changes causing rebuilds)
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# - Always build from cabal's sdist for release-worthiness
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{ pkgs, lib, self, ... }:
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{ pkgs, lib, self, debug, ... }:
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let
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log = import ./logging.nix { inherit lib debug; };
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fromSdist = self.buildFromCabalSdist or (builtins.trace "Your version of Nixpkgs does not support hs.buildFromCabalSdist yet." (pkg: pkg));
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mkNewStorePath = name: src:
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@ -23,12 +25,13 @@ lib.pipe pkgCfg.root
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[
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# Avoid rebuilding because of changes in parent directories
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(mkNewStorePath "source-${name}")
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(x: builtins.trace x.outPath x)
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(log.traceDebug "${name}.mkNewStorePath" (x: x.outPath))
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(root: self.callCabal2nix name root { })
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(log.traceDebug "${name}.cabal2nixDeriver" (x: x.cabal2nixDeriver.outPath))
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# Make sure all files we use are included in the sdist, as a check
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# for release-worthiness.
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fromSdist
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(log.traceDebug "${name}.fromSdist" (x: x.outPath))
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]
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@ -201,6 +201,15 @@ in
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default = self;
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defaultText = "Top-level directory of the flake";
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};
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debug = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable verbose trace output from haskell-flake.
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Useful for debugging.
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'';
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};
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basePackages = mkOption {
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type = types.attrsOf raw;
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description = ''
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@ -35,7 +35,10 @@ in
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localPackagesOverlay = self: _:
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let
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build-haskell-package = import ./build-haskell-package.nix { inherit pkgs lib self; };
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build-haskell-package = import ./build-haskell-package.nix {
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inherit pkgs lib self;
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inherit (config) debug;
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};
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in
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lib.mapAttrs build-haskell-package config.packages;
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11
nix/logging.nix
Normal file
11
nix/logging.nix
Normal file
@ -0,0 +1,11 @@
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{ lib, debug, ... }:
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{
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traceDebug = k: f:
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if debug then
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(x: lib.pipe x [
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(builtins.trace ("DEBUG[haskell-flake]: " + k + " " + f x))
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])
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else
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(x: x);
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}
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