55 lines
2.3 KiB
Bash
Executable file
55 lines
2.3 KiB
Bash
Executable file
#! /usr/bin/env nix-shell
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#! nix-shell -i bash -p coreutils haskellPackages.cabal2nix-unstable git nix -I nixpkgs=.
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# This script is used to regenerate nixpkgs' Haskell package set, using the
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# tool hackage2nix from the nixos/cabal2nix repo. hackage2nix looks at the
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# config files in pkgs/development/haskell-modules/configuration-hackage2nix
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# and generates a Nix expression for package version specified there, using the
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# Cabal files from the Hackage database (available under all-cabal-hashes) and
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# its companion tool cabal2nix.
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#
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# Related scripts are update-hackage.sh, for updating the snapshot of the
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# Hackage database used by hackage2nix, and update-cabal2nix-unstable.sh,
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# for updating the version of hackage2nix used to perform this task.
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#
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# Note that this script doesn't gcroot anything, so it may be broken by an
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# unfortunately timed nix-store --gc.
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set -euo pipefail
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HACKAGE2NIX="${HACKAGE2NIX:-hackage2nix}"
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# To prevent hackage2nix fails because of encoding.
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# See: https://github.com/NixOS/nixpkgs/pull/122023
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export LC_ALL=C.UTF-8
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config_dir=pkgs/development/haskell-modules/configuration-hackage2nix
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echo "Obtaining Hackage data"
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extraction_derivation='with import ./. {}; runCommandLocal "unpacked-cabal-hashes" { } "tar xf ${all-cabal-hashes} --strip-components=1 --one-top-level=$out"'
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unpacked_hackage="$(nix-build -E "$extraction_derivation" --no-out-link)"
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echo "Generating compiler configuration"
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compiler_config="$(nix-build -A haskellPackages.cabal2nix-unstable.compilerConfig --no-out-link)"
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echo "Starting hackage2nix to regenerate pkgs/development/haskell-modules/hackage-packages.nix ..."
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"$HACKAGE2NIX" \
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--hackage "$unpacked_hackage" \
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--preferred-versions <(for n in "$unpacked_hackage"/*/preferred-versions; do cat "$n"; echo; done) \
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--nixpkgs "$PWD" \
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--config "$compiler_config" \
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--config "$config_dir/main.yaml" \
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--config "$config_dir/stackage.yaml" \
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--config "$config_dir/broken.yaml" \
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--config "$config_dir/transitive-broken.yaml"
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if [[ "${1:-}" == "--do-commit" ]]; then
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git add pkgs/development/haskell-modules/hackage-packages.nix
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git commit -F - << EOF
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haskellPackages: regenerate package set based on current config
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This commit has been generated by maintainers/scripts/haskell/regenerate-hackage-packages.sh
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EOF
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fi
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echo "Regeneration of hackage-packages.nix finished."
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