c85656eae6
Since the shebang calls nix-shell, we can safely assume that Nix (Lix, C++ Nix) is installed. Our scripts should support a wide enough range of Nix versions so that using the “impure” version of the tool is not a problem. This works around #400784. My theory is that the Nix frontend commands no longer work with older versions of the Nix daemon nor the Lix daemon in our workloads.
118 lines
3.5 KiB
Bash
Executable File
118 lines
3.5 KiB
Bash
Executable File
#! /usr/bin/env nix-shell
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#! nix-shell -i bash -p coreutils haskellPackages.cabal2nix-unstable git nixfmt-rfc-style -I nixpkgs=.
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set -euo pipefail
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self=$0
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print_help () {
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cat <<END_HELP
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Usage: $self [options]
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Options:
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--do-commit Commit changes to this file.
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-f | --fast Do not update the transitive-broken.yaml file.
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-h | --help Show this help.
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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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Unless --fast is used, it will then use the generated nix expression by
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running regenerate-transitive-broken-packages.sh which updates the transitive-broken.yaml
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file. Then it re-runs hackage2nix.
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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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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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END_HELP
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}
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DO_COMMIT=0
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REGENERATE_TRANSITIVE=1
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options=$(getopt -o "fh" -l "help,fast,do-commit" -- "$@")
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eval set -- "$options"
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while true; do
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case "$1" in
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--do-commit)
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DO_COMMIT=1
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;;
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-f|--fast)
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REGENERATE_TRANSITIVE=0
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;;
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-h|--help)
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print_help
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exit 0
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;;
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--)
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break;;
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*)
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print_help
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exit 1
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;;
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esac
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shift
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done
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HACKAGE2NIX="${HACKAGE2NIX:-hackage2nix}"
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config_dir=pkgs/development/haskell-modules/configuration-hackage2nix
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run_hackage2nix() {
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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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}
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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="$(nix-build -A haskellPackages.cabal2nix-unstable.compilerConfig --no-out-link)"
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echo "Running hackage2nix to regenerate pkgs/development/haskell-modules/hackage-packages.nix …"
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run_hackage2nix
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if [[ "$REGENERATE_TRANSITIVE" -eq 1 ]]; then
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echo "Regenerating transitive-broken.yaml … (pass --fast to $self to skip this step)"
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maintainers/scripts/haskell/regenerate-transitive-broken-packages.sh
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echo "Running hackage2nix again to reflect changes in transitive-broken.yaml …"
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run_hackage2nix
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fi
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nixfmt pkgs/development/haskell-modules/hackage-packages.nix
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if [[ "$DO_COMMIT" -eq 1 ]]; then
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git add pkgs/development/haskell-modules/configuration-hackage2nix/transitive-broken.yaml
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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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