diff options
Diffstat (limited to 'maintainers/scripts/haskell/regenerate-hackage-packages.sh')
| -rwxr-xr-x | maintainers/scripts/haskell/regenerate-hackage-packages.sh | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/maintainers/scripts/haskell/regenerate-hackage-packages.sh b/maintainers/scripts/haskell/regenerate-hackage-packages.sh new file mode 100755 index 0000000000000..79b93f5b7cb1b --- /dev/null +++ b/maintainers/scripts/haskell/regenerate-hackage-packages.sh @@ -0,0 +1,20 @@ +#! /usr/bin/env nix-shell +#! nix-shell -i bash -p coreutils haskellPackages.cabal2nix-latest -I nixpkgs=. + +# This script is used to regenerate nixpkgs' Haskell package set, using a tool +# called hackage2nix. hackage2nix looks at +# pkgs/development/haskell-modules/configuration-hackage2nix.yaml and generates +# a Nix expression for package version specified there, using the Cabal files +# from the Hackage database (available under all-cabal-hashes) and its +# companion tool cabal2nix. +# +# Related scripts are update-hackage.sh, for updating the snapshot of the +# Hackage database used by hackage2nix, and update-cabal2nix-latest.sh, +# for updating the version of hackage2nix used to perform this task. + +set -euo pipefail + +extractionDerivation='with import ./. {}; runCommand "unpacked-cabal-hashes" { } "tar xf ${all-cabal-hashes} --strip-components=1 --one-top-level=$out"' +unpacked_hackage="$(nix-build -E "$extractionDerivation" --no-out-link)" + +hackage2nix --hackage "$unpacked_hackage" --preferred-versions <(for n in "$unpacked_hackage"/*/preferred-versions; do cat "$n"; echo; done) --nixpkgs "$PWD" --config pkgs/development/haskell-modules/configuration-hackage2nix.yaml |