maintainers/scripts/haskell/update-cabal2nix-unstable.sh

   1 #! /usr/bin/env nix-shell
   2 #! nix-shell -i bash -p coreutils curl jq gnused haskellPackages.cabal2nix-unstable -I nixpkgs=.
   3
   4 # Updates cabal2nix-unstable to the latest master of the nixos/cabal2nix repository.
   5 # See regenerate-hackage-packages.sh for details on the purpose of this script.
   6
   7 set -euo pipefail
   8
   9 # fetch current master HEAD from Github
  10 head_info="$(curl -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/NixOS/cabal2nix/branches/master)"
  11 # extract commit hash
  12 commit="$(jq -r .commit.sha <<< "$head_info")"
  13 # extract commit timestamp and convert to date
  14 date="$(date "--date=$(jq -r .commit.commit.committer.date <<< "$head_info")" +%F)"
  15 # generate nix expression from cabal file, replacing the version with the commit date
  16 echo '# This file defines cabal2nix-unstable, used by maintainers/scripts/haskell/regenerate-hackage-packages.sh.' > pkgs/development/haskell-modules/cabal2nix-unstable.nix
  17 cabal2nix --subpath cabal2nix "https://github.com/NixOS/cabal2nix/archive/$commit.tar.gz" | sed -e 's/version = ".*"/version = "'"unstable-$date"'"/' >> pkgs/development/haskell-modules/cabal2nix-unstable.nix