1 files changed, 35 insertions, 0 deletions
diff --git a/maintainers/scripts/haskell/update-hackage.sh b/maintainers/scripts/haskell/update-hackage.sh
new file mode 100755
index 00000000000..a7cfecbbb0f
--- /dev/null
+++ b/maintainers/scripts/haskell/update-hackage.sh
@@ -0,0 +1,35 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p nix curl jq nix-prefetch-github git gnused -I nixpkgs=.
+
+# See regenerate-hackage-packages.sh for details on the purpose of this script.
+
+set -euo pipefail
+
+pin_file=pkgs/data/misc/hackage/pin.json
+current_commit="$(jq -r .commit $pin_file)"
+old_date="$(jq -r .msg $pin_file | sed 's/Update from Hackage at //')"
+git_info="$(curl -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/commercialhaskell/all-cabal-hashes/branches/hackage)"
+head_commit="$(echo "$git_info" | jq -r .commit.sha)"
+commit_msg="$(echo "$git_info" | jq -r .commit.commit.message)"
+new_date="$(echo "$commit_msg" | sed 's/Update from Hackage at //')"
+
+if [ "$current_commit" != "$head_commit" ]; then
+   url="https://github.com/commercialhaskell/all-cabal-hashes/archive/$head_commit.tar.gz"
+   hash="$(nix-prefetch-url "$url")"
+   jq -n \
+     --arg commit "$head_commit" \
+     --arg hash "$hash" \
+     --arg url "$url" \
+     --arg commit_msg "$commit_msg" \
+     '{commit: $commit, url: $url, sha256: $hash, msg: $commit_msg}' \
+     > $pin_file
+fi
+
+if [[ "${1:-}" == "--do-commit" ]]; then
+git add pkgs/data/misc/hackage/pin.json
+git commit -F - << EOF
+all-cabal-hashes: $old_date -> $new_date
+
+This commit has been generated by maintainers/scripts/haskell/update-hackage.sh
+EOF
+fi