mirror of
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1158f20f15
This allows other scripts to detect whether anything changed without resorting to git-diff(1): If nothing changed, stdout will be empty (i.e. we now enforce that other messages go to stderr). To make sure that this behavior is retained in the future, the scripts' behavior is briefly documented in the files' header.
62 lines
2.1 KiB
Bash
Executable file
62 lines
2.1 KiB
Bash
Executable file
#! /usr/bin/env nix-shell
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#! nix-shell -i bash -p curl jq git gnused -I nixpkgs=.
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#
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# SYNOPSIS
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#
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# Update Hackage index and hashes data exposed via pkgs.all-cabal-hashes.
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#
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# DESCRIPTION
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#
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# Find latest revision of the commercialhaskell/all-cabal-hashes repository's
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# hackage branch and update pkgs/data/misc/hackage/pin.json accordingly.
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#
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# This data is used by hackage2nix to generate hackage-packages.nix. Since
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# hackage2nix uses the latest version of a package unless an explicit
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# constraint is configured, running this script indirectly updates packages
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# (when hackage2nix is executed afterwards).
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#
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# Prints a version difference to stdout if the pin has been updated, nothing
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# otherwise.
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#
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# EXIT STATUS
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#
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# Always exit with zero (even if nothing changed) unless there was an error.
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set -euo pipefail
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pin_file=pkgs/data/misc/hackage/pin.json
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current_commit="$(jq -r .commit $pin_file)"
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old_date="$(jq -r .msg $pin_file | sed 's/Update from Hackage at //')"
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git_info="$(curl -H "Accept: application/vnd.github.v3+json" https://api.github.com/repos/commercialhaskell/all-cabal-hashes/branches/hackage)"
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head_commit="$(echo "$git_info" | jq -r .commit.sha)"
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commit_msg="$(echo "$git_info" | jq -r .commit.commit.message)"
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new_date="$(echo "$commit_msg" | sed 's/Update from Hackage at //')"
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if [ "$current_commit" != "$head_commit" ]; then
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echo "Updating all-cabal-hashes from $old_date to $new_date" >&2
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url="https://github.com/commercialhaskell/all-cabal-hashes/archive/$head_commit.tar.gz"
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hash="$(nix-prefetch-url "$url")"
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jq -n \
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--arg commit "$head_commit" \
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--arg hash "$hash" \
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--arg url "$url" \
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--arg commit_msg "$commit_msg" \
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'{commit: $commit, url: $url, sha256: $hash, msg: $commit_msg}' \
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> $pin_file
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else
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echo "No new all-cabal-hashes version" >&2
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fi
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version_diff="$old_date -> $new_date"
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if [[ "${1:-}" == "--do-commit" ]]; then
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git add pkgs/data/misc/hackage/pin.json
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git commit -F - << EOF
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all-cabal-hashes: $version_diff
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This commit has been generated by maintainers/scripts/haskell/update-hackage.sh
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EOF
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else
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echo "$version_diff"
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fi
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