nixpkgs/maintainers/scripts/haskell/update-stackage.sh

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#! /usr/bin/env nix-shell
#! nix-shell -i bash -p nix curl jq git gnused gnugrep -I nixpkgs=.
# shellcheck shell=bash
set -eu -o pipefail
# Stackage solver to use, LTS or Nightly
# (should be capitalized like the display name)
SOLVER=LTS
TMP_TEMPLATE=update-stackage.XXXXXXX
readonly SOLVER
readonly TMP_TEMPLATE
toLower() {
printf "%s" "$1" | tr '[:upper:]' '[:lower:]'
}
tmpfile=$(mktemp "$TMP_TEMPLATE")
tmpfile_new=$(mktemp "$TMP_TEMPLATE")
stackage_config="pkgs/development/haskell-modules/configuration-hackage2nix/stackage.yaml"
trap 'rm "${tmpfile}" "${tmpfile_new}"' 0
touch "$tmpfile" "$tmpfile_new" # Creating files here so that trap creates no errors.
curl -L -s "https://stackage.org/$(toLower "$SOLVER")/cabal.config" >"$tmpfile"
old_version=$(grep '^# Stackage' $stackage_config | sed -e 's/.\+ \([A-Za-z]\+ [0-9.-]\+\)$/\1/g')
version="$SOLVER $(sed -rn "s/^--.*http:..(www.)?stackage.org.snapshot.$(toLower "$SOLVER")-//p" "$tmpfile")"
if [[ "$old_version" == "$version" ]]; then
echo "No new stackage version"
exit 0 # Nothing to do
fi
echo "Updating Stackage from $old_version to $version."
# Create a simple yaml version of the file.
sed -r \
-e '/^--/d' \
-e 's|^constraints:||' \
-e 's|^ +| - |' \
-e 's|,$||' \
-e '/^with-compiler:/d' \
-e '/installed$/d' \
-e '/^$/d' \
< "${tmpfile}" | sort --ignore-case >"${tmpfile_new}"
cat > $stackage_config << EOF
# Stackage $version
# This file is auto-generated by
# maintainers/scripts/haskell/update-stackage.sh
default-package-overrides:
EOF
# Drop restrictions on some tools where we always want the latest version.
sed -r \
-e '/ cabal2nix /d' \
-e '/ distribution-nixpkgs /d' \
-e '/ jailbreak-cabal /d' \
-e '/ language-nix /d' \
-e '/ hackage-db /d' \
-e '/ cabal-install /d' \
-e '/ lsp /d' \
-e '/ lsp-types /d' \
-e '/ lsp-test /d' \
-e '/ hie-bios /d' \
-e '/ ShellCheck /d' \
-e '/ Agda /d' \
-e '/ stack /d' \
< "${tmpfile_new}" >> $stackage_config
# Explanations:
# cabal2nix, distribution-nixpkgs, jailbreak-cabal, language-nix: These are our packages and we know what we are doing.
# lsp, lsp-types, lsp-test, hie-bios: These are tightly coupled to hls which is not in stackage. They have no rdeps in stackage.
# ShellCheck: latest version of command-line dev tool.
# Agda: The Agda community is fast-moving; we strive to always include the newest versions of Agda and the Agda packages in nixpkgs.
if [[ "${1:-}" == "--do-commit" ]]; then
git add $stackage_config
git commit -F - << EOF
haskellPackages: stackage $old_version -> $version
This commit has been generated by maintainers/scripts/haskell/update-stackage.sh
EOF
fi