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#! /usr/bin/env bash
set -eu -o pipefail
tmpfile=$(mktemp "update-stackage.XXXXXXX")
# shellcheck disable=SC2064
trap "rm ${tmpfile} ${tmpfile}.new" 0
curl -L -s "https://stackage.org/nightly/cabal.config" >"$tmpfile"
version=$(sed -rn "s/^--.*http:..(www.)?stackage.org.snapshot.nightly-//p" "$tmpfile")
# Create a simple yaml version of the file.
sed -r \
-e '/^--/d' \
-e 's|^constraints:||' \
-e 's|^ +| - |' \
-e 's|,$||' \
-e '/installed$/d' \
-e '/^$/d' \
< "${tmpfile}" | sort --ignore-case >"${tmpfile}.new"
# Drop restrictions on some tools where we always want the latest version.
sed -r \
-e '/ cabal-install /d' \
-e '/ cabal2nix /d' \
-e '/ cabal2spec /d' \
-e '/ distribution-nixpkgs /d' \
-e '/ git-annex /d' \
-e '/ hindent /d' \
-e '/ hledger/d' \
-e '/ hlint /d' \
-e '/ hoogle /d' \
-e '/ hopenssl /d' \
-e '/ jailbreak-cabal /d' \
-e '/ json-autotype/d' \
-e '/ language-nix /d' \
-e '/ shake /d' \
-e '/ ShellCheck /d' \
-e '/ stack /d' \
-e '/ weeder /d' \
< "${tmpfile}.new" > "${tmpfile}"
# Drop the previous configuration ...
# shellcheck disable=SC1004
sed -e '/ # Stackage Nightly/,/^$/c \TODO\
' -i pkgs/development/haskell-modules/configuration-hackage2nix.yaml
# ... and replace it with the new one.
sed -e "/TODO/r $tmpfile" \
-e "s/TODO/ # Stackage Nightly $version/" \
-i pkgs/development/haskell-modules/configuration-hackage2nix.yaml
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