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nixpkgs/pkgs/common-updater/scripts/mark-broken

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#!/usr/bin/env bash
set -e
scriptName=mark-broken # do not use the .wrapped name
die() {
echo "$scriptName: error: $1" >&2
exit 1
}
usage() {
echo "Usage: $scriptName <attr> [--new-value=<new-value>]"
}
args=()
for arg in "$@"; do
case $arg in
--new-value=*)
newValue="${arg#*=}"
;;
--help)
usage
exit 0
;;
--*)
echo "$scriptName: Unknown argument: $arg"
usage
exit 1
;;
*)
args["${#args[*]}"]=$arg
;;
esac
done
attr=${args[0]}
if (( "${#args[*]}" < 1 )); then
echo "$scriptName: Too few arguments"
usage
exit 1
fi
if (( "${#args[*]}" > 1 )); then
echo "$scriptName: Too many arguments"
usage
exit 1
fi
if [ -z $newValue ]; then
newValue="true"
fi
nixFile=$(nix-instantiate --eval --json -E "with import ./. {}; (builtins.unsafeGetAttrPos \"description\" $attr.meta).file" | jq -r .)
if [[ ! -f "$nixFile" ]]; then
die "Couldn't evaluate 'builtins.unsafeGetAttrPos \"description\" $attr.meta' to locate the .nix file!"
fi
# Insert broken attribute
sed -i.bak "$nixFile" -r \
-e "/^\s*broken\s*=.*$/d" \
-e "s/(\s*)meta\s*=.*\{/&\n\1 broken = $newValue;/"
if cmp -s "$nixFile" "$nixFile.bak"; then
mv "$nixFile.bak" "$nixFile"
die "Failed to mark the package as broken! Does it have a meta attribute?"
fi
if [[ "$newValue" == "true" ]]; then
# broken should evaluate to true in any case now
markedSuccessfully=$(nix-instantiate --eval -E "with import ./. {}; $attr.meta.broken" || true)
if [[ ! "$markedSuccessfully" == "true" ]]; then
mv "$nixFile.bak" "$nixFile"
die "Couldn't verify the broken attribute to be set correctly, restoring backup!"
fi
else
# we can not check if broken evaluates to the correct value, but we can check that it does evaluate
if ! nix-instantiate --eval -E "with import ./. {}; $attr.meta.broken" >/dev/null; then
mv "$nixFile.bak" "$nixFile"
die "Couldn't verify the broken attribute to be set correctly, restoring backup!"
fi
fi
rm -f "$nixFile.bak"
rm -f "$attr.fetchlog"