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nixpkgs/pkgs/build-support/remove-references-to/remove-references-to.sh
Naïm Favier 3c697db972
removeReferencesTo: kill lone hashes
Nix counts any occurrence of a store path's *hash* as a reference, even
without a store directory prefix. The current version only kills
references of the form `/nix/store/<hash>-`, which can fail e.g. for
compressed files.
2022-08-25 17:25:58 +02:00

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#! @shell@ -e
fixupHooks=()
if [ -e @out@/nix-support/setup-hooks.sh ]; then
source @out@/nix-support/setup-hooks.sh
fi
# References to remove
targets=()
while getopts t: o; do
case "$o" in
t) storeId=$(echo "$OPTARG" | sed -n "s|^@storeDir@/\\([a-z0-9]\{32\}\\)-.*|\1|p")
if [ -z "$storeId" ]; then
echo "-t argument must be a Nix store path"
exit 1
fi
targets+=("$storeId")
esac
done
shift $(($OPTIND-1))
# Files to remove the references from
regions=()
for i in "$@"; do
test ! -L "$i" -a -f "$i" && regions+=("$i")
done
for target in "${targets[@]}" ; do
sed -i -e "s|$target|eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee|g" "${regions[@]}"
done
for region in "${regions[@]}"; do
for hook in "${fixupHooks[@]}"; do
eval "$hook" "$i"
done
done