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Add removeReferencesTo for removing specific refs

This allows for a less blanket approach than nuke-refs, targetting specific
references that we know we don't want rather than all references that we don't
know we want.
nixos-19.03
Linus Heckemann 5 years ago
parent
commit
603b799bcb
  1. 34
      pkgs/build-support/remove-references-to/default.nix
  2. 2
      pkgs/top-level/all-packages.nix

34
pkgs/build-support/remove-references-to/default.nix

@ -0,0 +1,34 @@
# The program `remove-references-to' created by this derivation replaces all
# references to the given Nix store paths in the specified files by a
# non-existent path (/nix/store/eeee...). This is useful for getting rid of
# dependencies that you know are not actually needed at runtime.
{ stdenv, writeScriptBin }:
writeScriptBin "remove-references-to" ''
#! ${stdenv.shell} -e
# References to remove
targets=()
while getopts t: o; do
case "$o" in
t) storeId=$(echo "$OPTARG" | sed -n "s|^$NIX_STORE/\\([a-z0-9]\{32\}\\)-.*|\1|p")
if [ -z "$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 "''${targets[@]}" ; do
sed -i -e "s|$NIX_STORE/$target-|$NIX_STORE/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-|g" "''${regions[@]}"
done
''

2
pkgs/top-level/all-packages.nix

@ -291,6 +291,8 @@ with pkgs;
nukeReferences = callPackage ../build-support/nuke-references/default.nix { };
removeReferencesTo = callPackage ../build-support/remove-references-to/default.nix { };
vmTools = callPackage ../build-support/vm/default.nix { };
releaseTools = callPackage ../build-support/release/default.nix { };

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