push sheeet

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

@@ -0,0 +1,35 @@
+# 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.
+
+{
+  lib,
+  stdenvNoCC,
+  signingUtils,
+  shell ? stdenvNoCC.shell,
+}:
+
+stdenvNoCC.mkDerivation {
+  name = "remove-references-to";
+
+  dontUnpack = true;
+  dontConfigure = true;
+  dontBuild = true;
+
+  installPhase = ''
+    mkdir -p $out/bin
+    substituteAll ${./remove-references-to.sh} $out/bin/remove-references-to
+    chmod a+x $out/bin/remove-references-to
+  '';
+
+  env = {
+    inherit (builtins) storeDir;
+    shell = lib.getBin shell + (shell.shellPath or "");
+    signingUtils = lib.optionalString (
+      stdenvNoCC.targetPlatform.isDarwin && stdenvNoCC.targetPlatform.isAarch64
+    ) signingUtils;
+  };
+
+  meta.mainProgram = "remove-references-to";
+}

pkgs/build-support/remove-references-to/remove-references-to.sh

@@ -0,0 +1,34 @@
+#! @shell@ -e
+
+fixupHooks=()
+
+# 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" "${regions[@]}"
+done
+
+if [[ -n "@signingUtils@" ]]; then
+    source "@signingUtils@"
+    for region in "${regions[@]}"; do
+        signIfRequired "$region"
+    done
+fi