no-broken-symlinks: guard against double inclusions

NixOS · Jan 18, 2025 · 865fa50 · 865fa50
1 parent 238c85f
commit 865fa50
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/pkgs/build-support/setup-hooks/no-broken-symlinks.sh b/pkgs/build-support/setup-hooks/no-broken-symlinks.sh
@@ -1,4 +1,12 @@
 # shellcheck shell=bash
+
+# Guard against double inclusion.
+if (("${noBrokenSymlinksHookInstalled:-0}" > 0)); then
+  nixInfoLog "skipping because the hook has been propagated more than once"
+  return 0
+fi
+declare -ig noBrokenSymlinksHookInstalled=1
+
 # symlinks are often created in postFixup
 # don't use fixupOutputHooks, it is before postFixup
 postFixupHooks+=(noBrokenSymlinksInAllOutputs)