From 7dccaa90e5dcf4c57848e6198ffd7abbafff3b7f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9ana=20=E6=B1=9F?= <leana.jiang+git@icloud.com>
Date: Thu, 29 May 2025 22:27:45 +0200
Subject: [PATCH] packages/nix-which: init

---
 nix/packages/by-name/nix-which/package.nix | 27 ++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 nix/packages/by-name/nix-which/package.nix

diff --git a/nix/packages/by-name/nix-which/package.nix b/nix/packages/by-name/nix-which/package.nix
new file mode 100644
index 00000000..896ab411
--- /dev/null
+++ b/nix/packages/by-name/nix-which/package.nix
@@ -0,0 +1,27 @@
+{
+  writeShellApplication,
+  which,
+  lib,
+}: let
+  # Use this to not pollute the PATH inside
+  # Otherwise nix-which which will be an edge case
+  whichExe = "${lib.getExe which}";
+in
+  writeShellApplication {
+    name = "nix-which";
+    text = ''
+      if [ "$#" -ne 1 ]; then
+          echo "Must provide exactly one argument, the package to be dereferenced"
+          exit 1
+      fi
+      target="$1"
+
+      target="$(${whichExe} "$target")"
+      echo "==> $target"
+
+      while [ -L "$target" ]; do
+          target="$(readlink "$target")"
+          echo "==> $target"
+      done
+    '';
+  }