From 77d4a53df26e92c74c531b0047f39cd250dfd75c Mon Sep 17 00:00:00 2001
From: Armel van Ravels <armel@armel.nl>
Date: Fri, 30 Jan 2026 17:22:19 +0100
Subject: [PATCH] Add direnv config

---
 programs/direnv.nix      |  6 +++---
 programs/direnv/direnvrc | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)
 create mode 100644 programs/direnv/direnvrc

diff --git a/programs/direnv.nix b/programs/direnv.nix
index 5cbb80c..0028306 100644
--- a/programs/direnv.nix
+++ b/programs/direnv.nix
@@ -6,8 +6,8 @@
     enableZshIntegration = true;
     nix-direnv.enable = true;
   };
-
-  home.sessionVariables = {
-    DIRENV_CACHE = "${config.home.homeDirectory}/.cache/direnv";
+  
+  home.file.".config/direnv/direnvrc" = {
+    source = ./direnv/direnvrc;
   };
 }
diff --git a/programs/direnv/direnvrc b/programs/direnv/direnvrc
new file mode 100644
index 0000000..d7950e3
--- /dev/null
+++ b/programs/direnv/direnvrc
@@ -0,0 +1,15 @@
+# Place in ~/.config/direnv/direnvrc
+
+# Two things to know:
+# * `direnv_layour_dir` is called once for every {.direnvrc,.envrc} sourced
+# * The indicator for a different direnv file being sourced is a different $PWD value
+# This means we can hash $PWD to get a fully unique cache path for any given environment
+
+: ${XDG_CACHE_HOME:=$HOME/.cache}
+declare -A direnv_layout_dirs
+direnv_layout_dir() {
+	echo "${direnv_layout_dirs[$PWD]:=$(
+		echo -n "$XDG_CACHE_HOME"/direnv/layouts/
+		echo -n "$PWD" | sha1sum | cut -d ' ' -f 1
+	)}"
+}