From fc80de87685515edc6bc8ace4934be2c551f374b Mon Sep 17 00:00:00 2001
From: Antoine Carnec <antoinecarnec@gmail.com>
Date: Sun, 13 Nov 2022 15:50:33 +0000
Subject: [PATCH] fix: Added type check for packagesDir option

---
 src/modules/config/interface.nix | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/modules/config/interface.nix b/src/modules/config/interface.nix
index 3695f655..7ce6c4f6 100644
--- a/src/modules/config/interface.nix
+++ b/src/modules/config/interface.nix
@@ -1,6 +1,16 @@
 {lib, ...}: let
   l = lib // builtins;
   t = l.types;
+
+  relativePathString = l.types.mkOptionType {
+    name = "relativePathString";
+    description = "Relative path in a string.";
+    check = s:
+      (t.str.check s)
+      && (l.substring 0 2 s == "./");
+    descriptionClass = "noun";
+    inherit (t.str) merge;
+  };
 in {
   options = {
     disableIfdWarning = l.mkOption {
@@ -18,7 +28,7 @@ in {
       '';
     };
     packagesDir = l.mkOption {
-      type = t.str;
+      type = relativePathString;
       default = "./dream2nix-packages";
       description = ''
         Relative path to the project root to put generated dream-lock files in.