From b7d097438b9b0f782a707f3295d320d824810864 Mon Sep 17 00:00:00 2001
From: Adam Joseph <adam@westernsemico.com>
Date: Sat, 24 Sep 2022 22:00:46 -0700
Subject: lib/meta.nix: platformMatch: allow predicate functions

---
 lib/meta.nix | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'lib/meta.nix')

diff --git a/lib/meta.nix b/lib/meta.nix
index 62894aeb316b4..cdd3e1d596c03 100644
--- a/lib/meta.nix
+++ b/lib/meta.nix
@@ -78,10 +78,15 @@ rec {
 
        2. (modern) a pattern for the platform `parsed` field.
 
+       3. (functional) a predicate function returning a boolean.
+
      We can inject these into a pattern for the whole of a structured platform,
      and then match that.
   */
-  platformMatch = platform: elem: let
+  platformMatch = platform: elem:
+    if builtins.isFunction elem
+    then elem platform
+    else let
       pattern =
         if builtins.isString elem
         then { system = elem; }
-- 
cgit 1.4.1