From 09eb09b9c50d4f44082a7843b1222bfbaa2d7887 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Sun, 29 Jan 2023 08:37:51 +0100
Subject: [PATCH] pkg-config-data.json: Encode platform support

---
 pkgs/top-level/pkg-config-packages.nix        | 29 +++++++------
 .../top-level/pkg-config/pkg-config-data.json | 42 +++++++++++++++----
 2 files changed, 48 insertions(+), 23 deletions(-)

diff --git a/pkgs/top-level/pkg-config-packages.nix b/pkgs/top-level/pkg-config-packages.nix
index 8d428cfb2182..b5cda4939156 100644
--- a/pkgs/top-level/pkg-config-packages.nix
+++ b/pkgs/top-level/pkg-config-packages.nix
@@ -13,34 +13,33 @@ pkgs:
 let
   inherit (pkgs) lib;
   inherit (lib)
+    all
     flip
     mapAttrs
+    mapAttrsToList
     getAttrFromPath
     importJSON
     ;
 
-  result = modulePkgs // overrides;
-
   data = importJSON ./pkg-config/pkg-config-data.json;
   inherit (data) modules;
 
+  platform = pkgs.stdenv.hostPlatform;
+
+  isSupported = moduleData:
+    moduleData?supportedWhenPlatformAttrsEqual ->
+      all (x: x) (
+        mapAttrsToList
+          (k: v: platform?${k} && platform.${k} == v)
+          moduleData.supportedWhenPlatformAttrsEqual
+      );
+
   modulePkgs = flip mapAttrs modules (_moduleName: moduleData:
-    if moduleData?attrPath then
+    if moduleData?attrPath && isSupported moduleData then
       getAttrFromPath moduleData.attrPath pkgs
     else
       null
   );
 
-  overrides = {
-    hidapi = if pkgs.stdenv.isDarwin then pkgs.hidapi else null;
-    hidapi-hidraw = if pkgs.stdenv.isDarwin then null else pkgs.hidapi;
-    hidapi-libusb = if pkgs.stdenv.isDarwin then null else pkgs.hidapi;
-    libpulse-mainloop-glib = if pkgs.stdenv.isDarwin then null else pkgs.libpulseaudio;
-    wayland-client = if pkgs.stdenv.isDarwin then null else pkgs.wayland;
-    wayland-cursor = if pkgs.stdenv.isDarwin then null else pkgs.wayland;
-    egl = if pkgs.stdenv.isDarwin then null else pkgs.libGL;
-    wayland-server = if pkgs.stdenv.isDarwin then null else pkgs.wayland;
-  };
-
 in
-  result
+  modulePkgs
diff --git a/pkgs/top-level/pkg-config/pkg-config-data.json b/pkgs/top-level/pkg-config/pkg-config-data.json
index 55036d91fce8..c0b6e49b48a0 100644
--- a/pkgs/top-level/pkg-config/pkg-config-data.json
+++ b/pkgs/top-level/pkg-config/pkg-config-data.json
@@ -180,7 +180,10 @@
     "egl": {
       "attrPath": [
         "libGL"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "fftw3": {
       "attrPath": [
@@ -350,17 +353,28 @@
       ]
     },
     "hidapi": {
-      "attrPath": null
+      "attrPath": [
+        "hidapi"
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": true
+      }
     },
     "hidapi-hidraw": {
       "attrPath": [
         "hidapi"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "hidapi-libusb": {
       "attrPath": [
         "hidapi"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "icu-i18n": {
       "attrPath": [
@@ -525,7 +539,10 @@
     "libpulse-mainloop-glib": {
       "attrPath": [
         "libpulseaudio"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "libpulse-simple": {
       "attrPath": [
@@ -811,12 +828,18 @@
     "wayland-client": {
       "attrPath": [
         "wayland"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "wayland-cursor": {
       "attrPath": [
         "wayland"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "wayland-scanner": {
       "attrPath": [
@@ -826,7 +849,10 @@
     "wayland-server": {
       "attrPath": [
         "wayland"
-      ]
+      ],
+      "supportedWhenPlatformAttrsEqual": {
+        "isDarwin": false
+      }
     },
     "webkit2gtk-4.0": {
       "attrPath": [