From f9a7cf528b2369337b1c3f47bd2ecd56d34aa3be Mon Sep 17 00:00:00 2001
From: Reno Dakota <170618376+paparodeo@users.noreply.github.com>
Date: Sat, 27 Jul 2024 12:41:55 +0000
Subject: [PATCH] meson: add support for NIXPKGS_CMAKE_PREFIX_PATH

nixpkgs cmake uses NIXPKGS_CMAKE_PREFIX_PATH rather than
CMAKE_PREFIX_PATH env to specify module search paths. Add the env
variable to meson to allow finding modules via cmake to work.
---
 .../me/meson/000-nixpkgs-cmake-prefix-path.patch     | 12 ++++++++++++
 pkgs/by-name/me/meson/package.nix                    |  3 +++
 2 files changed, 15 insertions(+)
 create mode 100644 pkgs/by-name/me/meson/000-nixpkgs-cmake-prefix-path.patch

diff --git a/pkgs/by-name/me/meson/000-nixpkgs-cmake-prefix-path.patch b/pkgs/by-name/me/meson/000-nixpkgs-cmake-prefix-path.patch
new file mode 100644
index 000000000000..c45106c4f9d1
--- /dev/null
+++ b/pkgs/by-name/me/meson/000-nixpkgs-cmake-prefix-path.patch
@@ -0,0 +1,12 @@
+diff --git a/mesonbuild/dependencies/data/CMakePathInfo.txt b/mesonbuild/dependencies/data/CMakePathInfo.txt
+index 662ec58..4d5f4e4 100644
+--- a/mesonbuild/dependencies/data/CMakePathInfo.txt
++++ b/mesonbuild/dependencies/data/CMakePathInfo.txt
+@@ -5,6 +5,7 @@ list(APPEND TMP_PATHS_LIST ${CMAKE_PREFIX_PATH})
+ list(APPEND TMP_PATHS_LIST ${CMAKE_FRAMEWORK_PATH})
+ list(APPEND TMP_PATHS_LIST ${CMAKE_APPBUNDLE_PATH})
+ list(APPEND TMP_PATHS_LIST $ENV{CMAKE_PREFIX_PATH})
++list(APPEND TMP_PATHS_LIST $ENV{NIXPKGS_CMAKE_PREFIX_PATH})
+ list(APPEND TMP_PATHS_LIST $ENV{CMAKE_FRAMEWORK_PATH})
+ list(APPEND TMP_PATHS_LIST $ENV{CMAKE_APPBUNDLE_PATH})
+ list(APPEND TMP_PATHS_LIST ${CMAKE_SYSTEM_PREFIX_PATH})
diff --git a/pkgs/by-name/me/meson/package.nix b/pkgs/by-name/me/meson/package.nix
index 6c1a9563bf43..820433b51978 100644
--- a/pkgs/by-name/me/meson/package.nix
+++ b/pkgs/by-name/me/meson/package.nix
@@ -31,6 +31,9 @@ python3.pkgs.buildPythonApplication rec {
   };
 
   patches = [
+    # Nixpkgs cmake uses NIXPKGS_CMAKE_PREFIX_PATH for the search path
+    ./000-nixpkgs-cmake-prefix-path.patch
+
     # In typical distributions, RPATH is only needed for internal libraries so
     # meson removes everything else. With Nix, the locations of libraries
     # are not as predictable, therefore we need to keep them in the RPATH.