From 126accfce1df6aa774f2554b3ea730f162d19594 Mon Sep 17 00:00:00 2001
From: Dan Lipsa <dan.lipsa@kitware.com>
Date: Wed, 8 Feb 2023 11:00:14 -0500
Subject: [PATCH] Fix external freetype that provides freetype-config.cmake
 (#35363)

* Fix external freetype that provides freetype-config.cmake

---------

Co-authored-by: Dan Lipsa <dan.lipsa@khq.kitware.com>
---
 .../paraview/FindFreetype.cmake.patch         | 35 +++++++++++++++++++
 .../builtin/packages/paraview/package.py      |  3 ++
 2 files changed, 38 insertions(+)
 create mode 100644 var/spack/repos/builtin/packages/paraview/FindFreetype.cmake.patch

diff --git a/var/spack/repos/builtin/packages/paraview/FindFreetype.cmake.patch b/var/spack/repos/builtin/packages/paraview/FindFreetype.cmake.patch
new file mode 100644
index 00000000000..ebb5f7c29c9
--- /dev/null
+++ b/var/spack/repos/builtin/packages/paraview/FindFreetype.cmake.patch
@@ -0,0 +1,35 @@
+diff --git a/VTK/CMake/FindFreetype.cmake b/VTK/CMake/FindFreetype.cmake
+index b4532735c2..f06d32327e 100644
+--- a/VTK/CMake/FindFreetype.cmake
++++ b/VTK/CMake/FindFreetype.cmake
+@@ -63,6 +63,30 @@ directory of a Freetype installation.
+ # I'm going to attempt to cut out the middleman and hope
+ # everything still works.
+ 
++find_package(freetype CONFIG) # foward `QUIET`, version, and components here, but not `REQUIRED`
++if (freetype_FOUND)
++  if (NOT TARGET Freetype::Freetype)
++    # make target chain to target from config mode
++    get_target_property(freetype_library_type freetype TYPE)
++    get_target_property(freetype_location freetype LOCATION)
++    if (freetype_library_type STREQUAL STATIC_LIBRARY)
++      set(freetype_library_type STATIC)
++    endif()
++    get_target_property(freetype_interface_include_directories freetype INTERFACE_INCLUDE_DIRECTORIES)
++    get_target_property(freetype_interface_link_libraries freetype INTERFACE_LINK_LIBRARIES)
++    add_library(Freetype::Freetype "${freetype_library_type}" IMPORTED)
++    set_target_properties(Freetype::Freetype PROPERTIES
++      INTERFACE_INCLUDE_DIRECTORIES "${freetype_interface_include_directories}"
++      INTERFACE_LINK_LIBRARIES "${freetype_interface_link_libraries}"
++      IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
++      IMPORTED_LOCATION "${freetype_location}")
++  endif ()
++  set(FREETYPE_INCLUDE_DIRS "${freetype_interface_include_directories}")
++  set(FREETYPE_LIBRARIES "${freetype_interface_link_libraries}")
++  set(Freetype_FOUND 1) # might need to also forward the version found
++  return ()
++endif ()
++
+ set(FREETYPE_FIND_ARGS
+   HINTS
+     ENV FREETYPE_DIR
diff --git a/var/spack/repos/builtin/packages/paraview/package.py b/var/spack/repos/builtin/packages/paraview/package.py
index e3401ec4acb..702f9b800c0 100644
--- a/var/spack/repos/builtin/packages/paraview/package.py
+++ b/var/spack/repos/builtin/packages/paraview/package.py
@@ -273,6 +273,9 @@ class Paraview(CMakePackage, CudaPackage, ROCmPackage):
     patch("vtk-xdmf2-hdf51.13.1.patch", when="@5.10.0:5.10")
     patch("vtk-xdmf2-hdf51.13.2.patch", when="@5.10:")
 
+    # Fix VTK to work with external freetype using CONFIG mode for find_package
+    patch("FindFreetype.cmake.patch", when="@5.10.1:")
+
     @property
     def generator(self):
         # https://gitlab.kitware.com/paraview/paraview/-/issues/21223