[libigl] Always install as header-only library (#14888)

* [libigl] Always build as header-only library

* [libigl] Always build header-only

Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>
Co-authored-by: Robert Schumacher <roschuma@microsoft.com>

ports/libigl/CONTROL

@@ -1,6 +1,6 @@
 Source: libigl
 Version: 2.2.0
-Port-Version: 3
+Port-Version: 4
 Homepage: https://github.com/libigl/libigl
 Description: libigl is a simple C++ geometry processing library. We have a wide functionality including construction of sparse discrete differential geometry operators and finite-elements matrices such as the cotangent Laplacian and diagonalized mass matrix, simple facet and edge-based topology data structures, mesh-viewing utilities for OpenGL and GLSL, and many core functions for matrix manipulation which make Eigen feel a lot more like MATLAB.
 Build-Depends: eigen3
@@ -16,11 +16,11 @@ Build-Depends: opengl, glad
 
 Feature: glfw
 Description: Build with glfw
-Build-Depends: libigl[opengl], glfw3
+Build-Depends: libigl[core, opengl], glfw3
 
 Feature: imgui
 Description: Build with imgui
-Build-Depends: libigl[glfw], imgui[glfw-binding, opengl3-glew-binding, libigl-imgui]
+Build-Depends: libigl[core, glfw], imgui[core, glfw-binding, opengl3-glew-binding, libigl-imgui]
 
 Feature: xml
 Description: Build with libxml

ports/libigl/portfile.cmake

@@ -13,23 +13,6 @@ vcpkg_from_github(
         fix-config.patch
 )
 
-set(LIBIGL_BUILD_STATIC OFF)
-if (VCPKG_LIBRARY_LINKAGE STREQUAL static)
-    set(LIBIGL_BUILD_STATIC ON)
-endif()
-
-if ("test" IN_LIST FEATURES AND NOT EXISTS ${SOURCE_PATH}/tests/data)
-    set(TEST_SOURCE_PATH ${SOURCE_PATH}/tests/data)
-    file(MAKE_DIRECTORY ${TEST_SOURCE_PATH})
-    vcpkg_from_github(
-        OUT_SOURCE_PATH ${TEST_SOURCE_PATH}
-        REPO libigl/libigl-tests-data
-        REF  0689abc55bc12825e6c01ac77446f742839ff277
-        SHA512 2b6aec21ed39a9fd534da86fff75eee0f94a3ea2db2fb9dd28974636cc34936341cc28dfcf3bb07cf79409124342717e001c529dc887da72c85fe314b0eb6ea6
-        HEAD_REF master
-    )
-endif()
-
 vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
     embree LIBIGL_WITH_EMBREE
     opengl LIBIGL_WITH_OPENGL
@@ -46,7 +29,7 @@ vcpkg_configure_cmake(
     OPTIONS ${FEATURE_OPTIONS}
         -DLIBIGL_BUILD_PYTHON=OFF
         -DLIBIGL_EXPORT_TARGETS=ON
-        -DLIBIGL_USE_STATIC_LIBRARY=${LIBIGL_BUILD_STATIC}
+        -DLIBIGL_USE_STATIC_LIBRARY=OFF # Header-only mode
         -DLIBIGL_WITH_COMISO=OFF
         -DLIBIGL_WITH_TETGEN=OFF
         -DLIBIGL_WITH_TRIANGLE=OFF
@@ -62,10 +45,7 @@ vcpkg_install_cmake()
 vcpkg_fixup_cmake_targets(CONFIG_PATH share/libigl/cmake)
 vcpkg_copy_pdbs()
 
-if (NOT LIBIGL_BUILD_STATIC)
-    # For dynamic build, libigl is a header-only library.
-    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug)
-endif()
-file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include ${CURRENT_PACKAGES_DIR}/debug/share)
+# libigl is a header-only library.
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug)
 
 file(INSTALL ${SOURCE_PATH}/LICENSE.GPL DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)

versions/baseline.json

@@ -3074,7 +3074,7 @@
     },
     "libigl": {
       "baseline": "2.2.0",
-      "port-version": 3
+      "port-version": 4
     },
     "libilbc": {
       "baseline": "3.0.3",

versions/l-/libigl.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "d150e0cc468dec8769382b413a5c477a0682f1fd",
+      "version-string": "2.2.0",
+      "port-version": 4
+    },
     {
       "git-tree": "b953afc0875516000dd3c3e694b0d1fc788b8e19",
       "version-string": "2.2.0",