Move to explicitly setting CMake toolchain file

CMakeLists.txt

@@ -9,12 +9,6 @@ endif ()
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
-option(GAP_ENABLE_VCPKG ON)
-
-if (GAP_ENABLE_VCPKG)
-  include(vcpkg_setup)
-endif()
-
 project(
   gap
   LANGUAGES C CXX
@@ -219,7 +213,6 @@ if (GAP_INSTALL)
 
   install(FILES
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/compiler_warnings.cmake"
-    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/vcpkg_setup.cmake"
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/sanitizers.cmake"
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/static_analyzers.cmake"
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/project_settings.cmake"

CMakePresets.json

@@ -20,7 +20,7 @@
       "description": "Configure with vcpkg toolchain",
       "binaryDir": "${sourceDir}/builds/${presetName}",
       "generator": "Ninja Multi-Config",
-      "toolchainFile": "$env{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake",
+      "toolchainFile": "$env{CMAKE_TOOLCHAIN_FILE}",
       "installDir": "~/opt/gap",
       "cacheVariables": {
         "CMAKE_CONFIGURATION_TYPES": "Release;RelWithDebInfo;Debug"

DockerFile

@@ -23,7 +23,6 @@ WORKDIR /opt/vcpkg
 
 RUN ./bootstrap-vcpkg.sh && ./vcpkg integrate install && \
     ./vcpkg integrate bash && \
-    echo 'export PATH=$PATH:/opt/vcpkg' >>~/.bashrc \
-    echo 'export VCPKG_ROOT=/opt/vcpkg' >>~/.bashrc
+    echo 'export PATH=$PATH:/opt/vcpkg' >>~/.bashrc
 
 WORKDIR /root