Automatically use vcpkg to build on macOS and Windows (#4670)

.github/actions/setup-dependencies/macos/action.yml

@@ -44,4 +44,4 @@ runs:
     - name: Setup vcpkg environment
       shell: bash
       run: |
-        echo "CMAKE_TOOLCHAIN_FILE=$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake" >> "$GITHUB_ENV"
+        echo "VCPKG_ROOT=$VCPKG_INSTALLATION_ROOT" >> "$GITHUB_ENV"

.github/actions/setup-dependencies/windows/action.yml

@@ -57,7 +57,7 @@ runs:
       if: ${{ inputs.msystem == '' }}
       shell: bash
       run: |
-        echo "CMAKE_TOOLCHAIN_FILE=$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake" >> "$GITHUB_ENV"
+        echo "VCPKG_ROOT=$VCPKG_INSTALLATION_ROOT" >> "$GITHUB_ENV"
 
     - name: Setup MSYS2 (MinGW)
       if: ${{ inputs.msystem != '' }}

CMakePresets.json

@@ -41,6 +41,9 @@
 				"type": "equals",
 				"lhs": "${hostSystemName}",
 				"rhs": "Darwin"
+			},
+			"cacheVariables": {
+				"CMAKE_TOOLCHAIN_FILE": "$penv{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake"
 			}
 		},
 		{
@@ -50,6 +53,7 @@
 				"macos"
 			],
 			"cacheVariables": {
+				"CMAKE_TOOLCHAIN_FILE": "$penv{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake",
 				"CMAKE_OSX_ARCHITECTURES": "x86_64;arm64",
 				"VCPKG_TARGET_TRIPLET": "universal-osx"
 			}
@@ -76,6 +80,9 @@
 				"type": "equals",
 				"lhs": "${hostSystemName}",
 				"rhs": "Windows"
+			},
+			"cacheVariables": {
+				"CMAKE_TOOLCHAIN_FILE": "$penv{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake"
 			}
 		}
 	],