Do not require a functional vcpkg during CMake process

Allows to simplify vendoring for offline build. Toolchain configuration
set from build scripts where vcpkg is already used.

internal/frontend/bridge-gui/BridgeSetup.cmake

@@ -53,14 +53,6 @@ endif()
 
 set(VCPKG_ROOT "${BRIDGE_REPO_ROOT}/extern/vcpkg")
 message(STATUS "VCPKG_ROOT is ${VCPKG_ROOT}")
-if (WIN32)
-    find_program(VCPKG_EXE "${VCPKG_ROOT}/vcpkg.exe")
-else()
-    find_program(VCPKG_EXE "${VCPKG_ROOT}/vcpkg")
-endif()
-if (NOT VCPKG_EXE)
-    message(FATAL_ERROR "vcpkg is not installed. Run build.sh (macOS/Linux) or build.ps1 (Windows) first.")
-endif()
 
 # For now we support only a single architecture for macOS (ARM64 or x86_64). We need to investigate how to build universal binaries with vcpkg.
 if (APPLE)
@@ -86,5 +78,3 @@ if  (WIN32)
     message(STATUS "Building for Intel x64 Windows computers")
     set(VCPKG_TARGET_TRIPLET x64-windows)
 endif()
-
-set(CMAKE_TOOLCHAIN_FILE "${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake" CACHE STRING "toolchain")

internal/frontend/bridge-gui/bridge-gui/build.ps1

@@ -63,6 +63,7 @@ $buildDir=(Join-Path $scriptDir "cmake-build-$buildConfig".ToLower())
 $vcpkgRoot = (Join-Path $bridgeRepoRootDir "extern/vcpkg" -Resolve)
 $vcpkgExe = (Join-Path $vcpkgRoot "vcpkg.exe")
 $vcpkgBootstrap = (Join-Path $vcpkgRoot "bootstrap-vcpkg.bat")
+$vcpkgToolchain = (Join-Path $vcpkgRoot "scripts/buildsystems/vcpkg.cmake")
 
 function check_exit() {
     if ($? -ne $True)
@@ -91,6 +92,7 @@ git submodule update --init --recursive $vcpkgRoot
 . $vcpkgExe install sentry-native:x64-windows grpc:x64-windows --clean-after-build
 . $vcpkgExe upgrade --no-dry-run
 . $cmakeExe -G "Visual Studio 17 2022" -DCMAKE_BUILD_TYPE="$buildConfig" `
+                                       -DCMAKE_TOOLCHAIN_FILE="$vcpkgToolchain" `
                                        -DBRIDGE_APP_FULL_NAME="$bridgeFullName" `
                                        -DBRIDGE_VENDOR="$bridgeVendor" `
                                        -DBRIDGE_REVISION="$REVISION_HASH" `

internal/frontend/bridge-gui/bridge-gui/build.sh

@@ -95,6 +95,7 @@ fi
 
 cmake  \
     -DCMAKE_BUILD_TYPE="${BUILD_CONFIG}" \
+    -DCMAKE_TOOLCHAIN_FILE="${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake" \
     -DBRIDGE_APP_FULL_NAME="${BRIDGE_APP_FULL_NAME}" \
     -DBRIDGE_VENDOR="${BRIDGE_VENDOR}" \
     -DBRIDGE_REVISION="${BRIDGE_REVISION}" \