Fix macOS ARM CI: build libcef_dll_wrapper for native arch

automate.py hardcoded -DPROJECT_ARCH=x86_64 when building
libcef_dll_wrapper.a on macOS, producing an x86_64 static lib even
on Apple Silicon runners. Replace with platform.machine() so the
wrapper is compiled for the actual host architecture (arm64 or x86_64).

Also fix a shell bug in the CI arch-verify step where (exit 1) ran
in a subshell and didn't actually fail the step, and bump the cache
key to v3 to evict the x86_64 wrapper cached by the v2 run.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: linesight

.github/workflows/ci-macos.yml

@@ -48,7 +48,7 @@ jobs:
           path: |
             build/cef_binary_*
             build/cef*_macarm64
-          key: cef-macosarm64-v2-${{ steps.cef-version.outputs.value }}
+          key: cef-macosarm64-v3-${{ steps.cef-version.outputs.value }}
 
       - name: Install build tools
         run: python tools/requirements.py
@@ -65,7 +65,7 @@ jobs:
           if [ -z "$wrapper" ]; then echo "libcef_dll_wrapper.a not found"; exit 1; fi
           archs=$(lipo -info "$wrapper" 2>&1)
           echo "$archs"
-          echo "$archs" | grep -q arm64 || (echo "ERROR: libcef_dll_wrapper.a is not arm64"; exit 1)
+          echo "$archs" | grep -q arm64 || { echo "ERROR: libcef_dll_wrapper.a is not arm64"; exit 1; }
 
       - name: Configure CMake
         run: cmake -S . -B build/_cmake_build -G Ninja -DCMAKE_BUILD_TYPE=Release

tools/automate.py

@@ -621,9 +621,10 @@ def build_wrapper_library_mac():
     # On Mac it is required to link libcef_dll_wrapper against
     # libc++ library, so must build this library separately
     # from cefclient.
+    mac_arch = platform.machine()  # "arm64" or "x86_64"
     cmake_wrapper = prepare_build_command()
     cmake_wrapper.extend(["cmake", "-G", "Ninja",
-                          "-DPROJECT_ARCH=x86_64",
+                          "-DPROJECT_ARCH=" + mac_arch,
                           "-DCMAKE_CXX_FLAGS=-stdlib=libc++",
                           "-DCMAKE_BUILD_TYPE=" + Options.build_type,
                           ".."])