added build script for xcframework

Author: swittk

.gitignore

@@ -4,4 +4,5 @@ mediapipe/MediaPipe.tulsiproj/*.tulsiconf-user
 mediapipe/provisioning_profile.mobileprovision
 .configure.bazelrc
 .user.bazelrc
-.DS_STORE
+.DS_STORE
+/frameworkbuild

BUILD_FACE_MESH_XCFRAMEWORK.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+# Create output directories~
+mkdir -p ./frameworkbuild/FaceMeshIOSLibFramework/arm64
+mkdir -p ./frameworkbuild/FaceMeshIOSLibFramework/x86_64
+# XCFramework is how we're going to use it.
+mkdir -p ./frameworkbuild/FaceMeshIOSLibFramework/xcframework
+
+# Interesting fact. Bazel `build` command stores cached files in `/private/var/tmp/...` folders
+# and when you run build, if it finds cached files, it kind of symlinks the files/folders
+# into the `bazel-bin` folder found in the project root. So don't be afraid of re-running builds
+# because the files are cached.
+
+# build the arm64 binary framework
+bazel build --copt=-fembed-bitcode --apple_bitcode=embedded --config=ios_arm64 mediapipe/examples/ios/facemeshioslib:FaceMeshIOSLibFramework
+
+# The arm64 framework zip will be located at //bazel-bin/mediapipe/examples/ios/facemeshioslib/FaceMeshIOSLibFramework.zip
+
+# Call the framework patcher (First argument = compressed framework.zip, Second argument = header file's name(in this case FaceMeshIOSLib.h))
+./mediapipe/examples/ios/facemeshioslib/patch_ios_framework.sh ./bazel-bin/mediapipe/examples/ios/facemeshioslib/FaceMeshIOSLibFramework.zip FaceMeshIOSLib.h
+
+# There will be a resulting patched .framework folder at the same directory, this is our arm64 one, we copy it to our arm64 folder
+cp -a ./bazel-bin/mediapipe/examples/ios/facemeshioslib/FaceMeshIOSLibFramework.framework ./frameworkbuild/FaceMeshIOSLibFramework/arm64
+
+# Do the same for x86_64
+
+# build x86_64
+bazel build --copt=-fembed-bitcode --apple_bitcode=embedded --config=ios_x86_64 mediapipe/examples/ios/facemeshioslib:FaceMeshIOSLibFramework
+
+# Call the framework patcher
+./mediapipe/examples/ios/facemeshioslib/patch_ios_framework.sh ./bazel-bin/mediapipe/examples/ios/facemeshioslib/FaceMeshIOSLibFramework.zip FaceMeshIOSLib.h
+
+# copy the patched framework to our folder
+cp -a ./bazel-bin/mediapipe/examples/ios/facemeshioslib/FaceMeshIOSLibFramework.framework ./frameworkbuild/FaceMeshIOSLibFramework/x86_64
+
+# Create xcframework (because the classic lipo method with normal .framework no longer works (shows Building for iOS Simulator, but the linked and embedded framework was built for iOS + iOS Simulator))
+
+xcodebuild -create-xcframework \
+  -framework ./frameworkbuild/FaceMeshIOSLibFramework/x86_64/FaceMeshIOSLibFramework.framework \
+  -framework ./frameworkbuild/FaceMeshIOSLibFramework/arm64/FaceMeshIOSLibFramework.framework \
+  -output ./frameworkbuild/FaceMeshIOSLibFramework/xcframework/FaceMeshIOSLibFramework.xcframework
+