feat(ios,android): setup uniffi infra (#8828)

packages/frontend/apps/ios/App/xc-universal-binary.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+set -eEuvx
+
+function error_help()
+{
+    ERROR_MSG="It looks like something went wrong building the Universal Binary."
+    echo "error: ${ERROR_MSG}"
+}
+trap error_help ERR
+
+# XCode tries to be helpful and overwrites the PATH. Reset that.
+PATH="$(bash -l -c 'echo $PATH')"
+
+# This should be invoked from inside xcode, not manually
+if [[ "${#}" -ne 3 ]]
+then
+    echo "Usage (note: only call inside xcode!):"
+    echo "path/to/build-scripts/xc-universal-binary.sh <FFI_TARGET> <SRC_ROOT_PATH> <buildvariant>"
+    exit 1
+fi
+# what to pass to cargo build -p, e.g. logins_ffi
+FFI_TARGET=${1}
+# path to source code root
+SRC_ROOT=${2}
+# buildvariant from our xcconfigs
+BUILDVARIANT=$(echo "${3}" | tr '[:upper:]' '[:lower:]')
+
+RELFLAG=
+if [[ "${BUILDVARIANT}" != "debug" ]]; then
+    RELFLAG=release
+else
+    RELFLAG=debug
+fi
+
+if [[ -n "${SDK_DIR:-}" ]]; then
+  # Assume we're in Xcode, which means we're probably cross-compiling.
+  # In this case, we need to add an extra library search path for build scripts and proc-macros,
+  # which run on the host instead of the target.
+  # (macOS Big Sur does not have linkable libraries in /usr/lib/.)
+  export LIBRARY_PATH="${SDK_DIR}/usr/lib:${LIBRARY_PATH:-}"
+fi
+
+IS_SIMULATOR=0
+if [ "${LLVM_TARGET_TRIPLE_SUFFIX-}" = "-simulator" ]; then
+  IS_SIMULATOR=1
+fi
+
+for arch in $ARCHS; do
+  case "$arch" in
+    x86_64)
+      if [ $IS_SIMULATOR -eq 0 ]; then
+        echo "Building for x86_64, but not a simulator build. What's going on?" >&2
+        exit 2
+      fi
+
+      # Intel iOS simulator
+      export CFLAGS_x86_64_apple_ios="-target x86_64-apple-ios"
+      $HOME/.cargo/bin/cargo rustc -p "${FFI_TARGET}" --lib --crate-type staticlib --$RELFLAG --target x86_64-apple-ios
+      ;;
+
+    arm64)
+      if [ $IS_SIMULATOR -eq 0 ]; then
+        # Hardware iOS targets
+        $HOME/.cargo/bin/cargo rustc -p "${FFI_TARGET}" --lib --crate-type staticlib --$RELFLAG --target aarch64-apple-ios
+        cp $SRC_ROOT/../../../target/aarch64-apple-ios/${RELFLAG}/lib${FFI_TARGET}.a $SRCROOT/lib${FFI_TARGET}.a
+      else
+        # M1 iOS simulator
+        $HOME/.cargo/bin/cargo rustc -p "${FFI_TARGET}" --lib --crate-type staticlib --$RELFLAG --target aarch64-apple-ios-sim
+        cp $SRC_ROOT/../../../target/aarch64-apple-ios-sim/${RELFLAG}/lib${FFI_TARGET}.a $SRCROOT/lib${FFI_TARGET}.a
+      fi
+  esac
+done
+
+$HOME/.cargo/bin/cargo run --bin uniffi-bindgen generate --library $SRCROOT/lib${FFI_TARGET}.a --language swift --out-dir $SRCROOT/../../ios/App/App/uniffi