Add macos/ios app using rust lib

FastCoster/CosterRs/create-lib.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+
+#  create-lib.sh
+#  FastCoster
+#
+#  Created by Michael Pivato on 3/2/2023.
+#  
+
+set -x
+# create-iospw.sh
+# Build the correct Rust target and place
+# the resulting library in the build products
+#
+# The $PATH used by Xcode likely won't contain Cargo, fix that.
+# In addition, the $PATH used by XCode has lots of Apple-specific
+# developer tools that your Cargo isn't expecting to use, fix that.
+# Note: This assumes a default `rustup` setup and default path.
+build_path="$HOME/.cargo/bin:/usr/local/bin:/usr/bin:/bin"
+#
+# Figure out the correct Rust target from the ARCHS and PLATFORM.
+# This script expects just one element in ARCHS.
+case "$ARCHS" in
+    "arm64")    rust_arch="aarch64" ;;
+    "x86_64")    rust_arch="x86_64" ;;
+    *)            echo "error: unsupported architecture: $ARCHS" ;;
+esac
+if [[ "$PLATFORM_NAME" == "macosx" ]]; then
+    rust_platform="apple-darwin"
+else
+    rust_platform="apple-ios"
+fi
+if [[ "$PLATFORM_NAME" == "iphonesimulator" ]]; then
+    if [[ "${rust_arch}" == "aarch64" ]]; then
+        rust_abi="-sim"
+    else
+        rust_abi=""
+    fi
+else
+    rust_abi=""
+fi
+rust_target="${rust_arch}-${rust_platform}${rust_abi}"
+#
+# Build library in debug or release
+build_args=(--manifest-path ../costerrs/Cargo.toml --target "${rust_target}")
+if [[ "$CONFIGURATION" == "Release" ]]; then
+    rust_config="release"
+    env PATH="${build_path}" cargo build --release "${build_args[@]}"
+elif [[ "$CONFIGURATION" == "Debug" ]]; then
+    rust_config="release"
+    env PATH="${build_path}" cargo build --release "${build_args[@]}"
+else
+    echo "error: Unexpected build configuration: $CONFIGURATION"
+fi
+#
+# Copy the built library to the derived files directory
+cp -v "../costerrs/target/${rust_target}/${rust_config}/libcoster_rs.a" ${DERIVED_FILES_DIR}