add `bundle_metal` and `cleanup_metal` funtions to `gen_darwin.sh`

llm/generate/gen_darwin.sh

@@ -18,6 +18,19 @@ sign() {
     fi
 }
 
+# bundle_metal bundles ggml-common.h and ggml-metal.metal into a single file
+bundle_metal() {
+    grep -v '#include "ggml-common.h"' "${LLAMACPP_DIR}/ggml-metal.metal" | grep -v '#pragma once' > "${LLAMACPP_DIR}/ggml-metal.metal.temp"
+    echo '#define GGML_COMMON_IMPL_METAL' > "${LLAMACPP_DIR}/ggml-metal.metal"
+    cat "${LLAMACPP_DIR}/ggml-common.h" | grep -v '#pragma once' >> "${LLAMACPP_DIR}/ggml-metal.metal"
+    cat  "${LLAMACPP_DIR}/ggml-metal.metal.temp" >> "${LLAMACPP_DIR}/ggml-metal.metal"
+    rm "${LLAMACPP_DIR}/ggml-metal.metal.temp"
+}
+
+cleanup_metal() {
+    (cd ${LLAMACPP_DIR} && git checkout ggml-metal.metal)
+}
+
 COMMON_DARWIN_DEFS="-DCMAKE_OSX_DEPLOYMENT_TARGET=11.0 -DCMAKE_SYSTEM_NAME=Darwin"
 
 case "${GOARCH}" in
@@ -60,19 +73,14 @@ case "${GOARCH}" in
     compress_libs
     ;;
 "arm64")
-    # bundle ggml-common.h and ggml-metal.metal into a single file
-    grep -v '#include "ggml-common.h"' "${LLAMACPP_DIR}/ggml-metal.metal" | grep -v '#pragma once' > "${LLAMACPP_DIR}/ggml-metal.metal.temp"
-    echo '#define GGML_COMMON_IMPL_METAL' > "${LLAMACPP_DIR}/ggml-metal.metal"
-    cat "${LLAMACPP_DIR}/ggml-common.h" | grep -v '#pragma once' >> "${LLAMACPP_DIR}/ggml-metal.metal"
-    cat  "${LLAMACPP_DIR}/ggml-metal.metal.temp" >> "${LLAMACPP_DIR}/ggml-metal.metal"
-    rm "${LLAMACPP_DIR}/ggml-metal.metal.temp"
     CMAKE_DEFS="${COMMON_DARWIN_DEFS} -DLLAMA_METAL_EMBED_LIBRARY=on -DLLAMA_ACCELERATE=on -DCMAKE_SYSTEM_PROCESSOR=${ARCH} -DCMAKE_OSX_ARCHITECTURES=${ARCH} -DLLAMA_METAL=on ${CMAKE_DEFS}"
     BUILD_DIR="${LLAMACPP_DIR}/build/darwin/${ARCH}/metal"
     EXTRA_LIBS="${EXTRA_LIBS} -framework Accelerate -framework Foundation -framework Metal -framework MetalKit -framework MetalPerformanceShaders"
+    bundle_metal
     build
     sign ${LLAMACPP_DIR}/build/darwin/${ARCH}/metal/lib/libext_server.dylib
     compress_libs
-    (cd ${LLAMACPP_DIR} && git checkout ggml-metal.metal)
+    cleanup_metal
     ;;
 *)
     echo "GOARCH must be set"