Improve Quantization Setup Prompts and Doc

Author: zhenyan-zhang-meta

docs/quantization.md

@@ -149,6 +149,7 @@ From the torchchat root directory, run
 bash torchchat/utils/scripts/build_torchao_ops.sh
 ```
 
+Note that before running it, you must first clone torchao with `bash torchchat/utils/scripts/clone_torchao.sh` if you have not done so already.
 This should take about 10 seconds to complete.
 
 When building the AOTI and C++ runners, you must pass the flag link_torchao_ops when running the scripts the build the runners.
@@ -161,7 +162,7 @@ bash torchchat/utils/scripts/build_native.sh aoti link_torchao_ops
 bash torchchat/utils/scripts/build_native.sh et link_torchao_ops
 ```
 
-Note before running `bash torchchat/utils/scripts/build_native.sh et link_torchao_ops`, you must first install executorch with `bash torchchat/utils/scripts/install_et.sh` if you have not done so already.
+Note that before running `bash torchchat/utils/scripts/build_native.sh et link_torchao_ops`, you must first install executorch with `bash torchchat/utils/scripts/install_et.sh` if you have not done so already.
 
 ### Examples
 
@@ -218,6 +219,7 @@ From the torchchat root directory, run
 ```
 bash torchchat/utils/scripts/build_torchao_ops.sh mps
 ```
+Note that before running it, you must first clone torchao with `bash torchchat/utils/scripts/clone_torchao.sh` if you have not done so already.
 
 ### Examples
 

torchchat/utils/scripts/build_native.sh

@@ -70,14 +70,14 @@ git submodule sync
 if [[ "$TARGET" == "et" ]]; then
   if [ ! -d "${TORCHCHAT_ROOT}/${ET_BUILD_DIR}/install" ]; then
     echo "Directory ${TORCHCHAT_ROOT}/${ET_BUILD_DIR}/install does not exist."
-    echo "Make sure you run install_executorch_libs"
+    echo "Make sure you run bash torchchat/utils/scripts/install_et.sh"
     exit 1
   fi
 
   if [[ "$LINK_TORCHAO_OPS" == "ON" ]]; then
     if [ ! -d "${TORCHCHAT_ROOT}/torchao-build" ]; then
       echo "Directory ${TORCHCHAT_ROOT}/torchao-build does not exist."
-      echo "Make sure you run clone_torchao"
+      echo "Make sure you run bash torchchat/utils/scripts/clone_torchao.sh"
       exit 1
     fi
 

torchchat/utils/scripts/build_torchao_ops.sh

@@ -12,6 +12,12 @@ if [[ "$device" != "cpu" && "$device" != "mps" ]]; then
   exit 1
 fi
 
+if [ ! -d "${TORCHCHAT_ROOT}/torchao-build" ]; then
+  echo "Directory ${TORCHCHAT_ROOT}/torchao-build does not exist."
+  echo "Make sure you run bash torchchat/utils/scripts/clone_torchao.sh"
+  exit 1
+fi
+
 source "$(dirname "${BASH_SOURCE[0]}")/install_utils.sh"
 
 pushd ${TORCHCHAT_ROOT}