sh clean.sh script that does cleaning

Let's encapsulate important steps inside this single script for cleaning up.

As next steps, I'd like to restart buck as part of this script.

#7083

.ci/scripts/build_llama_android.sh

@@ -12,7 +12,7 @@ source "$(dirname "${BASH_SOURCE[0]}")/utils.sh"
 
 install_executorch_and_backend_lib() {
   echo "Installing executorch and xnnpack backend"
-  rm -rf cmake-android-out && mkdir cmake-android-out
+  sh clean.sh
   ANDROID_NDK=/opt/ndk
   BUCK2=buck2
   ANDROID_ABI=arm64-v8a

.ci/scripts/test_llama.sh

@@ -143,7 +143,7 @@ which "${PYTHON_EXECUTABLE}"
 
 cmake_install_executorch_libraries() {
     echo "Installing libexecutorch.a, libextension_module.so, libportable_ops_lib.a"
-    rm -rf cmake-out
+    sh clean.sh
     retry cmake \
         -DCMAKE_INSTALL_PREFIX=cmake-out \
         -DCMAKE_BUILD_TYPE="$CMAKE_BUILD_TYPE" \

.ci/scripts/utils.sh

@@ -74,7 +74,7 @@ build_executorch_runner_buck2() {
 build_executorch_runner_cmake() {
   CMAKE_OUTPUT_DIR=cmake-out
   # Build executorch runtime using cmake
-  rm -rf "${CMAKE_OUTPUT_DIR}" && mkdir "${CMAKE_OUTPUT_DIR}"
+  sh clean.sh
 
   pushd "${CMAKE_OUTPUT_DIR}" || return
   # This command uses buck2 to gather source files and buck2 could crash flakily
@@ -103,7 +103,7 @@ build_executorch_runner() {
 
 cmake_install_executorch_lib() {
   echo "Installing libexecutorch.a and libportable_kernels.a"
-  rm -rf cmake-out
+  sh clean.sh
   retry cmake -DBUCK2="$BUCK" \
           -DCMAKE_INSTALL_PREFIX=cmake-out \
           -DCMAKE_BUILD_TYPE=Release \

clean.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree
+
+set -eu
+rm -rf cmake-out pip-out cmake-android-out
+mkdir cmake-out
+mkdir cmake-android-out

docs/source/getting-started-setup.md

@@ -113,7 +113,7 @@ to ExecuTorch.
 >
 > ```bash
 > # From the root of the executorch repo:
-> rm -rf cmake-out pip-out
+> sh clean.sh
 > git submodule sync
 > git submodule update --init
 > ```
@@ -196,7 +196,7 @@ The ExecuTorch repo uses CMake to build its C++ code. Here, we'll configure it t
   ```bash
   # Clean and configure the CMake build system. Compiled programs will
   # appear in the executorch/cmake-out directory we create here.
-  (rm -rf cmake-out && mkdir cmake-out && cd cmake-out && cmake ..)
+  (sh clean.sh && cd cmake-out && cmake ..)
 
   # Build the executor_runner target
   cmake --build cmake-out --target executor_runner -j9
@@ -213,7 +213,7 @@ The ExecuTorch repo uses CMake to build its C++ code. Here, we'll configure it t
 >
 > ```bash
 > # From the root of the executorch repo:
-> rm -rf cmake-out pip-out
+> sh clean.sh
 > git submodule sync
 > git submodule update --init
 > ```

docs/source/runtime-build-and-cross-compilation.md

@@ -45,7 +45,7 @@ cd executorch
 
 # Clean and configure the CMake build system. It's good practice to do this
 # whenever cloning or pulling the upstream repo.
-(rm -rf cmake-out && mkdir cmake-out && cd cmake-out && cmake ..)
+(sh clean.sh && cd cmake-out && cmake ..)
 ```
 
 Once this is done, you don't need to do it again until you pull from the upstream repo again, or if you modify any CMake-related files.
@@ -121,7 +121,7 @@ Following are instruction on how to perform cross compilation for Android and iO
 Assuming Android NDK is available, run:
 ```bash
 # Run the following lines from the `executorch/` folder
-rm -rf cmake-android-out && mkdir cmake-android-out && cd cmake-android-out
+sh clean.sh && cd cmake-android-out
 
 # point -DCMAKE_TOOLCHAIN_FILE to the location where ndk is installed
 cmake -DCMAKE_TOOLCHAIN_FILE=/Users/{user_name}/Library/Android/sdk/ndk/25.2.9519653/build/cmake/android.toolchain.cmake  -DANDROID_ABI=arm64-v8a ..

examples/demo-apps/android/ExecuTorchDemo/README.md

@@ -69,7 +69,8 @@ We build the required ExecuTorch runtime library to run the model.
 export ANDROID_NDK=<path-to-android-ndk>
 export ANDROID_ABI=arm64-v8a
 
-rm -rf cmake-android-out && mkdir cmake-android-out
+# Run the following lines from the `executorch/` folder
+sh clean.sh
 
 # Build the core executorch library
 cmake . -DCMAKE_INSTALL_PREFIX=cmake-android-out \
@@ -112,7 +113,7 @@ export ANDROID_NDK=<path-to-android-ndk>
 export ANDROID_ABI=arm64-v8a
 export QNN_SDK_ROOT=<path-to-qnn-sdk>
 
-rm -rf cmake-android-out && mkdir cmake-android-out && cd cmake-android-out
+sh clean.sh && cd cmake-android-out
 cmake . -DCMAKE_INSTALL_PREFIX=cmake-android-out \
     -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK}/build/cmake/android.toolchain.cmake" \
     -DANDROID_ABI="${ANDROID_ABI}" \

examples/devtools/build_example_runner.sh

@@ -37,7 +37,7 @@ done
 main() {
   cd "${EXECUTORCH_ROOT}"
 
-  rm -rf cmake-out
+  sh clean.sh
 
   if [[ "${BUILD_COREML}" == "ON" ]]; then
     cmake -DCMAKE_INSTALL_PREFIX=cmake-out \

examples/devtools/test_example_runner.sh

@@ -16,7 +16,7 @@ source "$(dirname "${BASH_SOURCE[0]}")/../../.ci/scripts/utils.sh"
 
 cmake_install_executorch_devtools_lib() {
   echo "Installing libexecutorch.a, libportable_kernels.a, libetdump.a, libbundled_program.a"
-  rm -rf cmake-out
+  sh clean.sh
 
   retry cmake -DCMAKE_INSTALL_PREFIX=cmake-out \
           -DCMAKE_BUILD_TYPE=Release \

examples/xnnpack/quantization/test_quantize.sh

@@ -47,8 +47,7 @@ test_cmake_quantization() {
   SITE_PACKAGES="$(${PYTHON_EXECUTABLE} -c 'from distutils.sysconfig import get_python_lib; print(get_python_lib())')"
   CMAKE_PREFIX_PATH="${SITE_PACKAGES}/torch"
 
-  (rm -rf cmake-out \
-    && mkdir cmake-out \
+  (sh clean.sh \
     && cd cmake-out \
     && retry cmake \
       -DCMAKE_BUILD_TYPE=Release \

test/build_size_test.sh

@@ -13,7 +13,7 @@ source "$(dirname "${BASH_SOURCE[0]}")/../.ci/scripts/utils.sh"
 
 cmake_install_executorch_lib() {
   echo "Installing libexecutorch.a"
-  rm -rf cmake-out
+  sh clean.sh
 
   retry cmake -DBUCK2="$BUCK2" \
           -DCMAKE_CXX_STANDARD_REQUIRED=ON \