Update build framework script to skip specifying buck executable. (#5985)

Summary:
Pull Request resolved: #5985

.

Reviewed By: dbort

Differential Revision: D64053120

fbshipit-source-id: fc4149ee13130f913f96768a1370ea40ce8ed8b7
(cherry picked from commit f663ba6)

Author: shoumikhin

build/build_apple_frameworks.sh

@@ -11,7 +11,6 @@ SOURCE_ROOT_DIR=""
 OUTPUT="cmake-out"
 MODE="Release"
 TOOLCHAIN=""
-BUCK2=$(which buck2)
 PYTHON=$(which python3)
 FLATC=$(which flatc)
 COREML=OFF
@@ -79,7 +78,6 @@ usage() {
   echo "  --output=DIR         Output directory. Default: 'cmake-out'"
   echo "  --Debug              Use Debug build mode. Default: Uses Release build mode."
   echo "  --toolchain=FILE     Cmake toolchain file. Default: '\$SOURCE_ROOT_DIR/third-party/ios-cmake/ios.toolchain.cmake'"
-  echo "  --buck2=FILE         Buck2 executable path. Default: Path of buck2 found in the current \$PATH"
   echo "  --python=FILE        Python executable path. Default: Path of python3 found in the current \$PATH"
   echo "  --flatc=FILE         FlatBuffers Compiler executable path. Default: Path of flatc found in the current \$PATH"
   echo "  --coreml             Include this flag to build the Core ML backend."
@@ -91,7 +89,7 @@ usage() {
   echo "  --xnnpack            Include this flag to build the XNNPACK backend."
   echo
   echo "Example:"
-  echo "  $0 /path/to/source/root --output=cmake-out --toolchain=/path/to/cmake/toolchain --buck2=/path/to/buck2 --python=/path/to/python3 --coreml --mps --xnnpack"
+  echo "  $0 /path/to/source/root --output=cmake-out --toolchain=/path/to/cmake/toolchain --python=/path/to/python3 --coreml --mps --xnnpack"
   exit 0
 }
 
@@ -101,7 +99,6 @@ for arg in "$@"; do
       --output=*) OUTPUT="${arg#*=}" ;;
       --Debug) MODE="Debug" ;;
       --toolchain=*) TOOLCHAIN="${arg#*=}" ;;
-      --buck2=*) BUCK2="${arg#*=}" ;;
       --python=*) PYTHON="${arg#*=}" ;;
       --flatc=*) FLATC="${arg#*=}" ;;
       --coreml) COREML=ON ;;
@@ -137,7 +134,6 @@ check_command() {
 
 check_command cmake
 check_command rsync
-check_command "$BUCK2"
 check_command "$PYTHON"
 check_command "$FLATC"
 
@@ -157,7 +153,6 @@ cmake_build() {
         -DCMAKE_TOOLCHAIN_FILE="$TOOLCHAIN" \
         -DCMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LANGUAGE_STANDARD="c++17" \
         -DCMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY="libc++" \
-        -DBUCK2="$BUCK2" \
         -DPYTHON_EXECUTABLE="$PYTHON" \
         -DFLATC_EXECUTABLE="$FLATC" \
         -DEXECUTORCH_BUILD_COREML=$COREML \
@@ -189,7 +184,16 @@ echo "Exporting headers"
 
 mkdir -p "$HEADERS_PATH"
 
-"$SOURCE_ROOT_DIR"/build/print_exported_headers.py --buck2="$BUCK2" --targets \
+# Set BUCK2 to the path of the buck2 executable in $OUTPUT/*/buck2-bin/buck2-*
+BUCK2=$(find . -type f -path '*/buck2-bin/buck2-*' | head -n 1)
+if [[ -z "$BUCK2" ]]; then
+  echo "Could not find buck2 executable in any buck2-bin directory under $OUTPUT"
+  BUCK2=$(which buck2)
+fi
+
+check_command "$BUCK2"
+
+"$SOURCE_ROOT_DIR"/build/print_exported_headers.py --buck2=$(realpath "$BUCK2") --targets \
   //extension/module: \
   //extension/tensor: \
 | rsync -av --files-from=- "$SOURCE_ROOT_DIR" "$HEADERS_PATH/executorch"

build/test_ios.sh

@@ -15,9 +15,6 @@ set -e
 
 OUTPUT="${1:-executorch}"
 EXIT_STATUS=0
-BUCK2_RELEASE_DATE="2024-05-15"
-BUCK2_ARCHIVE="buck2-aarch64-apple-darwin.zst"
-BUCK2=".venv/bin/buck2"
 APP_PATH="examples/demo-apps/apple_ios/ExecuTorchDemo/ExecuTorchDemo"
 MODEL_NAME="mv3"
 SIMULATOR_NAME="executorch"
@@ -66,10 +63,6 @@ say "Installing Requirements"
 
 pip install --upgrade cmake pip setuptools wheel zstd
 
-curl -LO "https://github.com/facebook/buck2/releases/download/$BUCK2_RELEASE_DATE/$BUCK2_ARCHIVE"
-zstd -cdq "$BUCK2_ARCHIVE" > "$BUCK2" && chmod +x "$BUCK2"
-rm "$BUCK2_ARCHIVE"
-
 ./install_requirements.sh --pybind coreml mps xnnpack
 export PATH="$(realpath third-party/flatbuffers/cmake-out):$PATH"
 ./build/install_flatc.sh
@@ -99,7 +92,7 @@ curl https://raw.githubusercontent.com/pytorch/hub/master/imagenet_classes.txt \
 
 say "Building Frameworks"
 
-./build/build_apple_frameworks.sh --buck2="$(realpath $BUCK2)" --coreml --custom --mps --optimized --portable --quantized --xnnpack
+./build/build_apple_frameworks.sh --coreml --custom --mps --optimized --portable --quantized --xnnpack
 mv cmake-out "$APP_PATH/Frameworks"
 
 say "Creating Simulator"

docs/source/apple-runtime.md

@@ -108,19 +108,7 @@ source .venv/bin/activate
 pip install --upgrade cmake pip zstd
 ```
 
-5. Install a compatible version of [Buck2](https://buck.build):
-
-```bash
-BUCK2_RELEASE_DATE="2024-05-15"
-BUCK2_ARCHIVE="buck2-aarch64-apple-darwin.zst"
-BUCK2=".venv/bin/buck2"
-
-curl -LO "https://github.com/facebook/buck2/releases/download/$BUCK2_RELEASE_DATE/$BUCK2_ARCHIVE"
-zstd -cdq "$BUCK2_ARCHIVE" > "$BUCK2" && chmod +x "$BUCK2"
-rm "$BUCK2_ARCHIVE"
-```
-
-6. Install the required dependencies, including those needed for the backends like [Core ML](build-run-coreml.md) or [MPS](build-run-mps.md), if you plan to build them as well:
+5. Install the required dependencies, including those needed for the backends like [Core ML](build-run-coreml.md) or [MPS](build-run-mps.md), if you plan to build them as well:
 
 ```bash
 ./install_requirements.sh
@@ -132,7 +120,7 @@ rm "$BUCK2_ARCHIVE"
 ./backends/apple/mps/install_requirements.sh
 ```
 
-7. Use the provided script to build .xcframeworks:
+6. Use the provided script to build .xcframeworks:
 
 ```bash
 ./build/build_apple_frameworks.sh --help
@@ -141,7 +129,7 @@ rm "$BUCK2_ARCHIVE"
 For example, the following invocation will build the ExecuTorch Runtime and all currently available kernels and backends for the Apple platform:
 
 ```bash
-./build/build_apple_frameworks.sh --buck2="$(realpath $BUCK2)" --coreml --custom --mps --optimized --portable --quantized --xnnpack
+./build/build_apple_frameworks.sh --coreml --custom --mps --optimized --portable --quantized --xnnpack
 ```
 
 After the build finishes successfully, the resulting frameworks can be found in the `cmake-out` directory.