| // Copyright 2016 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package com.google.devtools.build.lib.util; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import javax.annotation.Nullable; |
| |
| /** |
| * Provides an external way for the Bazel server to communicate its exit code to the client, when |
| * the main gRPC channel is unavailable because the exit is too abrupt or originated in an async |
| * thread. |
| * |
| * <p>Uses Java 8 {@link Path} objects rather than Bazel ones to avoid depending on the rest of |
| * Bazel. |
| */ |
| public class CustomExitCodePublisher { |
| private static final String EXIT_CODE_FILENAME = "exit_code_to_use_on_abrupt_exit"; |
| @Nullable private static Path abruptExitCodeFilePath = null; |
| |
| public static void setAbruptExitStatusFileDir(String path) { |
| abruptExitCodeFilePath = Paths.get(path).resolve(EXIT_CODE_FILENAME); |
| } |
| |
| public static void maybeWriteExitStatusFile(int exitCode) { |
| if (abruptExitCodeFilePath != null) { |
| try { |
| Files.write( |
| abruptExitCodeFilePath, String.valueOf(exitCode).getBytes(StandardCharsets.UTF_8)); |
| } catch (IOException ioe) { |
| System.err.printf( |
| "io error writing %d to abrupt exit status file %s: %s\n", |
| exitCode, abruptExitCodeFilePath, ioe.getMessage()); |
| } |
| } |
| } |
| } |