1 files changed, 111 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/standalone/LocalSpawnStrategy.java b/src/main/java/com/google/devtools/build/lib/standalone/LocalSpawnStrategy.java
new file mode 100644
index 0000000000..fc2387c896
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/standalone/LocalSpawnStrategy.java
@@ -0,0 +1,111 @@
+// Copyright 2014 Google Inc. 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.standalone;
+
+import com.google.devtools.build.lib.actions.ActionExecutionContext;
+import com.google.devtools.build.lib.actions.ExecException;
+import com.google.devtools.build.lib.actions.ExecutionStrategy;
+import com.google.devtools.build.lib.actions.Executor;
+import com.google.devtools.build.lib.actions.Spawn;
+import com.google.devtools.build.lib.actions.SpawnActionContext;
+import com.google.devtools.build.lib.actions.UserExecException;
+import com.google.devtools.build.lib.shell.Command;
+import com.google.devtools.build.lib.shell.CommandException;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.lib.util.CommandFailureUtils;
+import com.google.devtools.build.lib.util.OS;
+import com.google.devtools.build.lib.util.OsUtils;
+import com.google.devtools.build.lib.util.io.FileOutErr;
+import com.google.devtools.build.lib.vfs.Path;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Strategy that uses subprocessing to execute a process.
+ */
+@ExecutionStrategy(name = { "standalone" }, contextType = SpawnActionContext.class)
+public class LocalSpawnStrategy implements SpawnActionContext {
+  private final boolean verboseFailures;
+
+  private final Path processWrapper;
+
+  public LocalSpawnStrategy(Path execRoot, boolean verboseFailures) {
+    this.verboseFailures = verboseFailures;
+    this.processWrapper = execRoot.getRelative(
+        "_bin/process-wrapper" + OsUtils.executableExtension());
+  }
+
+  /**
+   * Executes the given {@code spawn}.
+   */
+  @Override
+  public void exec(Spawn spawn,
+      ActionExecutionContext actionExecutionContext)
+      throws ExecException {
+    Executor executor = actionExecutionContext.getExecutor();
+    if (executor.reportsSubcommands()) {
+      executor.reportSubcommand(Label.print(spawn.getOwner().getLabel()),
+          spawn.asShellCommand(executor.getExecRoot()));
+    }
+
+    // We must wrap the subprocess with process-wrapper to kill the process tree.
+    // All actions therefore depend on the process-wrapper file. Since it's embedded,
+    // we don't bother with declaring it as an input.
+    List<String> args = new ArrayList<>();
+    if (OS.getCurrent() != OS.WINDOWS) {
+      // TODO(bazel-team): process-wrapper seems to work on Windows, but requires
+      // additional setup as it is an msys2 binary, so it needs msys2 DLLs on %PATH%.
+      // Disable it for now to make the setup easier and to avoid further PATH hacks.
+      // Ideally we should have a native implementation of process-wrapper for Windows.
+      args.add(processWrapper.getPathString());
+      args.add("-1"); /* timeout */
+      args.add("0");  /* kill delay. */
+
+      // TODO(bazel-team): use process-wrapper redirection so we don't have to
+      // pass test logs through the Java heap.
+      args.add("-");  /* stdout. */
+      args.add("-");  /* stderr. */
+    }
+    args.addAll(spawn.getArguments());
+
+    String cwd = executor.getExecRoot().getPathString();
+    Command cmd = new Command(args.toArray(new String[]{}), spawn.getEnvironment(), new File(cwd));
+
+    FileOutErr outErr = actionExecutionContext.getFileOutErr();
+    try {
+      cmd.execute(
+          /* stdin */ new byte[]{},
+          Command.NO_OBSERVER,
+          outErr.getOutputStream(),
+          outErr.getErrorStream(),
+          /*killSubprocessOnInterrupt*/ true);
+    } catch (CommandException e) {
+      String message = CommandFailureUtils.describeCommandFailure(
+          verboseFailures, spawn.getArguments(), spawn.getEnvironment(), cwd);
+      throw new UserExecException(String.format("%s: %s", message, e));
+    }
+  }
+
+  @Override
+  public String strategyLocality(String mnemonic, boolean remotable) {
+    return "standalone";
+  }
+
+  @Override
+  public boolean isRemotable(String mnemonic, boolean remotable) {
+    return false;
+  }
+}