| // Copyright 2014 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.rules.cpp; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.actions.AbstractAction; |
| import com.google.devtools.build.lib.actions.ActionExecutionContext; |
| import com.google.devtools.build.lib.actions.ActionExecutionException; |
| import com.google.devtools.build.lib.actions.ActionOwner; |
| import com.google.devtools.build.lib.actions.ActionResult; |
| import com.google.devtools.build.lib.actions.Artifact; |
| import com.google.devtools.build.lib.actions.ExecException; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import java.io.IOException; |
| |
| /** |
| * An action which greps for includes over a given .cc or .h file. |
| * This is a part of the work required for C++ include scanning. |
| * |
| * <p>For generated files, it is advantageous to do this remotely, to avoid having to download |
| * the generated file. |
| * |
| * <p>Note that this may run grep-includes over-optimistically, where we previously |
| * had not. For example, consider a cc_library of generated headers. If another |
| * library depends on it, and only references one of the headers, the other |
| * grep-includes will have been wasted. |
| */ |
| @Immutable |
| final class ExtractInclusionAction extends AbstractAction { |
| |
| private static final String GUID = "45b43e5a-4734-43bb-a05e-012313808142"; |
| |
| /** |
| * Constructs a new action. |
| */ |
| public ExtractInclusionAction(ActionOwner owner, Artifact input, Artifact output) { |
| super(owner, ImmutableList.of(input), ImmutableList.of(output)); |
| } |
| |
| @Override |
| protected String computeKey() { |
| return GUID; |
| } |
| |
| @Override |
| public String getMnemonic() { |
| return "GrepIncludes"; |
| } |
| |
| @Override |
| protected String getRawProgressMessage() { |
| return "Extracting include lines from " + getPrimaryInput().prettyPrint(); |
| } |
| |
| @Override |
| public ActionResult execute(ActionExecutionContext actionExecutionContext) |
| throws ActionExecutionException, InterruptedException { |
| IncludeScanningContext context = |
| actionExecutionContext.getContext(IncludeScanningContext.class); |
| try { |
| context.extractIncludes(actionExecutionContext, this, getPrimaryInput(), |
| getPrimaryOutput()); |
| } catch (IOException e) { |
| throw new ActionExecutionException(e, this, false); |
| } catch (ExecException e) { |
| throw e.toActionExecutionException(this); |
| } |
| return ActionResult.EMPTY; |
| } |
| } |