com.google.devtools.build.lib.analysis.actions.ExecutableSymlinkAction.java Source code

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Here is the source code for com.google.devtools.build.lib.analysis.actions.ExecutableSymlinkAction.java

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// 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.analysis.actions;

import com.google.common.collect.Iterables;
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.Artifact;
import com.google.devtools.build.lib.vfs.Path;

import java.io.IOException;

/**
 * Action to create an executable symbolic link. It includes additional
 * validation that symlink target is indeed an executable file.
 */
public final class ExecutableSymlinkAction extends SymlinkAction {

    public ExecutableSymlinkAction(ActionOwner owner, Artifact input, Artifact output) {
        super(owner, input, output, "Symlinking " + owner.getLabel());
    }

    @Override
    public void execute(ActionExecutionContext actionExecutionContext) throws ActionExecutionException {
        Path inputPath = actionExecutionContext.getExecutor().getExecRoot().getRelative(getInputPath());
        try {
            // Validate that input path is a file with the executable bit is set.
            if (!inputPath.isFile()) {
                throw new ActionExecutionException(
                        "'" + Iterables.getOnlyElement(getInputs()).prettyPrint() + "' is not a file", this, false);
            }
            if (!inputPath.isExecutable()) {
                throw new ActionExecutionException("failed to create symbolic link '"
                        + Iterables.getOnlyElement(getOutputs()).prettyPrint() + "': file '"
                        + Iterables.getOnlyElement(getInputs()).prettyPrint() + "' is not executable", this, false);
            }
        } catch (IOException e) {
            throw new ActionExecutionException("failed to create symbolic link '"
                    + Iterables.getOnlyElement(getOutputs()).prettyPrint() + "' to the '"
                    + Iterables.getOnlyElement(getInputs()).prettyPrint() + "' due to I/O error: " + e.getMessage(),
                    e, this, false);
        }

        super.execute(actionExecutionContext);
    }

    @Override
    public String getMnemonic() {
        return "ExecutableSymlink";
    }
}