// 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.bazel.repository;
import com.google.devtools.build.lib.analysis.BlazeDirectories;
import com.google.devtools.build.lib.bazel.repository.downloader.HttpDownloader;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.rules.repository.NewRepositoryFileHandler;
import com.google.devtools.build.lib.rules.repository.RepositoryDirectoryValue;
import com.google.devtools.build.lib.rules.repository.WorkspaceAttributeMapper;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.skyframe.SkyFunction.Environment;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import java.io.IOException;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Downloads an archive from a URL, decompresses it, creates a WORKSPACE file, and adds a BUILD
* file for it.
*/
public class NewHttpArchiveFunction extends HttpArchiveFunction {
public NewHttpArchiveFunction(HttpDownloader httpDownloader) {
super(httpDownloader);
}
@Nullable
@Override
public RepositoryDirectoryValue.Builder fetch(Rule rule, Path outputDirectory,
BlazeDirectories directories, Environment env, Map<String, String> markerData)
throws RepositoryFunctionException, InterruptedException {
NewRepositoryFileHandler fileHandler = new NewRepositoryFileHandler(directories.getWorkspace());
if (!fileHandler.prepareFile(rule, env)) {
return null;
}
try {
FileSystemUtils.createDirectoryAndParents(outputDirectory);
} catch (IOException e) {
throw new RepositoryFunctionException(new IOException("Could not create directory for "
+ rule.getName() + ": " + e.getMessage()), Transience.TRANSIENT);
}
// Download.
Path downloadedPath = downloader.download(
rule, outputDirectory, env.getListener(), clientEnvironment);
// Decompress.
Path decompressed;
WorkspaceAttributeMapper mapper = WorkspaceAttributeMapper.of(rule);
String prefix = null;
if (mapper.isAttributeValueExplicitlySpecified("strip_prefix")) {
try {
prefix = mapper.get("strip_prefix", Type.STRING);
} catch (EvalException e) {
throw new RepositoryFunctionException(e, Transience.PERSISTENT);
}
}
decompressed = DecompressorValue.decompress(DecompressorDescriptor.builder()
.setTargetKind(rule.getTargetKind())
.setTargetName(rule.getName())
.setArchivePath(downloadedPath)
.setRepositoryPath(outputDirectory)
.setPrefix(prefix)
.build());
// Finally, write WORKSPACE and BUILD files.
fileHandler.finishFile(outputDirectory);
return RepositoryDirectoryValue.builder().setPath(outputDirectory);
}
}