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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.bazel.repository;
import com.google.devtools.build.lib.bazel.rules.workspace.NewHttpArchiveRule;
import com.google.devtools.build.lib.cmdline.PackageIdentifier.RepositoryName;
import com.google.devtools.build.lib.packages.AggregatingAttributeMapper;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.skyframe.FileValue;
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;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.io.IOException;
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 {
@Override
public SkyFunctionName getSkyFunctionName() {
return SkyFunctionName.create(NewHttpArchiveRule.NAME);
}
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, SkyFunction.Environment env)
throws RepositoryFunctionException {
RepositoryName repositoryName = (RepositoryName) skyKey.argument();
Rule rule = getRule(repositoryName, NewHttpArchiveRule.NAME, env);
if (rule == null) {
return null;
}
Path outputDirectory = getExternalRepositoryDirectory().getRelative(rule.getName());
try {
FileSystemUtils.createDirectoryAndParents(outputDirectory);
} catch (IOException e) {
throw new RepositoryFunctionException(new IOException("Could not create directory for "
+ rule.getName() + ": " + e.getMessage()), Transience.TRANSIENT);
}
FileValue repositoryDirectory = getRepositoryDirectory(outputDirectory, env);
if (repositoryDirectory == null) {
return null;
}
// Download.
HttpDownloadValue downloadedFileValue;
try {
downloadedFileValue = (HttpDownloadValue) env.getValueOrThrow(
HttpDownloadFunction.key(rule, outputDirectory), IOException.class);
} catch (IOException e) {
throw new RepositoryFunctionException(e, Transience.PERSISTENT);
}
if (downloadedFileValue == null) {
return null;
}
// Decompress.
DecompressorValue decompressed;
try {
AggregatingAttributeMapper mapper = AggregatingAttributeMapper.of(rule);
String prefix = null;
if (mapper.has("rm_path_prefix", Type.STRING)
&& !mapper.get("rm_path_prefix", Type.STRING).isEmpty()) {
prefix = mapper.get("rm_path_prefix", Type.STRING);
}
decompressed = (DecompressorValue) env.getValueOrThrow(
DecompressorValue.key(rule.getTargetKind(), rule.getName(),
downloadedFileValue.getPath(), outputDirectory, prefix), IOException.class);
if (decompressed == null) {
return null;
}
} catch (IOException e) {
throw new RepositoryFunctionException(
new IOException(e.getMessage()), Transience.TRANSIENT);
}
// Add WORKSPACE and BUILD files.
createWorkspaceFile(decompressed.getDirectory(), rule);
return symlinkBuildFile(rule, getWorkspace(), repositoryDirectory, env);
}
}
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