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// Copyright 2015 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.RuleDefinition;
import com.google.devtools.build.lib.bazel.rules.workspace.GitRepositoryRule;
import com.google.devtools.build.lib.cmdline.PackageIdentifier.RepositoryName;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.skyframe.FileValue;
import com.google.devtools.build.lib.skyframe.RepositoryValue;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.skyframe.SkyFunctionException;
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;
/**
* Clones a Git repository.
*/
public class GitRepositoryFunction extends RepositoryFunction {
@Override
public SkyValue compute(SkyKey skyKey, Environment env) throws SkyFunctionException {
RepositoryName repositoryName = (RepositoryName) skyKey.argument();
Rule rule = RepositoryFunction.getRule(repositoryName, GitRepositoryRule.NAME, env);
if (rule == null) {
return null;
}
Path outputDirectory = getExternalRepositoryDirectory().getRelative(rule.getName());
FileValue directoryValue = createDirectory(outputDirectory, env, rule);
if (directoryValue == null) {
return null;
}
try {
HttpDownloadValue value = (HttpDownloadValue) env.getValueOrThrow(
GitCloneFunction.key(rule, outputDirectory), IOException.class);
if (value == null) {
return null;
}
} catch (IOException e) {
throw new RepositoryFunctionException(e, Transience.TRANSIENT);
}
return RepositoryValue.create(directoryValue);
}
protected FileValue createDirectory(Path path, Environment env, Rule rule)
throws RepositoryFunctionException {
try {
FileSystemUtils.createDirectoryAndParents(path);
} catch (IOException e) {
throw new RepositoryFunctionException(new IOException("Could not create directory for "
+ rule.getName() + ": " + e.getMessage()), Transience.TRANSIENT);
}
return getRepositoryDirectory(path, env);
}
@Override
public SkyFunctionName getSkyFunctionName() {
return SkyFunctionName.create(GitRepositoryRule.NAME.toUpperCase());
}
@Override
public Class<? extends RuleDefinition> getRuleDefinition() {
return GitRepositoryRule.class;
}
}
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