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// Copyright 2016 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.repository;
import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
import com.google.devtools.build.lib.cmdline.RepositoryName;
import com.google.devtools.build.lib.events.Event;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.skyframe.RepositoryValue;
import com.google.devtools.build.lib.skyframe.WorkspaceFileValue;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import com.google.devtools.build.lib.vfs.RootedPath;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import javax.annotation.Nullable;
/**
* Creates a local or remote repository and checks its WORKSPACE file.
*/
public class RepositoryLoaderFunction implements SkyFunction {
@Nullable
@Override
public SkyValue compute(SkyKey skyKey, Environment env)
throws SkyFunctionException, InterruptedException {
// This cannot be combined with {@link RepositoryDelegatorFunction}. RDF fetches the
// repository and must not have a Skyframe restart after writing it (otherwise the repository
// would be re-downloaded).
RepositoryName nameFromRule = (RepositoryName) skyKey.argument();
SkyKey repositoryKey = RepositoryDirectoryValue.key(nameFromRule);
RepositoryDirectoryValue repository = (RepositoryDirectoryValue) env.getValue(repositoryKey);
if (repository == null) {
return null;
}
SkyKey workspaceKey =
WorkspaceFileValue.key(
RootedPath.toRootedPath(repository.getPath(), new PathFragment("WORKSPACE")));
WorkspaceFileValue workspacePackage = (WorkspaceFileValue) env.getValue(workspaceKey);
if (workspacePackage == null) {
return null;
}
RepositoryName workspaceName;
try {
String workspaceNameStr = workspacePackage.getPackage().getWorkspaceName();
workspaceName = workspaceNameStr.isEmpty()
? RepositoryName.create("") : RepositoryName.create("@" + workspaceNameStr);
} catch (LabelSyntaxException e) {
throw new IllegalStateException(e);
}
if (!workspaceName.isDefault() && !nameFromRule.equals(workspaceName)) {
Path workspacePath = repository.getPath().getRelative("WORKSPACE");
env.getListener().handle(Event.warn(Location.fromFile(workspacePath),
"Workspace name in " + workspacePath + " (" + workspaceName + ") does not match the "
+ "name given in the repository's definition (" + nameFromRule + "); this will "
+ "cause a build error in future versions."));
}
return new RepositoryValue(nameFromRule, repository);
}
@Nullable
@Override
public String extractTag(SkyKey skyKey) {
return null;
}
}
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