// 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.BlazeDirectories;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.bazel.rules.workspace.MavenServerRule;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.rules.repository.RepositoryFunction;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.skyframe.SkyFunction.Environment;
import com.google.devtools.build.skyframe.SkyFunctionException;
import com.google.devtools.build.skyframe.SkyFunctionException.Transience;
import com.google.devtools.build.skyframe.SkyValue;

import javax.annotation.Nullable;

/**
 * Stub {@link RepositoryFunction} for {@code maven_server} rules.
 */
public class MavenServerRepositoryFunction extends RepositoryFunction {

  @Override
  public boolean isLocal(Rule rule) {
    return true;
  }

  @Nullable
  @Override
  public SkyValue fetch(
      Rule rule, Path outputDirectory, BlazeDirectories directories, Environment env)
          throws SkyFunctionException, InterruptedException {
    throw new RepositoryFunctionException(new EvalException(
        rule.getLocation(),
        "maven_server rule '" + rule.getName() + "' does not represent an actual repository"),
        Transience.PERSISTENT);
  }

  @Override
  public Class<? extends RuleDefinition> getRuleDefinition() {
    return MavenServerRule.class;
  }
}
