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Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs. This binary checks for style issues such as incorrect or missing JSDoc usage, and missing goog.require() statements. It does not do more advanced checks such as typechecking.

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/*
 * Copyright 2019 The Closure Compiler Authors.
 *
 * 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.javascript.jscomp;

import com.google.common.collect.ImmutableList;
import java.util.List;

/**
 * Runs only the user-supplied conformance checks and any earlier passes required by conformance.
 */
public class ConformancePassConfig extends PassConfig.PassConfigDelegate {

  private final PassConfig delegate;

  public ConformancePassConfig(PassConfig delegate) {
    super(delegate);
    this.delegate = delegate;
  }

  @Override
  protected List getChecks() {
    List fromDelegate = delegate.getChecks();
    int conformanceIndex = -1;
    for (int i = 0; i < fromDelegate.size(); i++) {
      if (PassNames.CHECK_CONFORMANCE.equals(fromDelegate.get(i).getName())) {
        conformanceIndex = i;
        break;
      }
    }
    // Return every check up to and including the "checkConformance" check. Return empty list if
    // "checkConformance" not found. This list may include some unnecessary checks that run before
    // conformance. However, there's no other reliable way to find a list of all the passes
    // that conformance depends on.
    return fromDelegate.subList(0, conformanceIndex + 1);
  }

  @Override
  protected List getOptimizations() {
    return ImmutableList.of();
  }
}