com.google.javascript.jscomp.RemoveWeakSources.java Source code

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Here is the source code for com.google.javascript.jscomp.RemoveWeakSources.java

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/*
 * Copyright 2018 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.base.Preconditions;
import com.google.javascript.rhino.Node;

/** Removes the contents of weak source files. */
class RemoveWeakSources implements CompilerPass {

    private final AbstractCompiler compiler;

    public RemoveWeakSources(AbstractCompiler compiler) {
        this.compiler = compiler;
    }

    @Override
    public void process(Node externs, Node root) {
        for (Node script = root.getFirstChild(); script != null; script = script.getNext()) {
            Preconditions.checkState(script.isScript());
            if (script.getStaticSourceFile().isWeak()) {
                // Keep the file but remove the contents, since some users expect the number of input and
                // output files to be the same.
                NodeUtil.deleteChildren(script, compiler);
            }
        }
    }
}