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

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

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/*
 * Copyright 2016 The Closure Rules 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.javascript.jscomp;

import static com.google.common.base.Preconditions.checkArgument;
import static java.nio.charset.StandardCharsets.UTF_8;

import com.google.common.base.Optional;
import com.google.protobuf.TextFormat;
import io.bazel.rules.closure.BuildInfo.ClosureJsLibrary;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

final class JsCheckerHelper {

    static boolean isGeneratedPath(String path) {
        return path.startsWith("blaze-out/") || path.startsWith("bazel-out/");
    }

    static Optional<String> convertPathToModuleName(String path, Iterable<String> roots) {
        checkArgument(!path.startsWith("/"));
        if (!path.endsWith(".js") && !path.endsWith(".zip")) {
            return Optional.absent();
        }
        String module = path;
        for (String root : roots) {
            if (module.startsWith(root + "/")) {
                module = module.substring(root.length() + 1);
                break;
            }
        }

        String moduleOrZipName = module.split("!")[0];
        return Optional.of("/" + moduleOrZipName);
    }

    static String normalizeClosureNamespace(String namespace) {
        return "goog:" + namespace;
    }

    /** Loads pbtxt info file generated by closure_js_library. */
    static ClosureJsLibrary loadClosureJsLibraryInfo(Path path) throws IOException {
        ClosureJsLibrary.Builder build = ClosureJsLibrary.newBuilder();
        TextFormat.getParser().merge(new String(Files.readAllBytes(path), UTF_8), build);
        return build.build();
    }

    /** Returns {@code true} if error was produced by code generated by compiler passes. */
    static boolean isInSyntheticCode(JSError error) {
        return error.sourceName != null && error.sourceName.startsWith(" [synthetic:");
    }

    private JsCheckerHelper() {
    }
}