com.google.copybara.authoring.AuthorParser.java Source code

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Here is the source code for com.google.copybara.authoring.AuthorParser.java

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/*
 * Copyright (C) 2016 Google Inc.
 *
 * 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.copybara.authoring;

import com.google.common.base.Preconditions;
import com.google.re2j.Matcher;
import com.google.re2j.Pattern;

/**
 * A parser for the standard autor format {@code "Name <email>"}.
 *
 * <p>This is the format used by most VCS (Git, Mercurial) and also by the Copybara configuration
 * itself. The parser is lenient: {@code email} can be empty, and it doesn't validate that is an
 * actual email.
 */
public class AuthorParser {

    private static final Pattern AUTHOR_PATTERN = Pattern.compile("(?P<name>[^<]+)<(?P<email>[^>]*)>");

    /**
     * Parses a Git author {@code string} into an {@link Author}.
     */
    public static Author parse(String author) throws InvalidAuthorException {
        Preconditions.checkNotNull(author);
        Matcher matcher = AUTHOR_PATTERN.matcher(author);
        if (!matcher.matches()) {
            throw new InvalidAuthorException(
                    String.format("Invalid author '%s'. Must be in the form of 'Name <email>'", author));
        }
        return new Author(matcher.group(1).trim(), matcher.group(2).trim());
    }
}