com.google.copybara.git.GitAuthorParser.java Source code

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Here is the source code for com.google.copybara.git.GitAuthorParser.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.git;

import com.google.common.base.Preconditions;
import com.google.copybara.Author;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * A parser of the Git author format.
 *
 * Git is lenient on the author validation and only requires {@code "Foo <bar>"}, but does not
 * validate that {@code bar} is actually an email. Also {@code "Foo <>"} is valid, but
 * {@code "<bar>"} is not.
 *
 * TODO(copybara-team): Consider using JGit's RawParseUtils
 */
class GitAuthorParser {

    private static final Pattern AUTHOR_PATTERN = Pattern.compile("(.+ )<(.*)>");

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