org.sonar.plugins.python.pylint.PylintArguments.java Source code

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Here is the source code for org.sonar.plugins.python.pylint.PylintArguments.java

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/*
 * SonarQube Python Plugin
 * Copyright (C) 2011-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.plugins.python.pylint;

import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
import org.sonar.api.utils.command.Command;
import org.sonar.api.utils.command.CommandExecutor;

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

public class PylintArguments {

    private static final Pattern PYLINT_VERSION_PATTERN = Pattern.compile(".*pylint[^ ]* ([0-9\\.]+).*");
    private static final String[] ARGS_PYLINT_0_X = { "-i", "y", "-f", "parseable", "-r", "n" };
    private static final String[] ARGS_PYLINT_1_X = { "--msg-template",
            "{path}:{line}: [{msg_id}({symbol}), {obj}] {msg}", "-r", "n" };

    private final String[] arguments;

    public PylintArguments(Command command) {
        String pylintVersion = pylintVersion(command);
        this.arguments = pylintVersion.startsWith("0") ? ARGS_PYLINT_0_X : ARGS_PYLINT_1_X;
    }

    private static String pylintVersion(Command command) {
        long timeout = 10000;
        CommandStreamConsumer out = new CommandStreamConsumer();
        CommandStreamConsumer err = new CommandStreamConsumer();
        CommandExecutor.create().execute(command, out, err, timeout);
        Iterable<String> outputLines = Iterables.concat(out.getData(), err.getData());
        for (String outLine : outputLines) {
            Matcher matcher = PYLINT_VERSION_PATTERN.matcher(outLine);
            if (matcher.matches()) {
                return matcher.group(1);
            }
        }
        String message = "Failed to determine pylint version with command: \"" + command.toCommandLine()
                + "\", received " + Iterables.size(outputLines) + " line(s) of output:\n"
                + Joiner.on('\n').join(outputLines);
        throw new IllegalArgumentException(message);
    }

    public String[] arguments() {
        return arguments;
    }

}