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A computation implementation to run computations locally

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/**
 * Copyright (c) 2017, RTE (http://www.rte-france.com)
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package com.powsybl.computation.local;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.util.List;
import java.util.Map;

/**
 * @author Geoffroy Jamgotchian 
 */
public class UnixLocalCommandExecutor extends AbstractLocalCommandExecutor {

    private static final Logger LOGGER = LoggerFactory.getLogger(UnixLocalCommandExecutor.class);

    @Override
    public int execute(String program, List args, Path outFile, Path errFile, Path workingDir, Map env) throws IOException, InterruptedException {
        // set TMPDIR to working dir to avoid issue with /tmp
        Map env2 = ImmutableMap.builder()
                .putAll(env)
                .put("TMPDIR", workingDir.toAbsolutePath().toString())
                .build();

        StringBuilder internalCmd = new StringBuilder();
        for (Map.Entry entry : env2.entrySet()) {
            String name = entry.getKey();
            String value = entry.getValue();
            internalCmd.append(name).append("=").append(value);
            if (name.endsWith("PATH")) {
                internalCmd.append(File.pathSeparator).append("$").append(name);
            }
            internalCmd.append(" ");
        }
        internalCmd.append(program);
        for (String arg : args) {
            internalCmd.append(" \"").append(arg).append("\"");
        }

        List cmdLs = ImmutableList.builder()
                .add("bash")
                .add("-c")
                .add(internalCmd.toString())
                .build();
        return execute(cmdLs, workingDir, outFile, errFile);
    }

    @Override
    void nonZeroLog(List cmdLs, int exitCode) {
        LOGGER.debug(NON_ZERO_LOG_PATTERN, cmdLs, exitCode);
    }
}