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/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
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 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
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 *
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package org.jruby.util.io;

import java.io.File;
import java.io.IOException;
import java.util.Map;

public class Java5ProcessMaker implements ProcessMaker {
    private final ProcessBuilder builder;
    public Java5ProcessMaker(String[] command) {
        builder = new ProcessBuilder(command);
    }

    public Map environment() {
        return builder.environment();
    }

    public ProcessMaker environment(String[] envLines) {
        envIntoProcessBuilder(builder, envLines);
        return this;
    }

    public File directory() {
        return builder.directory();
    }

    public ProcessMaker directory(File dir) {
        builder.directory(dir);
        return this;
    }

    public Process start() throws IOException {
        return builder.start();
    }

    private static void envIntoProcessBuilder(ProcessBuilder pb, String[] env) {
        if (env == null) return;

        pb.environment().clear();
        for (String envLine : env) {
            if (envLine.indexOf(0) != -1) {
                envLine = envLine.replaceFirst("\u0000.*", "");
            }

            int index = envLine.indexOf('=');

            if (index != -1) {
                pb.environment().put(
                        envLine.substring(0, index),
                        envLine.substring(index + 1));
            }
        }
    }
}