94 lines
2.4 KiB
Java
94 lines
2.4 KiB
Java
package pp.s1184725.boppi.util;
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import java.util.Scanner;
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import java.util.logging.Logger;
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import org.apache.commons.cli.*;
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import pp.iloc.model.Program;
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import pp.s1184725.boppi.ToolChain;
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/**
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* Provides an interactive command line for Boppi.
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*
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* @author Frank Wibbelink
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*/
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public class InteractivePrompt {
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private static CommandLine cmd;
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private static Scanner sc;
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/**
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* Runs the interactive command line.
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*
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* @param args
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* unused
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*/
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public static void main(String[] args) {
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Options options = new Options();
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options.addOption("s", "stateless", false, "run stateless (every command will run in a fresh environment)");
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options.addOption("n", "empty-line", false, "keep reading a single command until the user enters an empty line");
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options.addOption("h", "help", false, "display this message");
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options.addOption("p", "print-program", false, "prints the program before executing it");
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options.addOption("D", "debug", false, "runs a program in debug mode");
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options.addOption("k", "keep", false, "appends every new command to previous input (implies --stateless)");
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try {
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cmd = new DefaultParser().parse(options, args);
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}
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catch (ParseException e) {
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System.err.println(e.getLocalizedMessage());
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return;
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}
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if (cmd.hasOption("h")) {
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HelpFormatter formatter = new HelpFormatter();
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formatter.printHelp("boppi", "", options, "Exit a program by typing 'exit' on a line.");
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return;
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}
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sc = new Scanner(System.in);
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if (cmd.hasOption("n"))
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sc.useDelimiter("\r?\n\r?\n");
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else
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sc.useDelimiter("\r?\n");
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if (cmd.hasOption("s") || cmd.hasOption("k"))
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stateless();
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else
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System.err.println("Stateful interactive mode is not supported.");
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sc.close();
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}
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private static void stateless() {
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Logger logger = Logger.getAnonymousLogger();
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String saved = "";
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while (sc.hasNext()) {
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String command = sc.next().trim();
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if(command.equals(""))
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continue;
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if (command.equals("exit"))
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break;
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String code = saved+command;
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if (cmd.hasOption("k"))
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saved = code+";\n";
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Program program = ToolChain.compile(ToolChain.getCharStream(code), logger);
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if (cmd.hasOption("p")) {
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for (String line : program.prettyPrint().split("\n"))
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System.out.println("--- "+line);
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}
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for (String str : ToolChain.execute(program, logger, "").split("\n"))
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System.out.println("<<< "+str);
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}
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}
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}
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