Switch command-line mode backend from Rhino to Node
David Majda
14 years ago
parent
e25dcfbac8
commit
814ce7d9db
@ -1,10 +1,127 @@
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#!/bin/sh
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#!/usr/bin/env node
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if [ -L "$0" ]; then
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THIS_FILE=`readlink "$0"`
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else
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THIS_FILE=$0
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fi
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DIR=`dirname "$THIS_FILE"`
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var sys = require("sys");
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var fs = require("fs");
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var PEG = require("../lib/peg");
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java -jar "$DIR/../vendor/rhino/js.jar" "$DIR/pegjs-main.js" "$DIR" "$@"
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/* ===== Helpers ===== */
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function printVersion() {
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sys.puts("PEG.js " + PEG.VERSION);
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}
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function printHelp() {
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sys.puts("Usage: pegjs [options] [--] [<input_file>] [<output_file>]");
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sys.puts("");
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sys.puts("Generates a parser from the PEG grammar specified in the <input_file> and");
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sys.puts("writes it to the <output_file>.");
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sys.puts("");
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sys.puts("If the <output_file> is omitted, its name is generated by changing the");
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sys.puts("<input_file> extension to \".js\". If both <input_file> and <output_file> are");
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sys.puts("omitted, standard input and output are used.");
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sys.puts("");
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sys.puts("Options:");
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sys.puts(" -e, --export-var <variable> name of the variable where the parser object");
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sys.puts(" will be stored (default: \"exports.parser\")");
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sys.puts(" -v, --version print version information and exit");
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sys.puts(" -h, --help print help and exit");
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}
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function exitSuccess() {
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process.exit(0);
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}
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function exitFailure() {
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process.exit(1);
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}
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function abort(message) {
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sys.error(message);
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exitFailure();
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}
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/* ===== Arguments ===== */
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var args = process.argv.slice(2); // Trim "node" and the script path.
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function isOption(arg) {
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return /-.+/.test(arg);
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}
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function nextArg() {
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args.shift();
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}
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/* ===== Files ===== */
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function readStream(inputStream, callback) {
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var input = "";
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inputStream.on("data", function(data) { input += data; });
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inputStream.on("end", function() { callback(input); });
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}
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/* ===== Main ===== */
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/* This makes the generated parser a CommonJS module by default. */
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var exportVar = "exports.parser";
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while (args.length > 0 && isOption(args[0])) {
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switch (args[0]) {
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case "-e":
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case "--export-var":
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nextArg();
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exportVar = args[0];
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break;
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case "-v":
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case "--version":
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printVersion();
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exitSuccess();
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break;
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case "-h":
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case "--help":
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printHelp();
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exitSuccess();
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break;
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case "--":
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nextArg();
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break;
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default:
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abort("Unknown option: " + args[0] + ".");
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}
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nextArg();
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}
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switch (args.length) {
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case 0:
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var inputStream = process.openStdin();
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var outputStream = process.stdout;
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break;
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case 1:
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case 2:
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var inputStream = fs.createReadStream(args[0]);
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var outputStream = fs.createWriteStream(
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args.length == 1 ? args[0].replace(/\.[^.]*$/, ".js") : args[1]
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);
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break;
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default:
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abort("Too many arguments.");
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}
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readStream(inputStream, function(input) {
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try {
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var parser = PEG.buildParser(input);
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} catch (e) {
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if (e.line !== undefined && e.column !== undefined) {
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abort(e.line + ":" + e.column + ": " + e.message);
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} else {
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abort(e.message);
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}
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}
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outputStream.write(exportVar + " = " + parser.toSource() + ";\n");
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outputStream.end();
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});
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@ -1,155 +0,0 @@
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importPackage(java.io);
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importPackage(java.lang);
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/*
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* Rhino does not have __FILE__ or anything similar so we have to pass the
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* script path from the outside.
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*/
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load(arguments[0] + "/../lib/peg.js");
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var FILE_STDIN = "-";
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var FILE_STDOUT = "-";
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function readFile(file) {
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var f = new BufferedReader(new InputStreamReader(
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file === FILE_STDIN ? System["in"] : new FileInputStream(file)
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));
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var result = "";
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var line = "";
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try {
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while ((line = f.readLine()) !== null) {
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result += line + "\n";
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}
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} finally {
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f.close();
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}
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return result;
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}
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function writeFile(file, text) {
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var f = new BufferedWriter(new OutputStreamWriter(
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file === FILE_STDOUT ? System.out : new FileOutputStream(file)
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));
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try {
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f.write(text);
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} finally {
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f.close();
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}
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}
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function isOption(arg) {
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return /-.+/.test(arg);
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}
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function printVersion() {
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print("PEG.js " + PEG.VERSION);
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}
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function printHelp() {
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print("Usage: pegjs [options] [--] [<input_file>] [<output_file>]");
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print("");
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print("Generates a parser from the PEG grammar specified in the <input_file> and");
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print("writes it to the <output_file>.");
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print("");
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print("If the <output_file> is omitted, its name is generated by changing the");
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print("<input_file> extension to \".js\". If both <input_file> and <output_file> are");
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print("omitted, standard input and output are used.");
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print("");
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print("Options:");
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print(" -e, --export-var <variable> name of the variable where the parser object");
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print(" will be stored (default: \"exports.parser\")");
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print(" -v, --version print version information and exit");
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print(" -h, --help print help and exit");
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}
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function nextArg() {
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args.shift();
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}
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function exitSuccess() {
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quit(0);
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}
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function exitFailure() {
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quit(1);
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}
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function abort(message) {
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System.out.println(message);
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exitFailure();
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}
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/* This makes the generated parser a CommonJS module by default. */
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var exportVar = "exports.parser";
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/*
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* The trimmed first argument is the script path -- see the beginning of this
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* file.
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*/
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var args = Array.prototype.slice.call(arguments, 1);
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while (args.length > 0 && isOption(args[0])) {
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switch (args[0]) {
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case "-e":
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case "--export-var":
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nextArg();
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exportVar = args[0];
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break;
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case "--version":
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printVersion();
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exitSuccess();
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break;
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case "-v":
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case "--version":
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printVersion();
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exitSuccess();
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break;
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case "-h":
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case "--help":
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printHelp();
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exitSuccess();
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break;
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case "--":
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nextArg();
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break;
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default:
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abort("Unknown option: " + args[0] + ".");
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}
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nextArg();
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}
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switch (args.length) {
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case 0:
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var inputFile = FILE_STDIN;
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var outputFile = FILE_STDOUT;
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break;
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case 1:
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var inputFile = args[0];
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var outputFile = args[0].replace(/\.[^.]*$/, ".js");
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break;
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case 2:
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var inputFile = args[0];
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var outputFile = args[1];
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break;
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default:
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abort("Too many arguments.");
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}
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var input = readFile(inputFile);
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try {
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var parser = PEG.buildParser(input);
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} catch (e) {
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if (e.line !== undefined && e.column !== undefined) {
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abort(e.line + ":" + e.column + ": " + e.message);
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} else {
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abort(e.message);
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}
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}
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writeFile(outputFile, exportVar + " = " + parser.toSource() + ";\n");
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@ -1,6 +0,0 @@
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@echo off
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set DIR_WITH_SLASH=%~dp0
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set DIR=%DIR_WITH_SLASH:~0,-1%
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java -jar "%DIR%\..\vendor\rhino\js.jar" "%DIR%\pegjs-main.js" "%DIR%" %*
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