/usr/bin/pegjs is in node-peg 0.7.0-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 | #!/usr/bin/env /usr/bin/nodejs
var util = require("util");
var fs = require("fs");
var PEG = require("peg-js");
/* Helpers */
function printVersion() {
util.puts("PEG.js " + PEG.VERSION);
}
function printHelp() {
util.puts("Usage: pegjs [options] [--] [<input_file>] [<output_file>]");
util.puts("");
util.puts("Generates a parser from the PEG grammar specified in the <input_file> and");
util.puts("writes it to the <output_file>.");
util.puts("");
util.puts("If the <output_file> is omitted, its name is generated by changing the");
util.puts("<input_file> extension to \".js\". If both <input_file> and <output_file> are");
util.puts("omitted, standard input and output are used.");
util.puts("");
util.puts("Options:");
util.puts(" -e, --export-var <variable> name of the variable where the parser object");
util.puts(" will be stored (default: \"module.exports\")");
util.puts(" --cache make generated parser cache results");
util.puts(" --track-line-and-column make generated parser track line and column");
util.puts(" -v, --version print version information and exit");
util.puts(" -h, --help print help and exit");
}
function exitSuccess() {
process.exit(0);
}
function exitFailure() {
process.exit(1);
}
function abort(message) {
util.error(message);
exitFailure();
}
/* Arguments */
var args = process.argv.slice(2); // Trim "node" and the script path.
function isOption(arg) {
return /^-/.test(arg);
}
function nextArg() {
args.shift();
}
/* Files */
function readStream(inputStream, callback) {
var input = "";
inputStream.on("data", function(data) { input += data; });
inputStream.on("end", function() { callback(input); });
}
/* Main */
/* This makes the generated parser a CommonJS module by default. */
var exportVar = "module.exports";
var options = {
cache: false,
trackLineAndColumn: false
};
while (args.length > 0 && isOption(args[0])) {
switch (args[0]) {
case "-e":
case "--export-var":
nextArg();
if (args.length === 0) {
abort("Missing parameter of the -e/--export-var option.");
}
exportVar = args[0];
break;
case "--cache":
options.cache = true;
break;
case "--track-line-and-column":
options.trackLineAndColumn = true;
break;
case "-v":
case "--version":
printVersion();
exitSuccess();
break;
case "-h":
case "--help":
printHelp();
exitSuccess();
break;
case "--":
nextArg();
break;
default:
abort("Unknown option: " + args[0] + ".");
}
nextArg();
}
switch (args.length) {
case 0:
process.stdin.resume();
var inputStream = process.stdin;
var outputStream = process.stdout;
break;
case 1:
case 2:
var inputFile = args[0];
var inputStream = fs.createReadStream(inputFile);
inputStream.on("error", function() {
abort("Can't read from file \"" + inputFile + "\".");
});
var outputFile = args.length == 1
? args[0].replace(/\.[^.]*$/, ".js")
: args[1];
var outputStream = fs.createWriteStream(outputFile);
outputStream.on("error", function() {
abort("Can't write to file \"" + outputFile + "\".");
});
break;
default:
abort("Too many arguments.");
}
readStream(inputStream, function(input) {
try {
var parser = PEG.buildParser(input, options);
} catch (e) {
if (e.line !== undefined && e.column !== undefined) {
abort(e.line + ":" + e.column + ": " + e.message);
} else {
abort(e.message);
}
}
outputStream.write(exportVar + " = " + parser.toSource() + ";\n");
if (outputStream !== process.stdout) {
outputStream.end();
}
});
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