You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
1.6 KiB
JavaScript
102 lines
1.6 KiB
JavaScript
#!/usr/bin/env node
|
|
|
|
"use strict";
|
|
|
|
const fs = require( "fs" );
|
|
const peg = require( "../lib/peg" );
|
|
const options = require( "./options" );
|
|
|
|
// Helpers
|
|
|
|
function readStream( inputStream, callback ) {
|
|
|
|
let input = "";
|
|
inputStream.on( "data", data => {
|
|
|
|
input += data;
|
|
|
|
} );
|
|
inputStream.on( "end", () => {
|
|
|
|
callback( input );
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
function abort( message ) {
|
|
|
|
console.error( message );
|
|
process.exit( 1 );
|
|
|
|
}
|
|
|
|
// Main
|
|
|
|
let inputStream, outputStream;
|
|
|
|
if ( options.inputFile === "-" ) {
|
|
|
|
process.stdin.resume();
|
|
inputStream = process.stdin;
|
|
inputStream.on( "error", () => {
|
|
|
|
abort( `Can't read from file "${ options.inputFile }".` );
|
|
|
|
} );
|
|
|
|
} else {
|
|
|
|
inputStream = fs.createReadStream( options.inputFile );
|
|
|
|
}
|
|
|
|
if ( options.outputFile === "-" ) {
|
|
|
|
outputStream = process.stdout;
|
|
|
|
} else {
|
|
|
|
outputStream = fs.createWriteStream( options.outputFile );
|
|
outputStream.on( "error", () => {
|
|
|
|
abort( `Can't write to file "${ options.outputFile }".` );
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
readStream( inputStream, input => {
|
|
|
|
let location, source;
|
|
|
|
try {
|
|
|
|
source = peg.generate( input, options );
|
|
|
|
} catch ( e ) {
|
|
|
|
if ( typeof e.location === "object" ) {
|
|
|
|
location = e.location.start;
|
|
if ( typeof location === "object" ) {
|
|
|
|
return abort( location.line + ":" + location.column + ": " + e.message );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return abort( e.message );
|
|
|
|
}
|
|
|
|
outputStream.write( source );
|
|
if ( outputStream !== process.stdout ) {
|
|
|
|
outputStream.end();
|
|
|
|
}
|
|
|
|
} );
|