rexreplace/legacy/rreplace.js at fc55f3710f20d502abaa2caa892c715f7062bddc · mathiasrw/rexreplace · GitHub

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#!/usr/bin/env node

// This file must only be edited with 'vim'

fs = require('fs');

var usage =	"\n\n> "
		+ process.argv[1].split('/').pop()
		+ " pattern replace filepath [regexFlags [encoding]]"
		+ "\n"
		+ "\nDefault regexFlags is gmi"
		+ "\nDefault encoding is utf8"
	;


if(process.argv.length<5)
	throw 'Too few arguments given.' + usage;

if(7<process.argv.length)
	throw 'Too many arguments given.' + usage;


var pattern 	= process.argv[2];

var replacement = process.argv[3];

var file 	= process.cwd()+'/'+process.argv[4]

if(!fs.existsSync(file))
	throw 'File not found: '+file;


var flags = 'gmi';

if(6<=process.argv.length)
	flags = process.argv[5];


var encoding = 'utf8'

if(7===process.argv.length)
 	encoding = process.argv[6];


try{
        var regex = new RegExp(pattern,flags);
} catch (err){
        throw 'Wrongly formatted regexp: '+ err;
}


fs.writeFileSync(file,fs.readFileSync(file,encoding).replace(regex, replacement));