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Watch script to compile Coffeescript, Jade and Less.css

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gistfile1.js
JavaScript
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/*
* Tested on node 0.6, Ubuntu
*/
#!/usr/bin/node
 
COLOR_GREEN="\033[01;32m"
COLOR_RED="\033[01;31m"
COLOR_YELLOW="\033[01;33m"
COLOR_BLUE="\033[01;34m"
COLOR_NORMAL="\033[00m"
 
var fs = require('fs');
 
var coffeescript, jade, less;
try {
coffeescript = require('/usr/lib/node_modules/coffee-script'); // after npm -g install coffee-script
} catch(e) {
console.log(COLOR_RED,String(e),COLOR_NORMAL);
}
 
try {
jade = require('/usr/lib/node_modules/jade'); // after npm -g install jade
} catch(e) {
console.log(COLOR_RED,String(e),COLOR_NORMAL);
}
 
try {
less = require('/usr/lib/node_modules/less'); // after npm -g install less
} catch(e) {
console.log(COLOR_RED,String(e),COLOR_NORMAL);
}
 
console.log(
'Watch Support',
(coffeescript ? COLOR_GREEN : COLOR_RED),' coffeescript ',COLOR_NORMAL,
(jade ? COLOR_GREEN : COLOR_RED),' jade ',COLOR_NORMAL,
(less ? COLOR_GREEN : COLOR_RED),' less ',COLOR_NORMAL
);
 
var compile = function (fname) {
var source = fs.readFileSync(fname).toString();
try {
if(/\.jade$/.test(fname)) {
 
var html = jade.compile(source,{pretty:true})();
var htmlfname = fname.replace(/\.jade$/,'.html');
fs.writeFileSync(htmlfname, html);
console.log(COLOR_GREEN,'Success ',fname,new Date(),COLOR_NORMAL)
 
} else if(/\.coffee$/.test(fname)) {
 
var js = coffeescript.compile(source);
var jsfname = fname.replace(/\.coffee$/,'.js');
fs.writeFileSync(jsfname, js);
console.log(COLOR_GREEN,'Success ',fname,new Date(),COLOR_NORMAL)
 
} else if(/\.less$/.test(fname)) {
 
var lessparser = new(less.Parser);
var cssfname = fname.replace(/\.less$/,'.css');
lessparser.parse(source, function (e, tree) {
if(e) {
console.log(COLOR_RED,'Failed ',fname,String(e),COLOR_NORMAL);
} else {
fs.writeFileSync(cssfname, tree.toCSS());
console.log(COLOR_GREEN,'Success ',fname,new Date(),COLOR_NORMAL)
}
});
 
}
} catch(e) {
console.log(COLOR_RED,'Failed ',fname,String(e),COLOR_NORMAL)
}
}
 
var walk = function(dir, done) {
var results = [];
fs.readdir(dir, function(err, list) {
if (err) return done(err);
var pending = list.length;
if (!pending) return done(null, results);
list.forEach(function(file) {
file = dir + '/' + file;
fs.stat(file, function(err, stat) {
if (stat && stat.isDirectory()) {
walk(file, function(err, res) {
results = results.concat(res);
if (!--pending) done(null, results);
});
} else {
results.push(file);
if (!--pending) done(null, results);
}
});
});
});
};
 
function main() {
if(process.argv.length > 2) {
dirName = process.argv[2];
} else {
dirName = '.';
}
 
stats = fs.statSync(dirName);
 
if(stats.isDirectory()) {
 
walk(dirName,function (err, files) {
var watching = 0;
files.forEach(function (fname) {
if(/\.coffee$|\.less$|\.jade$/.test(fname)) {
fs.watchFile(fname,{persistent:true,interval:500},
function (cur,prev) {
if(cur.mtime.getTime() != prev.mtime.getTime()) {
compile(fname);
}
}
);
watching++;
}
});
if(watching) {
console.log('Watching '+watching+' file(s) in '+
COLOR_YELLOW+dirName+COLOR_NORMAL);
} else {
console.log('No coffee/jade/less files found to watch');
}
});
} else {
// It's a file
var fname = dirName;
if(/\.coffee$|\.less$|\.jade$/.test(fname)) {
fs.watchFile(fname,{persistent:true,interval:500},
function (cur,prev) {
if(cur.mtime.getTime() != prev.mtime.getTime()) {
compile(fname);
}
}
);
console.log('Watching '+COLOR_YELLOW+fname+COLOR_NORMAL);
} else {
console.log('No coffee/jade/less files found to watch');
}
}
}
 
main();

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