function writeResult (name, content, fn) {
var funcs = [
async.apply(writeFile, name, content.css)
];
if (content.map && name) {
funcs.push(async.apply(writeFile, name + '.map', content.map.toString()));
}
async.parallel(funcs, fn);
}
function processCSS(processor, input, output, fn) {
function doProcess(css, fn) {
function onResult(result) {
if (typeof result.warnings === 'function') {
result.warnings().forEach(function(w) { console.warn(w.toString()); });
}
fn(null, result);
}
var options = {
from: input,
to: output
};
Object.keys(customSyntaxOptions).forEach(function(opt) {
options[opt] = customSyntaxOptions[opt];
});
if (typeof mapOptions !== 'undefined') {
options.map = mapOptions;
}
var result = processor.process(css, options);
if (typeof result.then === 'function') {
result.then(onResult).catch(fn);
} else {
process.nextTick(onResult.bind(null, result));
}
}
async.waterfall([
async.apply(readFile, input),
doProcess,
async.apply(writeResult, output)
], fn);
}