vinyl-sourcemaps-apply

Apply a source map to a vinyl file, merging it with preexisting source maps.

Usage:

``javascript
var applySourceMap = require('vinyl-sourcemaps-apply');
applySourceMap(vinylFile, sourceMap);
`

$3

`javascript
var through = require('through2');
var applySourceMap = require('vinyl-sourcemaps-apply');
var myTransform = require('myTransform');

module.exports = function(options) {

function transform(file, encoding, callback) {
// generate source maps if plugin source-map present
if (file.sourceMap) {
options.makeSourceMaps = true;
}

// do normal plugin logic
var result = myTransform(file.contents, options);
file.contents = new Buffer(result.code);

// apply source map to the chain
if (file.sourceMap) {
applySourceMap(file, result.map);
}

this.push(file);
callback();
}

return through.obj(transform);
};
``