40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
'use strict';
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var _ = require('lodash'),
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fs = require('fs-extra'),
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uglify = require('uglify-js');
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var uglifyOptions = require('./uglify.options');
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/*----------------------------------------------------------------------------*/
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/**
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* Asynchronously minifies the file at `srcPath`, writes it to `destPath`, and
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* invokes `callback` upon completion. The callback is invoked with one argument:
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* (error).
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*
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* If unspecified, `destPath` is `srcPath` with an extension of `.min.js`. For
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* example, a `srcPath` of `path/to/foo.js` would have a `destPath` of `path/to/foo.min.js`.
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*
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* @param {string} srcPath The path of the file to minify.
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* @param {string} [destPath] The path to write the file to.
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* @param {Function} callback The function invoked upon completion.
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* @param {Object} [option] The UglifyJS options object.
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*/
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function minify(srcPath, destPath, callback, options) {
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if (_.isFunction(destPath)) {
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if (_.isObject(callback)) {
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options = callback;
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}
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callback = destPath;
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destPath = undefined;
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}
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if (!destPath) {
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destPath = srcPath.replace(/(?=\.js$)/, '.min');
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}
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var output = uglify.minify(srcPath, _.defaults(options || {}, uglifyOptions));
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fs.writeFile(destPath, output.code, 'utf-8', callback);
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}
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module.exports = minify;
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