2 * Copyright (C) 2018 Nick Downing <nick@ndcode.org>
3 * SPDX-License-Identifier: MIT
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 let BuildCache = require('@ndcode/build_cache')
25 let CleanCSS = require('@ndcode/clean-css')
26 let assert = require('assert')
27 let disk_build = require('@ndcode/disk_build')
28 let fs = require('fs')
29 let path = require('path')
30 let util = require('util')
32 let clean_css = new CleanCSS({returnPromise: true})
33 let fs_readFile = util.promisify(fs.readFile)
34 let fs_writeFile = util.promisify(fs.writeFile)
36 let MinCSSCache = function(diag1, diag) {
37 if (!this instanceof MinCSSCache)
38 throw new Error('MinCSSCache is a constructor')
39 BuildCache.call(this, diag)
43 MinCSSCache.prototype = Object.create(BuildCache.prototype)
45 MinCSSCache.prototype.build = async function(key, result) {
46 let render = await disk_build(
48 async temp_pathname => {
49 let render = await clean_css.minify(
50 await fs_readFile(key, {encoding: 'utf-8'})
52 for (let i = 0; i < render.warnings.length; ++i)
53 console.log(`clean-css warning: ${render.warnings[i]}`)
54 return /*await*/ fs_writeFile(
62 assert(render.deps.length === 0)
63 result.value = await fs_readFile(render.pathname)
66 module.exports = MinCSSCache