/opt/canhelp/node_modules/next/dist/esm/build/webpack/plugins
Edit: /opt/canhelp/node_modules/next/dist/esm/build/webpack/plugins/css-minimizer-plugin.js (3621B)
import cssnanoSimple from 'next/dist/compiled/cssnano-simple';
import postcssScss from 'next/dist/compiled/postcss-scss';
import postcss from 'postcss';
import { webpack, sources } from 'next/dist/compiled/webpack/webpack';
import { getCompilationSpan } from '../utils';
// https://github.com/NMFR/optimize-css-assets-webpack-plugin/blob/0a410a9bf28c7b0e81a3470a13748e68ca2f50aa/src/index.js#L20
const CSS_REGEX = /\.css(\?.*)?$/i;
export class CssMinimizerPlugin {
constructor(options){
this.__next_css_remove = true;
this.options = options;
}
optimizeAsset(file, asset) {
const postcssOptions = {
...this.options.postcssOptions,
to: file,
from: file,
// We don't actually add this parser to support Sass. It can also be used
// for inline comment support. See the README:
// https://github.com/postcss/postcss-scss/blob/master/README.md#2-inline-comments-for-postcss
parser: postcssScss
};
let input;
if (postcssOptions.map && asset.sourceAndMap) {
const { source, map } = asset.sourceAndMap();
input = source;
postcssOptions.map.prev = map ? map : false;
} else {
input = asset.source();
}
return postcss([
cssnanoSimple({
colormin: false
}, postcss)
]).process(input, postcssOptions).then((res)=>{
if (res.map) {
return new sources.SourceMapSource(res.css, file, res.map.toJSON());
} else {
return new sources.RawSource(res.css);
}
});
}
apply(compiler) {
compiler.hooks.compilation.tap('CssMinimizerPlugin', (compilation)=>{
const cache = compilation.getCache('CssMinimizerPlugin');
compilation.hooks.processAssets.tapPromise({
name: 'CssMinimizerPlugin',
stage: webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE
}, async (assets)=>{
const compilationSpan = getCompilationSpan(compilation) || getCompilationSpan(compiler);
const cssMinimizerSpan = compilationSpan.traceChild('css-minimizer-plugin');
return cssMinimizerSpan.traceAsyncFn(async ()=>{
const files = Object.keys(assets);
await Promise.all(files.filter((file)=>CSS_REGEX.test(file)).map(async (file)=>{
const assetSpan = cssMinimizerSpan.traceChild('minify-css');
assetSpan.setAttribute('file', file);
return assetSpan.traceAsyncFn(async ()=>{
const assetSource = compilation.getAsset(file).source;
const etag = cache.getLazyHashedEtag(assetSource);
const cachedResult = await cache.getPromise(file, etag);
assetSpan.setAttribute('cache', cachedResult ? 'HIT' : 'MISS');
if (cachedResult) {
compilation.updateAsset(file, cachedResult);
return;
}
const result = await this.optimizeAsset(file, assetSource);
await cache.storePromise(file, etag, result);
compilation.updateAsset(file, result);
});
}));
});
});
});
}
}
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