Initial boiler plate project

node_modules/next/dist/esm/build/webpack/plugins/css-minimizer-plugin.js

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+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 { spans } from "./profiling-plugin";
+// 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({}, 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 = spans.get(compilation) || spans.get(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 asset = assets[file];
+                            const etag = cache.getLazyHashedEtag(asset);
+                            const cachedResult = await cache.getPromise(file, etag);
+                            assetSpan.setAttribute("cache", cachedResult ? "HIT" : "MISS");
+                            if (cachedResult) {
+                                assets[file] = cachedResult;
+                                return;
+                            }
+                            const result = await this.optimizeAsset(file, asset);
+                            await cache.storePromise(file, etag, result);
+                            assets[file] = result;
+                        });
+                    }));
+                });
+            });
+        });
+    }
+}
+
+//# sourceMappingURL=css-minimizer-plugin.js.map