Website Structure

Frontend-Learner/node_modules/@rollup/plugin-terser/src/module.ts

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+import { fileURLToPath } from 'url';
+
+import type { NormalizedOutputOptions, RenderedChunk } from 'rollup';
+import { hasOwnProperty, isObject, merge } from 'smob';
+
+import type { Options } from './type';
+import { WorkerPool } from './worker-pool';
+
+export default function terser(input: Options = {}) {
+  const { maxWorkers, ...options } = input;
+
+  let workerPool: WorkerPool | null | undefined;
+  let numOfChunks = 0;
+  let numOfWorkersUsed = 0;
+
+  return {
+    name: 'terser',
+
+    async renderChunk(code: string, chunk: RenderedChunk, outputOptions: NormalizedOutputOptions) {
+      if (!workerPool) {
+        workerPool = new WorkerPool({
+          filePath: fileURLToPath(import.meta.url),
+          maxWorkers
+        });
+      }
+
+      numOfChunks += 1;
+
+      const defaultOptions: Options = {
+        sourceMap: outputOptions.sourcemap === true || typeof outputOptions.sourcemap === 'string'
+      };
+
+      if (outputOptions.format === 'es') {
+        defaultOptions.module = true;
+      }
+
+      if (outputOptions.format === 'cjs') {
+        defaultOptions.toplevel = true;
+      }
+
+      try {
+        const {
+          code: result,
+          nameCache,
+          sourceMap
+        } = await workerPool.addAsync({
+          code,
+          options: merge({}, options || {}, defaultOptions)
+        });
+
+        if (options.nameCache && nameCache) {
+          let vars: Record<string, any> = {
+            props: {}
+          };
+
+          if (hasOwnProperty(options.nameCache, 'vars') && isObject(options.nameCache.vars)) {
+            vars = merge({}, options.nameCache.vars || {}, vars);
+          }
+
+          if (hasOwnProperty(nameCache, 'vars') && isObject(nameCache.vars)) {
+            vars = merge({}, nameCache.vars, vars);
+          }
+
+          // eslint-disable-next-line no-param-reassign
+          options.nameCache.vars = vars;
+
+          let props: Record<string, any> = {};
+
+          if (hasOwnProperty(options.nameCache, 'props') && isObject(options.nameCache.props)) {
+            // eslint-disable-next-line prefer-destructuring
+            props = options.nameCache.props;
+          }
+
+          if (hasOwnProperty(nameCache, 'props') && isObject(nameCache.props)) {
+            props = merge({}, nameCache.props, props);
+          }
+
+          // eslint-disable-next-line no-param-reassign
+          options.nameCache.props = props;
+        }
+
+        if ((!!defaultOptions.sourceMap || !!options.sourceMap) && isObject(sourceMap)) {
+          return {
+            code: result,
+            map: sourceMap
+          };
+        }
+        return result;
+      } catch (e) {
+        return Promise.reject(e);
+      } finally {
+        numOfChunks -= 1;
+        if (numOfChunks === 0) {
+          numOfWorkersUsed = workerPool.numWorkers;
+          workerPool.close();
+          workerPool = null;
+        }
+      }
+    },
+
+    get numOfWorkersUsed() {
+      return numOfWorkersUsed;
+    }
+  };
+}