Add terser script to ts common scripts

ts-common/terser.ts

+import type { MinifyOptions } from "terser";
+import { minify } from "terser";
+import { readdirSync, readFileSync, statSync, writeFileSync } from "node:fs";
+import { resolve, join, dirname } from "node:path";
+import { fileURLToPath } from 'node:url';
+import { existsSync } from "node:fs";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+const packageJsonLocation = join(process.cwd(), "package.json");
+const { files } = JSON.parse(readFileSync(packageJsonLocation, { encoding: "utf-8" }));
+
+// =============== #1 ANALYZE "files" in package.json and collect all .js sources ===============
+const jsSources: string[] = [];
+const analyzePath = (path: string) => {
+  if (!existsSync(path)) {
+    console.warn(`The path ${path} does not exist`);
+
+    return;
+  }
+
+  if (statSync(path).isFile()) {
+    if (path.endsWith(".js"))
+      jsSources.push(resolve(__dirname, path));
+
+    return;
+  }
+
+  for(const file of readdirSync(path, { withFileTypes: true }))
+    analyzePath(join(file.parentPath, file.name));
+}
+
+for(const file of files)
+  analyzePath(resolve(file));
+
+// =============== #2 Define terser minification configuration ===============
+
+const minifyOptions: MinifyOptions = {
+  compress: true,
+  mangle: false,
+  ecma: 2020,
+  ie8: false,
+  keep_classnames: true,
+  keep_fnames: true,
+  sourceMap: false,
+  format: {
+    inline_script: false,
+    comments: false,
+    max_line_len: 100
+  }
+};
+
+// =============== #3 Minify the files ===============
+
+for(const file of jsSources) {
+  const inputCode = readFileSync(file, { encoding: "utf-8" });
+
+  void minify(inputCode, minifyOptions).then(({ code }) => {
+    if (!code)
+      throw new Error(`Failed to minify the file ${file}`);
+
+    writeFileSync(file, code, { encoding: "utf-8" });
+
+    console.log(`Minified ${file}`);
+  });
+}