Add postinstall.mjs

Author: DmitrySharabin

_build/postinstall.mjs

@@ -0,0 +1,98 @@
+import fs from "fs/promises";
+import path from "path";
+import { fileURLToPath } from "url";
+import { execSync } from "child_process";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const root = path.resolve(__dirname, "../node_modules");
+const prismPath = path.join(root, "prismjs");
+
+let sourcePath, destPath;
+
+// --- Cloning & Installing Prism ---
+console.log("[postinstall] Cloning Prism...");
+// Ensure we work with a fresh copy
+await fs.rm(prismPath, { recursive: true, force: true });
+// FIXME: Remove “--branch v2” when Prism v2 is released to fallback to the default branch
+execSync("git clone --branch v2 https://github.com/PrismJS/prism.git prismjs", {
+	cwd: root,
+	stdio: "inherit",
+});
+
+console.log("[postinstall] Installing Prism dependencies...");
+execSync("npm install", {
+	cwd: prismPath,
+	stdio: "inherit",
+});
+
+console.log("[postinstall] Building Prism...");
+execSync("npm run build", {
+	cwd: prismPath,
+	stdio: "inherit",
+});
+
+// --- Working with plugins ---
+sourcePath = path.join(prismPath, "src/plugins");
+destPath = path.resolve(__dirname, "../plugins");
+
+async function copy () {
+	// We need { recursive: true } so the script doesn't fail if the folder already exists
+	await fs.mkdir(destPath, { recursive: true });
+
+	let plugins = await fs.readdir(sourcePath, { withFileTypes: true });
+	for (let plugin of plugins) {
+		if (!plugin.isDirectory()) {
+			continue;
+		}
+
+		let source = path.join(sourcePath, plugin.name);
+		let dest = path.join(destPath, plugin.name);
+		await fs.mkdir(dest, { recursive: true });
+
+		let files = await fs.readdir(source, { withFileTypes: true });
+		for (let file of files) {
+			if (!file.isFile()) {
+				continue;
+			}
+
+			let name = path.parse(file.name).name;
+			// Copy only the README.md and demo.* files
+			if (["README", "demo"].includes(name)) {
+				await fs.copyFile(path.join(source, file.name), path.join(dest, file.name));
+			}
+		}
+	}
+}
+
+console.log("[postinstall] Copying Prism plugins docs...");
+try {
+	await copy();
+}
+catch (error) {
+	console.error(`[postinstall] Failed to copy Prism plugins docs: ${error.message}`);
+}
+
+// Create plugins.json in the plugins folder with global data
+console.log("[postinstall] Creating plugins.json...");
+let json = {
+	permalink: "{{ page.filePathStem.replace('README', '/index') }}.html",
+	tags: ["plugin"],
+};
+
+await fs.writeFile(path.join(destPath, "plugins.json"), JSON.stringify(json, null, "\t"));
+
+// --- Copying other files (components.json, file-sizes.json, etc.) ---
+sourcePath = path.join(prismPath, "dist");
+destPath = path.resolve(__dirname, "..");
+
+let filenames = ["components.json", "file-sizes.json"];
+for (let file of filenames) {
+	console.log(`[postinstall] Copying ${file}...`);
+	try {
+		await fs.copyFile(path.join(sourcePath, file), path.join(destPath, file));
+	}
+	catch (error) {
+		console.error(`[postinstall] Failed to copy ${file}: ${error.message}`);
+	}
+}