Added executable script plugin code (#2)

Author: Thejus-Paul

.nvmrc

@@ -0,0 +1 @@
+18.16.1

README.md

@@ -1,2 +1,3 @@
 # rollup-plugin-executable-script
+
 A plugin to tell system to use node interpreter and provide executable permissions to the output file.

lib/rollup-plugin-executable-script.js

@@ -0,0 +1,18 @@
+import fs from "fs";
+
+const executableScript = async () => {
+  let executableScriptPath = "";
+
+  return {
+    name: "executableScript",
+    renderChunk: (code) => `#!/usr/bin/env node\n${code}`,
+    generateBundle({ file }) {
+      executableScriptPath = file;
+    },
+    writeBundle() {
+      fs.chmodSync(executableScriptPath, 0o755);
+    },
+  };
+};
+
+export default executableScript;

package.json

@@ -0,0 +1,52 @@
+{
+  "name": "rollup-plugin-executable-script",
+  "version": "1.0.0",
+  "description": "A plugin to tell system to use node interpreter and provide executable permissions to the output file.",
+  "license": "MIT",
+  "author": "Thejus Paul",
+  "homepage": "https://github.com/Thejus-Paul/rollup-plugin-executable-script",
+  "bugs": "https://github.com/Thejus-Paul/rollup-plugin-executable-script/issues",
+  "main": "./dist/index.cjs.js",
+  "module": "./dist/index.js",
+  "type": "module",
+  "types": "./types/index.d.ts",
+  "exports": {
+    "default": "./dist/index.cjs.js",
+    "import": "./dist/index.js",
+    "types": "./types/index.d.ts"
+  },
+  "engines": {
+    "node": ">=16.0.0"
+  },
+  "scripts": {
+    "build": "rollup -c"
+  },
+  "files": [
+    "dist",
+    "types",
+    "README.md",
+    "LICENSE"
+  ],
+  "keywords": [
+    "rollup-plugin",
+    "executable",
+    "script"
+  ],
+  "peerDependencies": {
+    "rollup": "^2.78.0||^3.0.0"
+  },
+  "peerDependenciesMeta": {
+    "rollup": {
+      "optional": true
+    }
+  },
+  "devDependencies": {
+    "@rollup/plugin-babel": "6.0.3",
+    "@rollup/plugin-commonjs": "25.0.2",
+    "@rollup/plugin-json": "6.0.0",
+    "@rollup/plugin-node-resolve": "15.1.0",
+    "rollup": "3.25.3",
+    "rollup-plugin-analyzer": "4.0.0",
+    "rollup-plugin-cleaner": "1.0.0"
+  }
+}