use module

index.js

@@ -1,15 +0,0 @@
-import core from '@actions/core';
-import github from '@actions/github';
-
-try {
-    // `who-to-greet` input defined in action metadata file
-    const nameToGreet = core.getInput('who-to-greet');
-    console.log(`Hello ${nameToGreet}!`);
-    const time = (new Date()).toTimeString();
-    core.setOutput("time", time);
-    // Get the JSON webhook payload for the event that triggered the workflow
-    const payload = JSON.stringify(github.context.payload, undefined, 2)
-    console.log(`The event payload: ${payload}`);
-} catch (error) {
-    core.setFailed(error.message);
-}

package.json

@@ -2,9 +2,10 @@
   "name": "python-packs",
   "version": "1.0.0",
   "description": "",
-  "main": "index.js",
+  "type": "module",
+  "main": "src/index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "dev": "node src/index.js"
   },
   "keywords": [],
   "author": "",

src/index.js

@@ -0,0 +1,28 @@
+import core from '@actions/core';
+import github from '@actions/github';
+import execSync from 'child_process';
+
+function ensure_pip() {
+    // call "python3 -m ensurepip"
+    execSync('python3 -m ensurepip');
+}
+
+function greeting() {
+    try {
+        // `who-to-greet` input defined in action metadata file
+        const nameToGreet = core.getInput('who-to-greet');
+        console.log(`Hello ${nameToGreet}!`);
+        const time = (new Date()).toTimeString();
+        core.setOutput("time", time);
+        // Get the JSON webhook payload for the event that triggered the workflow
+        const payload = JSON.stringify(github.context.payload, undefined, 2)
+        console.log(`The event payload: ${payload}`);
+    } catch (error) {
+        core.setFailed(error.message);
+    }
+}
+
+function main() {
+    greeting();
+    ensure_pip();
+}