feat: Migrate codebase from CommonJS to ES modules

package.json

@@ -2,6 +2,7 @@
   "name": "setup-kosli-cli",
   "version": "1.0.0",
   "description": "Sets up the Kosli CLI for GitHub Actions runners",
+  "type": "module",
   "main": "dist/index.js",
   "scripts": {
     "test": "ava",

src/download.js

@@ -1,5 +1,4 @@
-const path = require("path");
-const github = require("@actions/github");
+import * as github from "@actions/github";
 
 // Map node arch to arch in download url
 // arch in [arm, x32, x64...] (https://nodejs.org/api/os.html#os_os_arch)
@@ -23,13 +22,13 @@ function mapOS(os) {
   return mappings[os] || os;
 }
 
-function getDownloadUrl({ version, platform, arch }) {
+export function getDownloadUrl({ version, platform, arch }) {
   const filename = `kosli_${version}_${mapOS(platform)}_${mapArch(arch)}`;
   const extension = platform === "win32" ? "zip" : "tar.gz";
   return `https://github.com/kosli-dev/cli/releases/download/v${version}/${filename}.${extension}`;
 }
 
-async function resolveVersion(version, token, octokit) {
+export async function resolveVersion(version, token, octokit) {
   if (version !== "latest") {
     return version;
   }
@@ -46,5 +45,3 @@ async function resolveVersion(version, token, octokit) {
   const tag = release.data.tag_name;
   return tag.startsWith("v") ? tag.slice(1) : tag;
 }
-
-module.exports = { getDownloadUrl, resolveVersion };

src/index.js

@@ -1,8 +1,7 @@
-const path = require("path");
-const os = require("os");
-const core = require("@actions/core");
-const tc = require("@actions/tool-cache");
-const { getDownloadUrl, resolveVersion } = require("./download");
+import os from "os";
+import * as core from "@actions/core";
+import * as tc from "@actions/tool-cache";
+import { getDownloadUrl, resolveVersion } from "./download.js";
 
 async function setup() {
   try {
@@ -32,8 +31,4 @@ async function setup() {
   }
 }
 
-module.exports = setup;
-
-if (require.main === module) {
-  setup();
-}
+setup();

test/download.test.js

@@ -1,5 +1,5 @@
-const test = require("ava");
-const { getDownloadUrl, resolveVersion } = require("../src/download");
+import test from "ava";
+import { getDownloadUrl, resolveVersion } from "../src/download.js";
 
 const baseUrl = "https://github.com/kosli-dev/cli/releases/download/";
 const testCases = [