Migrate to ESM and upgrade dependencies (#763)

* Migrate to ESM and upgrade dependencies

* Remove unused tsconfig.eslint.json

* bump version to 7.0.0 in package.json and package-lock.json

* Add ESM migration note to README for V7

* Remove unnecessary devDependencies: ts-node, @types/jest

* npm audit fix

* Update README with ESM migration details

Clarified migration details to ESM for action compatibility.

* Downgrade @types/node to ^24, clean up tsconfig and README.

src/cache-restore.ts

@@ -4,9 +4,9 @@ import * as glob from '@actions/glob';
 import path from 'path';
 import fs from 'fs';
 
-import {State, Outputs} from './constants';
-import {PackageManagerInfo} from './package-managers';
-import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils';
+import {State, Outputs} from './constants.js';
+import {PackageManagerInfo} from './package-managers.js';
+import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils.js';
 
 export const restoreCache = async (
   versionSpec: string,

src/cache-save.ts

@@ -1,8 +1,8 @@
 import * as core from '@actions/core';
 import * as cache from '@actions/cache';
 import fs from 'fs';
-import {State} from './constants';
-import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils';
+import {State} from './constants.js';
+import {getCacheDirectoryPath, getPackageManagerInfo} from './cache-utils.js';
 
 // Catch and log any unhandled exceptions.  These exceptions can leak out of the uploadChunk method in
 // @actions/toolkit when a failed upload closes the file descriptor causing any in-process reads to

src/cache-utils.ts

@@ -1,7 +1,10 @@
 import * as cache from '@actions/cache';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
-import {supportedPackageManagers, PackageManagerInfo} from './package-managers';
+import {
+  supportedPackageManagers,
+  PackageManagerInfo
+} from './package-managers.js';
 
 export const getCommandOutput = async (toolCommand: string) => {
   let {stdout, stderr, exitCode} = await exec.getExecOutput(

src/go-version-fetch.ts

@@ -0,0 +1,13 @@
+import * as httpm from '@actions/http-client';
+import type {IGoVersion} from './installer.js';
+
+export async function getVersionsDist(
+  dlUrl: string
+): Promise<IGoVersion[] | null> {
+  // this returns versions descending so latest is first
+  const http: httpm.HttpClient = new httpm.HttpClient('setup-go', [], {
+    allowRedirects: true,
+    maxRedirects: 3
+  });
+  return (await http.getJson<IGoVersion[]>(dlUrl)).result;
+}

src/installer.ts

@@ -3,13 +3,14 @@ import * as core from '@actions/core';
 import * as path from 'path';
 import * as semver from 'semver';
 import * as httpm from '@actions/http-client';
-import * as sys from './system';
+import * as sys from './system.js';
 import crypto from 'crypto';
 import cp from 'child_process';
 import fs from 'fs';
 import os from 'os';
-import {StableReleaseAlias, isSelfHosted} from './utils';
-import {Architecture} from './types';
+import {StableReleaseAlias, isSelfHosted} from './utils.js';
+import {Architecture} from './types.js';
+import {getVersionsDist} from './go-version-fetch.js';
 
 export const GOTOOLCHAIN_ENV_VAR = 'GOTOOLCHAIN';
 export const GOTOOLCHAIN_LOCAL_VAL = 'local';
@@ -167,12 +168,14 @@ export async function getGo(
       if (err instanceof tc.HTTPError && err.httpStatusCode === 404) {
         throw new Error(
           `The requested Go version ${versionSpec} is not available for platform ${osPlat}/${arch}. ` +
-            `Download URL returned HTTP 404: ${downloadUrl}`
+            `Download URL returned HTTP 404: ${downloadUrl}`,
+          {cause: err}
         );
       }
       throw new Error(
         `Failed to download Go ${versionSpec} for platform ${osPlat}/${arch} ` +
-          `from ${downloadUrl}: ${err}`
+          `from ${downloadUrl}: ${err}`,
+        {cause: err}
       );
     }
   } else {
@@ -218,7 +221,9 @@ export async function getGo(
         core.info('Install from dist');
         downloadPath = await installGoVersion(info, undefined, arch);
       } catch (err) {
-        throw new Error(`Failed to download version ${versionSpec}: ${err}`);
+        throw new Error(`Failed to download version ${versionSpec}: ${err}`, {
+          cause: err
+        });
       }
     }
   }
@@ -569,9 +574,7 @@ export async function findMatch(
   let result: IGoVersion | undefined;
   let match: IGoVersion | undefined;
 
-  const candidates: IGoVersion[] | null = await module.exports.getVersionsDist(
-    dlUrl
-  );
+  const candidates: IGoVersion[] | null = await getVersionsDist(dlUrl);
   if (!candidates) {
     throw new Error(`golang download url did not return results`);
   }
@@ -607,17 +610,6 @@ export async function findMatch(
   return result;
 }
 
-export async function getVersionsDist(
-  dlUrl: string
-): Promise<IGoVersion[] | null> {
-  // this returns versions descending so latest is first
-  const http: httpm.HttpClient = new httpm.HttpClient('setup-go', [], {
-    allowRedirects: true,
-    maxRedirects: 3
-  });
-  return (await http.getJson<IGoVersion[]>(dlUrl)).result;
-}
-
 //
 // Convert the go version syntax into semver for semver matching
 // 1.13.1 => 1.13.1
@@ -686,9 +678,8 @@ async function resolveStableVersionDist(
 ) {
   const archFilter = sys.getArch(arch);
   const platFilter = sys.getPlatform();
-  const candidates: IGoVersion[] | null = await module.exports.getVersionsDist(
-    GOLANG_DOWNLOAD_URL
-  );
+  const candidates: IGoVersion[] | null =
+    await getVersionsDist(GOLANG_DOWNLOAD_URL);
   if (!candidates) {
     throw new Error(`golang download url did not return results`);
   }

src/main.ts

@@ -1,14 +1,15 @@
 import * as core from '@actions/core';
 import * as io from '@actions/io';
-import * as installer from './installer';
+import * as installer from './installer.js';
 import * as semver from 'semver';
 import path from 'path';
-import {restoreCache} from './cache-restore';
-import {isCacheFeatureAvailable} from './cache-utils';
+import {fileURLToPath} from 'url';
+import {restoreCache} from './cache-restore.js';
+import {isCacheFeatureAvailable} from './cache-utils.js';
 import cp from 'child_process';
 import fs from 'fs';
 import os from 'os';
-import {Architecture} from './types';
+import {Architecture} from './types.js';
 
 export async function run() {
   try {
@@ -91,7 +92,11 @@ export async function run() {
     }
 
     // add problem matchers
-    const matchersPath = path.join(__dirname, '../..', 'matchers.json');
+    const matchersPath = path.join(
+      path.dirname(fileURLToPath(import.meta.url)),
+      '../..',
+      'matchers.json'
+    );
     core.info(`##[add-matcher]${matchersPath}`);
 
     // output the version actually being used

src/setup-go.ts

@@ -1,3 +1,3 @@
-import {run} from './main';
+import {run} from './main.js';
 
 run();

src/system.ts

@@ -1,5 +1,5 @@
 import os from 'os';
-import {Architecture} from './types';
+import {Architecture} from './types.js';
 
 export function getPlatform(): string {
   // darwin and linux match already