Convert project to ESM and update dependencies (#854)

- Switch to esbuild for bundling
- Update npm dependency version
- Add require header for compat with older JS libs

sources/src/caching/gradle-user-home-utils.ts

@@ -1,9 +1,11 @@
 import path from 'path'
 import fs from 'fs'
+import {fileURLToPath} from 'url'
 
 export function readResourceFileAsString(...paths: string[]): string {
     // Resolving relative to __dirname will allow node to find the resource at runtime
-    const absolutePath = path.resolve(__dirname, '..', '..', '..', 'sources', 'src', 'resources', ...paths)
+    const moduleDir = path.dirname(fileURLToPath(import.meta.url))
+    const absolutePath = path.resolve(moduleDir, '..', '..', '..', 'sources', 'src', 'resources', ...paths)
     return fs.readFileSync(absolutePath, 'utf8')
 }
 

sources/src/configuration.ts

@@ -2,11 +2,11 @@ import * as core from '@actions/core'
 import * as github from '@actions/github'
 import * as cache from '@actions/cache'
 import * as deprecator from './deprecation-collector'
-import {SUMMARY_ENV_VAR} from '@actions/core/lib/summary'
 
-import path from 'path'
+import * as path from 'path'
 
 const ACTION_ID_VAR = 'GRADLE_ACTION_ID'
+const SUMMARY_ENV_VAR = 'GITHUB_STEP_SUMMARY'
 
 export const ACTION_METADATA_DIR = '.setup-gradle'