feat: update action to nodejs (#1159)

Co-authored-by: Tonye Jack <jtonye@ymail.com>
Co-authored-by: GitHub Action <action@github.com>

src/env.ts

@@ -0,0 +1,60 @@
+import {promises as fs} from 'fs'
+import * as core from '@actions/core'
+
+export type Env = {
+  GITHUB_EVENT_PULL_REQUEST_HEAD_REF: string
+  GITHUB_EVENT_PULL_REQUEST_BASE_REF: string
+  GITHUB_EVENT_BEFORE: string
+  GITHUB_REFNAME: string
+  GITHUB_REF: string
+  GITHUB_EVENT_BASE_REF: string
+  GITHUB_EVENT_HEAD_REPO_FORK: string
+  GITHUB_WORKSPACE: string
+  GITHUB_EVENT_FORCED: string
+  GITHUB_EVENT_PULL_REQUEST_NUMBER: string
+  GITHUB_EVENT_PULL_REQUEST_BASE_SHA: string
+}
+
+type GithubEvent = {
+  forced?: string
+  pull_request?: {
+    head: {
+      ref: string
+    }
+    base: {
+      ref: string
+      sha: string
+    }
+    number: string
+  }
+  before?: string
+  base_ref?: string
+  head_repo?: {
+    fork: string
+  }
+}
+
+export const getEnv = async (): Promise<Env> => {
+  const eventPath = process.env.GITHUB_EVENT_PATH
+  let eventJson: GithubEvent = {}
+
+  if (eventPath) {
+    eventJson = JSON.parse(await fs.readFile(eventPath, {encoding: 'utf8'}))
+  }
+
+  core.debug(`Event: ${JSON.stringify(eventJson, null, 2)}`)
+
+  return {
+    GITHUB_EVENT_PULL_REQUEST_HEAD_REF: eventJson.pull_request?.head?.ref || '',
+    GITHUB_EVENT_PULL_REQUEST_BASE_REF: eventJson.pull_request?.base?.ref || '',
+    GITHUB_EVENT_BEFORE: eventJson.before || '',
+    GITHUB_EVENT_BASE_REF: eventJson.base_ref || '',
+    GITHUB_EVENT_HEAD_REPO_FORK: eventJson.head_repo?.fork || '',
+    GITHUB_EVENT_PULL_REQUEST_NUMBER: eventJson.pull_request?.number || '',
+    GITHUB_EVENT_PULL_REQUEST_BASE_SHA: eventJson.pull_request?.base?.sha || '',
+    GITHUB_EVENT_FORCED: eventJson.forced || '',
+    GITHUB_REFNAME: process.env.GITHUB_REFNAME || '',
+    GITHUB_REF: process.env.GITHUB_REF || '',
+    GITHUB_WORKSPACE: process.env.GITHUB_WORKSPACE || ''
+  }
+}