[command] npm run release

__tests__/client.test.ts

@@ -36,6 +36,8 @@ describe('8398a7/action-slack', () => {
   beforeEach(() => {
     process.env.GITHUB_REPOSITORY = '8398a7/action-slack';
     process.env.GITHUB_EVENT_NAME = 'push';
+    process.env.https_proxy = 'http://localhost:1334';
+    process.env.HTTPS_PROXY = 'http://localhost:1334';
     const github = require('@actions/github');
     github.context.payload = {};
   });

package.json

@@ -1,6 +1,6 @@
 {
   "name": "action-slack",
-  "version": "3.9.3",
+  "version": "3.10.0",
   "description": "You can notify slack of GitHub Actions.",
   "main": "lib/main.js",
   "scripts": {
@@ -32,6 +32,7 @@
     "@actions/core": "^1.4.0",
     "@actions/github": "^5.0.0",
     "@slack/webhook": "^6.0.0",
+    "https-proxy-agent": "^5.0.0",
     "semver": "^7.3.5"
   },
   "devDependencies": {

src/client.ts

@@ -1,8 +1,13 @@
 import * as core from '@actions/core';
 import { context, getOctokit } from '@actions/github';
 import { GitHub } from '@actions/github/lib/utils';
-import { IncomingWebhook, IncomingWebhookSendArguments } from '@slack/webhook';
+import {
+  IncomingWebhook,
+  IncomingWebhookSendArguments,
+  IncomingWebhookDefaultArguments,
+} from '@slack/webhook';
 import { FieldFactory } from './fields';
+import { HttpsProxyAgent } from 'https-proxy-agent';
 
 export const Success = 'success';
 type SuccessType = 'success';
@@ -58,7 +63,14 @@ export class Client {
     if (webhookUrl === undefined || webhookUrl === null || webhookUrl === '') {
       throw new Error('Specify secrets.SLACK_WEBHOOK_URL');
     }
-    this.webhook = new IncomingWebhook(webhookUrl);
+
+    const options: IncomingWebhookDefaultArguments = {};
+    const proxy = process.env.https_proxy || process.env.HTTPS_PROXY;
+    if (proxy) {
+      options.agent = new HttpsProxyAgent(proxy);
+    }
+
+    this.webhook = new IncomingWebhook(webhookUrl, options);
     this.fieldFactory = new FieldFactory(
       this.with.fields,
       this.jobName,