make octokit follow proxy setting.

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "checkout",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -929,6 +929,11 @@
       "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==",
       "dev": true
     },
+    "agent-base": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-5.1.1.tgz",
+      "integrity": "sha512-TMeqbNl2fMW0nMjTEPOwe3J/PRFP4vqeoNuQMG0HlMrtm5QxKqdvAkZ1pRBQ/ulIyDD5Yq0nJ7YbdD8ey0TO3g=="
+    },
     "ajv": {
       "version": "6.10.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
@@ -1707,7 +1712,6 @@
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
       "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
-      "dev": true,
       "requires": {
         "ms": "^2.1.1"
       }
@@ -3670,6 +3674,15 @@
         "sshpk": "^1.7.0"
       }
     },
+    "https-proxy-agent": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-4.0.0.tgz",
+      "integrity": "sha512-zoDhWrkR3of1l9QAL8/scJZyLu8j/gBkcwcaQOZh7Gyh/+uJQzGVETdgT30akuwkpL8HTRfssqI3BZuV18teDg==",
+      "requires": {
+        "agent-base": "5",
+        "debug": "4"
+      }
+    },
     "iconv-lite": {
       "version": "0.4.24",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -4985,8 +4998,7 @@
     "ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
+      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
-      "dev": true
     },
     "mute-stream": {
       "version": "0.0.7",

package.json

@@ -34,6 +34,7 @@
     "@actions/github": "^2.0.0",
     "@actions/io": "^1.0.1",
     "@actions/tool-cache": "^1.1.2",
+    "https-proxy-agent": "^4.0.0",
     "uuid": "^3.3.3"
   },
   "devDependencies": {

src/github-api-helper.ts

@@ -8,6 +8,7 @@ import * as retryHelper from './retry-helper'
 import * as toolCache from '@actions/tool-cache'
 import {default as uuid} from 'uuid/v4'
 import {ReposGetArchiveLinkParams} from '@octokit/rest'
+import HttpsProxyAgent from 'https-proxy-agent'
 
 const IS_WINDOWS = process.platform === 'win32'
 
@@ -74,7 +75,7 @@ async function downloadArchive(
   ref: string,
   commit: string
 ): Promise<Buffer> {
-  const octokit = new github.GitHub(authToken)
+  const octokit = createOctokit(authToken)
   const params: ReposGetArchiveLinkParams = {
     owner: owner,
     repo: repo,
@@ -90,3 +91,38 @@ async function downloadArchive(
 
   return Buffer.from(response.data) // response.data is ArrayBuffer
 }
+
+function createOctokit(authToken: string): github.GitHub {
+  let proxyVar: string =
+    process.env['https_proxy'] || process.env['HTTPS_PROXY'] || ''
+
+  if (!proxyVar) {
+    return new github.GitHub(authToken)
+  }
+
+  let noProxy: string = process.env['no_proxy'] || process.env['NO_PROXY'] || ''
+
+  let bypass: boolean = false
+  if (noProxy) {
+    let bypassList = noProxy.split(',')
+    for (let i = 0; i < bypassList.length; i++) {
+      let item = bypassList[i]
+      if (
+        item &&
+        typeof item === 'string' &&
+        item.trim().toLocaleLowerCase() === 'github.com'
+      ) {
+        bypass = true
+        break
+      }
+    }
+  }
+
+  if (bypass) {
+    return new github.GitHub(authToken)
+  } else {
+    return new github.GitHub(authToken, {
+      request: {agent: new HttpsProxyAgent(proxyVar)}
+    })
+  }
+}