follow proxy settings (#105)

src/installer.ts

@@ -1,9 +1,10 @@
 // Load tempDirectory before it gets wiped by tool-cache
 let tempDirectory = process.env['RUNNER_TEMPDIRECTORY'] || '';
+import * as assert from 'assert';
 import * as core from '@actions/core';
+import * as hc from '@actions/http-client';
 import * as io from '@actions/io';
 import * as tc from '@actions/tool-cache';
-import * as restm from 'typed-rest-client/RestClient';
 import * as os from 'os';
 import * as path from 'path';
 import * as semver from 'semver';
@@ -100,9 +101,17 @@ async function queryLatestMatch(versionSpec: string): Promise<string> {
 
   let versions: string[] = [];
   let dataUrl = 'https://nodejs.org/dist/index.json';
-  let rest: restm.RestClient = new restm.RestClient('setup-node');
-  let nodeVersions: INodeVersion[] =
-    (await rest.get<INodeVersion[]>(dataUrl)).result || [];
+  let httpClient = new hc.HttpClient('setup-node', [], {
+    allowRetries: true,
+    maxRetries: 3
+  });
+  let response = await httpClient.get(dataUrl);
+  assert.ok(
+    response.message.statusCode === 200,
+    `Unexpected HTTP status code '${response.message.statusCode}'`
+  );
+  let body = await response.readBody();
+  let nodeVersions = JSON.parse(body) as INodeVersion[];
   nodeVersions.forEach((nodeVersion: INodeVersion) => {
     // ensure this version supports your os and platform
     if (nodeVersion.files.indexOf(dataFileName) >= 0) {

src/setup-node.ts

@@ -14,7 +14,6 @@ async function run() {
       version = core.getInput('node-version');
     }
     if (version) {
-      // TODO: installer doesn't support proxy
       await installer.getNode(version);
     }
 
@@ -24,7 +23,6 @@ async function run() {
       auth.configAuthentication(registryUrl, alwaysAuth);
     }
 
-    // TODO: setup proxy from runner proxy config
     const matchersPath = path.join(__dirname, '..', '.github');
     console.log(`##[add-matcher]${path.join(matchersPath, 'tsc.json')}`);
     console.log(