Add auth support (#21)

* Updates

* Update

* Update

* Update

* Update

* Yarn sometimes prefers npmrc, so use same token

* Description

* Update readme

* Feedback

* Add type

* new toolkit and scoped registries

* npmrc in RUNNER_TEMP

* Dont always auth

* Try exporting blank token

* Get auth working for now pending runner changes

* Fix string interpolation for auth token.

* Don't export both userconfigs

* Update authutil.js

* Add single quotes for authString

* Fix the registry string.

* Use userconfig and append trailing slash

* Keep in root of repo

* Try just adding auth token

* Remove auth token

* Try changes again

* Add tests

* Npm and GPR samples

* Add types

src/authutil.ts

@@ -0,0 +1,50 @@
+import * as fs from 'fs';
+import * as os from 'os';
+import * as path from 'path';
+import * as core from '@actions/core';
+import * as github from '@actions/github';
+
+export function configAuthentication(registryUrl: string) {
+  const npmrc: string = path.resolve(
+    process.env['RUNNER_TEMP'] || process.cwd(),
+    '.npmrc'
+  );
+  if (!registryUrl.endsWith('/')) {
+    registryUrl += '/';
+  }
+
+  writeRegistryToFile(registryUrl, npmrc);
+}
+
+function writeRegistryToFile(registryUrl: string, fileLocation: string) {
+  let scope: string = core.getInput('scope');
+  if (!scope && registryUrl.indexOf('npm.pkg.github.com') > -1) {
+    scope = github.context.repo.owner;
+  }
+  if (scope && scope[0] != '@') {
+    scope = '@' + scope;
+  }
+
+  core.debug(`Setting auth in ${fileLocation}`);
+  let newContents: string = '';
+  if (fs.existsSync(fileLocation)) {
+    const curContents: string = fs.readFileSync(fileLocation, 'utf8');
+    curContents.split(os.EOL).forEach((line: string) => {
+      // Add current contents unless they are setting the registry
+      if (!line.toLowerCase().startsWith('registry')) {
+        newContents += line + os.EOL;
+      }
+    });
+  }
+  // Remove http: or https: from front of registry.
+  const authString: string =
+    registryUrl.replace(/(^\w+:|^)/, '') + ':_authToken=${NODE_AUTH_TOKEN}';
+  const registryString: string = scope
+    ? `${scope}:registry=${registryUrl}`
+    : `registry=${registryUrl}`;
+  newContents += `${authString}${os.EOL}${registryString}`;
+  fs.writeFileSync(fileLocation, newContents);
+  core.exportVariable('NPM_CONFIG_USERCONFIG', fileLocation);
+  // Export empty node_auth_token so npm doesn't complain about not being able to find it
+  core.exportVariable('NODE_AUTH_TOKEN', 'XXXXX-XXXXX-XXXXX-XXXXX');
+}

src/setup-node.ts

@@ -1,5 +1,6 @@
 import * as core from '@actions/core';
 import * as installer from './installer';
+import * as auth from './authutil';
 import * as path from 'path';
 
 async function run() {
@@ -14,6 +15,11 @@ async function run() {
       await installer.getNode(version);
     }
 
+    const registryUrl: string = core.getInput('registry-url');
+    if (registryUrl) {
+      auth.configAuthentication(registryUrl);
+    }
+
     // TODO: setup proxy from runner proxy config
     const matchersPath = path.join(__dirname, '..', '.github');
     console.log(`##[add-matcher]${path.join(matchersPath, 'tsc.json')}`);