Add setting for always-auth

- https://docs.npmjs.com/misc/config#always-auth
- Allow private repos for stuff like artifactory to work

action.yml

@@ -2,6 +2,9 @@ name: 'Setup Node.js environment'
 description: 'Setup a Node.js environment and add it to the PATH, additionally providing proxy support'
 author: 'GitHub'
 inputs:
+  always-auth:
+    description: 'Set always-auth in npmrc'
+    default: 'false'
   node-version:
     description: 'Version Spec of the version to use.  Examples: 10.x, 10.15.1, >=10.15.0'
     default: '10.x'

lib/authutil.js

@@ -12,15 +12,15 @@ const os = __importStar(require("os"));
 const path = __importStar(require("path"));
 const core = __importStar(require("@actions/core"));
 const github = __importStar(require("@actions/github"));
-function configAuthentication(registryUrl) {
+function configAuthentication({ registryUrl, alwaysAuth }) {
     const npmrc = path.resolve(process.env['RUNNER_TEMP'] || process.cwd(), '.npmrc');
     if (!registryUrl.endsWith('/')) {
         registryUrl += '/';
     }
-    writeRegistryToFile(registryUrl, npmrc);
+    writeRegistryToFile({ registryUrl, fileLocation: npmrc, alwaysAuth });
 }
 exports.configAuthentication = configAuthentication;
-function writeRegistryToFile(registryUrl, fileLocation) {
+function writeRegistryToFile({ registryUrl, fileLocation, alwaysAuth }) {
     let scope = core.getInput('scope');
     if (!scope && registryUrl.indexOf('npm.pkg.github.com') > -1) {
         scope = github.context.repo.owner;
@@ -47,7 +47,8 @@ function writeRegistryToFile(registryUrl, fileLocation) {
     const registryString = scope
         ? `${scope}:registry=${registryUrl}`
         : `registry=${registryUrl}`;
-    newContents += `${authString}${os.EOL}${registryString}`;
+    const alwaysAuthString = `always-auth=${alwaysAuth}`;
+    newContents += `${authString}${os.EOL}${registryString}${os.EOL}${alwaysAuthString}`;
     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

lib/setup-node.js

@@ -35,8 +35,9 @@ function run() {
                 yield installer.getNode(version);
             }
             const registryUrl = core.getInput('registry-url');
+            const alwaysAuth = core.getInput('always-auth');
             if (registryUrl) {
-                auth.configAuthentication(registryUrl);
+                auth.configAuthentication({ registryUrl, alwaysAuth });
             }
             // TODO: setup proxy from runner proxy config
             const matchersPath = path.join(__dirname, '..', '.github');

src/authutil.ts

@@ -4,7 +4,14 @@ import * as path from 'path';
 import * as core from '@actions/core';
 import * as github from '@actions/github';
 
-export function configAuthentication(registryUrl: string) {
+interface ConfigureAuthenticationParams {
+  registryUrl: string;
+  alwaysAuth: string;
+}
+export function configAuthentication({
+  registryUrl,
+  alwaysAuth
+}: ConfigureAuthenticationParams) {
   const npmrc: string = path.resolve(
     process.env['RUNNER_TEMP'] || process.cwd(),
     '.npmrc'
@@ -13,10 +20,19 @@ export function configAuthentication(registryUrl: string) {
     registryUrl += '/';
   }
 
-  writeRegistryToFile(registryUrl, npmrc);
+  writeRegistryToFile({registryUrl, fileLocation: npmrc, alwaysAuth});
 }
 
-function writeRegistryToFile(registryUrl: string, fileLocation: string) {
+interface WriteRegistryToFileParams {
+  registryUrl: string;
+  fileLocation: string;
+  alwaysAuth: string;
+}
+function writeRegistryToFile({
+  registryUrl,
+  fileLocation,
+  alwaysAuth
+}: WriteRegistryToFileParams) {
   let scope: string = core.getInput('scope');
   if (!scope && registryUrl.indexOf('npm.pkg.github.com') > -1) {
     scope = github.context.repo.owner;
@@ -45,7 +61,8 @@ function writeRegistryToFile(registryUrl: string, fileLocation: string) {
   const registryString: string = scope
     ? `${scope}:registry=${registryUrl}`
     : `registry=${registryUrl}`;
-  newContents += `${authString}${os.EOL}${registryString}`;
+  const alwaysAuthString: string = `always-auth=${alwaysAuth}`;
+  newContents += `${authString}${os.EOL}${registryString}${os.EOL}${alwaysAuthString}`;
   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

src/setup-node.ts

@@ -19,8 +19,9 @@ async function run() {
     }
 
     const registryUrl: string = core.getInput('registry-url');
+    const alwaysAuth: string = core.getInput('always-auth');
     if (registryUrl) {
-      auth.configAuthentication(registryUrl);
+      auth.configAuthentication({registryUrl, alwaysAuth});
     }
 
     // TODO: setup proxy from runner proxy config