Merge b0f1a15a39 into 802632921f

.github/workflows/versions.yml

@@ -159,7 +159,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest, macos-13]
         node-version-file:
-          [.nvmrc, .tool-versions, .tool-versions-node, package.json]
+          [.nvmrc, .tool-versions, .tool-versions-node, package.json, .npmrc]
     steps:
       - uses: actions/checkout@v4
       - name: Setup node from node version file

__tests__/data/.npmrc

@@ -0,0 +1 @@
+use-node-version=20.0.0

__tests__/main.test.ts

@@ -103,10 +103,13 @@ describe('main tests', () => {
       ${''}                                        | ${''}
       ${'unknown format'}                          | ${'unknown format'}
       ${'  14.1.0  '}                              | ${'14.1.0'}
+      ${'use-node-version=lts/iron'}               | ${'lts/iron'}
       ${'{"volta": {"node": ">=14.0.0 <=17.0.0"}}'}| ${'>=14.0.0 <=17.0.0'}
       ${'{"volta": {"extends": "./package.json"}}'}| ${'18.0.0'}
       ${'{"engines": {"node": "17.0.0"}}'}         | ${'17.0.0'}
       ${'{}'}                                      | ${null}
+      ${'[section]use-node-version=16'}            | ${null}
+      ${'[section]\nuse-node-version=20'}          | ${null}
     `.it('parses "$contents"', ({contents, expected}) => {
       const existsSpy = jest.spyOn(fs, 'existsSync');
       existsSpy.mockImplementation(() => true);

package.json

@@ -33,6 +33,7 @@
     "@actions/http-client": "^2.2.1",
     "@actions/io": "^1.0.2",
     "@actions/tool-cache": "^2.0.1",
+    "ini": "^5.0.0",
     "semver": "^7.6.3",
     "uuid": "^9.0.1"
   },

src/ini.d.ts

@@ -0,0 +1,3 @@
+declare module 'ini' {
+  function parse(ini: string): Record<string, string | object>;
+}

src/util.ts

@@ -3,6 +3,7 @@ import * as exec from '@actions/exec';
 import * as io from '@actions/io';
 
 import fs from 'fs';
+import * as INI from 'ini';
 import path from 'path';
 
 export function getNodeVersionFromFile(versionFilePath: string): string | null {
@@ -56,6 +57,25 @@ export function getNodeVersionFromFile(versionFilePath: string): string | null {
     core.info('Node version file is not JSON file');
   }
 
+  // Try parsing the file as an NPM `.npmrc` file.
+  //
+  // If the file contents contain the use-node-version key, we conclude it's an
+  // `.npmrc` file.
+  if (contents.match(/use-node-version *=/)) {
+    const manifest = INI.parse(contents);
+    const key = 'use-node-version';
+
+    if (key in manifest && typeof manifest[key] === 'string') {
+      const version = manifest[key];
+      core.info(`Using node version ${version} from global INI ${key}`);
+      return version;
+    }
+
+    // We didn't find the key `use-node-version` in the global scope of the
+    // `.npmrc` file, so we return.
+    return null;
+  }
+
   const found = contents.match(/^(?:node(js)?\s+)?v?(?<version>[^\s]+)$/m);
   return found?.groups?.version ?? contents.trim();
 }