refactor: move volta logic

__tests__/installer.test.ts

@@ -560,7 +560,7 @@ describe('setup-node', () => {
       expect(parseNodeVersionSpy).toHaveBeenCalledTimes(0);
     });
 
-    it('reads node-version-file if provided', async () => {
+    it('reads node-version-file if provided (.nvmrc)', async () => {
       // Arrange
       const versionSpec = 'v14';
       const versionFile = '.nvmrc';
@@ -572,6 +572,7 @@ describe('setup-node', () => {
       existsSpy.mockImplementationOnce(
         input => input === path.join(__dirname, 'data', versionFile)
       );
+
       // Act
       await main.run();
 
@@ -584,22 +585,37 @@ describe('setup-node', () => {
       );
     });
 
-    it('reads node-version-file if provided with volta', async () => {
+    it('reads node-version-file if provided (package.json, volta)', async () => {
       // Arrange
-      const expectedVersionSpec = '16.15.1';
+      const versionSpec = `{
+  "name": "test",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "test": "echo test"
+  },
+  "volta": {
+    "node": "16.15.1"
+  }
+}
+`;
       const versionFile = 'package.json';
+      const expectedVersionSpec = '16.15.1';
       process.env['GITHUB_WORKSPACE'] = path.join(__dirname, 'data');
-      inputs['node-version-file'] = 'volta';
+      inputs['node-version-file'] = versionFile;
 
+      parseNodeVersionSpy.mockImplementation(() => expectedVersionSpec);
       existsSpy.mockImplementationOnce(
         input => input === path.join(__dirname, 'data', versionFile)
       );
+
       // Act
       await main.run();
 
       // Assert
       expect(existsSpy).toHaveBeenCalledTimes(1);
       expect(existsSpy).toHaveReturnedWith(true);
+      expect(parseNodeVersionSpy).toHaveBeenCalledWith(versionSpec);
       expect(logSpy).toHaveBeenCalledWith(
         `Resolved ${versionFile} as ${expectedVersionSpec}`
       );

dist/setup/index.js

@@ -71768,7 +71768,13 @@ function translateArchToDistUrl(arch) {
     }
 }
 function parseNodeVersionFile(contents) {
-    let nodeVersion = contents.trim();
+    let nodeVersion;
+    if (contents.includes('volta')) {
+        nodeVersion = JSON.parse(contents).volta.node;
+    }
+    else {
+        nodeVersion = contents.trim();
+    }
     if (/^v\d/.test(nodeVersion)) {
         nodeVersion = nodeVersion.substring(1);
     }
@@ -71862,8 +71868,7 @@ function run() {
 exports.run = run;
 function resolveVersionInput() {
     let version = core.getInput('node-version');
-    const nodeVersionFile = core.getInput('node-version-file');
-    const versionFileInput = nodeVersionFile === 'volta' ? 'package.json' : nodeVersionFile;
+    const versionFileInput = core.getInput('node-version-file');
     if (version && versionFileInput) {
         core.warning('Both node-version and node-version-file inputs are specified, only node-version will be used');
     }
@@ -71875,12 +71880,7 @@ function resolveVersionInput() {
         if (!fs_1.default.existsSync(versionFilePath)) {
             throw new Error(`The specified node version file at: ${versionFilePath} does not exist`);
         }
-        if (nodeVersionFile === 'volta') {
-            version = JSON.parse(fs_1.default.readFileSync(versionFilePath, 'utf8')).volta.node;
-        }
-        else {
-            version = installer.parseNodeVersionFile(fs_1.default.readFileSync(versionFilePath, 'utf8'));
-        }
+        version = installer.parseNodeVersionFile(fs_1.default.readFileSync(versionFilePath, 'utf8'));
         core.info(`Resolved ${versionFileInput} as ${version}`);
     }
     return version;

src/installer.ts

@@ -495,7 +495,13 @@ function translateArchToDistUrl(arch: string): string {
 }
 
 export function parseNodeVersionFile(contents: string): string {
-  let nodeVersion = contents.trim();
+  let nodeVersion;
+
+  if (contents.includes('volta')) {
+    nodeVersion = JSON.parse(contents).volta.node;
+  } else {
+    nodeVersion = contents.trim();
+  }
 
   if (/^v\d/.test(nodeVersion)) {
     nodeVersion = nodeVersion.substring(1);

src/main.ts

@@ -65,9 +65,7 @@ export async function run() {
 
 function resolveVersionInput(): string {
   let version = core.getInput('node-version');
-  const nodeVersionFile = core.getInput('node-version-file');
-  const versionFileInput =
-    nodeVersionFile === 'volta' ? 'package.json' : nodeVersionFile;
+  const versionFileInput = core.getInput('node-version-file');
 
   if (version && versionFileInput) {
     core.warning(
@@ -91,13 +89,9 @@ function resolveVersionInput(): string {
       );
     }
 
-    if (nodeVersionFile === 'volta') {
-      version = JSON.parse(fs.readFileSync(versionFilePath, 'utf8')).volta.node;
-    } else {
-      version = installer.parseNodeVersionFile(
-        fs.readFileSync(versionFilePath, 'utf8')
-      );
-    }
+    version = installer.parseNodeVersionFile(
+      fs.readFileSync(versionFilePath, 'utf8')
+    );
 
     core.info(`Resolved ${versionFileInput} as ${version}`);
   }