Option to enable corepack

README.md

@@ -138,6 +138,7 @@ If the runner is not able to access github.com, any Nodejs versions requested du
 8. [Publishing to npmjs and GPR with npm](docs/advanced-usage.md#publish-to-npmjs-and-gpr-with-npm)
 9. [Publishing to npmjs and GPR with yarn](docs/advanced-usage.md#publish-to-npmjs-and-gpr-with-yarn)
 10. [Using private packages](docs/advanced-usage.md#use-private-packages)
+11. [Enabling Corepack](docs/advanced-usage.md#enabling-corepack)
 
 ## License
 

__tests__/installer.test.ts

@@ -1253,6 +1253,44 @@ describe('setup-node', () => {
       }
     );
   });
+
+  describe('corepack flag', () => {
+    it('use corepack if specified', async () => {
+      inputs['corepack'] = 'true';
+      await main.run();
+      expect(getExecOutputSpy).toHaveBeenCalledWith(
+        'corepack',
+        ['enable'],
+        expect.anything()
+      );
+    });
+
+    it('use corepack with given package manager', async () => {
+      inputs['corepack'] = 'npm';
+      await main.run();
+      expect(getExecOutputSpy).toHaveBeenCalledWith(
+        'corepack',
+        ['enable', 'npm'],
+        expect.anything()
+      );
+    });
+
+    it('use corepack with multiple package managers', async () => {
+      inputs['corepack'] = 'npm yarn';
+      await main.run();
+      expect(getExecOutputSpy).toHaveBeenCalledWith(
+        'corepack',
+        ['enable', 'npm', 'yarn'],
+        expect.anything()
+      );
+    });
+
+    it('fails to use corepack with an invalid package manager', async () => {
+      await expect(im.enableCorepack('npm turbo')).rejects.toThrowError(
+        `One or more of the specified package managers [ npm turbo ] are not supported by corepack`
+      );
+    });
+  });
 });
 
 describe('helper methods', () => {

action.yml

@@ -25,6 +25,9 @@ inputs:
     description: 'Used to specify a package manager for caching in the default directory. Supported values: npm, yarn, pnpm.'
   cache-dependency-path:
     description: 'Used to specify the path to a dependency file: package-lock.json, yarn.lock, etc. Supports wildcards or a list of file names for caching multiple dependencies.'
+  corepack:
+    description: 'Used to specify whether to enable Corepack. Set to true to enable all package managers or set it to one or more package manager names separated by a space. Supported package manager names: npm, yarn, pnpm.'
+    default: 'false'
 # TODO: add input to control forcing to pull from cloud or dist. 
 #       escape valve for someone having issues or needing the absolute latest which isn't cached yet
 outputs: