Fix setOutput

__tests__/context.test.ts

@@ -0,0 +1,32 @@
+import * as os from 'os';
+
+import * as context from '../src/context';
+
+describe('setOutput', () => {
+  beforeEach(() => {
+    process.stdout.write = jest.fn();
+  });
+
+  it('setOutput produces the correct command', () => {
+    context.setOutput('some output', 'some value');
+    assertWriteCalls([`::set-output name=some output::some value${os.EOL}`]);
+  });
+
+  it('setOutput handles bools', () => {
+    context.setOutput('some output', false);
+    assertWriteCalls([`::set-output name=some output::false${os.EOL}`]);
+  });
+
+  it('setOutput handles numbers', () => {
+    context.setOutput('some output', 1.01);
+    assertWriteCalls([`::set-output name=some output::1.01${os.EOL}`]);
+  });
+});
+
+// Assert that process.stdout.write calls called only with the given arguments.
+function assertWriteCalls(calls: string[]): void {
+  expect(process.stdout.write).toHaveBeenCalledTimes(calls.length);
+  for (let i = 0; i < calls.length; i++) {
+    expect(process.stdout.write).toHaveBeenNthCalledWith(i + 1, calls[i]);
+  }
+}

src/context.ts

@@ -1,4 +1,5 @@
 import * as core from '@actions/core';
+import {issueCommand} from '@actions/core/lib/command';
 
 export interface Inputs {
   gpgPrivateKey: string;
@@ -25,3 +26,8 @@ export async function getInputs(): Promise<Inputs> {
     workdir: core.getInput('workdir') || '.'
   };
 }
+
+// FIXME: Temp fix https://github.com/actions/toolkit/issues/777
+export function setOutput(name: string, value: any): void {
+  issueCommand('set-output', {name}, value);
+}

src/main.ts

@@ -51,10 +51,10 @@ async function run(): Promise<void> {
     }
 
     core.info('🛒 Setting outputs...');
-    core.setOutput('fingerprint', privateKey.fingerprint);
-    core.setOutput('keyid', privateKey.keyID);
-    core.setOutput('name', privateKey.name);
-    core.setOutput('email', privateKey.email);
+    context.setOutput('fingerprint', privateKey.fingerprint);
+    context.setOutput('keyid', privateKey.keyID);
+    context.setOutput('name', privateKey.name);
+    context.setOutput('email', privateKey.email);
 
     if (inputs.gitUserSigningkey) {
       core.info('🔐 Setting GPG signing keyID for this Git repository');