Add missing project_id input (#50)

This GitHub action is missing the common `project_id` input - I ran into
this while trying to setup a deployment workflow on one of my
repositories.

I added the missing input and then updated the README to reflect it.

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---------

Co-authored-by: henrybell <[email protected]>

Author: aelawson

README.md

@@ -163,6 +163,8 @@ jobs:
     used. This is the equivalent of running 'gcloud alpha run' or 'gcloud beta
     run'. Valid values are `alpha` or `beta`.
 
+-   `project_id`: (Optional) ID of the Google Cloud project in which to deploy the service. The default value is computed from the environment.
+
 ## Outputs
 
 -   `name`: The full name of the release in Cloud Deploy, including project and

action.yml

@@ -84,6 +84,11 @@ inputs:
       Additional parameters to supply at release creation time.
     required: false
 
+  project_id:
+    description: |-
+      The Google Cloud Project ID. If unset, this is inherited from the environment.
+    required: false
+
   flags:
     description: |-
       Space separated list of other Cloud Deploy flags, examples can be found:

src/main.ts

@@ -77,10 +77,13 @@ export async function run(): Promise<void> {
     // Core inputs (required)
     const name = getInput('name');
     const deliveryPipeline = getInput('delivery_pipeline');
-    const region = getInput('region');
     const source = getInput('source');
     const buildArtifacts = getInput('build_artifacts');
     const images = parseKVString(getInput('images'));
+
+    // Common inputs
+    const projectId = getInput('project_id');
+    const region = getInput('region');
     const disableInitialRollout = getBooleanInput('disable_initial_rollout');
     const sourceStagingDir = getInput('gcs_source_staging_dir');
     const skaffoldFile = getInput('skaffold_file');
@@ -114,6 +117,9 @@ export async function run(): Promise<void> {
     // Build base command from required inputs
     let cmd = ['deploy', 'releases', 'create', name, '--delivery-pipeline', deliveryPipeline];
 
+    if (projectId) {
+      cmd.push('--project', projectId);
+    }
     if (region) {
       cmd.push('--region', region);
     } else {

tests/unit/main.test.ts

@@ -30,6 +30,7 @@ import { run } from '../../src/main';
 const fakeInputs = {
   delivery_pipeline: 'delivery-pipeline',
   name: 'release-001',
+  project_id: '',
   region: 'us-central1',
   source: 'src',
   build_artifacts: 'artifacts.json',
@@ -169,6 +170,19 @@ describe('#run', async () => {
     assert.rejects(run, 'Both `build_artifacts` and `images` inputs set - please select only one.');
   });
 
+  it('sets project if given', async (t) => {
+    const mocks = defaultMocks(t.mock, {
+      project_id: 'my-test-project',
+    });
+
+    await run();
+
+    expectSubArray(mocks.getExecOutput.mock.calls?.at(0)?.arguments?.at(1), [
+      '--project',
+      'my-test-project',
+    ]);
+  });
+
   it('sets region if given', async (t) => {
     const mocks = defaultMocks(t.mock, {
       region: 'europe-west1',