update workflow to require sha input and add test workflow

Author: leighmcculloch

.github/workflows/build.yml

@@ -10,9 +10,9 @@ on:
   workflow_call:
     inputs:
       sha:
-        description: "Quickstart sha/ref to build (use main for latest)"
+        description: "Quickstart sha to build"
         type: "string"
-        default: "main"
+        required: true
       image_json:
         description: "A custom image.json (a single image from the same format as images.json)"
         type: "string"
@@ -35,7 +35,7 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  sha: ${{ github.event.pull_request.head.sha || github.sha }}
+  sha: ${{ inputs.sha || github.event.pull_request.head.sha || github.sha }}
   image_repo: ${{ format('{0}/{1}', secrets.DOCKERHUB_TOKEN && 'docker.io' || 'ghcr.io', github.repository) }}
   # Cache ID is a value inserted into cache keys. Whenever changing the build
   # in a way that needs to use entirely new fresh builds, increment the number

.github/workflows/workflow-test.yml

@@ -0,0 +1,28 @@
+name: Workflow Call Test
+
+on:
+  push:
+
+jobs:
+
+  build-custom:
+    uses: ./.github/workflows/build.yml
+    with:
+      sha: ${{ github.event.pull_request.head.sha || github.sha }}
+      test: true
+      image_json: |
+        {
+          "tag": "custom",
+          "config": {
+            "protocol_version_default": 23
+          },
+          "deps": [
+            { "name": "xdr", "repo": "stellar/rs-stellar-xdr", "ref": "v23.0.0" },
+            { "name": "core", "repo": "stellar/stellar-core", "ref": "v23.0.1", "options": { "configure_flags": "--disable-tests" } },
+            { "name": "rpc", "repo": "stellar/stellar-rpc", "ref": "v23.0.1" },
+            { "name": "horizon", "repo": "stellar/go", "ref": "horizon-v23.0.0" },
+            { "name": "friendbot", "repo": "stellar/go", "ref": "horizon-v23.0.0" },
+            { "name": "lab", "repo": "stellar/laboratory", "ref": "main" }
+          ],
+          "additional-tests": []
+        }