fix(github-deployments): handle deployments without commits

Signed-off-by: Phil Kuang <pkuang@factset.com>

.changeset/two-cameras-repeat.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-github-deployments': patch
+---
+
+Handle deployments without a commit

plugins/github-deployments/src/api/index.ts

@@ -60,7 +60,7 @@ export type GithubDeployment = {
   commit: {
     abbreviatedOid: string;
     commitUrl: string;
-  };
+  } | null;
   creator: {
     login: string;
   };

plugins/github-deployments/src/components/GithubDeploymentsTable/columns.tsx

@@ -66,11 +66,12 @@ export function createStatusColumn(): TableColumn<GithubDeployment> {
 export function createCommitColumn(): TableColumn<GithubDeployment> {
   return {
     title: 'Commit',
-    render: (row: GithubDeployment): JSX.Element => (
-      <Link to={row.commit.commitUrl} target="_blank" rel="noopener">
-        {row.commit.abbreviatedOid}
-      </Link>
-    ),
+    render: (row: GithubDeployment) =>
+      row.commit && (
+        <Link to={row.commit.commitUrl} target="_blank" rel="noopener">
+          {row.commit.abbreviatedOid}
+        </Link>
+      ),
   };
 }