update react-native-windows on publish

Author: acoates-ms

.ado/updateRNW.js

@@ -0,0 +1,31 @@
+// @ts-check
+// This will trigger the evergreen build in the react-native-windows repo to update to the latest build of react-native
+
+const request = require('request');
+
+const url =
+  'https://api.github.com/repos/microsoft/react-native-windows/dispatches';
+request.post(
+  {
+    url: url,
+    json: true,
+    headers: {
+      Authorization: 'Basic ' + new Buffer(":" + process.env.GIT_TOKEN).toString("base64"),
+      'Content-Type': 'application/json',
+      'User-Agent': 'RNW-Evergreen Script',
+      Accept: 'application/vnd.github.everest-preview+json',
+    },
+    body: {
+      event_type: 'evergreen',
+    },
+  },
+  function(err, httpResponse, _body) {
+    if (err) {
+      throw new Error(err);
+    }
+
+    if (httpResponse.statusCode != 204) {
+      throw new Error('Failed to trigger build.');
+    }
+  },
+);

.github/workflows/publish.yml

@@ -63,3 +63,8 @@ jobs:
     - name: Publish NuGet
       run: |
        for %%i in (${{ runner.temp }}\final\*.nupkg) do nuget push %%i -Source ${{ secrets.NUGET_FEED }} -ApiKey msrnpublish
+
+    - name: Update react-native-windows
+      run: node .ado/updateRNW.js
+      env:
+        GIT_TOKEN: ${{ secrets.GIT_TOKEN }}