Prepare for automated triggering, and use the upstream gh-pages branch

Signed-off-by: Andrew Symington <simmers@intrinsic.ai>

Author: asymingt

.github/workflows/build-and-deploy-rcr-ui.yml

@@ -14,7 +14,16 @@
 
 name: build-and-deploy-rcr-ui
 run-name: ${{ github.actor }} builds and deploys github pages
-on: [push]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  repository_dispatch:
+    types: [on-rcr-trigger]
+
 permissions:
   contents: write
 jobs:
@@ -34,6 +43,10 @@ jobs:
       with:
         submodules: true
 
+    - name: Switch to latest gh-pages branch of the RCR
+      run: |
+        git submodule foreach git checkout origin/gh-pages 
+  
     - name: Setup Bazel
       uses: bazel-contrib/setup-bazel@0.15.0
       with:

data/ros-central-registry

@@ -11,7 +11,6 @@ export const MODULES_ROOT_DIR = path.join(
   process.cwd(),
   'data',
   'ros-central-registry',
-  'docs',
   'modules'
 )