get only Relays.dat

Author: jgstew

.github/workflows/ParseRelaysDotDat.yaml

@@ -18,14 +18,15 @@ jobs:
         with:
           fetch-depth: ${{ github.event_name == 'pull_request' && 2 || 0 }}
 
+      # https://stackoverflow.com/a/74268200/861745
       - name: Get changed files
         id: changed-files
         shell: bash
         run: |
           if ${{ github.event_name == 'pull_request' }}; then
-            echo "changed_files=$(git diff --name-only -r HEAD^1 HEAD | xargs)" >> $GITHUB_OUTPUT
+            echo "changed_files=$(git diff --name-only -r HEAD^1 HEAD | grep 'Relays.dat$' | xargs)" >> $GITHUB_OUTPUT
           else
-            echo "changed_files=$(git diff --name-only ${{ github.event.before }} ${{ github.event.after }} | xargs)" >> $GITHUB_OUTPUT
+            echo "changed_files=$(git diff --name-only ${{ github.event.before }} ${{ github.event.after }} | grep 'Relays.dat$' | xargs)" >> $GITHUB_OUTPUT
           fi
 
       - name: List changed files