Add path filter to GH action for documentation publishing

Author: ddsharpe

.github/workflows/publish-github-pages.yml

@@ -1,4 +1,4 @@
-# Copyright (c) 2021, Oracle and/or its affiliates.
+# Copyright (c) 2021, 2023, Oracle and/or its affiliates.
 # Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.
 #
 # Description
@@ -8,7 +8,10 @@ name: "PublishGitHubPages"
 
 on:
   push:
-    branches: [ main ]
+    branches:
+      - 'main'
+    paths:
+      - 'documentation/**'
   schedule:
     - cron: '15 3 * * 1'
 
@@ -23,32 +26,19 @@ jobs:
 
     steps:
       - name: Checkout main
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v3
         with:
           ref: main
-          fetch-depth: 32
           path: main
 
       - name: Checkout gh-pages
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v3
         with:
           ref: gh-pages
           path: gh-pages
           token: ${{ secrets.PUBLISH_SECRET }}
 
-      - name: Verify changes to documentation present
-        id: change-check
-        run: |
-          cd $GITHUB_WORKSPACE/main
-          X=`git diff HEAD~1 --name-only | { grep "^documentation" || test $? = 1; } | wc -l`
-          if [ $X == "0" ]; then
-            echo 'No changes to the documenation'
-          else
-            echo '::set-output name=DOCUMENTATION_CHANGED::true'
-          fi
-
       - name: Build and publish site
-        if: ${{ steps.change-check.outputs.DOCUMENTATION_CHANGED == 'true' }}
         run: |
           curl -fL -o hugo.tar.gz "https://github.com/gohugoio/hugo/releases/download/v0.82.0/hugo_0.82.0_Linux-64bit.tar.gz"
           tar -xf hugo.tar.gz