(maint) Prevent workflow from failing on no-op

.github/workflows/bump_synthetics_worker_version.yml

@@ -22,13 +22,18 @@ jobs:
       - run: pip install requests semver defusedxml
 
       - name: Find latest synthetic-worker version
+        id: write-synthetics-worker-version
         run: |
           python local/bin/py/version_getter.py
 
+      - name: echo new version
+        run: echo ${{ steps.write-synthetics-worker-version.outputs.new_version }}
+
       - uses: actions/checkout@v4
         with:
           persist-credentials: false
       - name: Write version
+        if: steps.write-synthetics-worker-version.outputs.new_version == 'true'
         run: |-
           git config user.name documentation-ci
           git config user.email [email protected]
@@ -38,6 +43,7 @@ jobs:
 
       - uses: actions/github-script@v7
         name: Propose change with latest versions
+        if: steps.write-synthetics-worker-version.outputs.new_version == 'true'
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           result-encoding: string

local/bin/py/version_getter.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 import re
+import os
 import json
 from io import StringIO
 import requests
@@ -60,11 +61,24 @@ def get_versions(keys):
 Currently only supports synthetics-windows-pl
 '''
 if __name__ == "__main__":
+    github_output = os.getenv('GITHUB_OUTPUT')
     PRODUCTS = ["synthetics-windows-pl"]
     data = get_data()
     keys = get_keys(data)
+    try:
+        current_versions = json.load(open('data/synthetics_worker_versions.json'))
+    except:
+        current_versions = {}
     final_versions = get_versions(keys)
-    print(final_versions)
 
-    with open('data/synthetics_worker_versions.json', 'w') as f:
-        f.write(json.dumps(final_versions, indent=4, sort_keys=True))
+    if current_versions != final_versions:
+        print("New version detected!")
+        print(final_versions)
+        with open('data/synthetics_worker_versions.json', 'w') as f:
+            f.write(json.dumps(final_versions, indent=4, sort_keys=True))
+        with open(github_output, 'a', encoding='utf-8') as f:
+            f.write('new_version=true')    
+    else:
+        with open(github_output, 'a', encoding='utf-8') as f:
+            print("No new version detected")
+            f.write('new_version=false')