Prevent creation of stale branches in s3-sync cronjob (#323)

* make synchronization use one branch

* testing

* revert testing changes

.github/workflows/sync.yml

@@ -2,7 +2,10 @@ name: S3-synchronization-cronjob
 
 on:
   schedule:
-    - cron: '0 8 * * *' # Everyday at 8am
+    - cron: '0 8 * * *' # Run every 8am
+
+env:
+  SYNC_BRANCH_NAME: 's3-sync-branch-91rf9321'
 
 jobs:
   sync:
@@ -12,21 +15,21 @@ jobs:
         with:
           ref: master
           token: ${{ secrets.GH_TOKEN }}
-      - name: Generate random number
-        id: random
-        run: echo "::set-output name=value::$(echo $RANDOM)"
       - name: Get current date
         id: date
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
-      - name: Create branch
+      - name: Delete old sync branch if it exists
+        run: |
+          git push -d origin ${{ env.SYNC_BRANCH_NAME }} &>/dev/null || true
+      - name: Create sync branch
         uses: peterjgrainger/[email protected]
         env:
           GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
         with:
-          branch: sync-${{ steps.random.outputs.value }}
+          branch: ${{ env.SYNC_BRANCH_NAME }}
       - uses: actions/checkout@v4
         with:
-          ref: sync-${{ steps.random.outputs.value }}
+          ref: ${{ env.SYNC_BRANCH_NAME }}
           token: ${{ secrets.GH_TOKEN }}
       - name: create env file
         run: |
@@ -49,6 +52,7 @@ jobs:
           git push
       - name: create pull request
         run: |
-          gh pr create -B master -H sync-${{ steps.random.outputs.value }} --title 'Cronjob/Sync docs folder with s3' --body 'Created by Github action'
+          gh pr create -B master -H ${{ env.SYNC_BRANCH_NAME }} --title 'Cronjob/Sync docs folder with s3' --body 'Created by Github action'
         env:
           GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+