add upstream fetcher

.github/workflows/upstream-fetcher.yml

@@ -0,0 +1,64 @@
+name: Sync Upstream
+
+env:
+  # Required, URL to upstream (fork base)
+  UPSTREAM_URL: "https://github.com/prebid/Prebid.js.git"
+  # Required, token to authenticate bot, could use ${{ secrets.GITHUB_TOKEN }} 
+  # Over here, we use a PAT instead to authenticate workflow file changes.
+  WORKFLOW_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  # Optional, defaults to main
+  UPSTREAM_BRANCH: "master"
+  # Optional, defaults to UPSTREAM_BRANCH
+  DOWNSTREAM_BRANCH: "master"
+  # Optional fetch arguments
+  FETCH_ARGS: ""
+  # Optional merge arguments
+  MERGE_ARGS: ""
+  # Optional push arguments
+  PUSH_ARGS: ""
+  # Optional toggle to spawn time logs (keeps action active) 
+  SPAWN_LOGS: "false" # "true" or "false"
+
+# This runs every day on 1801 UTC
+on:
+  push:
+    branches:
+      - DO_NOT_MERGE_aja_staging
+  schedule:
+    - cron: '1 18 * * *'
+  # Allows manual workflow run (must in default branch to work)
+  workflow_dispatch:
+
+jobs:
+  fetch-upstream:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Sync master
+        uses: dabreadman/sync-upstream-repo@v1.3.0
+        with:
+          upstream_repo: ${{ env.UPSTREAM_URL }}
+          upstream_branch: ${{ env.UPSTREAM_BRANCH }}
+          downstream_branch: ${{ env.DOWNSTREAM_BRANCH }}
+          token: ${{ env.WORKFLOW_TOKEN }}
+          fetch_args: ${{ env.FETCH_ARGS }}
+          merge_args: ${{ env.MERGE_ARGS }}
+          push_args: ${{ env.PUSH_ARGS }}
+          spawn_logs: ${{ env.SPAWN_LOGS }}
+
+      - name: Rebase DO_NOT_MERGE_aja_staging
+        run: |
+          git clone https://github.com/ajainc/Prebid.js.git work
+          cd work
+          git config user.name ajarobot
+          git config user.email ajarobot@users.noreply.github.com
+          git config --local user.password ${{ secrets.GITHUB_TOKEN }}
+          git remote set-url origin "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/ajainc/Prebid.js.git"
+          git remote add upstream https://github.com/prebid/Prebid.js.git
+          git fetch upstream
+          git remote -v
+          git switch DO_NOT_MERGE_aja_staging
+          git push origin
+          git rebase origin/master
+          git push -f origin DO_NOT_MERGE_aja_staging
+          cd ..
+          rm -rf work