ci: add gha

Signed-off-by: Vitor Bandeira <[email protected]>

.github/workflows/sync-from-upstream.yml

@@ -0,0 +1,46 @@
+name: Automatically sync branch from upstream.
+
+on:
+  schedule:
+  - cron: "*/5 * * * *"
+
+  workflow_dispatch:
+    inputs:
+      force:
+        description: Use GitHub --force push.
+        default:
+
+  repository_dispatch:
+
+
+jobs:
+  Sync-Branch-From-Upstream:
+    name: Automatic sync 'master' from The-OpenROAD-Project/OpenSTA
+    runs-on: ${{ vars.USE_SELF_HOSTED == 'true' && 'self-hosted' || 'ubuntu-latest' }}
+
+    # Only allow one action to run at a time.
+    concurrency: sync-branch-from-upstream
+
+    # Action needs no permissions, as push is granted via adding a deploy key
+    # with write access to the $DEPLOY_KEY secret.
+    permissions:
+      contents: read
+
+    # Don't run on the upstream repository and only run on the right branch.
+    if: ${{ (github.repository != 'The-OpenROAD-Project/OpenSTA') && endsWith(github.ref, '/master') }}
+
+    steps:
+
+    - uses: The-OpenROAD-Project/actions/upstream_sync@main
+      env:
+        HAS_DEPLOY_KEY: ${{ !!(secrets.DEPLOY_KEY) }}
+      if: ${{ env.HAS_DEPLOY_KEY == 'true' }}
+      with:
+        upstreamRepo: The-OpenROAD-Project/OpenSTA
+        upstreamBranch: master
+        # To always overwrite master branch, set UPSTREAM_SYNC to the exact
+        # string 'always overwrite master branch'.
+        # You can also manually trigger a workflow dispatch with the force
+        # value equal to 'true'.
+        force: ${{ github.event.inputs.force || (secrets.UPSTREAM_SYNC == 'always overwrite master branch') }}
+        deployKey: ${{ secrets.DEPLOY_KEY }}