GitHub action to push browsermt/main branch to mozilla/bergamot-translator every hour (#160)

* Create push-browsermt-main-to-mozilla-main.yml

* Update .github/workflows/push-browsermt-main-to-mozilla-main.yml

Co-authored-by: Graeme <graemenail@gmail.com>

* Tweaks

* Fix yaml syntax

* Parametrized the workflow based on @jerinphilip's example

Co-authored-by: Graeme <graemenail@gmail.com>

.github/workflows/push-browsermt-main-to-mozilla-main.yml

@@ -0,0 +1,27 @@
+name: Push browsermt/main branch to mozilla/bergamot-translator
+
+on:
+  schedule:
+  # Run every hour
+  - cron: "0 * * * *"
+
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Mirror a branch from a remote repo into this one
+    env:
+      source_repository: 'browsermt/bergamot-translator'
+      this_repository: 'mozilla/bergamot-translator'
+      branch: 'main'
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Mirror a branch from a remote repo into this one
+        if: github.repository == '${{ env.this_repository }}'
+        run: |
+          git clone -b ${{ env.branch }} https://github.com/${{ env.source_repository }}.git source
+          cd source
+          git remote add mirror https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ env.this_repository }}.git
+          git push mirror ${{ env.branch }}