Auto PR with Auto merge for syncing master-v2 (#1604)

* feat: auto pr for master-v2

* feat: auto merge pr's without conflicts

.github/workflows/auto-merge-pr.yml

@@ -0,0 +1,45 @@
+name: Auto Merge PR without conflicts
+
+on:
+  pull_request:
+    branches: [ master-v2 ]
+
+jobs:
+  auto-merge-pr:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Attach Label to PR
+        run: |
+          set -o xtrace
+
+          curl -X PATCH "https://api.github.com/repos/omgnetwork/elixir-omg/issues/${{ github.event.pull_request.number }}" \
+          -H "Accept: application/vnd.github.v3+json" \
+          -H "Authorization: token ${{ secrets.HOUSE_KEEPER_BOT_TOKEN }}" \
+          --data "{\"labels\": [\"sync master-v2\"]}"
+
+      - name: Merge PR
+        if: github.head_ref == 'master'
+        run: |
+          set -o xtrace
+
+          function check_merge() {
+          curl "https://api.github.com/repos/omgnetwork/elixir-omg/pulls/${{ github.event.pull_request.number }}" \
+          -H "Accept: application/vnd.github.v3+json" \
+          -H "Authorization: token ${{ secrets.HOUSE_KEEPER_BOT_TOKEN }}" |
+          jq -r '.mergeable'
+          }  
+
+          until [ "$(check_merge)" = true -o "$(check_merge)" = false ]; do
+            echo -n 'waiting...'
+            sleep 10
+          done
+
+          if [ "$(check_merge)" = true ]; then
+             curl -X PUT "https://api.github.com/repos/omgnetwork/elixir-omg/pulls/${{ github.event.pull_request.number }}/merge" \
+             -H "Accept: application/vnd.github.v3+json" \
+             -H "Authorization: token ${{ secrets.HOUSE_KEEPER_BOT_TOKEN }}" \
+             --data "{\"commit_title\": \"auto-merged ${{ github.event.pull_request.number }}\"}"
+          else
+             echo "PR unmerged"
+          fi

.github/workflows/auto-pr-for-branch-syncing.yml

@@ -0,0 +1,24 @@
+name: Auto PR for syncing master to master-v2
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  auto-pr-for-branch-syncing:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Create Pull Request
+        run: |
+          set -o xtrace
+
+          readonly FROM_BRANCH="master"
+          readonly TO_BRANCH="master-v2"
+          readonly TITLE="sync: auto syncing from ${FROM_BRANCH} to ${TO_BRANCH}"
+          readonly BODY="Time to sync \`${TO_BRANCH}\` with updates from \`${FROM_BRANCH}\`!"
+
+          curl -X POST "https://api.github.com/repos/omgnetwork/elixir-omg/pulls" \
+          -H "Accept: application/vnd.github.v3+json" \
+          -H "Authorization: token ${{ secrets.HOUSE_KEEPER_BOT_TOKEN }}" \
+          --data "{\"title\": \"${TITLE}\", \"head\": \"${FROM_BRANCH}\", \"base\": \"${TO_BRANCH}\", \"body\": \"${BODY}\"}"