add weekly-ci action

Signed-off-by: Evgeny Fedin <efedin@redhat.com>

.github/workflows/weekly_ci.yml

@@ -0,0 +1,67 @@
+# yamllint disable rule:line-length
+name: Weekly CI trigger
+on:  # yamllint disable-line rule:truthy
+  workflow_dispatch:
+  schedule:
+    - cron: '0 13 * * 6'
+env:
+  BRANCH_NAME: "weekly-ci"
+  COMMIT_MESSAGE: "Weekly CI check"
+  COMMENT: "[citest]"
+jobs:
+  weekly_ci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete the previous branch if exists
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const response = await github.rest.git.listMatchingRefs({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              branch: "heads/${{ env.BRANCH_NAME }}",
+            });
+            for (ref in response.data){
+              if (response.data[ref].ref == "refs/heads/${{ env.BRANCH_NAME }}"){
+                console.log("deleting branch");
+                console.log(response.data[ref]);
+                await github.rest.git.deleteRef({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  ref: "heads/${{ env.BRANCH_NAME }}",
+                });
+              }
+            }
+
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Create and push empty commit
+        run: |
+          set -euxo pipefail
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git checkout -b weekly-ci
+          git commit --allow-empty -m "${{ env.COMMIT_MESSAGE }}"
+          git push --set-upstream origin ${{ env.BRANCH_NAME }}
+
+      - name: Create and comment pull request
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GH_PUSH_TOKEN }}
+          script: |
+            const response = await github.rest.pulls.create({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              title: "${{ env.COMMIT_MESSAGE }}",
+              head: "${{ env.BRANCH_NAME }}",
+              base: context.ref
+            });
+            github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: response.data.number,
+              body: "${{ env.COMMENT }}",
+            });