Add GitHub CI file

.github/workflows/regression.yml

@@ -0,0 +1,46 @@
+name: Regression
+
+on:
+  workflow_dispatch:
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y curl
+        sudo apt install -y gcc-9 gcc-10 gcc-11 gcc-12
+
+    - name: Install CWhy
+      run: |
+        python3 -m pip install --upgrade pip
+        python3 -m pip install .
+
+    - name: Generate current prompts
+      run: python3 tests/regression.py --platform ubuntu --generate
+
+    - name: Commit
+      run: |
+        git diff | test # There are no changes to the prompts.
+        git config user.name github-actions
+        git config user.email [email protected]
+        git add tests/.regression
+        git switch -c bot/regression/ubuntu
+        git commit -m "[bot] Generate current state of CWhy prompts"
+        git push origin --delete bot/regression/ubuntu
+        git push origin bot/regression/ubuntu
+
+    - name: Create pull request
+      run: |
+        curl -L                                                                                                                                                                  \
+          -X POST                                                                                                                                                                \
+          -H "Accept: application/vnd.github+json"                                                                                                                               \
+          -H "Authorization: Bearer ${{secrets.GITHUB_TOKEN}}"                                                                                                                   \
+          -H "X-GitHub-Api-Version: 2022-11-28"                                                                                                                                  \
+          https://api.github.com/repos/plasma-umass/cwhy/pulls                                                                                                                   \
+          -d '{"title":"[bot] Generate current state of CWhy prompts","body":"Timestamp: ${{github.event.repository.updated_at}}","head":"bot/regression/ubuntu","base":"main"}'