Auto release charm to the latest/edge channel on new commits to main

.github/workflows/ci.yaml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: woke
         uses: get-woke/woke-action@v0
         with:
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: python3 -m pip install tox
       - name: Run linters
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: python3 -m pip install tox
       - name: Run static analysis
@@ -57,7 +57,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install dependencies
         run: python3 -m pip install tox
       - name: Run tests
@@ -78,7 +78,7 @@ jobs:
       - unit-test
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup operator environment
         uses: charmed-kubernetes/actions-operator@main
         with:

.github/workflows/release.yaml

@@ -0,0 +1,42 @@
+# Copyright 2024 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Release to latest/edge
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  ci-tests:
+    uses: ./.github/workflows/ci.yaml
+
+  release-to-charmhub:
+    name: Release to CharmHub
+    needs:
+      - ci-tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Select charmhub channel
+        uses: canonical/charming-actions/[email protected]
+        id: channel
+      - name: Upload charm to charmhub
+        uses: canonical/charming-actions/[email protected]
+        with:
+          credentials: "${{ secrets.CHARMCRAFT_AUTH }}"
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+          channel: "${{ steps.channel.outputs.name }}"