feat: add coredns mysql image build and updater

.gitea/workflows/image.yaml

@@ -0,0 +1,66 @@
+name: Build and update CoreDNS MySQL
+
+on:
+  push:
+    branches: [main]
+  schedule:
+    - cron: '0 2 * * *'
+  workflow_dispatch:
+
+concurrency:
+  group: coredns-mysql
+  cancel-in-progress: false
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Check upstream versions
+        if: github.event_name != 'push'
+        run: python3 scripts/update.py
+      - name: Build and test
+        run: |
+          set -eu
+          . ./versions.env
+          docker build --pull --build-arg COREDNS_VERSION="$COREDNS_VERSION" --build-arg MYSQL_PLUGIN_REV="$MYSQL_PLUGIN_REV" -f dockerfile -t coredns-mysql:ci .
+          scripts/test-image.sh coredns-mysql:ci "$COREDNS_VERSION"
+      - name: Commit and push updated versions
+        if: github.event_name != 'push'
+        env:
+          GIT_HOST: ${{ vars.GIT_HOST }}
+          GIT_NAME: ${{ vars.GIT_NAME }}
+          GIT_EMAIL: ${{ vars.GIT_EMAIL }}
+          REGISTRY_USER: ${{ vars.REGISTRY_USER }}
+          GIT_TOKEN: ${{ secrets.GIT_TOKEN }}
+        run: |
+          set -eu
+          if git diff --quiet -- versions.env; then exit 0; fi
+          test -n "$GIT_HOST" && test -n "$GIT_NAME" && test -n "$GIT_EMAIL" && test -n "$REGISTRY_USER" && test -n "$GIT_TOKEN"
+          git config user.name "$GIT_NAME"
+          git config user.email "$GIT_EMAIL"
+          git add versions.env
+          git commit -m 'chore: update upstream versions'
+          askpass=$(mktemp)
+          trap 'rm -f "$askpass"' EXIT
+          printf '%s\n' '#!/bin/sh' 'case "$1" in *Username*) printf "%s\\n" "$REGISTRY_USER" ;; *) printf "%s\\n" "$GIT_TOKEN" ;; esac' > "$askpass"
+          chmod 700 "$askpass"
+          GIT_ASKPASS="$askpass" GIT_TERMINAL_PROMPT=0 git push "https://${GIT_HOST}/${GITHUB_REPOSITORY}.git" HEAD:refs/heads/main
+      - name: Publish image
+        env:
+          GIT_HOST: ${{ vars.GIT_HOST }}
+          REGISTRY_USER: ${{ vars.REGISTRY_USER }}
+          GIT_TOKEN: ${{ secrets.GIT_TOKEN }}
+        run: |
+          set -eu
+          test -n "$GIT_HOST" && test -n "$REGISTRY_USER" && test -n "$GIT_TOKEN"
+          . ./versions.env
+          image="${GIT_HOST}/docker/coredns-mysql"
+          printf '%s' "$GIT_TOKEN" | docker login "$GIT_HOST" --username "$REGISTRY_USER" --password-stdin
+          trap 'docker logout "$GIT_HOST" >/dev/null 2>&1 || true' EXIT
+          docker tag coredns-mysql:ci "${image}:${COREDNS_VERSION}"
+          docker tag coredns-mysql:ci "${image}:latest"
+          docker push "${image}:${COREDNS_VERSION}"
+          docker push "${image}:latest"