ci: make ci.yml the single coordinator workflow

- Trigger ci on push and pull_request only
- Convert publish-image and stable-tag to reusable workflows (workflow_call)
- Add detect-release job for strict SemVer tag detection (vX.Y.Z)
- Run tests first, then publish image, then move stable tag
- Remove direct tag/push triggers from publish-image and stable-tag

https://chatgpt.com/share/e/699044d3-c1d8-8013-a40d-974d1fc69974

.github/workflows/ci.yml

@@ -1,11 +1,47 @@
 name: ci
 
 on:
-  pull_request:
+  pull_request: {}
-  push:
+  push: {}
-    branches:
+
-      - main
+permissions:
+  contents: write
+  packages: write
 
 jobs:
+  detect-release:
+    runs-on: ubuntu-latest
+    outputs:
+      is_semver_tag: ${{ steps.detect.outputs.is_semver_tag }}
+    steps:
+      - id: detect
+        shell: bash
+        run: |
+          set -euo pipefail
+          # Only true for tag refs like v1.2.3 (no suffix)
+          if [[ "${GITHUB_REF}" == refs/tags/* ]] && [[ "${GITHUB_REF_NAME}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo "is_semver_tag=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "is_semver_tag=false" >> "$GITHUB_OUTPUT"
+          fi
+
   tests:
     uses: ./.github/workflows/reusable-test.yml
+    with:
+      python-version: "3.12"
+      matomo-token-description: "ci-token"
+
+  publish-image:
+    if: needs.detect-release.outputs.is_semver_tag == 'true'
+    needs: [detect-release, tests]
+    uses: ./.github/workflows/publish-image.yml
+    permissions:
+      contents: read
+      packages: write
+
+  tag-stable:
+    if: needs.detect-release.outputs.is_semver_tag == 'true'
+    needs: [detect-release, tests, publish-image]
+    uses: ./.github/workflows/stable-tag.yml
+    permissions:
+      contents: write

.github/workflows/publish-image.yml

@@ -1,20 +1,10 @@
 name: publish-image
 
 on:
-  push:
+  workflow_call: {}
-    tags:
-      - "v*.*.*"
-
-  workflow_run:
-    workflows: ["Stable Tag"]   # MUST match stable-tag.yml -> name: Stable Tag
-    types: [completed]
 
 jobs:
   build-and-push:
-    if: |
-      (github.event_name == 'push') ||
-      (github.event_name == 'workflow_run' && github.event.workflow_run.conclusion == 'success')
-
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -24,9 +14,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          # push: checks out the tag ref
+          fetch-depth: 0
-          # workflow_run: checks out the exact commit that the Stable Tag workflow ran on
+          ref: ${{ github.ref }}   # bei tag-push ist das der Tag-Ref
-          ref: ${{ github.event_name == 'workflow_run' && github.event.workflow_run.head_sha || github.ref }}
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
@@ -47,14 +36,9 @@ jobs:
         run: |
           set -euo pipefail
           IMAGE="ghcr.io/${{ github.repository }}"
-
-          if [ "${{ github.event_name }}" = "push" ]; then
           RAW_TAG="${{ github.ref_name }}"   # e.g. v1.1.7
-            TAG="${RAW_TAG#v}"                 # -> 1.1.7 (only strips leading 'v')
+          TAG="${RAW_TAG#v}"                 # -> 1.1.7
           echo "tags=$IMAGE:$TAG,$IMAGE:latest" >> "$GITHUB_OUTPUT"
-          else
-            echo "tags=$IMAGE:stable" >> "$GITHUB_OUTPUT"
-          fi
 
       - name: Build and push
         uses: docker/build-push-action@v6

.github/workflows/stable-tag.yml

@@ -1,24 +1,14 @@
 name: Stable Tag
 
 on:
-  push:
+  workflow_call: {}
-    tags:
-      - "v*"
 
 permissions:
   contents: write
 
 jobs:
-  test:
-    uses: ./.github/workflows/reusable-test.yml
-    with:
-      python-version: "3.12"
-      matomo-token-description: "stable-ci-token"
-
   tag-stable:
     runs-on: ubuntu-latest
-    needs: test
-    if: startsWith(github.ref, 'refs/tags/v')
 
     steps:
       - name: Checkout (full history for tags)
@@ -37,6 +27,5 @@ jobs:
           git config user.email "github-actions[bot]@users.noreply.github.com"
 
           git fetch --tags --force
-
           git tag -fa stable -m "stable -> ${GITHUB_REF_NAME} (${GITHUB_SHA})" "${GITHUB_SHA}"
           git push --force origin stable