Auto-build docker when docker file changes.

2026-06-20 09:16:27 +02:00
parent 7cb92a4091
commit 6b52526e44
4 changed files with 126 additions and 19 deletions
@@ -0,0 +1,45 @@
+name: '🐳 Builder Image'
+
+# Reusable workflow: builds (and optionally pushes) the kpnpp-builder image.
+# It is called by ci.yaml only when Dockerfile.builder or docs/requirements.txt
+# change. It runs on the host runner (NOT inside the builder container) because
+# it needs the Docker CLI/daemon.
+on:
+  workflow_call:
+    inputs:
+      push:
+        description: 'Push the built image to the registry'
+        type: boolean
+        default: true
+  workflow_dispatch:
+    inputs:
+      push:
+        description: 'Push the built image to the registry'
+        type: boolean
+        default: true
+
+jobs:
+  build:
+    runs-on: linux/amd64
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # No docker login step: the host runner was authenticated to
+      # gitea.tourolle.paris with `docker login` during setup, so its cached
+      # credentials in ~/.docker/config.json cover the push below.
+      - name: Build builder image
+        # Context is the repo root because Dockerfile.builder COPYs
+        # docs/requirements.txt during the build.
+        run: |
+          docker build \
+            -f Dockerfile.builder \
+            -t gitea.tourolle.paris/dtourolle/kpnpp-builder:latest \
+            -t gitea.tourolle.paris/dtourolle/kpnpp-builder:${{ github.sha }} \
+            .
+
+      - name: Push builder image
+        if: ${{ inputs.push }}
+        run: |
+          docker push gitea.tourolle.paris/dtourolle/kpnpp-builder:latest
+          docker push gitea.tourolle.paris/dtourolle/kpnpp-builder:${{ github.sha }}