Split up docker image building for re-use

.github/workflows/docker-image.yml

@@ -0,0 +1,66 @@
+name: Docker Image
+
+on:
+  workflow_call:
+    inputs:
+      tags:
+        description: "List of image tags (newline separated) for the resulting docker image"
+        required: true
+        type: string
+      push:
+        description: "If true, the image will be pushed to the registry"
+        required: false
+        default: false
+        type: boolean
+      platforms:
+        description: "Comma separated list of platforms to build the image for"
+        required: false
+        default: "linux/amd64,linux/arm64"
+        type: string
+      context:
+        description: "Context directory for the docker build"
+        required: false
+        default: "."
+        type: string
+      build-args:
+        description: "List of build arguments (newline separated) to be inserted in the docker build"
+        required: false
+        default: ""
+        type: string
+      file:
+        description: "Name of the dockerfile to build"
+        required: false
+        default: "Dockerfile"
+        type: string
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@2b51285047da1547ffb1b2203d8be4c0af6b1f20 # v3.2.0
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build${{ inputs.push && ' and push' || ''}}
+        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
+        with:
+          context: "${{ inputs.context }}"
+          file: "${{ inputs.file }}"
+          platforms: "${{ inputs.platforms }}"
+          no-cache: true
+          pull: true
+          build-args: "${{ inputs.build-args }}"
+          push: ${{ inputs.push }}
+          tags: "${{ inputs.tags }}"

.github/workflows/docker.yml

@@ -1,11 +1,10 @@
 name: Docker
 
 on:
-  workflow_call: {}
+  workflow_call:
 
 jobs:
-  build:
-    runs-on: ubuntu-latest
+  docker:
     strategy:
       matrix:
         include:
@@ -18,34 +17,13 @@ jobs:
           - version: bullseye
             latest: false
             alt: oldstable
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@2b51285047da1547ffb1b2203d8be4c0af6b1f20 # v3.2.0
-
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20 # v3.1.0
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Build and push
-        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
-        with:
-          context: .
-          platforms: linux/amd64,linux/arm64
-          no-cache: true
-          pull: true
-          build-args: |
+    uses: "./.github/workflows/docker-image.yml"
+    secrets: inherit
+    with:
+        push: ${{ github.ref == 'refs/heads/main' }}
+        build-args: |
             DEBIAN_VERSION=${{matrix.version}}
-          push: ${{ github.ref == 'refs/heads/main' }}
-          tags: |
+        tags: |
             ghcr.io/tweedegolf/debian:${{matrix.version}}
             ghcr.io/tweedegolf/debian:${{matrix.alt}}
             ${{ matrix.latest && 'ghcr.io/tweedegolf/debian:latest' || '' }}