ci: update workflows

Author: sjinks

.github/workflows/build-push.yml

@@ -1,4 +1,4 @@
-name: Build and Push Base Image
+name: Build and Push Images
 
 on:
   push:

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Build Base Image
+name: Build images
 
 on:
   pull_request:
@@ -24,6 +24,19 @@ jobs:
         id: set-matrix
         run: echo images="$(jq '."x-build"' base-images/src/*/.devcontainer.json | jq --slurp -c .)" >> "${GITHUB_OUTPUT}"
 
+  prepare-others:
+    name: Prepare list of other images to build
+    runs-on: ubuntu-latest
+    outputs:
+      images: ${{ steps.set-matrix.outputs.images }}
+    steps:
+      - name: Check out the source code
+        uses: actions/[email protected]
+
+      - name: Set matrix
+        id: set-matrix
+        run: echo images="$(jq '."x-build"' images/src/*/.devcontainer.json | jq --slurp -c .)" >> "${GITHUB_OUTPUT}"
+
   build:
     needs: prepare
     strategy:
@@ -76,3 +89,59 @@ jobs:
             --cache-from type=gha \
             --cache-to type=gha,mode=max
         if: steps.changes.outputs.needs_build == 'true'
+
+  build-other-images:
+    needs:
+      - prepare-others
+    name: 'Build image ${{ matrix.image.name }}'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      fail-fast: false
+      matrix:
+        image: ${{ fromJson(needs.prepare-others.outputs.images) }}
+    steps:
+      - name: Check out the repo
+        uses: actions/[email protected]
+        with:
+          fetch-depth: 0
+
+      - name: Check changed files
+        id: changes
+        run: |
+          base="${{ github.event.pull_request.base.sha }}"
+          head="${{ github.event.pull_request.head.sha }}"
+          image="images/src/${{ matrix.image.image-name }}"
+          changes="$(git diff --name-only "${base}" "${head}" -- "${image}" | grep -Fv "${image}/README.md" || true)"
+          if [ -n "${changes}" ]; then
+            echo needs_build=true >> "${GITHUB_OUTPUT}"
+          else
+            echo needs_build=false >> "${GITHUB_OUTPUT}"
+          fi
+
+      - name: Expose GitHub Runtime
+        uses: Automattic/vip-actions/expose-github-runtime@e1faabf165941008de4c0c1381df153e49d8ad2c # v0.6.0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
+        if: steps.changes.outputs.needs_build == 'true'
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
+        if: steps.changes.outputs.needs_build == 'true'
+
+      - name: Install @devcontainers/cli
+        run: npm install -g @devcontainers/cli
+        if: ${{ steps.changes.outputs.needs_build == 'true' }}
+
+      - name: Build image
+        run: |
+          devcontainer build \
+            --workspace-folder images/src/${{ matrix.image.image-name }} \
+            --platform linux/amd64,linux/arm64 \
+            --output type=image \
+            --cache-from type=gha \
+            --cache-to type=gha,mode=max
+        if: ${{ steps.changes.outputs.needs_build == 'true' }}