feat: Add platform arg to force building a specific architecture

.github/workflows/build-pr.yml

@@ -258,6 +258,58 @@ jobs:
           grep -q 'ARG IMAGE_REGISTRY=ghcr.io/blue-build' Containerfile || exit 1
           bluebuild build --retry-push -B docker -I docker -S sigstore --push -vv recipes/recipe.yml recipes/recipe-39.yml
 
+  arm64-build:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    needs:
+      - build
+    if: needs.build.outputs.push == 'true'
+
+    steps:
+      - name: Maximize build space
+        uses: ublue-os/remove-unwanted-software@v6
+
+      - uses: sigstore/cosign-installer@v3.3.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          install: true
+
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{github.event.pull_request.head.ref}}
+          repository: ${{github.event.pull_request.head.repo.full_name}}
+
+      - name: Install bluebuild
+        run: |
+          cargo install --path . --debug --all-features
+
+      - name: Expose GitHub Runtime
+        uses: crazy-max/ghaction-github-runtime@v3
+
+      - name: Run Build
+        env:
+          GH_TOKEN: ${{ github.token }}
+          GH_PR_EVENT_NUMBER: ${{ github.event.number }}
+          COSIGN_PRIVATE_KEY: ${{ secrets.TEST_SIGNING_SECRET }}
+          BB_BUILDKIT_CACHE_GHA: true
+        run: |
+          cd integration-tests/test-repo
+          bluebuild build \
+            --retry-push \
+            --platform linux/arm64 \
+            --push \
+            -vv \
+            recipes/recipe-arm64.yml
+
   docker-build-external-login:
     timeout-minutes: 60
     runs-on: ubuntu-latest

.github/workflows/build.yml

@@ -256,6 +256,58 @@ jobs:
           grep -q 'ARG IMAGE_REGISTRY=ghcr.io/blue-build' Containerfile || exit 1
           bluebuild build --retry-push -B docker -I docker -S sigstore --push -vv recipes/recipe.yml recipes/recipe-39.yml
 
+  arm64-build:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    if: github.repository == 'blue-build/cli'
+    needs:
+      - build
+
+    steps:
+      - name: Maximize build space
+        uses: ublue-os/remove-unwanted-software@v6
+
+      - uses: sigstore/cosign-installer@v3.3.0
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          install: true
+
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{github.event.pull_request.head.ref}}
+          repository: ${{github.event.pull_request.head.repo.full_name}}
+
+      - name: Install bluebuild
+        run: |
+          cargo install --path . --debug --all-features
+
+      - name: Expose GitHub Runtime
+        uses: crazy-max/ghaction-github-runtime@v3
+
+      - name: Run Build
+        env:
+          GH_TOKEN: ${{ github.token }}
+          GH_PR_EVENT_NUMBER: ${{ github.event.number }}
+          COSIGN_PRIVATE_KEY: ${{ secrets.TEST_SIGNING_SECRET }}
+          BB_BUILDKIT_CACHE_GHA: true
+        run: |
+          cd integration-tests/test-repo
+          bluebuild build \
+            --retry-push \
+            --platform linux/arm64 \
+            --push \
+            -vv \
+            recipes/recipe-arm64.yml
+
   docker-build-external-login:
     timeout-minutes: 60
     runs-on: ubuntu-latest