From 3af093000ce60e7522c5a9e4cf76991418a4f51a Mon Sep 17 00:00:00 2001
From: vbaskov-ledger <vitalii.baskov-ext@ledger.fr>
Date: Thu, 5 Dec 2024 11:54:33 +0200
Subject: [PATCH] INFRAPRJ-7379: Add arm64 host builder. Part2.

---
 .github/workflows/speculos-builder.yml | 70 ++++++++++++++++++++++----
 1 file changed, 61 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/speculos-builder.yml b/.github/workflows/speculos-builder.yml
index b373adbc..a99a8d22 100644
--- a/.github/workflows/speculos-builder.yml
+++ b/.github/workflows/speculos-builder.yml
@@ -17,22 +17,27 @@ on:
       - .github/workflows/speculos-builder.yml
       - build.Dockerfile
 
-
 jobs:
   build:
     name: Build and push speculos-builder image
     strategy:
       matrix:
         include:
-          - label: ubuntu-latest
-            platform: linux/amd64
-          - label: speculos-builder-2c-arm64-ubuntu_2404
-            platform: linux/arm64
-    runs-on: ${{ matrix.label }}
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            runner: speculos-builder-2c-arm64-ubuntu_2404
+
+    runs-on: ${{ matrix.runner }}
     permissions:
       packages: write
 
     steps:
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
     - name: Clone
       uses: actions/checkout@v4
 
@@ -49,10 +54,57 @@ jobs:
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
-    - name: Build and push speculos-builder to GitHub Packages
+    - name: Build and push speculos-builder to GitHub Packages by digest
       uses: docker/build-push-action@v6
+      id: build
       with:
-        platforms: ${{ matrix.platform }}
         push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
         file: build.Dockerfile
-        tags: ghcr.io/ledgerhq/speculos-builder:latest
+        platforms: ${{ matrix.platform }}
+        outputs: type=image,name=ghcr.io/ledgerhq/speculos-builder,push-by-digest=true,name-canonical=true,push=true
+
+    - name: Export digest
+      run: |
+        mkdir -p /tmp/digests
+        digest="${{ steps.build.outputs.digest }}"
+        touch "/tmp/digests/${digest#sha256:}"
+
+    - name: Upload digest
+      uses: actions/upload-artifact@v4
+      with:
+        name: digests-${{ env.PLATFORM_PAIR }}
+        path: /tmp/digests/*
+        if-no-files-found: error
+        retention-days: 1
+
+  merge:
+    if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create --tag ghcr.io/ledgerhq/speculos-builder:latest  $(printf 'ghcr.io/ledgerhq/speculos-builder@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ghcr.io/ledgerhq/speculos-builder:latest