ci: split Linux build job into separate AMD64 and ARM64 workflows

Author: csjones

.github/workflows/release.yml

@@ -30,8 +30,8 @@ jobs:
           path: .build/apple/Products/Release/subtree
           retention-days: 5
 
-  linux:
-    name: Build Linux binaries
+  linux-amd64:
+    name: Build Linux AMD64 binary
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -40,64 +40,63 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Install cross-binutils for aarch64
-        run: sudo apt install -y binutils-aarch64-linux-gnu
-        
-      - name: Build and export binaries
+      - name: Build AMD64 binary
         uses: docker/build-push-action@v5
         with:
           context: .
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           target: output
           outputs: type=local,dest=artifacts
 
-      - name: Test and organize binaries
+      - name: Strip and prepare binary
         run: |
-          # Test that binaries were built successfully
-          echo "✅ Linux AMD64 binary built: $(file artifacts/linux_amd64/subtree)"
-          echo "✅ Linux ARM64 binary built: $(file artifacts/linux_arm64/subtree)"
-          
-          # Verify architectures match expected platforms
-          if ! file artifacts/linux_amd64/subtree | grep -q "x86.64\|x86_64"; then
-            echo "❌ ERROR: AMD64 binary has wrong architecture!"
-            echo "Expected: x86_64, Got: $(file artifacts/linux_amd64/subtree)"
-            exit 1
-          fi
-          
-          if ! file artifacts/linux_arm64/subtree | grep -q "aarch64\|ARM aarch64"; then
-            echo "❌ ERROR: ARM64 binary has wrong architecture!"  
-            echo "Expected: aarch64, Got: $(file artifacts/linux_arm64/subtree)"
-            exit 1
-          fi
-          
-          echo "✅ Architecture verification passed"
-          
-          # Strip and organize AMD64 binary
-          strip artifacts/linux_amd64/subtree
-          mv artifacts/linux_amd64/subtree "${HOME}/subtree_linux"
-          
-          # Strip and organize ARM64 binary  
-          aarch64-linux-gnu-strip artifacts/linux_arm64/subtree
-          mv artifacts/linux_arm64/subtree "${HOME}/subtree_linux_aarch64"
+          strip artifacts/subtree
+          mv artifacts/subtree subtree_linux
           
       - name: Upload AMD64 Artifact
         uses: actions/upload-artifact@v4
         with:
           name: subtree_linux
-          path: ~/subtree_linux
+          path: subtree_linux
           retention-days: 5
+
+  linux-arm64:
+    name: Build Linux ARM64 binary
+    runs-on: ubuntu-24.04-arm64
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        
+      - name: Install ARM64 cross-tools
+        run: sudo apt install -y binutils-aarch64-linux-gnu
+        
+      - name: Build ARM64 binary
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/arm64
+          target: output
+          outputs: type=local,dest=artifacts
+          
+      - name: Strip and prepare binary
+        run: |
+          aarch64-linux-gnu-strip artifacts/subtree
+          mv artifacts/subtree subtree_linux_aarch64
           
       - name: Upload ARM64 Artifact
         uses: actions/upload-artifact@v4
         with:
           name: subtree_linux_aarch64
-          path: ~/subtree_linux_aarch64
+          path: subtree_linux_aarch64
           retention-days: 5
 
   upload:
     name: Upload release artifacts
     runs-on: ubuntu-latest
-    needs: [macos, linux]
+    needs: [macos, linux-amd64, linux-arm64]
     steps:
       - name: Checkout the repository
         uses: actions/checkout@v4