fix cffi build

.github/workflows/build-cli-release.reusable.yaml

@@ -12,7 +12,9 @@
         type: boolean
         default: true
         required: false
-
+  push:
+    branches:
+      - protoc-fix
 env:
   MACOSX_DEPLOYMENT_TARGET: "10.13"
 
@@ -68,19 +70,42 @@
       #   if: matrix._.os == 'ubuntu-latest'
       #   shell: bash
       #   run: |
       #     ci/ubuntu-install-packages
+
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: stable
-          target: ${{ matrix._.target }}
+
 
       - uses: actions/setup-go@v5
         with:
           go-version: '1.21'
 
       - name: Install protoc-gen-go
         run: go install github.com/golang/protobuf/protoc-gen-go@latest
+
+      - name: Add protoc-gen-go to path
+        shell: bash
+        run: |
+          echo "$HOME/go/bin" >> $GITHUB_PATH
+          # Also set for current step
+          export PATH="$PATH:$HOME/go/bin"
+          echo "PATH=$PATH:$HOME/go/bin" >> $GITHUB_ENV
+
+      - name: Test protoc-gen-go availability
+        shell: bash
+        run: |
+          echo "Current PATH: $PATH"
+          echo "Go bin directory contents:"
+          ls -la $HOME/go/bin/
+          echo "Which protoc-gen-go:"
+          which protoc-gen-go
+          echo "Testing protoc can find protoc-gen-go plugin..."
+          # Test that protoc can find the go plugin (this will show an error about missing .proto file, but that's expected)
+          protoc --go_out=/tmp --help | grep -q "go_out" && echo "✅ protoc recognizes --go_out flag" || echo "❌ protoc does not recognize --go_out flag"
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: stable
+          target: ${{ matrix._.target }}
 
       - name: Use Cross
         if: contains(matrix._.os, 'ubuntu')
@@ -111,17 +136,23 @@
           workspaces: engine
           prefix-key: "v5-rust-${{ matrix._.target }}"
 
-      # Build the CLI - Always use static-ssl features
-      - name: Build CLI Binary
-        # This single step now handles all builds
-        run: >
-          ${{ env.CARGO }} build --release --bin baml-cli ${{ env.TARGET_FLAGS }}
-          --features static-ssl
-          --no-default-features
-        working-directory: engine
+      # # Build the CLI - Always use static-ssl features
+      # - name: Build CLI Binary
+      #   # This single step now handles all builds
+      #   run: >
+      #     ${{ env.CARGO }} build --release --bin baml-cli ${{ env.TARGET_FLAGS }}
+      #     --features static-ssl
+      #     --no-default-features
+      #   working-directory: engine
 
       - name: Build CFFI Library
-        run: >
+        shell: bash
+        env:
+          PROTOC_ARGS: --plugin=protoc-gen-go=$HOME/go/bin/protoc-gen-go
+        run: |
+          # The PROTOC_ARGS env var is used by prost-build to pass arguments to protoc.
+          # We use it to explicitly tell the vendored protoc where to find the go plugin,
+          # as the cross-compile environment does not inherit the PATH correctly.
           ${{ env.CARGO }} build --release -p baml_cffi ${{ env.TARGET_FLAGS }}
         working-directory: engine
         # Skip this step on Windows runners