Add VegaFusion server (#76)

* Generate tonic service definitions behind feature flag
* Don't panic on task graph index out of bounds error
* Add helper to deserialize TaskGraphValuesResponse
* Add initial vegafusion-server application crate
* Fix error condition where request is cancelled in progress
* Initial support for gRPC connection from Python VegaFusionRuntime
* Comment logging messages
* catch_unwind in get_node_value just in case
* Add vegafusion-server argument parsing
* Replace websocket with gRPC-Web
* Pass MsgReceiver as second argument to send_msg_fn
* Add chart-editor app using gRPC-Web to connect to vegafusion server
* chart editor example updates
* Remove old websocket chart editor example
* Remove optional dependencies from vegafusion-wasm
* Remove hello world gRPC examples
* Launch vegafusion-server in the background during vegafusion-server test
* Add initial build-vegafusion-server CI build

.github/workflows/build_test.yml

@@ -64,6 +64,51 @@ jobs:
           command: test
           args: --all-features
 
+  build-vegafusion-server:
+    strategy:
+      matrix:
+        options: [
+            [ubuntu-20.04,  linux-64],
+            [windows-2019,  win-64],
+            [macos-10.15,   osx-64],
+        ]
+    runs-on: ${{ matrix.options[0] }}
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v2
+      - name: Install latest stable Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - name: Cache rust dependencies
+        uses: Swatinem/rust-cache@v1
+        with:
+          cache-on-failure: True
+      - name: Build vegafusion-server
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: -p vegafusion-server --release
+      - name: zip executable (Windows)
+        uses: papeloto/action-zip@v1
+        if: runner.os == 'Windows'
+        with:
+          files: target/release/vegafusion-server.exe
+          dest: vegafusion-server-${{ matrix.options[1] }}.zip
+      - name: zip executable (Mac or Linux)
+        uses: papeloto/action-zip@v1
+        if: runner.os != 'Windows'
+        with:
+          files: target/release/vegafusion-server
+          dest: vegafusion-server-${{ matrix.options[1] }}.zip
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: vegafusion-server
+          path: |
+            vegafusion-server-*
+
   build-vegafusion-python-embed:
     runs-on: ${{ matrix.os }}
     strategy:

.gitignore

@@ -25,3 +25,6 @@ _vegafusion_data
 /python/vegafusion-jupyter/examples/omnisci_downloads/
 /python/vegafusion/dist/
 /python/vegafusion/vegafusion.egg-info/
+/python/vegafusion/build/
+/vegafusion-wasm/examples/chart_editor/dist/
+/vegafusion-wasm/examples/chart_editor/node_modules/