feat(spark): datafusion-spark-bridge Rust SDK (2/6)

.cargo/config.toml

@@ -0,0 +1,21 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# Keep Cargo's workspace output out of `target/` so `mvn clean` (which deletes
+# the root `target/`) does not nuke the Rust build cache.
+[build]
+target-dir = "rust-target"

.github/workflows/build.yml

@@ -83,8 +83,8 @@ jobs:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
-            native/target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('native/Cargo.lock') }}
+            rust-target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
           restore-keys: ${{ runner.os }}-cargo-
 
       - name: Build native and run tests

.github/workflows/lint.yml

@@ -54,7 +54,7 @@ jobs:
         run: ./mvnw -q spotless:check
 
       - name: Check Rust formatting
-        run: cd native && cargo fmt --all -- --check
+        run: cargo fmt --all -- --check
 
   clippy:
     name: Clippy
@@ -81,9 +81,9 @@ jobs:
           path: |
             ~/.cargo/registry
             ~/.cargo/git
-            native/target
-          key: ${{ runner.os }}-clippy-${{ hashFiles('native/Cargo.lock') }}
+            rust-target
+          key: ${{ runner.os }}-clippy-${{ hashFiles('Cargo.lock') }}
           restore-keys: ${{ runner.os }}-clippy-
 
       - name: Run clippy
-        run: cd native && cargo clippy --all-targets -- -D warnings
+        run: cargo clippy --workspace --all-targets -- -D warnings

.gitignore

@@ -1,4 +1,5 @@
 target/
+rust-target/
 *.class
 .idea/
 .vscode/