Use protox to compile protobufs in examples.

.github/dependabot.yml

@@ -23,6 +23,7 @@ updates:
     directories:
       - /
       - examples/envoy_filter_metadata
+      - examples/envoy_tcp_routing
       - examples/grpc_auth_random
       - examples/hello_world
       - examples/http_auth_random

.github/workflows/rust.yml

@@ -455,17 +455,6 @@ jobs:
         rustup toolchain install stable --component clippy --component rustfmt
         rustup target add wasm32-wasip1
 
-    - name: Install protobuf compiler
-      if: matrix.example == 'envoy_tcp_routing'
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y protobuf-compiler
-
-    - name: Clean generated files
-      if: matrix.example == 'envoy_tcp_routing'
-      run: |
-        rm -rf src/generated
-
     - name: Build (wasm32-wasip1)
       run: cargo build --release --target=wasm32-wasip1
 
@@ -541,17 +530,6 @@ jobs:
         rustup default nightly
         rustup target add wasm32-wasip1
 
-    - name: Install protobuf compiler
-      if: matrix.example == 'envoy_tcp_routing'
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y protobuf-compiler
-
-    - name: Clean generated files
-      if: matrix.example == 'envoy_tcp_routing'
-      run: |
-        rm -rf src/generated
-
     - name: Change crate type from library to binary
       run: |
         grep -v '^\[lib\]' Cargo.toml > Cargo.tmp

.gitignore

@@ -1,5 +1,3 @@
 /bazel-*
 target
 Cargo.lock
-# Generated protobuf code
-examples/envoy_tcp_routing/src/generated/

examples/envoy_tcp_routing/Cargo.toml

@@ -31,5 +31,4 @@ prost = "0.14"
 
 [build-dependencies]
 prost-build = "0.14"
-proc-macro2 = "1.0"
-
+protox = "0.9"

examples/envoy_tcp_routing/build.rs

@@ -12,14 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use std::fs;
-
 fn main() {
     println!("cargo:rerun-if-changed=src/set_envoy_filter_state.proto");
-    let out_dir = "src/generated";
-    fs::create_dir_all(out_dir).unwrap();
-    prost_build::Config::new()
-        .out_dir(out_dir)
-        .compile_protos(&["src/set_envoy_filter_state.proto"], &["src/"])
-        .unwrap();
+    let fds = protox::compile(["src/set_envoy_filter_state.proto"], ["src/"]).unwrap();
+    prost_build::compile_fds(fds).unwrap();
 }

examples/envoy_tcp_routing/src/lib.rs

@@ -32,7 +32,10 @@ use set_envoy_filter_state::{LifeSpan, SetEnvoyFilterStateArguments};
 
 // Include the generated protobuf code
 pub mod set_envoy_filter_state {
-    include!("generated/envoy.source.extensions.common.wasm.rs");
+    include!(concat!(
+        env!("OUT_DIR"),
+        "/envoy.source.extensions.common.wasm.rs"
+    ));
 }
 
 proxy_wasm::main! {{