Redesign the Rust crates.

See rust/README.md for more details.

Signed-off-by: Steffen Smolka <[email protected]>

Author: smolkaj

.github/workflows/ci-build-proto.yml renamed to .github/workflows/bazel-build.yml

@@ -1,4 +1,4 @@
-name: "build protobufs"
+name: "Bazel build of protobufs"
 
 on:
   push:

.github/workflows/google-rpc-status-synced.yml

@@ -0,0 +1,21 @@
+name: Ensure google/rpc/status.proto is synced with upstream.
+
+on:
+  pull_request:
+
+jobs:
+  check-google-rpc-status-synced:
+    runs-on: [ubuntu-latest]
+    steps:
+    - uses: actions/checkout@v5
+    - run: ./proto/update_google_rpc_status.sh
+    - run: |
+        DIFF=$(git diff proto/google/rpc/status.proto)
+        if [ -n "$DIFF" ]; then
+          echo "$DIFF"
+          echo ""
+          echo "ERROR: proto/google/rpc/status.proto is not synced with upstream."
+          echo "Please run ./proto/update_google_rpc_status.sh to fix it."
+          exit 1
+        fi
+        echo "SUCCESS: proto/google/rpc/status.proto is synced with upstream."

.github/workflows/rust-build.yml

@@ -0,0 +1,14 @@
+name: "Rust build"
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: [ubuntu-latest]
+    steps:
+    - uses: actions/checkout@v5
+    - run: cd rust && cargo build
+    - run: cd rust && cargo test

CI/check_codegen.sh

@@ -8,7 +8,6 @@ pushd "$THIS_DIR/.." >/dev/null
 
 rm -rf go/*
 rm -rf py/p4
-rm -rf rust/src
 ./codegen/update.sh
 
 diff="$(git status --porcelain go go.mod go.sum)"
@@ -27,14 +26,4 @@ if [ ! -z "$diff" ]; then
     exit 1
 fi
 
-diff="$(git status --porcelain rust)"
-
-if [ ! -z "$diff" ]; then
-    echo "The generated Rust files are not up-to-date"
-    echo "DIFF:"
-    echo "$diff"
-    echo "You can regenerate them with './codegen/update.sh' and commit the changes"
-    exit 1
-fi
-
 popd >/dev/null

README.md

@@ -179,13 +179,7 @@ pip3 install p4runtime==1.3.0
 
 ### Rust
 
-To include the P4Runtime Rust crate to your project, add this repository url to
-your `Cargo.toml` file:
-
-```toml
-[dependencies]
-p4runtime = { git = "https://github.com/p4lang/p4runtime.git" }
-```
+See the [rust/README.md](rust/README.md).
 
 ## Guidelines for using Protocol Buffers (protobuf) in backwards-compatible ways
 

codegen/Dockerfile

@@ -6,7 +6,7 @@ LABEL description="Dockerfile used for CI testing of p4lang/p4runtime"
 ARG DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends software-properties-common git curl build-essential
+    apt-get install -y --no-install-recommends software-properties-common git curl
 
 ARG GO_VERSION=1.20.5
 
@@ -26,11 +26,5 @@ ENV PATH="${PATH}:/usr/local/go/bin:/root/go/bin"
 RUN go install google.golang.org/protobuf/cmd/[email protected]
 RUN go install google.golang.org/grpc/cmd/[email protected]
 
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain 1.81.0 --profile minimal; \
-    . $HOME/.cargo/env; \
-    cargo install --locked [email protected] [email protected] [email protected]
-
-ENV PATH="${PATH}:/root/.cargo/bin"
-
 COPY . /p4runtime/
 WORKDIR /p4runtime/

codegen/compile_protos.sh

@@ -33,27 +33,18 @@ set -e
 THIS_DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)"
 PROTO_DIR="$THIS_DIR/../proto"
 
-tmpdir="$(mktemp -d)"
-pushd "$tmpdir" > /dev/null
-git clone --depth 1 https://github.com/googleapis/googleapis.git
-popd > /dev/null
-GOOGLE_PROTO_DIR="$tmpdir/googleapis"
-
 PROTOS="\
 $PROTO_DIR/p4/v1/p4data.proto \
 $PROTO_DIR/p4/v1/p4runtime.proto \
 $PROTO_DIR/p4/config/v1/p4info.proto \
-$PROTO_DIR/p4/config/v1/p4types.proto \
-$GOOGLE_PROTO_DIR/google/rpc/status.proto \
-$GOOGLE_PROTO_DIR/google/rpc/code.proto"
+$PROTO_DIR/p4/config/v1/p4types.proto"
 
-PROTOFLAGS="-I$GOOGLE_PROTO_DIR -I$PROTO_DIR"
+PROTOFLAGS="-I$PROTO_DIR"
 
 mkdir -p "$BUILD_DIR/cpp_out"
 mkdir -p "$BUILD_DIR/grpc_out"
 mkdir -p "$BUILD_DIR/py_out"
 mkdir -p "$BUILD_DIR/go_out"
-mkdir -p "$BUILD_DIR/rust_out"
 
 set -o xtrace
 $PROTOC $PROTOS --cpp_out "$BUILD_DIR/cpp_out" $PROTOFLAGS
@@ -66,18 +57,4 @@ $PROTOC $PROTOS --python_out "$BUILD_DIR/py_out" $PROTOFLAGS --grpc_out "$BUILD_
 
 $PROTOC $PROTOS --go_out="$BUILD_DIR/go_out" --go-grpc_out="$BUILD_DIR/go_out" $PROTOFLAGS
 
-$PROTOC $PROTOS $PROTOFLAGS \
-    --prost_out="$BUILD_DIR/rust_out/src" \
-    --prost_opt=compile_well_known_types \
-    --prost_opt=extern_path=.google.protobuf=::pbjson_types \
-    --tonic_out="$BUILD_DIR/rust_out/src" \
-    --tonic_opt=compile_well_known_types \
-    --tonic_opt=extern_path=.google.protobuf=::pbjson_types \
-    --prost-crate_out="$BUILD_DIR/rust_out" \
-    --prost-crate_opt="gen_crate=rust/Cargo.toml"
-
-set +o xtrace
-
-rm -rf "$tmpdir"
-
 echo "SUCCESS"

codegen/update.sh

@@ -21,9 +21,6 @@ cp -r "$tmpdir"/go_out/github.com/p4lang/p4runtime/go/* go/
 cp -r "$tmpdir"/py_out/p4 py/
 find py/p4 -type d -exec touch {}/__init__.py \;
 
-# Rust
-cp -r "$tmpdir"/rust_out/* rust/
-
 # Cleanup files owned by root user
 docker run --rm \
        -v "$tmpdir:/tmp/gen" \

proto/google/rpc/status.proto

@@ -0,0 +1,49 @@
+// Copyright 2025 Google LLC
+//
+// Licensed 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.
+
+syntax = "proto3";
+
+package google.rpc;
+
+import "google/protobuf/any.proto";
+
+option cc_enable_arenas = true;
+option go_package = "google.golang.org/genproto/googleapis/rpc/status;status";
+option java_multiple_files = true;
+option java_outer_classname = "StatusProto";
+option java_package = "com.google.rpc";
+option objc_class_prefix = "RPC";
+
+// The `Status` type defines a logical error model that is suitable for
+// different programming environments, including REST APIs and RPC APIs. It is
+// used by [gRPC](https://github.com/grpc). Each `Status` message contains
+// three pieces of data: error code, error message, and error details.
+//
+// You can find out more about this error model and how to work with it in the
+// [API Design Guide](https://cloud.google.com/apis/design/errors).
+message Status {
+  // The status code, which should be an enum value of
+  // [google.rpc.Code][google.rpc.Code].
+  int32 code = 1;
+
+  // A developer-facing error message, which should be in English. Any
+  // user-facing error message should be localized and sent in the
+  // [google.rpc.Status.details][google.rpc.Status.details] field, or localized
+  // by the client.
+  string message = 2;
+
+  // A list of messages that carry the error details.  There is a common set of
+  // message types for APIs to use.
+  repeated google.protobuf.Any details = 3;
+}

proto/update_google_rpc_status.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+#
+# Updates proto/google/rpc/status.proto with the latest version from the
+# official upstream repository.
+#
+# The file is very stable and hasn't changed in many years, but we enforce
+# freshness of this copy using a GitHub Actions workflow just in case.
+
+set -e
+
+STATUS_PROTO_URL="https://raw.githubusercontent.com/googleapis/googleapis/refs/heads/master/google/rpc/status.proto"
+THIS_DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)"
+
+wget "$STATUS_PROTO_URL" -O "$THIS_DIR/google/rpc/status.proto"