Add connectrpc/rust plugin

baseimages/Dockerfile.rust

@@ -1,3 +1,3 @@
-FROM rust:1.96.1-alpine3.23@sha256:14b9b5f47dcc6644d0f0c1b35a2c2c5d0124f67159aaee28a348627523459b55
+FROM rust:1.96.1-alpine3.24@sha256:a41f7740f8b45d45795624eec13a8b42263cc700f19f7e4e86e04d3dda08a479
 
 CMD echo this is a dummy file used to automate dependency upgrades for plugins

plugins/anthropics/connect-rust/v0.7.0/buf.plugin.yaml

@@ -9,6 +9,7 @@ output_languages:
   - rust
 spdx_license_id: Apache-2.0
 license_url: https://github.com/anthropics/connect-rust/blob/v0.7.0/LICENSE
+deprecated: true
 registry:
   cargo:
     rust_version: "1.88"

plugins/connectrpc/rust/source.yaml

@@ -0,0 +1,3 @@
+source:
+  crates:
+    crate_name: connectrpc-codegen

plugins/connectrpc/rust/v0.8.0/.dockerignore

@@ -0,0 +1,2 @@
+*
+!Dockerfile

plugins/connectrpc/rust/v0.8.0/Dockerfile

@@ -0,0 +1,17 @@
+# syntax=docker/dockerfile:1.24
+FROM rust:1.96.1-alpine3.24@sha256:a41f7740f8b45d45795624eec13a8b42263cc700f19f7e4e86e04d3dda08a479 AS builder
+RUN apk add --no-cache musl-dev
+WORKDIR /app
+ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
+# The protoc-gen-connect-rust binary is a [[bin]] target in the
+# connectrpc-codegen crate. cargo install compiles it by crate name.
+RUN --mount=type=cache,target=/usr/local/cargo/registry,sharing=locked --mount=type=cache,target=/root/target \
+    cargo install connectrpc-codegen --version 0.8.0 --locked --root /app
+
+FROM gcr.io/distroless/static-debian13:latest@sha256:3592aa8171c77482f62bbc4164e6a2d141c6122554ace66e5cc910cadb961ff0 AS base
+
+FROM scratch
+COPY --link --from=base / /
+COPY --link --from=builder /app/bin/protoc-gen-connect-rust /protoc-gen-connect-rust
+USER nobody
+ENTRYPOINT ["/protoc-gen-connect-rust"]

plugins/connectrpc/rust/v0.8.0/buf.plugin.yaml

@@ -0,0 +1,55 @@
+version: v1
+name: buf.build/connectrpc/rust
+plugin_version: v0.8.0
+source_url: https://github.com/connectrpc/connect-rust
+description: Generates ConnectRPC service traits, typed clients, and monomorphic dispatchers for Rust. Compatible with the Connect, gRPC, and gRPC-Web protocols.
+deps:
+  - plugin: buf.build/anthropics/buffa:v0.8.1
+output_languages:
+  - rust
+spdx_license_id: Apache-2.0
+license_url: https://github.com/connectrpc/connect-rust/blob/v0.8.0/LICENSE
+registry:
+  cargo:
+    rust_version: "1.88"
+    deps:
+      # ConnectRPC runtime: Router, Context, ConnectError, client transports.
+      # https://github.com/connectrpc/connect-rust/blob/v0.8.0/connectrpc/Cargo.toml
+      - name: "connectrpc"
+        req: "0.8.0"
+        default_features: true
+      # Generated service stubs use buffa::Message, buffa::view::OwnedView,
+      # buffa::bytes::Bytes directly. Message types live in the buffa SDK
+      # crate (via the plugin dep above); this dep is for the runtime API.
+      - name: "buffa"
+        req: "0.8.1"
+        default_features: true
+      # Well-known types. Service stubs whose request/response types are
+      # WKTs (e.g. google.longrunning.Operations) reference them as
+      # `::buffa_types::google::protobuf::...`, mirroring buffa-codegen's
+      # extern_path mapping for `.google.protobuf`. Must be a direct dep
+      # so the `::buffa_types` path resolves in the generated crate.
+      - name: "buffa-types"
+        req: "0.8.1"
+        default_features: true
+        features:
+          - json
+      # Streaming method signatures use futures::Stream.
+      - name: "futures"
+        req: "0.3"
+        default_features: true
+      # Client transport bounds reference http_body::Body.
+      - name: "http-body"
+        req: "1"
+        default_features: true
+  # The plugin accepts `extern_path=.=<rust_path>` (or the shorthand
+  # `buffa_module=<rust_path>`) to tell it where the buffa-generated message
+  # types live. BSR should inject this based on the buffa dep's SDK crate
+  # name, same as tonic receives extern_path for its prost dep. Leaving
+  # it out here; please advise if an explicit entry is needed.
+  opts:
+    # Emit one `<dotted.package>.rs` per proto package, mirroring the
+    # buffa plugin's `file_per_package=true` opt. Matches the
+    # prost/tonic filename convention the BSR Rust SDK lib.rs
+    # synthesis expects.
+    - file_per_package

tests/plugins_test.go

@@ -81,6 +81,7 @@ exec docker run --log-driver=none --rm -i {{.ImageName}}:{{.Version}} "$@"
 		// build time. The standalone test harness has no dep chain, so provide
 		// a placeholder catch-all mapping.
 		"buf.build/anthropics/connect-rust": {"extern_path=.=crate"},
+		"buf.build/connectrpc/rust":         {"extern_path=.=crate"},
 	}
 	// Some plugins do not generate any code for the test protos, so we allow an empty plugin.sum file for these
 	// plugins. The format of the map is map[pluginName]map[image]bool, where the bool indicates whether an empty

tests/testdata/buf.build/connectrpc/rust/v0.8.0/eliza/plugin.sum

@@ -0,0 +1 @@
+h1:QLUIhPVdSGhw2579QrDFYJHrubR+tyRjQoMOu+GVhnY=

tests/testdata/buf.build/connectrpc/rust/v0.8.0/petapis/plugin.sum

@@ -0,0 +1 @@
+h1:G23VgSBmPDKsPIJcoLEfAqEzZqtHuPV9K0D/rSa3OLs=