add grpc-ecosystem/openapiv2 plugin (#293)

Add the protoc-gen-openapiv2 plugin from grpc-gateway.

Fixes #250.

plugins/grpc-ecosystem/openapiv2/source.yaml

@@ -0,0 +1,4 @@
+source:
+  github:
+    owner: grpc-ecosystem
+    repository: grpc-gateway

plugins/grpc-ecosystem/openapiv2/v2.15.0/.dockerignore

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

plugins/grpc-ecosystem/openapiv2/v2.15.0/Dockerfile

@@ -0,0 +1,11 @@
+# syntax=docker/dockerfile:1.4
+FROM golang:1.19.4-bullseye AS build
+RUN --mount=type=cache,target=/go/pkg/mod \
+    CGO_ENABLED=0 \
+    go install -ldflags="-s -w" -trimpath github.com/grpc-ecosystem/grpc-gateway/v2/[email protected]
+
+FROM scratch
+COPY --from=build --link --chown=root:root /etc/passwd /etc/passwd
+COPY --from=build --link /go/bin/protoc-gen-openapiv2 /
+USER nobody
+ENTRYPOINT [ "/protoc-gen-openapiv2" ]

plugins/grpc-ecosystem/openapiv2/v2.15.0/buf.plugin.yaml

@@ -0,0 +1,7 @@
+version: v1
+name: buf.build/grpc-ecosystem/openapiv2
+plugin_version: v2.15.0
+source_url: https://github.com/grpc-ecosystem/grpc-gateway
+description: Generates OpenAPI definitions for Protobuf services.
+spdx_license_id: BSD-3-Clause
+license_url: https://github.com/grpc-ecosystem/grpc-gateway/blob/v2.15.0/LICENSE.txt

tests/testdata/buf.build/grpc-ecosystem/openapiv2/v2.15.0/eliza/plugin.sum

@@ -0,0 +1 @@
+h1:UttB5XSQcdk/XyJbzkI9uqHCv5StxSjK0u5mrWJweoU=

tests/testdata/buf.build/grpc-ecosystem/openapiv2/v2.15.0/petapis/plugin.sum

@@ -0,0 +1 @@
+h1:kbnot+zVGjxK+SAIaEjtKgvlHNA+4RVmP6bjvSYh9JA=