anapaya-hackathon: generate connect rpc code with bazel

Generate the connect rpc code with bazel to not depend on buf being installed
on the host.

Makefile

@@ -59,6 +59,8 @@ protobuf:
 	cp -r bazel-bin/pkg/proto/*/*/go_default_library_/github.com/scionproto/scion/pkg/proto/* pkg/proto
 	chmod 0644 pkg/proto/*/*.pb.go
 
+	bazel run @buf//:buf -- generate --output $(PWD) --path proto
+
 mocks:
 	tools/gomocks.py
 

WORKSPACE

@@ -220,6 +220,14 @@ container_pull(
     tag = "10",
 )
 
+# Buf CLI to generate connect-go
+http_archive(
+    name = "buf",
+    build_file_content = "exports_files([\"buf\"])",
+    strip_prefix = "buf/bin",
+    urls = ["https://github.com/bufbuild/buf/releases/download/v1.28.1/buf-Linux-x86_64.tar.gz"],
+)
+
 # protobuf/gRPC
 http_archive(
     name = "rules_proto_grpc",

buf.gen.yaml

@@ -1,8 +1,5 @@
 version: v1
 plugins:
-  - plugin: go
-    out: gen
-    opt: paths=source_relative
   - plugin: connect-go
-    out: gen
+    out: pkg
     opt: paths=source_relative