fix: ipns protobuf namespace conflict (#794)

* fix: ipns protobuf namespace conflict
* Prefer `go generate` to `Makefile` for code generation

---------

Co-authored-by: Andrew Gillis <[email protected]>

CHANGELOG.md

@@ -30,7 +30,7 @@ The following emojis are used to highlight certain changes:
 ### Fixed
 
 - `gateway` Fix redirect URLs for subdirectories with characters that need escaping. [#779](https://github.com/ipfs/boxo/pull/779)
-- `ipns` Defined a `go_package` name in `ipns-record.proto` to avoid protobuf conflicts [#789](https://github.com/ipfs/boxo/pull/789)
+- `ipns` Fix `ipns` protobuf namespace conflicts by using full package name `github.com/ipfs/boxo/ipns/pb/record.proto` instead of the generic `record.proto` [#794](https://github.com/ipfs/boxo/pull/794)
 
 ### Security
 

ipns/pb/gen.go

@@ -0,0 +1,20 @@
+// These commands work around namespace conflicts that occur when multiple
+// repositories depend on .proto files with generic filenames. Due to the way
+// protobuf registers files (e.g., foo.proto or pb/foo.proto), naming
+// collisions can occur when the same filename is used across different
+// packages.
+//
+// The only way to generate a *.pb.go file that includes the full package path
+// (e.g., github.com/org/repo/pb/foo.proto) is to place the .proto file in a
+// directory structure that mirrors its package path.
+//
+// References:
+//   - https://protobuf.dev/reference/go/faq#namespace-conflict
+//   - https://github.com/golang/protobuf/issues/1122#issuecomment-2045945265
+//
+//go:generate mkdir -p github.com/ipfs/boxo/ipns/pb
+//go:generate ln -f record.proto github.com/ipfs/boxo/ipns/pb/
+//go:generate protoc --go_out=. github.com/ipfs/boxo/ipns/pb/record.proto
+//go:generate mv -f github.com/ipfs/boxo/ipns/pb/record.pb.go .
+//go:generate rm -rf github.com
+package pb