flow: move schemas into a dedicated directory

This helps exposing them with docker-compose.

Makefile

@@ -47,8 +47,8 @@ $(BIN)/protoc-gen-go: PACKAGE=google.golang.org/protobuf/cmd/protoc-gen-go
 
 # Generated files
 
-%.pb.go: %.proto | $(PROTOC_GEN_GO) ; $(info $(M) compiling protocol buffers definition…)
+flow/%.pb.go: flow/data/schemas/%.proto | $(PROTOC_GEN_GO) ; $(info $(M) compiling protocol buffers definition…)
-	$Q $(PROTOC) -I=. --plugin=$(PROTOC_GEN_GO) --go_out=. --go_opt=paths=source_relative $<
+	$Q $(PROTOC) -I=. --plugin=$(PROTOC_GEN_GO) --go_out=. --go_opt=module=$(MODULE) $<
 
 web/data: mkdocs.yml $(wildcard docs/*.md docs/assets/*) ; $(info $(M) build documentation) @ ## Build documentation
 	$Q rm -rf web/data

docker-compose-dev.yml

@@ -30,4 +30,4 @@ services:
       - 8123:8123/tcp
       - 9000:9000/tcp
     volumes:
-      - ./flow/flow-v0.proto:/var/lib/clickhouse/format_schemas/flow-v0.proto:ro
+      - ./flow/data/schemas:/var/lib/clickhouse/format_schemas:ro

flow/schemas.go

@@ -16,13 +16,13 @@ const CurrentSchemaVersion = 0
 var (
 	// VersionedSchemas is a mapping from schema version to protobuf definitions
 	VersionedSchemas map[int]string
-	//go:embed flow*.proto
+	//go:embed data/schemas/flow*.proto
 	schemas embed.FS
 )
 
 func init() {
 	VersionedSchemas = make(map[int]string)
-	entries, err := schemas.ReadDir(".")
+	entries, err := schemas.ReadDir("data/schemas")
 	if err != nil {
 		panic(err)
 	}
@@ -34,7 +34,7 @@ func init() {
 		if err != nil {
 			panic(err)
 		}
-		f, err := schemas.Open(entry.Name())
+		f, err := schemas.Open(fmt.Sprintf("data/schemas/%s", entry.Name()))
 		if err != nil {
 			panic(err)
 		}