Fix the bazel build

Author: olafurpg

build.sbt

@@ -144,7 +144,10 @@ lazy val scip = project
   .settings(
     moduleName := "scip-semanticdb",
     javaToolchainVersion := "8",
-    javaOnlySettings
+    javaOnlySettings,
+    (Compile / PB.targets) :=
+      Seq(PB.gens.java(V.protobuf) -> (Compile / sourceManaged).value),
+    Compile / PB.protocOptions := Seq("--experimental_allow_proto3_optional")
   )
   .dependsOn(semanticdb, scipProto)
 

scip-java-proto/src/main/protobuf/BUILD

@@ -0,0 +1,16 @@
+load("@rules_java//java:defs.bzl", "java_proto_library")
+load("@rules_proto//proto:defs.bzl", "proto_library")
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+java_proto_library(
+    name = "scip_java_proto",
+    deps = [":scip_proto"],
+)
+
+proto_library(
+    name = "scip_proto",
+    srcs = ["scip.proto"],
+)

scip-semanticdb/BUILD

@@ -18,6 +18,7 @@ java_library(
     srcs = glob(["src/main/java/**/*.java"]),
     deps = [
         ":all_java_proto",
+        "//scip-java-proto/src/main/protobuf:scip_java_proto",
         "//semanticdb-java",
         "//semanticdb-java/src/main/protobuf:semanticdb_java_proto",
         "@maven//:com_google_protobuf_protobuf_java",