[ggj][bazel] fix: rename protoc plugin binary (#296)

* fix: refactor and rename Bazel rules to use googleapis' toolchain

* fix: simplify Bazel rules post-refactoring

* fix: rename protoc plugin binary

BUILD.bazel

@@ -28,7 +28,7 @@ java_proto_library(
 # ============= Binary targets ================
 
 java_binary(
-    name = "protoc-gen-gapic-java",
+    name = "protoc-gen-java_gapic",
     srcs = [
         "//src/main/java/com/google/api/generator:generator_files",
     ],

DEVELOPMENT.md

@@ -35,15 +35,15 @@ below are temporary and better ones will be coming.
 4.  Build this plugin.
 
     ```sh
-    bazel build :protoc-gen-gapic-java
+    bazel build :protoc-gen-java_gapic
     ```
 
 5.  Run the plugin. At this stage, it will not do anything except write
     hardcoded Java into two files.
 
     ```
     protoc -I=${PROTOC_INCLUDE_DIR} -I=${GOOGLEAPIS_DIR} -I=${YOUR_PROTO_DIR} \
-        --plugin=bazel-bin/protoc-gen-gapic-java ~/dev/googleapis/google/showcase/v1test/*.proto \
+        --plugin=bazel-bin/protoc-gen-java_gapic ~/dev/googleapis/google/showcase/v1test/*.proto \
         --gapic-java_out=/tmp/test
     ```
 

run.sh

@@ -59,10 +59,10 @@ then
 fi
 
 # Build if needed.
-if [[ "${FLAGS_use_cached}" == 0 ]] || [[ ! -f bazel-bin/protoc-gen-gapic-java ]]
+if [[ "${FLAGS_use_cached}" == 0 ]] || [[ ! -f bazel-bin/protoc-gen-java_gapic ]]
 then
   echo_success "Rebuilding the microgenerator..."
-  bazel build :protoc-gen-gapic-java
+  bazel build :protoc-gen-java_gapic
   if [[ $? -ne 0 ]]
   then
     echo_error "Build failed."
@@ -75,9 +75,9 @@ fi
 # Run protoc.
 protoc -I="${PROTOC_INCLUDE_DIR}" -I="${FLAGS_googleapis}" -I="${FLAGS_protos}" \
     -I="${FLAGS_googleapis}/google/longrunning" \
-    --plugin=bazel-bin/protoc-gen-gapic-java ${FLAGS_protos}/*.proto \
-    --gapic-java_out="${FLAGS_out}" \
-    --gapic-java_opt="${FLAGS_service_config},${FLAGS_gapic_config}" \
+    --plugin=bazel-bin/protoc-gen-java_gapic ${FLAGS_protos}/*.proto \
+    --java_gapic_out="${FLAGS_out}" \
+    --java_gapic_opt="${FLAGS_service_config},${FLAGS_gapic_config}" \
     --experimental_allow_proto3_optional
 
 echo_success "Output files written to ${FLAGS_out}"