Merge pull request #8185 from y-zeng/gen_proto_comment

Improve gen_reflection_proto.sh

include/grpc++/ext/reflection.grpc.pb.h

@@ -32,7 +32,7 @@
  */
 
 
-// Generated by the gRPC protobuf plugin.
+// Generated by tools/codegen/extensions/gen_reflection_proto.sh
 // If you make any local change, they will be lost.
 // source: reflection.proto
 // Original file comments:

include/grpc++/ext/reflection.pb.h

@@ -32,7 +32,7 @@
  */
 
 
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// Generated by tools/codegen/extensions/gen_reflection_proto.sh
 // source: reflection.proto
 
 #ifndef PROTOBUF_reflection_2eproto__INCLUDED

src/cpp/ext/reflection.grpc.pb.cc

@@ -32,7 +32,7 @@
  */
 
 
-// Generated by the gRPC protobuf plugin.
+// Generated by tools/codegen/extensions/gen_reflection_proto.sh
 // If you make any local change, they will be lost.
 // source: reflection.proto
 

src/cpp/ext/reflection.pb.cc

@@ -32,7 +32,7 @@
  */
 
 
-// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// Generated by tools/codegen/extensions/gen_reflection_proto.sh
 // source: reflection.proto
 
 #define INTERNAL_SUPPRESS_PROTOBUF_FIELD_DEPRECATION

tools/codegen/extensions/gen_reflection_proto.sh

@@ -29,20 +29,39 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+set -e
+cd $(dirname $0)/../../..
+
 PROTO_DIR="src/proto/grpc/reflection/v1alpha"
 PROTO_FILE="reflection"
 HEADER_DIR="include/grpc++/ext"
 SRC_DIR="src/cpp/ext"
 INCLUDE_DIR="grpc++/ext"
 TMP_DIR="tmp"
-GRPC_PLUGIN="bins/opt/grpc_cpp_plugin"
-PROTOC="bins/opt/protobuf/protoc"
 
-set -e
+if hash grpc_cpp_plugin 2>/dev/null; then
+  GRPC_PLUGIN=$(which grpc_cpp_plugin)
+else
+  if [ -f bins/opt/grpc_cpp_plugin ]; then
+    GRPC_PLUGIN="bins/opt/grpc_cpp_plugin"
+  else
+    echo "gRPC protoc plugin not found"
+    exit 1
+  fi
+fi
 
-TMP_DIR=${TMP_DIR}_${PROTO_FILE}
+if hash protoc 2>/dev/null; then
+  PROTOC=$(which protoc)
+else
+  if [ -f bins/opt/protobuf/protoc ]; then
+    PROTOC="bins/opt/protobuf/protoc"
+  else
+    echo "protoc not found"
+    exit 1
+  fi
+fi
 
-cd $(dirname $0)/../../..
+TMP_DIR=${TMP_DIR}_${PROTO_FILE}
 
 [ ! -d $HEADER_DIR ] && mkdir -p $HEADER_DIR || :
 [ ! -d $SRC_DIR ] && mkdir -p $SRC_DIR || :
@@ -56,6 +75,9 @@ sed -i "s/\"${PROTO_FILE}.pb.h\"/<${INCLUDE_DIR/\//\\\/}\/${PROTO_FILE}.pb.h>/g"
 sed -i "s/\"${PROTO_FILE}.pb.h\"/<${INCLUDE_DIR/\//\\\/}\/${PROTO_FILE}.pb.h>/g" ${TMP_DIR}/${PROTO_FILE}.grpc.pb.cc
 sed -i "s/\"${PROTO_FILE}.grpc.pb.h\"/<${INCLUDE_DIR/\//\\\/}\/${PROTO_FILE}.grpc.pb.h>/g" ${TMP_DIR}/${PROTO_FILE}.grpc.pb.cc
 
+sed -i "1s/.*/\/\/ Generated by tools\/codegen\/extensions\/gen_reflection_proto.sh/g" ${TMP_DIR}/*.pb.h
+sed -i "1s/.*/\/\/ Generated by tools\/codegen\/extensions\/gen_reflection_proto.sh/g" ${TMP_DIR}/*.pb.cc
+
 /bin/cp LICENSE ${TMP_DIR}/TMP_LICENSE
 sed -i -e "s/./ &/" -e "s/.*/ \*&/" ${TMP_DIR}/TMP_LICENSE
 sed -i -r "\$a\ *\n *\/\n\n"  ${TMP_DIR}/TMP_LICENSE