From 3b227611d5c5b216fd323908b0c6c4af19777a52 Mon Sep 17 00:00:00 2001 From: Dennis Cappendijk Date: Mon, 22 May 2017 16:21:48 +0200 Subject: show help if protoc is called without any arguments, pre-empts -h and --help to show a useful message instead of just 'Missing input file.' --- src/google/protobuf/compiler/command_line_interface.cc | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src') diff --git a/src/google/protobuf/compiler/command_line_interface.cc b/src/google/protobuf/compiler/command_line_interface.cc index 7fcd0083..df03907d 100644 --- a/src/google/protobuf/compiler/command_line_interface.cc +++ b/src/google/protobuf/compiler/command_line_interface.cc @@ -1012,6 +1012,12 @@ CommandLineInterface::ParseArguments(int argc, const char* const argv[]) { arguments.push_back(argv[i]); } + // if no arguments are given, show help + if(arguments.empty()) { + PrintHelpText(); + return PARSE_ARGUMENT_DONE_AND_EXIT; // Exit without running compiler. + } + // Iterate through all arguments and parse them. for (int i = 0; i < arguments.size(); ++i) { string name, value; -- cgit v1.2.3