Switching to argagg for CLI parsing

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "dep/rtaudio"]
 	path = dep/rtaudio
 	url = https://github.com/thestk/rtaudio.git
+[submodule "dep/argagg"]
+	path = dep/argagg
+	url = https://github.com/vietjtnguyen/argagg.git

dep/Makefile

@@ -50,8 +50,9 @@ nanosvg = include/nanosvg.h
 oui-blendish = include/blendish.h
 osdialog = include/osdialog.h
 pffft = include/pffft.h
+argagg = include/argagg.hpp
 
-DEPS += $(glew) $(glfw) $(jansson) $(libspeexdsp) $(libcurl) $(libzip) $(rtmidi) $(rtaudio) $(nanovg) $(nanosvg) $(oui-blendish) $(osdialog) $(pffft)
+DEPS += $(glew) $(glfw) $(jansson) $(libspeexdsp) $(libcurl) $(libzip) $(rtmidi) $(rtaudio) $(nanovg) $(nanosvg) $(oui-blendish) $(osdialog) $(pffft) $(argagg)
 include $(RACK_DIR)/dep.mk
 
 
@@ -163,6 +164,9 @@ $(pffft):
 	$(WGET) "https://bitbucket.org/jpommier/pffft/get/29e4f76ac53b.zip"
 	$(UNZIP) 29e4f76ac53b.zip
 	cp jpommier-pffft-29e4f76ac53b/*.h include/
+	
+$(argagg): $(wildcard argagg/include/argagg/*.hpp)
+	cp argagg/include/argagg/*.hpp include/
 
 clean:
 	git clean -fdx

dep/argagg

@@ -0,0 +1 @@
+Subproject commit 24f1dd7fd222b2c70b1f02109761f6bc698e5f68

src/main.cpp

@@ -13,6 +13,8 @@
 #include "util/color.hpp"
 
 #include "osdialog.h"
+#include "argagg.hpp"
+
 #include <unistd.h>
 
 
@@ -24,18 +26,33 @@ int main(int argc, char* argv[]) {
 	std::string patchFile;
 
 	// Parse command line arguments
-	int c;
-	opterr = 0;
-	while ((c = getopt(argc, argv, "d")) != -1) {
-		switch (c) {
-			case 'd': {
-				devMode = true;
-			} break;
-			default: break;
-		}
+	argagg::parser argparser {{
+	    { "help", {"-h", "--help"}, "shows this help message", 0},
+	    { "devmod", {"-d", "--devmod"}, "enable dev mode", 0},
+	}};
+
+	argagg::parser_results args;
+
+	try {
+	  args = argparser.parse(argc, argv);
+	} catch (const std::exception& e) {
+	  std::cerr << "Encountered exception while parsing arguments: " << e.what() << std::endl;
+	  return EXIT_FAILURE;
 	}
-	if (optind < argc) {
-		patchFile = argv[optind];
+
+	if (args["help"]) {
+	  std::cerr << "Usage: program [options] [FILENAME]" << std::endl;
+	  std::cerr << argparser;
+	  return EXIT_SUCCESS;
+	}
+
+	if (args["devmod"]) {
+	  devMode = true;
+	}
+
+	// Filename as first positional argument
+	if (args.pos.size() > 0) {
+	  patchFile = args.as<std::string>(0);
 	}
 
 	// Initialize environment