add vctest (WIP)

src/util/command_line.cpp

@@ -1,48 +1,16 @@
 #include "command_line.hpp"
 
-#include <cstring>
 #include <filesystem>
 #include <iostream>
-#include <stdexcept>
-#include <string>
 
 #include "files/engine_paths.hpp"
+#include "util/ArgsReader.hpp"
 #include "engine.hpp"
 
 namespace fs = std::filesystem;
 
-class ArgsReader {
-    const char* last = "";
-    char** argv;
-    int argc;
-    int pos = 0;
-public:
-    ArgsReader(int argc, char** argv) : argv(argv), argc(argc) {
-    }
-
-    void skip() {
-        pos++;
-    }
-
-    bool hasNext() const {
-        return pos < argc && strlen(argv[pos]);
-    }
-
-    bool isKeywordArg() const {
-        return last[0] == '-';
-    }
-
-    std::string next() {
-        if (pos >= argc) {
-            throw std::runtime_error("unexpected end");
-        }
-        last = argv[pos];
-        return argv[pos++];
-    }
-};
-
 static bool perform_keyword(
-    ArgsReader& reader, const std::string& keyword, CoreParameters& params
+    util::ArgsReader& reader, const std::string& keyword, CoreParameters& params
 ) {
     if (keyword == "--res") {
         auto token = reader.next();
@@ -53,22 +21,25 @@ static bool perform_keyword(
     } else if (keyword == "--help" || keyword == "-h") {
         std::cout << "VoxelEngine command-line arguments:\n";
         std::cout << " --help - show help\n";
-        std::cout << " --res [path] - set resources directory\n";
-        std::cout << " --dir [path] - set userfiles directory\n";
+        std::cout << " --res <path> - set resources directory\n";
+        std::cout << " --dir <path> - set userfiles directory\n";
         std::cout << " --headless - run in headless mode\n";
+        std::cout << " --test <path> - test script file\n";
         std::cout << std::endl;
         return false;
     } else if (keyword == "--headless") {
         params.headless = true;
+    } else if (keyword == "--test") {
+        auto token = reader.next();
+        params.testFile = fs::u8path(token);
     } else {
-        std::cerr << "unknown argument " << keyword << std::endl;
-        return false;
+        throw std::runtime_error("unknown argument " + keyword);
     }
     return true;
 }
 
 bool parse_cmdline(int argc, char** argv, CoreParameters& params) {
-    ArgsReader reader(argc, argv);
+    util::ArgsReader reader(argc, argv);
     reader.skip();
     while (reader.hasNext()) {
         std::string token = reader.next();