feat(parser): add platform-specific parsers and argument conventions

Implement platform-specific parsers for Windows, Linux, and macOS
Add GNU argument convention implementations
Create fake parser for testing purposes
Update CMakeLists to include new headers

src/main.cpp

@@ -1,32 +1,103 @@
-#include "../include/argument_parser.hpp"
-#include "../include/linux_parser.hpp"
-#include "../include/gnu_argument_convention.hpp"
-#include <initializer_list>
+#include "argument_parser.hpp"
+#include "fake_parser.hpp"
+#include <argparse>
+#include <cstdlib>
 #include <iostream>
+#include <fstream>
+#include <memory>
+#include <utility>
+#include <vector>
 
 using namespace argument_parser::conventions;
 
-int main() {
-    auto parametered_action = argument_parser::helpers::make_parametered_action_ptr<std::string>([](std::string const& test) {
-        std::cout << test << std::endl; 
-    });
+const std::initializer_list<argument_parser::conventions::convention const* const> conventions = {
+    &gnu_argument_convention,
+    &gnu_equal_argument_convention 
+}; 
 
-    auto parser = argument_parser::linux_parser{}; 
-    parser.add_argument("e", "echo", "echoes given variable", *parametered_action, false); 
-    parser.add_argument("re", "required_echo", "required echo", *parametered_action, true); 
+const auto echo = argument_parser::helpers::make_parametered_action<std::string>([](std::string const& text) {
+    std::cout << text << std::endl; 
+});
 
-    std::initializer_list<argument_parser::conventions::convention const* const> conventions = {
-        &gnu_argument_convention,
-        &gnu_equal_argument_convention 
+const auto cat = argument_parser::helpers::make_parametered_action<std::string>([](std::string const& file_name) {
+    std::ifstream file(file_name);
+    if (!file.is_open()) {
+        throw std::runtime_error("Could not open file");
+    }
+    std::string line;
+    while (std::getline(file, line)) {
+        std::cout << line << std::endl;
+    }
+
+    file.close();
+});
+
+auto make_grep_action(argument_parser::base_parser& parser) {
+    std::shared_ptr<std::string> filename = std::make_shared<std::string>(""); 
+    std::shared_ptr<bool> grep_requested = std::make_shared<bool>(false);
+    std::shared_ptr<bool> grep_called = std::make_shared<bool>(false);
+    std::shared_ptr<std::string> pattern = std::make_shared<std::string>(); 
+
+    auto grep_impl = [&parser] (std::string const& filename, std::string const& pattern) {
+        if (filename.empty()) {
+            std::cerr << "Missing filename" << std::endl; 
+            parser.display_help(conventions); 
+            exit(-1); 
+        }
+        std::ifstream file(filename);
+        if (!file.is_open()) {
+            std::cerr << "Could not open file: \"" << filename << '"' << std::endl; 
+            exit(-1);
+        }
+        std::string line;
+        while (std::getline(file, line)) {
+            if (line.find(pattern) != std::string::npos) {
+                std::cout << line << std::endl;
+            }
+        }
+        file.close();
     }; 
 
-    parser.add_argument("h", "help", "Displays this help text.", argument_parser::helpers::make_non_parametered_action([&parser, conventions]{
+    const auto filename_action = argument_parser::helpers::make_parametered_action<std::string>([filename, grep_called, grep_requested, &grep_impl, pattern](std::string const& file_name) {
+        std::ifstream file(file_name);
+        if (!file.is_open()) {
+            throw std::runtime_error("Could not open file");
+        }
+        *filename = file_name;
+        file.close();
+        if (*grep_requested && !(*grep_called)) {
+            grep_impl(file_name, *pattern);
+            *grep_called = true; 
+        }
+    });
+
+    const auto grep = argument_parser::helpers::make_parametered_action<std::string>([filename, &parser, &grep_impl, grep_requested, grep_called, pattern](std::string const& p) {
+        *grep_requested = true;
+        if (!filename || filename -> empty()) {
+            *grep_called = false; 
+            *pattern = p; 
+            return; 
+        }
+        grep_impl(*filename,  p);
+        *grep_called = true; 
+    });
+
+    return std::pair { filename_action, grep };
+}
+
+int main() {
+    std::vector<std::string> fake_args = { "-g", "add", "-f", "src/main.cpp" };
+    auto parser = argument_parser::fake_parser{"test", std::move(fake_args)};
+    auto [file, grep] = make_grep_action(parser); 
+    parser.add_argument("e", "echo", "echoes given variable", echo, false);
+    parser.add_argument("f", "file", "File to grep, required only if using grep", file, false);
+    parser.add_argument("g", "grep", "Grep pattern, required only if using grep", grep, false);
+    parser.add_argument("c", "cat", "Prints the content of the file", cat, false);
+    parser.add_argument("h", "help", "Displays this help text.", argument_parser::helpers::make_non_parametered_action([&parser]{
         parser.display_help(conventions); 
     }), false);
 
     parser.handle_arguments(conventions);
 
-    
-
     return 0; 
 }