feat: finish clap manual namespace

src/yycc/carton/clap/manual.cpp

@@ -3,6 +3,7 @@
 #include "../../patch/stream.hpp"
 #include "../../patch/format.hpp"
 #include "../../string/op.hpp"
+#include "../../rust/env.hpp"
 #include <ranges>
 
 #define CLAP ::yycc::carton::clap
@@ -10,6 +11,7 @@
 #define TERMCOLOR ::yycc::carton::termcolor
 #define OP ::yycc::string::op
 #define FORMAT ::yycc::patch::format
+#define ENV ::yycc::rust::env
 
 using namespace ::yycc::patch::stream;
 
@@ -107,8 +109,12 @@ namespace yycc::carton::clap::manual {
     void Manual::print_help(std::ostream &dst) const {
         this->print_version();
 
-        TERMCOLOR::cprintln(trctx.usage_title, TERMCOLOR::Color::Yellow, TERMCOLOR::Color::Default, TERMCOLOR::Attribute::Default, dst);
+        // only print usage if we can fetch the name of executable
-        dst << INDENT << FORMAT::format(trctx.usage_body, app.get_summary().get_bin_name()) << std::endl;
+        auto executable = ENV::current_exe();
+        if (executable.has_value()) {
+            TERMCOLOR::cprintln(trctx.usage_title, TERMCOLOR::Color::Yellow, TERMCOLOR::Color::Default, TERMCOLOR::Attribute::Default, dst);
+            dst << INDENT << FORMAT::format(trctx.usage_body, executable.value()) << std::endl;
+        }
 
         const auto &variables = app.get_variables();
         if (!variables.empty()) {

src/yycc/carton/clap/summary.cpp

@@ -3,11 +3,9 @@
 namespace yycc::carton::clap::summary {
 
     Summary::Summary(const std::u8string_view &name,
-                     const std::u8string_view &bin_name,
                      const std::u8string_view &author,
                      const std::u8string_view &version,
-                     const std::u8string_view &description) :
+                     const std::u8string_view &description) : name(name), author(author), version(version), description(description) {}
-        name(name), bin_name(bin_name), author(author), version(version), description(description) {}
 
     Summary::~Summary() {}
 
@@ -15,10 +13,6 @@ namespace yycc::carton::clap::summary {
         return this->name;
     }
 
-    std::u8string_view Summary::get_bin_name() const {
-        return this->bin_name;
-    }
-
     std::u8string_view Summary::get_author() const {
         return this->author;
     }

src/yycc/carton/clap/summary.hpp

@@ -4,11 +4,10 @@
 #include <string_view>
 
 namespace yycc::carton::clap::summary {
-    
+
     class Summary {
     public:
         Summary(const std::u8string_view& name,
-                const std::u8string_view& bin_name,
                 const std::u8string_view& author,
                 const std::u8string_view& version,
                 const std::u8string_view& description);
@@ -17,13 +16,12 @@ namespace yycc::carton::clap::summary {
 
     public:
         std::u8string_view get_name() const;
-        std::u8string_view get_bin_name() const;
         std::u8string_view get_author() const;
         std::u8string_view get_version() const;
         std::u8string_view get_description() const;
 
     private:
-        std::u8string name, bin_name, author, version, description;
+        std::u8string name, author, version, description;
     };
 
-}
+} // namespace yycc::carton::clap::summary