updated build system script commands (#490)

updated build system script commands

build_system/src/build.rs

@@ -14,9 +14,10 @@ struct BuildArg {
 }
 
 impl BuildArg {
+    /// Creates a new `BuildArg` instance by parsing command-line arguments.
     fn new() -> Result<Option<Self>, String> {
         let mut build_arg = Self::default();
-        // We skip binary name and the `build` command.
+        // Skip binary name and the `build` command.
         let mut args = std::env::args().skip(2);
 
         while let Some(arg) = args.next() {
@@ -211,6 +212,7 @@ fn build_codegen(args: &mut BuildArg) -> Result<(), String> {
     Ok(())
 }
 
+/// Executes the build process.
 pub fn run() -> Result<(), String> {
     let mut args = match BuildArg::new()? {
         Some(args) => args,

build_system/src/main.rs

@@ -26,17 +26,22 @@ macro_rules! arg_error {
 fn usage() {
     println!(
         "\
-Available commands for build_system:
+rustc_codegen_gcc build system
 
-    cargo     : Run cargo command
+Usage: build_system [command] [options]
-    rustc     : Run rustc command
+
-    clean     : Run clean command
+Options:
-    prepare   : Run prepare command
+        --help    : Displays this help message.
-    build     : Run build command
+
-    test      : Run test command
+Commands:
-    info      : Run info command
+        cargo     : Executes a cargo command. 
-    clone-gcc : Run clone-gcc command
+        rustc     : Compiles the program using the GCC compiler.
-    --help    : Show this message"
+        clean     : Cleans the build directory, removing all compiled files and artifacts.
+        prepare   : Prepares the environment for building, including fetching dependencies and setting up configurations.
+        build     : Compiles the project. 
+        test      : Runs tests for the project.
+        info      : Displays information about the build environment and project configuration.
+        clone-gcc : Clones the GCC compiler from a specified source."
     );
 }