improve argument parsing and documentaion & generate screen into exis…

…ting feature

.gitignore

@@ -1 +1,2 @@
 /target
+/test

Cargo.toml

@@ -9,3 +9,4 @@ edition = "2021"
 handlebars = "4.3.6"
 convert_case = "0.6.0"
 serde = "1.0.160"
+clap = { version = "4.2.5", features = ["derive"] }

src/args_parser.rs

@@ -0,0 +1,51 @@
+use clap::{Parser, Subcommand};
+
+#[derive(Parser)]
+#[command(name = "Feature Generator")]
+#[command(author = "Aradi Patrik <[email protected]>")]
+#[command(version = "1.0")]
+#[command(about = "Generates new features and screens inside them", long_about = None)]
+pub struct Cli {
+    /// Turn debugging on
+    #[arg(short, long, action = clap::ArgAction::SetTrue)]
+    pub debug: bool,
+
+    /// base package name
+    #[arg(short, long)]
+    pub base_package: String,
+
+    /// Application name
+    #[arg(short, long)]
+    pub app_name: String,
+
+    #[command(subcommand)]
+    pub command: Commands,
+}
+
+#[derive(Subcommand)]
+pub enum Commands {
+    /// Generates new feature module
+    GenMod {
+        /// The name of the new feature
+        #[arg(short, long)]
+        feature: String,
+
+        /// The name of the starting screen
+        #[arg(short, long)]
+        start_screen: String
+    },
+    /// Generates new screen for a feature module
+    GenScreen {
+        /// The name of the existing feature
+        #[arg(short, long)]
+        feature: String,
+
+        /// The name of the new screen
+        #[arg(short, long)]
+        screen: String
+    }
+}
+
+pub fn parse_args() -> Cli {
+    return Cli::parse()
+}