CLI help command

src/cli/help.rs

@@ -1,5 +1,10 @@
-use crate::cli::HELP_TEXT;
+use crate::cli::get_help_text;
+use colored::*;
 
 pub fn help_command(options: &Vec<String>) {
-    println!("{}", HELP_TEXT);
+    println!("{}", get_help_text());
+
+    if options.len() > 0 {
+        println!("{}: {}", "warning".yellow(), "The help command doesn't take any options.");
+    }
 }

src/cli/mod.rs

@@ -1,17 +1,20 @@
 mod help;
 mod types;
+mod empty;
 
 use types::{Command, CommandType};
 
 use colored::*;
 
-pub const HELP_TEXT: &str = r#"
+pub fn get_help_text() -> String {
+    format!(
+        r#"
 Usage: `thp [command] [options]`
 
 Commands
 
-  c _file_  Compiles `file` in-place
+  c {0}  Compiles {0} in-place
-  f _file_  Formats `file`
+  f {0}  Formats {0}
   r         Starts the REPL
 
   init      Initializes a new project in the current directory
@@ -24,9 +27,12 @@ Commands
 General options
 
   -h, --help    Print command-specific usage
-"#;
+"#,
+        "_file_".green()
+    )
+}
 
-fn get_copyright() -> String {
+fn get_version() -> String {
     let crate_version = env!("CARGO_PKG_VERSION");
     format!("The THP compiler, linter & formatter, v{}", crate_version)
 }
@@ -35,8 +41,8 @@ pub fn run_cli() {
     let command = match parse_args() {
         Ok(c) => c,
         Err(reason) => {
-            println!("{}", HELP_TEXT);
+            println!("{}", get_help_text());
-            println!("{}: {}", "error".red(), reason);
+            println!("{}: {}", "error".on_red(), reason);
             return;
         }
     };

src/cli/types.rs

@@ -19,13 +19,17 @@ pub enum CommandType {
 
 impl Command {
     pub fn run(&self) {
-        println!("Running command! {:?}", self);
         self.command.run(&self.options);
     }
 }
 
 impl CommandType {
     pub fn run(&self, options: &Vec<String>) {
-        println!("Running command! {:?}", self)
+        match self {
+            CommandType::Help => super::help::help_command(options),
+            _ => {
+                println!("Not implemented yet! {:?} {:?}", self, options);
+            }
+        }
     }
 }