CLI help command

Cargo.lock

@@ -2,6 +2,91 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "colored"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbf2150cce219b664a8a70df7a1f933836724b503f8a413af9365b4dcc4d90b8"
+dependencies = [
+ "lazy_static",
+ "windows-sys",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "thp"
 version = "0.0.9"
+dependencies = [
+ "colored",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+colored = "2.1.0"

src/cli/help.rs

@@ -1,7 +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

@@ -1,30 +1,38 @@
 mod help;
 mod types;
+mod empty;
 
 use types::{Command, CommandType};
 
-pub const HELP_TEXT: &str = r#"
+use colored::*;
+
+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
+  r         Starts the REPL
 
-  init		Initializes a new project in the current directory
+  init      Initializes a new project in the current directory
-  build		Builds the project
+  build     Builds the project
-  fmt		Formats all files in the project
+  fmt       Formats all files in the project
-  watch, w	Starts compilation of the project in watch mode
+  watch, w  Starts compilation of the project in watch mode
 
-  help, h	Print this message & exit
+  help, h   Print this message & exit
 
 General options
 
-    -h, --help	Print command-specific usage
+  -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)
 }
@@ -33,10 +41,10 @@ pub fn run_cli() {
     let command = match parse_args() {
         Ok(c) => c,
         Err(reason) => {
-            println!("{}", HELP_TEXT);
+            println!("{}", get_help_text());
-            println!("Error: {}", reason);
+            println!("{}: {}", "error".on_red(), reason);
             return;
-        },
+        }
     };
 
     command.run();
@@ -58,10 +66,7 @@ fn parse_args() -> Result<Command, String> {
         if arg.starts_with('-') {
             options.push(arg);
         } else {
-            return Err(format!(
+            return Err(format!("Unexpected command `{}` after the options", arg));
-                "Unexpected command `{}` after the options",
-                arg
-            ));
         }
     }
 
@@ -75,12 +80,10 @@ fn parse_args() -> Result<Command, String> {
             "fmt" => CommandType::Fmt,
             "watch" | "w" => CommandType::Watch,
             "help" | "h" => CommandType::Help,
-            _ => return Err(format!("Unknown command: {}", command)),
+            _ => return Err(format!("Unknown command `{}`", command)),
         },
         None => CommandType::None,
     };
 
     Ok(Command { command, options })
 }
-
-

src/cli/types.rs

@@ -17,16 +17,19 @@ pub enum CommandType {
     None,
 }
 
-
 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);
+            }
+        }
     }
 }