Add hformat_cargo, hprintln_cargo macros and help rendering

1 files changed, 34 insertions, 9 deletions

diff --git a/mling/src/lib.rs b/mling/src/lib.rs
index d4ce697..add20ac 100644
--- a/mling/src/lib.rs
+++ b/mling/src/lib.rs
@@ -1,32 +1,57 @@
 #![allow(unused_imports)]
 
+use colored::Colorize;
 use mingling::{
-    macros::{gen_program, r_println, renderer},
+    macros::{chain, gen_program, pack, r_println, renderer},
     res::ResExitCode,
 };
 
 pub mod cli;
+pub use cli::*;
 
 mod cargo_style;
 pub use cargo_style::*;
 pub mod display;
 pub mod res;
 
+mod pkg_mgr;
+pub use pkg_mgr::*;
+
 mod proj_mgr;
-use proj_mgr::*;
+pub use proj_mgr::*;
 
 use crate::display::markdown;
 
-#[renderer]
-pub fn render_error_dispatch_not_found(err: ErrorDispatcherNotFound, ec: &mut ResExitCode) {
+pack!(ResultMlingHelp = ());
+pack!(ResultUnknownCommand = String);
+
+#[chain]
+fn handle_error_dispatcher_not_found(err: ErrorDispatcherNotFound) -> Next {
     if err.is_empty() {
-        r_println!("{}", markdown(include_str!("helps/mling_help.txt")));
-        ec.exit_code = 0;
+        ResultMlingHelp::default().to_render()
     } else {
-        let s = eformat_cargo!("Cannot find subcommand \"{}\"", err.join(" "));
-        r_println!("{}", s);
-        ec.exit_code = 1;
+        ResultUnknownCommand::new(err.join(" ")).to_render()
     }
 }
 
+#[renderer]
+fn render_mling_help(_prev: ResultMlingHelp, ec: &mut ResExitCode) {
+    r_println!("{}", markdown(include_str!("helps/mling_help.txt")));
+    ec.exit_code = 0;
+}
+
+#[renderer]
+fn render_unknown_command(prev: ResultUnknownCommand, ec: &mut ResExitCode) {
+    r_println!(
+        "{}",
+        eformat_cargo!("no such command: `{}`", prev.bright_yellow().bold())
+    );
+    r_println!();
+    r_println!(
+        "{}",
+        hformat_cargo!("view all commands with `cargo help mling`")
+    );
+    ec.exit_code = 101;
+}
+
 gen_program!();