version and help

src/help.rs

@@ -0,0 +1,44 @@
+use crate::args::HazeCommand;
+use owo_colors::colors::xterm::Gray;
+use owo_colors::OwoColorize;
+use strum::{EnumMessage, IntoEnumIterator};
+
+pub fn help() {
+    println!(
+        "{} {} {}",
+        "Usage:".bright_yellow().bold(),
+        "haze".blue(),
+        "[filter] <COMMAND> [arguments]".green()
+    );
+    println!();
+    println!("{}", "Commands:".yellow().bold());
+    let max_command_len = HazeCommand::iter()
+        .map(|command| <&'static str>::from(command).len())
+        .max()
+        .unwrap();
+    let max_doc_len = HazeCommand::iter()
+        .map(|command| command.get_documentation().unwrap_or_default().len())
+        .max()
+        .unwrap();
+
+    for command in HazeCommand::iter() {
+        let command: HazeCommand = command;
+        let command_str = <&'static str>::from(command);
+        let mut len = command_str.len();
+        if command_str.starts_with("--") {
+            len -= 2;
+        }
+        println!(
+            "  {}{}  {}{} {}",
+            command.blue(),
+            " ".repeat(max_command_len - len),
+            command.get_documentation().unwrap_or_default(),
+            " ".repeat(max_doc_len - command.get_documentation().unwrap_or_default().len()),
+            if command.allows_filter() {
+                "- supports filter".fg::<Gray>()
+            } else {
+                "".fg::<Gray>()
+            },
+        );
+    }
+}