Added basename applet

src/cmd/basename/mod.rs

@@ -0,0 +1,67 @@
+use super::Cmd;
+use clap::{Arg, ArgMatches, Command};
+use std::io;
+
+#[derive(Debug)]
+pub struct Basename {
+    name: &'static str,
+    path: Option<crate::Path>,
+}
+
+impl Default for Basename {
+    fn default() -> Self {
+        Self {
+            name: "basename",
+            path: Some(crate::Path::UsrBin),
+        }
+    }
+}
+
+impl Cmd for Basename {
+    fn name(&self) -> &str {
+        self.name
+    }
+
+    fn cli(&self) -> clap::Command {
+        Command::new(self.name)
+            .about("Print NAME with any leading directory components removed.")
+            .long_about(
+                "Print NAME with any leading directory components removed.\n\
+                If specified, also remove a trailing SUFFIX.",
+            )
+            .author("Nathan Fisher")
+            .args([
+                Arg::new("NAME")
+                    .index(1)
+                    .required(true)
+                    .help("the filename to process"),
+                Arg::new("SUFFIX")
+                    .index(2)
+                    .required(false)
+                    .help("the suffix to be removed"),
+            ])
+    }
+
+    fn run(&self, matches: Option<&ArgMatches>) -> Result<(), Box<dyn std::error::Error>> {
+        let Some(matches) = matches else {
+            return Err(Box::new(io::Error::new(io::ErrorKind::Other, "no input")));
+        };
+        if let Some(mut base) = matches
+            .get_one::<String>("NAME")
+            .and_then(|x| x.split('/').last())
+        {
+            if let Some(suffix) = matches.get_one::<String>("SUFFIX") {
+                base = match base.strip_suffix(suffix) {
+                    Some(b) => b,
+                    None => base,
+                };
+            }
+            println!("{base}");
+        }
+        Ok(())
+    }
+
+    fn path(&self) -> Option<crate::Path> {
+        self.path
+    }
+}

src/cmd/mod.rs

@@ -3,6 +3,7 @@ use std::{error::Error, fmt};
 
 pub mod base32;
 pub mod base64;
+pub mod basename;
 pub mod bootstrap;
 mod cat;
 mod chmod;
@@ -33,10 +34,10 @@ pub mod r#true;
 pub mod yes;
 
 pub use {
-    self::hostname::Hostname, base32::Base32, base64::Base64, bootstrap::Bootstrap,
-    dirname::Dirname, echo::Echo, factor::Factor, head::Head, mountpoint::Mountpoint,
-    nologin::Nologin, nproc::Nproc, r#false::False, r#true::True, rev::Rev, shitbox::Shitbox, sleep::Sleep,
-    yes::Yes,
+    self::hostname::Hostname, base32::Base32, base64::Base64, basename::Basename,
+    bootstrap::Bootstrap, dirname::Dirname, echo::Echo, factor::Factor, head::Head,
+    mountpoint::Mountpoint, nologin::Nologin, nproc::Nproc, r#false::False, r#true::True, rev::Rev,
+    shitbox::Shitbox, sleep::Sleep, yes::Yes,
 };
 
 pub trait Cmd: fmt::Debug + Sync {
@@ -50,6 +51,7 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
     match name {
         "base64" => Some(Box::new(Base64::default())),
         "base32" => Some(Box::new(Base32::default())),
+        "basename" => Some(Box::new(Basename::default())),
         "bootstrap" => Some(Box::new(Bootstrap::default())),
         "dirname" => Some(Box::new(Dirname::default())),
         "echo" => Some(Box::new(Echo::default())),
@@ -68,9 +70,10 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
     }
 }
 
-pub static COMMANDS: [&'static str; 17] = [
+pub static COMMANDS: [&'static str; 18] = [
     "base32",
     "base64",
+    "basename",
     "bootstrap",
     "dirname",
     "echo",

src/cmd/nproc/mod.rs

@@ -1,6 +1,6 @@
-use clap::{Arg, Command, ArgAction};
-use std::io;
 use super::Cmd;
+use clap::{Arg, ArgAction, Command};
+use std::io;
 
 #[derive(Debug)]
 pub struct Nproc {