Add readlink
applet
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parent
7630e016c9
commit
9a7af682b7
@ -45,6 +45,7 @@ code between applets, making for an overall smaller binary.
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- printenv
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- pwd
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- readlink
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- realpath
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- rev
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- rm
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- rmdir
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@ -35,6 +35,7 @@ mod nologin;
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mod nproc;
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mod printenv;
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mod pwd;
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mod readlink;
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mod realpath;
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mod rev;
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mod rm;
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@ -93,6 +94,7 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
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"nproc" => Some(Box::new(nproc::Nproc::default())),
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"printenv" => Some(Box::new(printenv::Printenv::default())),
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"pwd" => Some(Box::new(pwd::Pwd::default())),
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"readlink" => Some(Box::new(readlink::Readlink::default())),
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"realpath" => Some(Box::new(realpath::Realpath::default())),
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"rev" => Some(Box::new(rev::Rev::default())),
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"rm" => Some(Box::new(rm::Rm::default())),
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@ -109,7 +111,7 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
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}
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}
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pub static COMMANDS: [&str; 39] = [
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pub static COMMANDS: [&str; 40] = [
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"base32",
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"base64",
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"basename",
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@ -137,6 +139,7 @@ pub static COMMANDS: [&str; 39] = [
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"nproc",
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"printenv",
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"pwd",
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"readlink",
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"realpath",
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"rev",
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"rm",
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62
src/cmd/readlink/mod.rs
Normal file
62
src/cmd/readlink/mod.rs
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@ -0,0 +1,62 @@
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use crate::Cmd;
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use clap::{Arg, ArgAction, ArgMatches, Command, ValueHint};
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use std::{fs, io, path::PathBuf};
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#[derive(Debug, Default)]
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pub struct Readlink;
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impl Cmd for Readlink {
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fn cli(&self) -> clap::Command {
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Command::new("readlink")
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.about("Print symbolic link target or canonical file name")
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.version(env!("CARGO_PKG_VERSION"))
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.author("Nathan Fisher")
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.args([
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Arg::new("path")
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.value_name("PATH")
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.value_hint(ValueHint::AnyPath)
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.num_args(1..)
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.required(true),
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Arg::new("canon")
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.help("Canonicalize path")
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.short('f')
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.visible_short_alias('c')
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.long("canonicalize")
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.action(ArgAction::SetTrue),
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Arg::new("newline")
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.help("Do not print the terminating newline.")
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.short('n')
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.long("no-newline")
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.action(ArgAction::SetTrue),
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])
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}
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fn run(&self, matches: Option<&ArgMatches>) -> Result<(), Box<dyn std::error::Error>> {
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let Some(matches) = matches else {
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return Err(io::Error::new(io::ErrorKind::Other, "no input").into());
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};
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if let Some(paths) = matches.get_many::<String>("path") {
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let paths: Vec<_> = paths.collect();
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let len = paths.len();
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if matches.get_flag("newline") && len > 1 {
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eprintln!("readlink: ignoring --no-newline with multiple arguments");
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}
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for p in paths {
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let path = if matches.get_flag("canon") {
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PathBuf::from(p).canonicalize()?
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} else {
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fs::read_link(p)?
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};
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print!("{}", path.display());
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if !matches.get_flag("newline") || len > 1 {
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println!();
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}
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}
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}
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Ok(())
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}
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fn path(&self) -> Option<crate::Path> {
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Some(crate::Path::UsrBin)
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}
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}
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