basename: Take in parameters as OSString

This will allow us to handle non-Unicode strings correctly.

The logic needs to be updated, next.

Author: drinkcat

src/uu/basename/src/basename.rs

@@ -5,8 +5,10 @@
 
 // spell-checker:ignore (ToDO) fullname
 
+use clap::builder::ValueParser;
 use clap::{Arg, ArgAction, Command};
 use std::collections::HashMap;
+use std::ffi::OsString;
 use std::path::PathBuf;
 use uucore::display::Quotable;
 use uucore::error::{UResult, UUsageError};
@@ -24,8 +26,6 @@ pub mod options {
 
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
-    let args = args.collect_lossy();
-
     //
     // Argument parsing
     //
@@ -34,7 +34,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let line_ending = LineEnding::from_zero_flag(matches.get_flag(options::ZERO));
 
     let mut name_args = matches
-        .get_many::<String>(options::NAME)
+        .get_many::<OsString>(options::NAME)
         .unwrap_or_default()
         .collect::<Vec<_>>();
     if name_args.is_empty() {
@@ -43,18 +43,18 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
             get_message("basename-error-missing-operand"),
         ));
     }
-    let multiple_paths =
-        matches.get_one::<String>(options::SUFFIX).is_some() || matches.get_flag(options::MULTIPLE);
+    let multiple_paths = matches.get_one::<OsString>(options::SUFFIX).is_some()
+        || matches.get_flag(options::MULTIPLE);
     let suffix = if multiple_paths {
         matches
-            .get_one::<String>(options::SUFFIX)
+            .get_one::<OsString>(options::SUFFIX)
             .cloned()
             .unwrap_or_default()
     } else {
         // "simple format"
         match name_args.len() {
             0 => panic!("already checked"),
-            1 => String::default(),
+            1 => OsString::default(),
             2 => name_args.pop().unwrap().clone(),
             _ => {
                 return Err(UUsageError::new(
@@ -96,6 +96,7 @@ pub fn uu_app() -> Command {
         .arg(
             Arg::new(options::NAME)
                 .action(ArgAction::Append)
+                .value_parser(ValueParser::os_string())
                 .value_hint(clap::ValueHint::AnyPath)
                 .hide(true)
                 .trailing_var_arg(true),
@@ -105,6 +106,7 @@ pub fn uu_app() -> Command {
                 .short('s')
                 .long(options::SUFFIX)
                 .value_name("SUFFIX")
+                .value_parser(ValueParser::os_string())
                 .help(get_message("basename-help-suffix"))
                 .overrides_with(options::SUFFIX),
         )
@@ -118,13 +120,16 @@ pub fn uu_app() -> Command {
         )
 }
 
-fn basename(fullname: &str, suffix: &str) -> String {
+fn basename(fullname: &OsString, suffix: &OsString) -> String {
+    // TODO: Remove those 2 lines.
+    let fullname = &fullname.to_string_lossy().to_string();
+    let suffix = &suffix.to_string_lossy().to_string();
+
     // Handle special case where path ends with /.
     if fullname.ends_with("/.") {
         return ".".to_string();
     }
 
-    // Convert to path buffer and get last path component
     let pb = PathBuf::from(fullname);
 
     pb.components().next_back().map_or_else(String::new, |c| {