sort: move to thiserror

src/uu/sort/Cargo.toml

@@ -28,6 +28,7 @@ rand = { workspace = true }
 rayon = { workspace = true }
 self_cell = { workspace = true }
 tempfile = { workspace = true }
+thiserror = { workspace = true }
 unicode-width = { workspace = true }
 uucore = { workspace = true, features = ["fs", "version-cmp"] }
 

src/uu/sort/src/sort.rs

@@ -30,9 +30,7 @@ use rand::{thread_rng, Rng};
 use rayon::prelude::*;
 use std::cmp::Ordering;
 use std::env;
-use std::error::Error;
 use std::ffi::{OsStr, OsString};
-use std::fmt::Display;
 use std::fs::{File, OpenOptions};
 use std::hash::{Hash, Hasher};
 use std::io::{stdin, stdout, BufRead, BufReader, BufWriter, Read, Write};
@@ -40,9 +38,11 @@ use std::ops::Range;
 use std::path::Path;
 use std::path::PathBuf;
 use std::str::Utf8Error;
+use thiserror::Error;
 use unicode_width::UnicodeWidthStr;
 use uucore::display::Quotable;
-use uucore::error::{set_exit_code, strip_errno, UError, UResult, USimpleError, UUsageError};
+use uucore::error::strip_errno;
+use uucore::error::{set_exit_code, UError, UResult, USimpleError, UUsageError};
 use uucore::line_ending::LineEnding;
 use uucore::parse_size::{ParseSizeError, Parser};
 use uucore::shortcut_value_parser::ShortcutValueParser;
@@ -119,44 +119,43 @@ const POSITIVE: char = '+';
 // available memory into consideration, instead of relying on this constant only.
 const DEFAULT_BUF_SIZE: usize = 1_000_000_000; // 1 GB
 
-#[derive(Debug)]
-enum SortError {
+#[derive(Debug, Error)]
+pub enum SortError {
+    #[error("{}", format_disorder(.file, .line_number, .line, .silent))]
     Disorder {
         file: OsString,
         line_number: usize,
         line: String,
         silent: bool,
     },
-    OpenFailed {
-        path: String,
-        error: std::io::Error,
-    },
+
+    #[error("open failed: {}: {}", .path.maybe_quote(), strip_errno(.error))]
+    OpenFailed { path: String, error: std::io::Error },
+
+    #[error("failed to parse key {}: {}", .key.quote(), .msg)]
+    ParseKeyError { key: String, msg: String },
+
+    #[error("cannot read: {}: {}", .path.maybe_quote(), strip_errno(.error))]
     ReadFailed {
         path: PathBuf,
         error: std::io::Error,
     },
-    ParseKeyError {
-        key: String,
-        msg: String,
-    },
-    OpenTmpFileFailed {
-        error: std::io::Error,
-    },
-    CompressProgExecutionFailed {
-        code: i32,
-    },
-    CompressProgTerminatedAbnormally {
-        prog: String,
-    },
-    TmpFileCreationFailed {
-        path: PathBuf,
-    },
-    Uft8Error {
-        error: Utf8Error,
-    },
-}
 
-impl Error for SortError {}
+    #[error("failed to open temporary file: {}", strip_errno(.error))]
+    OpenTmpFileFailed { error: std::io::Error },
+
+    #[error("couldn't execute compress program: errno {code}")]
+    CompressProgExecutionFailed { code: i32 },
+
+    #[error("{} terminated abnormally", .prog.quote())]
+    CompressProgTerminatedAbnormally { prog: String },
+
+    #[error("cannot create temporary file in '{}':", .path.display())]
+    TmpFileCreationFailed { path: PathBuf },
+
+    #[error("{error}")]
+    Uft8Error { error: Utf8Error },
+}
 
 impl UError for SortError {
     fn code(&self) -> i32 {
@@ -167,60 +166,11 @@ impl UError for SortError {
     }
 }
 
-impl Display for SortError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Disorder {
-                file,
-                line_number,
-                line,
-                silent,
-            } => {
-                if *silent {
-                    Ok(())
-                } else {
-                    write!(
-                        f,
-                        "{}:{}: disorder: {}",
-                        file.maybe_quote(),
-                        line_number,
-                        line
-                    )
-                }
-            }
-            Self::OpenFailed { path, error } => {
-                write!(
-                    f,
-                    "open failed: {}: {}",
-                    path.maybe_quote(),
-                    strip_errno(error)
-                )
-            }
-            Self::ParseKeyError { key, msg } => {
-                write!(f, "failed to parse key {}: {}", key.quote(), msg)
-            }
-            Self::ReadFailed { path, error } => {
-                write!(
-                    f,
-                    "cannot read: {}: {}",
-                    path.maybe_quote(),
-                    strip_errno(error)
-                )
-            }
-            Self::OpenTmpFileFailed { error } => {
-                write!(f, "failed to open temporary file: {}", strip_errno(error))
-            }
-            Self::CompressProgExecutionFailed { code } => {
-                write!(f, "couldn't execute compress program: errno {code}")
-            }
-            Self::CompressProgTerminatedAbnormally { prog } => {
-                write!(f, "{} terminated abnormally", prog.quote())
-            }
-            Self::TmpFileCreationFailed { path } => {
-                write!(f, "cannot create temporary file in '{}':", path.display())
-            }
-            Self::Uft8Error { error } => write!(f, "{error}"),
-        }
+fn format_disorder(file: &OsString, line_number: &usize, line: &String, silent: &bool) -> String {
+    if *silent {
+        String::new()
+    } else {
+        format!("{}:{}: disorder: {}", file.maybe_quote(), line_number, line)
     }
 }