fix clippy (#10659)

This pr fix clippy warnings in latest clippy version(1.72.0):

Unfortunally it's not easy to handle for [try
fold](https://rust-lang.github.io/rust-clippy/master/index.html#/manual_try_fold)
warning in `start command`

Refer to known issue:
> This lint doesn’t take into account whether a function does something
on the failure case, i.e., whether short-circuiting will affect
behavior. Refactoring to try_fold is not desirable in those cases.

That's the case for our code, which does something on the failure case.

So this pr is making a little refactor on `try_commands`.

crates/nu-command/src/date/parser.rs

@@ -98,7 +98,7 @@ fn timezone_offset_internal(
     };
     match s.len() {
         len if len >= 2 => &s[2..],
-        len if len == 0 => s,
+        0 => s,
         _ => return Err(ParseErrorKind::TooShort),
     };
 

crates/nu-command/src/debug/explain.rs

@@ -90,7 +90,6 @@ pub fn get_pipeline_elements(
             let value_span = value.span();
             let value_span_start = value_span.start as i64;
             let value_span_end = value_span.end as i64;
-            let command_name = command_name;
 
             let record = record! {
                     "cmd_index" => Value::string(index, span),

crates/nu-command/src/filesystem/ls.rs

@@ -158,8 +158,10 @@ impl Command for Ls {
         let glob_options = if all {
             None
         } else {
-            let mut glob_options = MatchOptions::new();
-            glob_options.recursive_match_hidden_dir = false;
+            let glob_options = MatchOptions {
+                recursive_match_hidden_dir: false,
+                ..Default::default()
+            };
             Some(glob_options)
         };
         let (prefix, paths) = nu_engine::glob_from(&glob_path, &cwd, call_span, glob_options)?;

crates/nu-command/src/filesystem/start.rs

@@ -151,9 +151,7 @@ fn try_commands(
     span: Span,
 ) -> Result<(), ShellError> {
     let env_vars_str = env_to_strings(engine_state, stack)?;
-    commands
-        .into_iter()
-        .map(|mut cmd| {
+    let cmd_run_result = commands.into_iter().map(|mut cmd| {
         let status = cmd
             .envs(&env_vars_str)
             .stdin(Stdio::null())
@@ -173,18 +171,18 @@ fn try_commands(
                 err
             )),
         }
-        })
-        .take_while_inclusive(|result| result.is_err())
-        .fold(Err("".to_string()), |combined_result, next_result| {
-            combined_result.or_else(|combined_message| {
-                next_result.map_err(|next_message| combined_message + &next_message)
-            })
-        })
-        .map_err(|message| ShellError::ExternalCommand {
+    });
+
+    for one_result in cmd_run_result {
+        if let Err(err_msg) = one_result {
+            return Err(ShellError::ExternalCommand {
                 label: "No command found to start with this path".to_string(),
-            help: "Try different path or install appropriate command\n".to_string() + &message,
+                help: "Try different path or install appropriate command\n".to_string() + &err_msg,
                 span,
-        })
+            });
+        }
+    }
+    Ok(())
 }
 
 fn format_command(command: &std::process::Command) -> String {

crates/nu-command/src/strings/detect_columns.rs

@@ -232,7 +232,7 @@ fn detect_columns(
                 .iter()
                 .take(end_index)
                 .skip(start_index)
-                .map(|v| v.as_string().unwrap_or(String::default()))
+                .map(|v| v.as_string().unwrap_or_default())
                 .join(" ");
             let binding = Value::string(combined, Span::unknown());
             let last_seg = vals.split_off(end_index);

crates/nu-command/src/strings/encode_decode/base64.rs

@@ -107,8 +107,7 @@ fn action(
         Value::Error { .. } => input.clone(),
         Value::Binary { val, .. } => match base64_config.action_type {
             ActionType::Encode => {
-                let mut enc_vec = Vec::new();
-                enc_vec.resize(val.len() * 4 / 3 + 4, 0);
+                let mut enc_vec = vec![0; val.len() * 4 / 3 + 4];
                 let bytes_written = match base64_engine.encode_slice(val, &mut enc_vec) {
                     Ok(bytes_written) => bytes_written,
                     Err(err) => {

crates/nu-command/tests/commands/glob.rs

@@ -133,7 +133,7 @@ pub fn create_file_at(full_path: impl AsRef<Path>) -> Result<(), std::io::Error>
 #[rstest]
 #[case(".", r#"'*z'"#, &["ablez", "baker", "charliez"], &["ablez", "charliez"], "simple glob")]
 #[case(".", r#"'qqq'"#, &["ablez", "baker", "charliez"], &[], "glob matches none")]
-#[case("foo/bar", r#"'*[\]}]*'"#, &[r#"foo/bar/ab}le"#, "foo/bar/baker", r#"foo/bar/cha]rlie"#], &[r#"foo/bar/ab}le"#, r#"foo/bar/cha]rlie"#], "glob has quoted metachars")]
+#[case("foo/bar", r"'*[\]}]*'", &[r#"foo/bar/ab}le"#, "foo/bar/baker", r#"foo/bar/cha]rlie"#], &[r#"foo/bar/ab}le"#, r#"foo/bar/cha]rlie"#], "glob has quoted metachars")]
 #[case("foo/bar", r#"'../*'"#, &["foo/able", "foo/bar/baker", "foo/charlie"], &["foo/able", "foo/bar", "foo/charlie"], "glob matches files in parent")]
 #[case("foo", r#"'./{a,b}*'"#, &["foo/able", "foo/bar/baker", "foo/charlie"], &["foo/able", "foo/bar"], "glob with leading ./ matches peer files")]
 fn glob_files_in_parent(

crates/nu-engine/src/glob_from.rs

@@ -82,7 +82,7 @@ pub fn glob_from(
     };
 
     let pattern = pattern.to_string_lossy().to_string();
-    let glob_options = options.unwrap_or_else(MatchOptions::new);
+    let glob_options = options.unwrap_or_default();
 
     let glob = nu_glob::glob_with(&pattern, glob_options).map_err(|err| {
         nu_protocol::ShellError::GenericError(

crates/nu-glob/src/lib.rs

@@ -161,7 +161,7 @@ pub struct Paths {
 /// ```
 /// Paths are yielded in alphabetical order.
 pub fn glob(pattern: &str) -> Result<Paths, PatternError> {
-    glob_with(pattern, MatchOptions::new())
+    glob_with(pattern, MatchOptions::default())
 }
 
 /// Return an iterator that produces all the `Path`s that match the given
@@ -716,7 +716,7 @@ impl Pattern {
     /// assert!(Pattern::new("d*g").unwrap().matches("doog"));
     /// ```
     pub fn matches(&self, str: &str) -> bool {
-        self.matches_with(str, MatchOptions::new())
+        self.matches_with(str, MatchOptions::default())
     }
 
     /// Return if the given `Path`, when converted to a `str`, matches this
@@ -1020,7 +1020,7 @@ fn chars_eq(a: char, b: char, case_sensitive: bool) -> bool {
 
 /// Configuration options to modify the behaviour of `Pattern::matches_with(..)`.
 #[allow(missing_copy_implementations)]
-#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct MatchOptions {
     /// Whether or not patterns should be matched in a case-sensitive manner.
     /// This currently only considers upper/lower case relationships between
@@ -1045,27 +1045,9 @@ pub struct MatchOptions {
     pub recursive_match_hidden_dir: bool,
 }
 
-impl MatchOptions {
-    /// Constructs a new `MatchOptions` with default field values. This is used
-    /// when calling functions that do not take an explicit `MatchOptions`
-    /// parameter.
-    ///
-    /// This function always returns this value:
-    ///
-    /// ```rust,ignore
-    /// MatchOptions {
-    ///     case_sensitive: true,
-    ///     require_literal_separator: false,
-    ///     require_literal_leading_dot: false
-    ///     recursive_match_hidden_dir: true,
-    /// }
-    /// ```
-    ///
-    /// # Note
-    /// The behavior of this method doesn't match `default()`'s. This returns
-    /// `case_sensitive` as `true` while `default()` does it as `false`.
-    // FIXME: Consider unity the behavior with `default()` in a next major release.
-    pub fn new() -> Self {
+// Overwrite default behavior, because we want to make `recursive_match_hidden_dir` to true.
+impl Default for MatchOptions {
+    fn default() -> Self {
         Self {
             case_sensitive: true,
             require_literal_separator: false,
@@ -1274,7 +1256,7 @@ mod test {
             for c in "ABCDEFGHIJKLMNOPQRSTUVWXYZ".chars() {
                 let options = MatchOptions {
                     case_sensitive: false,
-                    ..MatchOptions::new()
+                    ..MatchOptions::default()
                 };
                 assert!(pat.matches_with(&c.to_string(), options));
             }

crates/nu-system/src/macos.rs

@@ -9,7 +9,6 @@ use libproc::libproc::thread_info::ThreadInfo;
 use libproc::processes::{pids_by_type, ProcFilter};
 use mach2::mach_time;
 use std::cmp;
-use std::ffi::OsStr;
 use std::path::{Path, PathBuf};
 use std::thread;
 use std::time::{Duration, Instant};
@@ -186,7 +185,7 @@ fn get_path_info(pid: i32, mut size: size_t) -> Option<PathInfo> {
                 let exe = Path::new(get_unchecked_str(cp, start).as_str()).to_path_buf();
                 let name = exe
                     .file_name()
-                    .unwrap_or_else(|| OsStr::new(""))
+                    .unwrap_or_default()
                     .to_str()
                     .unwrap_or("")
                     .to_owned();
@@ -406,7 +405,7 @@ impl ProcessInfo {
         self.curr_path
             .as_ref()
             .map(|cur_path| cur_path.cwd.display().to_string())
-            .unwrap_or_else(|| "".to_string())
+            .unwrap_or_default()
     }
 }
 

crates/nu-test-support/src/fs.rs

@@ -233,7 +233,7 @@ pub fn root() -> PathBuf {
 }
 
 pub fn binaries() -> PathBuf {
-    let build_target = std::env::var("CARGO_BUILD_TARGET").unwrap_or(String::new());
+    let build_target = std::env::var("CARGO_BUILD_TARGET").unwrap_or_default();
 
     let profile = if let Ok(env_profile) = std::env::var("NUSHELL_CARGO_PROFILE") {
         env_profile

crates/nu-test-support/src/macros.rs

@@ -212,6 +212,7 @@ macro_rules! nu_with_plugins {
 }
 
 use crate::{Outcome, NATIVE_PATH_ENV_VAR};
+use std::fmt::Write;
 use std::{
     path::Path,
     process::{Command, Stdio},
@@ -299,14 +300,14 @@ pub fn nu_with_plugin_run_test(cwd: impl AsRef<Path>, plugins: &[&str], command:
 
     let registrations: String = plugins
         .iter()
-        .map(|plugin_name| {
+        .fold(String::new(), |mut output, plugin_name| {
             let plugin = with_exe(plugin_name);
             let plugin_path = nu_path::canonicalize_with(&plugin, &test_bins)
                 .unwrap_or_else(|_| panic!("failed to canonicalize plugin {} path", &plugin));
             let plugin_path = plugin_path.to_string_lossy();
-            format!("register {plugin_path};")
-        })
-        .collect();
+            let _ = write!(output, "register {plugin_path};");
+            output
+        });
     let commands = format!("{registrations}{command}");
 
     let target_cwd = crate::fs::in_directory(&cwd);