Note shebang line splitting inconsistency in readme (#757)

README.adoc

@@ -1224,6 +1224,15 @@ When a script with a shebang is executed, the system supplies the path to the sc
 
 With the above shebang, `just` will change its working directory to the location of the script. If you'd rather leave the working directory unchanged, use `#!/usr/bin/env just --working-directory . --justfile`.
 
+Note: Shebang line splitting is not consistent across operating systems. The previous examples have only been tested on macOS. On Linux, you may need to pass the `-S` flag to `env`:
+
+```
+#!/usr/bin/env -S just --justfile
+
+default:
+  echo foo
+```
+
 == Miscellanea
 
 === Companion Tools

src/compilation_error.rs

@@ -54,10 +54,10 @@ impl Display for CompilationError<'_> {
 
       InvalidEscapeSequence { character } => {
         let representation = match character {
-          '`' => r"\`".to_string(),
-          '\\' => r"\".to_string(),
-          '\'' => r"'".to_string(),
-          '"' => r#"""#.to_string(),
+          '`' => r"\`".to_owned(),
+          '\\' => r"\".to_owned(),
+          '\'' => r"'".to_owned(),
+          '"' => r#"""#.to_owned(),
           _ => character.escape_default().collect(),
         };
         writeln!(f, "`\\{}` is not a valid escape sequence", representation)?;

src/config.rs

@@ -512,19 +512,21 @@ impl Config {
 
     match &self.subcommand {
       Choose { overrides, chooser } =>
-        self.choose(justfile, &search, overrides, chooser.as_deref()),
+        self.choose(justfile, &search, overrides, chooser.as_deref())?,
       Dump => Self::dump(justfile),
-      Evaluate { overrides } => self.run(justfile, &search, overrides, &[]),
+      Evaluate { overrides } => self.run(justfile, &search, overrides, &[])?,
       List => self.list(justfile),
       Run {
         arguments,
         overrides,
-      } => self.run(justfile, &search, overrides, arguments),
-      Show { ref name } => Self::show(&name, justfile),
+      } => self.run(justfile, &search, overrides, arguments)?,
+      Show { ref name } => Self::show(&name, justfile)?,
       Summary => self.summary(justfile),
       Variables => Self::variables(justfile),
       Completions { .. } | Edit | Init => unreachable!(),
     }
+
+    Ok(())
   }
 
   fn choose(
@@ -620,9 +622,8 @@ impl Config {
     self.run(justfile, search, overrides, &recipes)
   }
 
-  fn dump(justfile: Justfile) -> Result<(), i32> {
+  fn dump(justfile: Justfile) {
     println!("{}", justfile);
-    Ok(())
   }
 
   pub(crate) fn edit(search: &Search) -> Result<(), i32> {
@@ -674,7 +675,7 @@ impl Config {
     }
   }
 
-  fn list(&self, justfile: Justfile) -> Result<(), i32> {
+  fn list(&self, justfile: Justfile) {
     // Construct a target to alias map.
     let mut recipe_aliases: BTreeMap<&str, Vec<&str>> = BTreeMap::new();
     for alias in justfile.aliases.values() {
@@ -756,8 +757,6 @@ impl Config {
         println!();
       }
     }
-
-    Ok(())
   }
 
   fn run(
@@ -798,7 +797,7 @@ impl Config {
     }
   }
 
-  fn summary(&self, justfile: Justfile) -> Result<(), i32> {
+  fn summary(&self, justfile: Justfile) {
     if justfile.count() == 0 {
       eprintln!("Justfile contains no recipes.");
     } else {
@@ -810,18 +809,16 @@ impl Config {
         .join(" ");
       println!("{}", summary);
     }
-    Ok(())
   }
 
-  fn variables(justfile: Justfile) -> Result<(), i32> {
+  fn variables(justfile: Justfile) {
     for (i, (_, assignment)) in justfile.assignments.iter().enumerate() {
       if i > 0 {
         print!(" ");
       }
       print!("{}", assignment.name)
     }
     println!();
-    Ok(())
   }
 }
 

src/evaluator.rs

@@ -212,7 +212,7 @@ impl<'src, 'run> Evaluator<'src, 'run> {
           String::new()
         } else {
           return Err(RuntimeError::Internal {
-            message: "missing parameter without default".to_string(),
+            message: "missing parameter without default".to_owned(),
           });
         }
       } else if parameter.kind.is_variadic() {

src/function.rs

@@ -34,19 +34,19 @@ impl Function {
 }
 
 fn arch(_context: &FunctionContext) -> Result<String, String> {
-  Ok(target::arch().to_string())
+  Ok(target::arch().to_owned())
 }
 
 fn os(_context: &FunctionContext) -> Result<String, String> {
-  Ok(target::os().to_string())
+  Ok(target::os().to_owned())
 }
 
 fn os_family(_context: &FunctionContext) -> Result<String, String> {
-  Ok(target::os_family().to_string())
+  Ok(target::os_family().to_owned())
 }
 
 fn invocation_directory(context: &FunctionContext) -> Result<String, String> {
-  Platform::to_shell_path(
+  Platform::convert_native_path(
     &context.search.working_directory,
     context.invocation_directory,
   )
@@ -115,7 +115,7 @@ fn env_var_or_default(
   }
 
   match env::var(key) {
-    Err(NotPresent) => Ok(default.to_string()),
+    Err(NotPresent) => Ok(default.to_owned()),
     Err(NotUnicode(os_string)) => Err(format!(
       "environment variable `{}` not unicode: {:?}",
       key, os_string

src/interrupt_handler.rs

@@ -54,7 +54,7 @@ impl InterruptHandler {
   pub(crate) fn unblock(&mut self) {
     if self.blocks == 0 {
       eprintln!("{}", RuntimeError::Internal {
-        message: "attempted to unblock interrupt handler, but handler was not blocked".to_string(),
+        message: "attempted to unblock interrupt handler, but handler was not blocked".to_owned(),
       });
       std::process::exit(EXIT_FAILURE);
     }

src/lib.rs

@@ -27,6 +27,7 @@
   clippy::string_add,
   clippy::struct_excessive_bools,
   clippy::too_many_lines,
+  clippy::unnecessary_wraps,
   clippy::unreachable,
   clippy::unwrap_in_result,
   clippy::unwrap_used,

src/output.rs

@@ -25,7 +25,7 @@ pub(crate) fn output(mut command: Command) -> Result<String, OutputError> {
           } else {
             utf8
           }
-          .to_string(),
+          .to_owned(),
         ),
       }
     },

src/parser.rs

@@ -527,7 +527,7 @@ impl<'tokens, 'src> Parser<'tokens, 'src> {
         })
       },
       _ => Err(token.error(CompilationErrorKind::Internal {
-        message: "`Parser::parse_string_literal` called on non-string token".to_string(),
+        message: "`Parser::parse_string_literal` called on non-string token".to_owned(),
       })),
     }
   }

src/platform.rs

@@ -37,7 +37,7 @@ impl PlatformInterface for Platform {
     exit_status.signal()
   }
 
-  fn to_shell_path(_working_directory: &Path, path: &Path) -> Result<String, String> {
+  fn convert_native_path(_working_directory: &Path, path: &Path) -> Result<String, String> {
     path
       .to_str()
       .map(str::to_string)
@@ -91,7 +91,7 @@ impl PlatformInterface for Platform {
     None
   }
 
-  fn to_shell_path(working_directory: &Path, path: &Path) -> Result<String, String> {
+  fn convert_native_path(working_directory: &Path, path: &Path) -> Result<String, String> {
     // Translate path from windows style to unix style
     let mut cygpath = Command::new("cygpath");
     cygpath.current_dir(working_directory);

src/platform_interface.rs

@@ -18,5 +18,5 @@ pub(crate) trait PlatformInterface {
   fn signal_from_exit_status(exit_status: process::ExitStatus) -> Option<i32>;
 
   /// Translate a path from a "native" path to a path the interpreter expects
-  fn to_shell_path(working_directory: &Path, path: &Path) -> Result<String, String>;
+  fn convert_native_path(working_directory: &Path, path: &Path) -> Result<String, String>;
 }

src/recipe.rs

@@ -154,7 +154,7 @@ impl<'src, D> Recipe<'src, D> {
       let shebang_line = evaluated_lines
         .first()
         .ok_or_else(|| RuntimeError::Internal {
-          message: "evaluated_lines was empty".to_string(),
+          message: "evaluated_lines was empty".to_owned(),
         })?;
 
       let Shebang {
@@ -195,7 +195,7 @@ impl<'src, D> Recipe<'src, D> {
         Err(io_error) => {
           return Err(RuntimeError::Shebang {
             recipe: self.name(),
-            command: interpreter.to_string(),
+            command: interpreter.to_owned(),
             argument: argument.map(String::from),
             io_error,
           });

tests/invocation_directory.rs

@@ -4,7 +4,7 @@ use executable_path::executable_path;
 use test_utilities::tempdir;
 
 #[cfg(unix)]
-fn to_shell_path(path: &Path) -> String {
+fn convert_native_path(path: &Path) -> String {
   fs::canonicalize(path)
     .expect("canonicalize failed")
     .to_str()
@@ -13,7 +13,7 @@ fn to_shell_path(path: &Path) -> String {
 }
 
 #[cfg(windows)]
-fn to_shell_path(path: &Path) -> String {
+fn convert_native_path(path: &Path) -> String {
   // Translate path from windows style to unix style
   let mut cygpath = process::Command::new("cygpath");
   cygpath.arg("--unix");
@@ -60,7 +60,7 @@ fn test_invocation_directory() {
   let mut failure = false;
 
   let expected_status = 0;
-  let expected_stdout = to_shell_path(&subdir) + "\n";
+  let expected_stdout = convert_native_path(&subdir) + "\n";
   let expected_stderr = "";
 
   let status = output.status.code().unwrap();