Repository: sharkdp/fd
File: src/walk.rs (Rust)

Code before:
    /// Receiver is still buffering in order to sort the results, if the search finishes fast
    /// enough.
    Buffering,

    /// Receiver is directly printing results to the output.
    Streaming,
}

/// The Worker threads can result in a valid entry having PathBuf or an error.
pub enum WorkerResult {
    Entry(DirEntry),
    Error(ignore::Error),
}

/// Maximum size of the output buffer before flushing results to the console
pub const MAX_BUFFER_LENGTH: usize = 1000;
/// Default duration until output buffering switches to streaming.
pub const DEFAULT_MAX_BUFFER_TIME: Duration = Duration::from_millis(100);

/// Recursively scan the given search path for files / pathnames matching the pattern.
///
/// If the `--exec` argument was supplied, this will create a thread pool for executing
/// jobs in parallel from a given command line and the discovered paths. Otherwise, each
/// path will simply be written to standard output.
pub fn scan(path_vec: &[PathBuf], pattern: Arc<Regex>, config: Arc<Config>) -> Result<ExitCode> {
    let mut path_iter = path_vec.iter();
    let first_path_buf = path_iter
        .next()
        .expect("Error: Path vector can not be empty");
    let (tx, rx) = channel();

    let mut override_builder = OverrideBuilder::new(first_path_buf.as_path());

    for pattern in &config.exclude_patterns {
        override_builder
            .add(pattern)
            .map_err(|e| anyhow!("Malformed exclude pattern: {}", e))?;
    }
    let overrides = override_builder
        .build()
        .map_err(|_| anyhow!("Mismatch in exclude patterns"))?;

    let mut walker = WalkBuilder::new(first_path_buf.as_path());
    walker
        .hidden(config.ignore_hidden)
        .ignore(config.read_fdignore)
        .parents(config.read_parent_ignore && (config.read_fdignore || config.read_vcsignore))
        .git_ignore(config.read_vcsignore)
        .git_global(config.read_vcsignore)
        .git_exclude(config.read_vcsignore)
        .overrides(overrides)

Review comment (suggestion):
Another option, not sure if it is necessarily better could be to do:

```rust
let (first_path, paths) = paths.split_first().expect("Error: Path vector can not be empty");
```
then keep the rest of your changes, except line 121 becomes
```rust
for path in paths {
```

Code after:
    /// Receiver is still buffering in order to sort the results, if the search finishes fast
    /// enough.
    Buffering,

    /// Receiver is directly printing results to the output.
    Streaming,
}

/// The Worker threads can result in a valid entry having PathBuf or an error.
pub enum WorkerResult {
    Entry(DirEntry),
    Error(ignore::Error),
}

/// Maximum size of the output buffer before flushing results to the console
pub const MAX_BUFFER_LENGTH: usize = 1000;
/// Default duration until output buffering switches to streaming.
pub const DEFAULT_MAX_BUFFER_TIME: Duration = Duration::from_millis(100);

/// Recursively scan the given search path for files / pathnames matching the pattern.
///
/// If the `--exec` argument was supplied, this will create a thread pool for executing
/// jobs in parallel from a given command line and the discovered paths. Otherwise, each
/// path will simply be written to standard output.
pub fn scan(paths: &[PathBuf], pattern: Arc<Regex>, config: Arc<Config>) -> Result<ExitCode> {
    let first_path = &paths[0];
    let (tx, rx) = channel();

    let mut override_builder = OverrideBuilder::new(first_path);

    for pattern in &config.exclude_patterns {
        override_builder
            .add(pattern)
            .map_err(|e| anyhow!("Malformed exclude pattern: {}", e))?;
    }
    let overrides = override_builder
        .build()
        .map_err(|_| anyhow!("Mismatch in exclude patterns"))?;

    let mut walker = WalkBuilder::new(first_path);
    walker
        .hidden(config.ignore_hidden)
        .ignore(config.read_fdignore)
        .parents(config.read_parent_ignore && (config.read_fdignore || config.read_vcsignore))
        .git_ignore(config.read_vcsignore)
        .git_global(config.read_vcsignore)
        .git_exclude(config.read_vcsignore)
        .overrides(overrides)
        .follow_links(config.follow_links)
        // No need to check for supported platforms, option is unavailable on unsupported ones
        .same_file_system(config.one_file_system)