fd-find 6.2.0

fd is a simple, fast and user-friendly alternative to find.
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// Copyright (c) 2017 fd developers
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0>
// or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.

use std::env::current_dir;
use std::path::{Path, PathBuf};
use std::io;

pub fn path_absolute_form(path: &Path) -> io::Result<PathBuf> {
    if path.is_absolute() {
        Ok(path.to_path_buf())
    } else {
        let path = path.strip_prefix(".").unwrap_or(path);
        current_dir().map(|path_buf| path_buf.join(path))
    }
}

pub fn absolute_path(path: &Path) -> io::Result<PathBuf> {
    let path_buf = path_absolute_form(path)?;

    #[cfg(windows)]
    let path_buf = Path::new(
        path_buf
            .as_path()
            .to_string_lossy()
            .trim_left_matches(r"\\?\"),
    ).to_path_buf();

    Ok(path_buf)
}

// Path::is_dir() is not guarandteed to be intuitively correct for "." and ".."
// See: https://github.com/rust-lang/rust/issues/45302
pub fn is_dir(path: &Path) -> bool {
    if path.file_name().is_some() {
        path.is_dir()
    } else {
        path.is_dir() && path.canonicalize().is_ok()
    }
}