mirror of https://github.com/sharkdp/fd.git
56 lines
1.8 KiB
Rust
56 lines
1.8 KiB
Rust
use std::path::{Path, PathBuf};
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use std::io;
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/// Get a relative path with respect to a certain base path.
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/// See: https://stackoverflow.com/a/39343127/704831
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pub fn path_relative_from(path: &Path, base: &Path) -> Option<PathBuf> {
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use std::path::Component;
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if path.is_absolute() != base.is_absolute() {
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if path.is_absolute() {
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Some(PathBuf::from(path))
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} else {
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Some(PathBuf::from(base.join(path)))
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}
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} else {
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let mut ita = path.components();
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let mut itb = base.components();
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let mut comps: Vec<Component> = vec![];
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loop {
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match (ita.next(), itb.next()) {
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(None, None) => break,
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(Some(a), None) => {
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comps.push(a);
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comps.extend(ita.by_ref());
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break;
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}
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(None, _) => comps.push(Component::ParentDir),
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(Some(a), Some(b)) if comps.is_empty() && a == b => (),
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(Some(a), Some(b)) if b == Component::CurDir => comps.push(a),
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(Some(_), Some(b)) if b == Component::ParentDir => return None,
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(Some(a), Some(_)) => {
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comps.push(Component::ParentDir);
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for _ in itb {
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comps.push(Component::ParentDir);
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}
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comps.push(a);
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comps.extend(ita.by_ref());
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break;
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}
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}
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}
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Some(comps.iter().map(|c| c.as_os_str()).collect())
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}
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}
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pub fn absolute_path(path: &Path) -> io::Result<PathBuf> {
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let path_buf = path.canonicalize()?;
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#[cfg(windows)]
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let path_buf = Path::new(path_buf.as_path().to_string_lossy().trim_left_matches(
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r"\\?\",
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)).to_path_buf();
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Ok(path_buf)
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}
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