use std::path::{Path, PathBuf}; use crate::DOT_GIT_DIR; pub(crate) fn shorten_path_with_cwd(cursor: PathBuf, cwd: Option<&Path>) -> PathBuf { fn comp_len(c: std::path::Component<'_>) -> usize { use std::path::Component::*; match c { Prefix(p) => p.as_os_str().len(), CurDir => 1, ParentDir => 2, Normal(p) => p.len(), RootDir => 1, } } if let Some(cwd) = cwd { debug_assert_eq!(cursor.file_name().and_then(|f| f.to_str()), Some(DOT_GIT_DIR)); let parent = cursor.parent().expect(".git appended"); cwd.strip_prefix(parent) .ok() .and_then(|path_relative_to_cwd| { let relative_path_components = path_relative_to_cwd.components().count(); let current_component_len = cursor.components().map(comp_len).sum::<usize>(); (relative_path_components * "..".len() < current_component_len).then(|| { std::iter::repeat("..") .take(relative_path_components) .chain(Some(DOT_GIT_DIR)) .collect() }) }) .unwrap_or(cursor) } else { cursor }} /// Find the number of components parenting the `search_dir` before the first directory in `ceiling_dirs`./// `search_dir` needs to be absolutized, and we absolutize every ceiling as well.pub(crate) fn find_ceiling_height(search_dir: &Path, ceiling_dirs: &[PathBuf], cwd: Option<&Path>) -> Option<usize> { ceiling_dirs .iter() .filter_map(|ceiling_dir| { let mut ceiling_dir = git_path::absolutize(ceiling_dir, cwd); match (search_dir.is_absolute(), ceiling_dir.is_absolute()) { (true, false) => ceiling_dir = cwd?.join(ceiling_dir.as_ref()).into(), (false, true) => { let stripped = ceiling_dir.as_ref().strip_prefix(cwd?).ok()?.to_owned(); ceiling_dir = stripped.into(); } (false, false) | (true, true) => {} }; search_dir .strip_prefix(ceiling_dir.as_ref()) .ok() .map(|path_relative_to_ceiling| path_relative_to_ceiling.components().count()) }) .min()} /// Returns the device ID of the directory.#[cfg(target_os = "linux")]pub(crate) fn device_id(m: &std::fs::Metadata) -> u64 { use std::os::linux::fs::MetadataExt; m.st_dev()} /// Returns the device ID of the directory.#[cfg(all(unix, not(target_os = "linux")))]pub(crate) fn device_id(m: &std::fs::Metadata) -> u64 { use std::os::unix::fs::MetadataExt; m.dev()}
use std::path::{Path, PathBuf};
use crate::DOT_GIT_DIR;
pub(crate) fn shorten_path_with_cwd(cursor: PathBuf, cwd: Option<&Path>) -> PathBuf {
fn comp_len(c: std::path::Component<'_>) -> usize {
use std::path::Component::*;
match c {
Prefix(p) => p.as_os_str().len(),
CurDir => 1,
ParentDir => 2,
Normal(p) => p.len(),
RootDir => 1,
}
}
if let Some(cwd) = cwd {
debug_assert_eq!(cursor.file_name().and_then(|f| f.to_str()), Some(DOT_GIT_DIR));
let parent = cursor.parent().expect(".git appended");
cwd.strip_prefix(parent)
.ok()
.and_then(|path_relative_to_cwd| {
let relative_path_components = path_relative_to_cwd.components().count();
let current_component_len = cursor.components().map(comp_len).sum::<usize>();
(relative_path_components * "..".len() < current_component_len).then(|| {
std::iter::repeat("..")
.take(relative_path_components)
.chain(Some(DOT_GIT_DIR))
.collect()
})
})
.unwrap_or(cursor)
} else {
cursor
}
}
/// Find the number of components parenting the `search_dir` before the first directory in `ceiling_dirs`.
/// `search_dir` needs to be absolutized, and we absolutize every ceiling as well.
pub(crate) fn find_ceiling_height(search_dir: &Path, ceiling_dirs: &[PathBuf], cwd: Option<&Path>) -> Option<usize> {
ceiling_dirs
.iter()
.filter_map(|ceiling_dir| {
let mut ceiling_dir = git_path::absolutize(ceiling_dir, cwd);
match (search_dir.is_absolute(), ceiling_dir.is_absolute()) {
(true, false) => ceiling_dir = cwd?.join(ceiling_dir.as_ref()).into(),
(false, true) => {
let stripped = ceiling_dir.as_ref().strip_prefix(cwd?).ok()?.to_owned();
ceiling_dir = stripped.into();
}
(false, false) | (true, true) => {}
};
search_dir
.strip_prefix(ceiling_dir.as_ref())
.ok()
.map(|path_relative_to_ceiling| path_relative_to_ceiling.components().count())
})
.min()
}
/// Returns the device ID of the directory.
#[cfg(target_os = "linux")]
pub(crate) fn device_id(m: &std::fs::Metadata) -> u64 {
use std::os::linux::fs::MetadataExt;
m.st_dev()
}
/// Returns the device ID of the directory.
#[cfg(all(unix, not(target_os = "linux")))]
pub(crate) fn device_id(m: &std::fs::Metadata) -> u64 {
use std::os::unix::fs::MetadataExt;
m.dev()
}