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document some common fs functions

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Sylvestre Ledru 2022-07-19 12:41:10 +02:00
parent b9d8ee6605
commit ba44fd0e2b
1 changed files with 14 additions and 9 deletions
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23
src/uucore/src/lib/features/fs.rs
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@ -151,6 +151,7 @@ impl Hash for FileInformation {
}
}
/// resolve a relative path
pub fn resolve_relative_path(path: &Path) -> Cow<Path> {
if path.components().all(|e| e != Component::ParentDir) {
return path.into();
@ -200,10 +201,12 @@ pub enum ResolveMode {
Logical,
}
// copied from https://github.com/rust-lang/cargo/blob/2e4cfc2b7d43328b207879228a2ca7d427d188bb/src/cargo/util/paths.rs#L65-L90
// both projects are MIT https://github.com/rust-lang/cargo/blob/master/LICENSE-MIT
// for std impl progress see rfc https://github.com/rust-lang/rfcs/issues/2208
// replace this once that lands
/// Normalize a path by removing relative information
/// For example, convert 'bar/../foo/bar.txt' => 'foo/bar.txt'
/// copied from `<https://github.com/rust-lang/cargo/blob/2e4cfc2b7d43328b207879228a2ca7d427d188bb/src/cargo/util/paths.rs#L65-L90>`
/// both projects are MIT `<https://github.com/rust-lang/cargo/blob/master/LICENSE-MIT>`
/// for std impl progress see rfc `<https://github.com/rust-lang/rfcs/issues/2208>`
/// replace this once that lands
pub fn normalize_path(path: &Path) -> PathBuf {
let mut components = path.components().peekable();
let mut ret = if let Some(c @ Component::Prefix(..)) = components.peek().cloned() {
@ -393,12 +396,15 @@ pub fn display_permissions(metadata: &fs::Metadata, display_file_type: bool) ->
}
#[cfg(unix)]
/// Display the permissions of a file
/// On non unix like system, just show '----------'
pub fn display_permissions(metadata: &fs::Metadata, display_file_type: bool) -> String {
let mode: mode_t = metadata.mode() as mode_t;
display_permissions_unix(mode, display_file_type)
}
#[cfg(unix)]
/// Display the permissions of a file on a unix like system
pub fn display_permissions_unix(mode: mode_t, display_file_type: bool) -> String {
let mut result;
if display_file_type {
@ -463,11 +469,10 @@ pub fn display_permissions_unix(mode: mode_t, display_file_type: bool) -> String
result
}
// For some programs like install or mkdir, dir/. can be provided
// Special case to match GNU's behavior:
// install -d foo/. should work and just create foo/
// std::fs::create_dir("foo/."); fails in pure Rust
// See also mkdir.rs for another occurrence of this
/// For some programs like install or mkdir, dir/. can be provided
/// Special case to match GNU's behavior:
/// install -d foo/. should work and just create foo/
/// std::fs::create_dir("foo/."); fails in pure Rust
pub fn dir_strip_dot_for_creation(path: &Path) -> PathBuf {
if path.to_string_lossy().ends_with("/.") {
// Do a simple dance to strip the "/."