use crate::fs::Stack;use std::path::{Path, PathBuf};impl Stack { pub fn root(&self) -> &Path { &self.root } pub fn current(&self) -> &Path { &self.current } pub fn current_relative(&self) -> &Path { &self.current_relative }}impl Stack { /// Create a new instance with `root` being the base for all future paths we handle, assuming it to be valid which includes /// symbolic links to be included in it as well. pub fn new(root: impl Into<PathBuf>) -> Self { let root = root.into(); Stack { current: root.clone(), current_relative: PathBuf::with_capacity(128), valid_components: 0, root, } } /// Set the current stack to point to the `relative` path and call `push_comp()` each time a new path component is popped /// along with the stacks state for inspection to perform an operation that produces some data. /// /// The full path to `relative` will be returned along with the data returned by push_comp. pub fn make_relative_path_current( &mut self, relative: impl AsRef<Path>, mut push_comp: impl FnMut(&mut std::iter::Peekable<std::path::Components<'_>>, &Self) -> std::io::Result<()>, mut pop_comp: impl FnMut(&Self), ) -> std::io::Result<()> { let relative = relative.as_ref(); debug_assert!( relative.is_relative(), "only index paths are handled correctly here, must be relative" ); let mut components = relative.components().peekable(); let mut existing_components = self.current_relative.components(); let mut matching_components = 0; while let (Some(existing_comp), Some(new_comp)) = (existing_components.next(), components.peek()) { if existing_comp == *new_comp { components.next(); matching_components += 1; } else { break; } } for _ in 0..self.valid_components - matching_components { self.current.pop(); self.current_relative.pop(); pop_comp(&*self); } self.valid_components = matching_components; while let Some(comp) = components.next() { self.current.push(comp); self.current_relative.push(comp); self.valid_components += 1; let res = push_comp(&mut components, &*self); if let Err(err) = res { self.current.pop(); self.current_relative.pop(); self.valid_components -= 1; pop_comp(&*self); return Err(err); } } Ok(()) }}
use crate::fs::Stack;
use std::path::{Path, PathBuf};
impl Stack {
pub fn root(&self) -> &Path {
&self.root
}
pub fn current(&self) -> &Path {
&self.current
}
pub fn current_relative(&self) -> &Path {
&self.current_relative
}
}
impl Stack {
/// Create a new instance with `root` being the base for all future paths we handle, assuming it to be valid which includes
/// symbolic links to be included in it as well.
pub fn new(root: impl Into<PathBuf>) -> Self {
let root = root.into();
Stack {
current: root.clone(),
current_relative: PathBuf::with_capacity(128),
valid_components: 0,
root,
}
}
/// Set the current stack to point to the `relative` path and call `push_comp()` each time a new path component is popped
/// along with the stacks state for inspection to perform an operation that produces some data.
///
/// The full path to `relative` will be returned along with the data returned by push_comp.
pub fn make_relative_path_current(
&mut self,
relative: impl AsRef<Path>,
mut push_comp: impl FnMut(&mut std::iter::Peekable<std::path::Components<'_>>, &Self) -> std::io::Result<()>,
mut pop_comp: impl FnMut(&Self),
) -> std::io::Result<()> {
let relative = relative.as_ref();
debug_assert!(
relative.is_relative(),
"only index paths are handled correctly here, must be relative"
);
let mut components = relative.components().peekable();
let mut existing_components = self.current_relative.components();
let mut matching_components = 0;
while let (Some(existing_comp), Some(new_comp)) = (existing_components.next(), components.peek()) {
if existing_comp == *new_comp {
components.next();
matching_components += 1;
} else {
break;
}
}
for _ in 0..self.valid_components - matching_components {
self.current.pop();
self.current_relative.pop();
pop_comp(&*self);
}
self.valid_components = matching_components;
while let Some(comp) = components.next() {
self.current.push(comp);
self.current_relative.push(comp);
self.valid_components += 1;
let res = push_comp(&mut components, &*self);
if let Err(err) = res {
self.current.pop();
self.current_relative.pop();
self.valid_components -= 1;
pop_comp(&*self);
return Err(err);
}
}
Ok(())
}
}