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use std::path::{Path, PathBuf, Component};
#[derive(Debug)]
pub enum NormalizeError {
EmptyInput,
}
pub fn normalize_path(
_root: &Path,
origin: &Path,
input: &Path,
) -> Result<PathBuf, NormalizeError> {
if input.as_os_str().is_empty() {
return Err(NormalizeError::EmptyInput);
}
let mut stack = Vec::new();
let origin_joint_input = origin.join(input);
for component in origin_joint_input.components() {
match component {
Component::CurDir => (),
Component::ParentDir => { stack.pop(); },
Component::Prefix(_) => { stack.push(component); },
Component::Normal(_) => { stack.push(component); },
Component::RootDir => { stack.push(component) },
}
}
Ok(PathBuf::from_iter(stack))
}
#[cfg(test)]
mod tests {
use std::path::Path;
use super::{NormalizeError, normalize_path};
#[test]
fn empty_path_returns_error() {
let root = Path::new("");
let origin_dir = Path::new("");
let input = Path::new("");
let result = normalize_path(root, origin_dir, input);
assert!(matches!(result, Err(NormalizeError::EmptyInput)));
}
#[test]
fn plain_filename_with_root_at_cwd_returns_filename() {
let root = Path::new("");
let origin_dir = Path::new("");
let input = Path::new("main.rs");
let result = normalize_path(root, origin_dir, input);
assert!(result.is_ok());
assert_eq!(result.unwrap(), Path::new("main.rs"));
}
#[test]
fn relative_path_from_origin_is_resolved() {
let root = Path::new("");
let origin_dir = Path::new("src");
let input = Path::new("../main.rs");
let result = normalize_path(root, origin_dir, input);
assert!(result.is_ok());
assert_eq!(result.unwrap(), Path::new("main.rs"));
}
}
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