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use std::path::{Path, PathBuf};
fn expand_tilde_with(path: impl AsRef<Path>, home: Option<PathBuf>) -> PathBuf {
let path = path.as_ref();
if !path.starts_with("~") {
return path.into();
}
match home {
None => path.into(),
Some(mut h) => {
if h == Path::new("/") {
path.strip_prefix("~").unwrap_or(path).into()
} else {
if let Ok(p) = path.strip_prefix("~/") {
h.push(p)
}
h
}
}
}
}
pub fn expand_tilde(path: impl AsRef<Path>) -> PathBuf {
expand_tilde_with(path, dirs_next::home_dir())
}
#[cfg(test)]
mod tests {
use super::*;
fn check_expanded(s: &str) {
let home = Path::new("/home");
let buf = Some(PathBuf::from(home));
assert!(expand_tilde_with(Path::new(s), buf).starts_with(&home));
let home = Path::new("/");
let buf = Some(PathBuf::from(home));
assert!(!expand_tilde_with(Path::new(s), buf).starts_with("//"));
}
fn check_not_expanded(s: &str) {
let home = PathBuf::from("/home");
let expanded = expand_tilde_with(Path::new(s), Some(home));
assert!(expanded == Path::new(s));
}
#[test]
fn string_with_tilde() {
check_expanded("~");
}
#[test]
fn string_with_tilde_forward_slash() {
check_expanded("~/test/");
}
#[test]
fn string_with_tilde_double_forward_slash() {
check_expanded("~//test/");
}
#[test]
fn does_not_expand_tilde_if_tilde_is_not_first_character() {
check_not_expanded("1~1");
}
#[cfg(windows)]
#[test]
fn string_with_tilde_backslash() {
check_expanded("~\\test/test2/test3");
}
#[cfg(windows)]
#[test]
fn string_with_double_tilde_backslash() {
check_expanded("~\\\\test\\test2/test3");
}
}