use std::ffi::OsString;
use std::fs::read_dir;
use std::io::ErrorKind;
use std::path::PathBuf;
use std::{env, io};
pub fn project_root() -> io::Result<PathBuf> {
let path = env::current_dir()?;
let mut path_ancestors = path.as_path().ancestors();
while let Some(p) = path_ancestors.next() {
let has_cargo = read_dir(p)?
.into_iter()
.any(|p| p.unwrap().file_name() == OsString::from("Cargo.lock"));
if has_cargo {
return Ok(PathBuf::from(p));
}
}
Err(io::Error::new(
ErrorKind::NotFound,
"Ran out of places to find Cargo.toml",
))
}