| use crate::fs::asyncify; |
| |
| use std::io; |
| use std::path::{Path, PathBuf}; |
| |
| /// Returns the canonical, absolute form of a path with all intermediate |
| /// components normalized and symbolic links resolved. |
| /// |
| /// This is an async version of [`std::fs::canonicalize`][std] |
| /// |
| /// [std]: std::fs::canonicalize |
| /// |
| /// # Platform-specific behavior |
| /// |
| /// This function currently corresponds to the `realpath` function on Unix |
| /// and the `CreateFile` and `GetFinalPathNameByHandle` functions on Windows. |
| /// Note that, this [may change in the future][changes]. |
| /// |
| /// On Windows, this converts the path to use [extended length path][path] |
| /// syntax, which allows your program to use longer path names, but means you |
| /// can only join backslash-delimited paths to it, and it may be incompatible |
| /// with other applications (if passed to the application on the command-line, |
| /// or written to a file another application may read). |
| /// |
| /// [changes]: https://doc.rust-lang.org/std/io/index.html#platform-specific-behavior |
| /// [path]: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath |
| /// |
| /// # Errors |
| /// |
| /// This function will return an error in the following situations, but is not |
| /// limited to just these cases: |
| /// |
| /// * `path` does not exist. |
| /// * A non-final component in path is not a directory. |
| /// |
| /// # Examples |
| /// |
| /// ```no_run |
| /// use tokio::fs; |
| /// use std::io; |
| /// |
| /// #[tokio::main] |
| /// async fn main() -> io::Result<()> { |
| /// let path = fs::canonicalize("../a/../foo.txt").await?; |
| /// Ok(()) |
| /// } |
| /// ``` |
| pub async fn canonicalize(path: impl AsRef<Path>) -> io::Result<PathBuf> { |
| let path = path.as_ref().to_owned(); |
| asyncify(move || std::fs::canonicalize(path)).await |
| } |
