| #![allow(dead_code)] |
| |
| use std::error::Error as StdError; |
| use std::fmt::{self, Display}; |
| use std::io::{self, Read}; |
| use std::path::{Path, PathBuf}; |
| |
| pub(crate) type Result<T> = std::result::Result<T, Error>; |
| |
| #[derive(Debug)] |
| pub(crate) struct Error { |
| source: Option<io::Error>, |
| message: String, |
| } |
| |
| impl Error { |
| pub fn kind(&self) -> io::ErrorKind { |
| match &self.source { |
| Some(io_error) => io_error.kind(), |
| None => io::ErrorKind::Other, |
| } |
| } |
| } |
| |
| impl Display for Error { |
| fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
| formatter.write_str(&self.message) |
| } |
| } |
| |
| impl StdError for Error { |
| fn source(&self) -> Option<&(dyn StdError + 'static)> { |
| let source = self.source.as_ref()?; |
| Some(source) |
| } |
| } |
| |
| macro_rules! err { |
| ($io_error:expr, $fmt:expr $(, $path:expr)* $(,)?) => { |
| Err(Error { |
| source: Option::from($io_error), |
| message: format!($fmt $(, $path.display())*), |
| }) |
| } |
| } |
| |
| pub(crate) fn copy(from: impl AsRef<Path>, to: impl AsRef<Path>) -> Result<u64> { |
| let from = from.as_ref(); |
| let to = to.as_ref(); |
| match std::fs::copy(from, to) { |
| Ok(n) => Ok(n), |
| Err(e) => err!(e, "Failed to copy `{}` -> `{}`", from, to), |
| } |
| } |
| |
| pub(crate) fn create_dir_all(path: impl AsRef<Path>) -> Result<()> { |
| let path = path.as_ref(); |
| match std::fs::create_dir_all(path) { |
| Ok(()) => Ok(()), |
| Err(e) => err!(e, "Failed to create directory `{}`", path), |
| } |
| } |
| |
| pub(crate) fn current_dir() -> Result<PathBuf> { |
| match std::env::current_dir() { |
| Ok(dir) => Ok(dir), |
| Err(e) => err!(e, "Failed to determine current directory"), |
| } |
| } |
| |
| pub(crate) fn exists(path: impl AsRef<Path>) -> bool { |
| let path = path.as_ref(); |
| // If path is a symlink, this returns true, regardless of whether the |
| // symlink points to a path that exists. |
| std::fs::symlink_metadata(path).is_ok() |
| } |
| |
| pub(crate) fn read(path: impl AsRef<Path>) -> Result<Vec<u8>> { |
| let path = path.as_ref(); |
| match std::fs::read(path) { |
| Ok(string) => Ok(string), |
| Err(e) => err!(e, "Failed to read file `{}`", path), |
| } |
| } |
| |
| pub(crate) fn read_stdin() -> Result<Vec<u8>> { |
| let mut bytes = Vec::new(); |
| match io::stdin().read_to_end(&mut bytes) { |
| Ok(_len) => Ok(bytes), |
| Err(e) => err!(e, "Failed to read input from stdin"), |
| } |
| } |
| |
| pub(crate) fn remove_file(path: impl AsRef<Path>) -> Result<()> { |
| let path = path.as_ref(); |
| match std::fs::remove_file(path) { |
| Ok(()) => Ok(()), |
| Err(e) => err!(e, "Failed to remove file `{}`", path), |
| } |
| } |
| |
| pub(crate) fn remove_dir(path: impl AsRef<Path>) -> Result<()> { |
| let path = path.as_ref(); |
| match std::fs::remove_dir(path) { |
| Ok(()) => Ok(()), |
| Err(e) => err!(e, "Failed to remove directory `{}`", path), |
| } |
| } |
| |
| fn symlink<'a>( |
| original: &'a Path, |
| link: &'a Path, |
| fun: fn(&'a Path, &'a Path) -> io::Result<()>, |
| ) -> Result<()> { |
| match fun(original, link) { |
| Ok(()) => Ok(()), |
| Err(e) => err!( |
| e, |
| "Failed to create symlink `{}` pointing to `{}`", |
| link, |
| original, |
| ), |
| } |
| } |
| |
| pub(crate) fn symlink_fail(original: impl AsRef<Path>, link: impl AsRef<Path>) -> Result<()> { |
| err!( |
| None, |
| "Failed to create symlink `{}` pointing to `{}`", |
| link.as_ref(), |
| original.as_ref(), |
| ) |
| } |
| |
| #[cfg(unix)] |
| #[allow(unused_imports)] |
| pub(crate) use self::symlink_file as symlink_dir; |
| |
| #[cfg(not(any(unix, windows)))] |
| #[allow(unused_imports)] |
| pub(crate) use self::symlink_fail as symlink_dir; |
| |
| #[cfg(unix)] |
| pub(crate) fn symlink_file(original: impl AsRef<Path>, link: impl AsRef<Path>) -> Result<()> { |
| symlink(original.as_ref(), link.as_ref(), std::os::unix::fs::symlink) |
| } |
| |
| #[cfg(windows)] |
| pub(crate) fn symlink_file(original: impl AsRef<Path>, link: impl AsRef<Path>) -> Result<()> { |
| symlink( |
| original.as_ref(), |
| link.as_ref(), |
| std::os::windows::fs::symlink_file, |
| ) |
| } |
| |
| #[cfg(windows)] |
| pub(crate) fn symlink_dir(original: impl AsRef<Path>, link: impl AsRef<Path>) -> Result<()> { |
| symlink( |
| original.as_ref(), |
| link.as_ref(), |
| std::os::windows::fs::symlink_dir, |
| ) |
| } |
| |
| pub(crate) fn write(path: impl AsRef<Path>, contents: impl AsRef<[u8]>) -> Result<()> { |
| let path = path.as_ref(); |
| match std::fs::write(path, contents) { |
| Ok(()) => Ok(()), |
| Err(e) => err!(e, "Failed to write file `{}`", path), |
| } |
| } |