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#![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 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 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),
}
}
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