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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::ffi::OsStr;
use std::fs::remove_dir_all;
use std::mem;
use std::path::{self, Path, PathBuf};
use std::{fmt, fs, io};
use crate::error::IoResultExt;
use crate::Builder;
/// Create a new temporary directory.
///
/// The `tempdir` function creates a directory in the file system
/// and returns a [`TempDir`].
/// The directory will be automatically deleted when the `TempDir`s
/// destructor is run.
///
/// # Resource Leaking
///
/// See [the resource leaking][resource-leaking] docs on `TempDir`.
///
/// # Errors
///
/// If the directory can not be created, `Err` is returned.
///
/// # Examples
///
/// ```
/// use tempfile::tempdir;
/// use std::fs::File;
/// use std::io::{self, Write};
///
/// # fn main() {
/// # if let Err(_) = run() {
/// # ::std::process::exit(1);
/// # }
/// # }
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of `std::env::temp_dir()`
/// let tmp_dir = tempdir()?;
///
/// let file_path = tmp_dir.path().join("my-temporary-note.txt");
/// let mut tmp_file = File::create(file_path)?;
/// writeln!(tmp_file, "Brian was here. Briefly.")?;
///
/// // `tmp_dir` goes out of scope, the directory as well as
/// // `tmp_file` will be deleted here.
/// drop(tmp_file);
/// tmp_dir.close()?;
/// # Ok(())
/// # }
/// ```
///
/// [`TempDir`]: struct.TempDir.html
/// [resource-leaking]: struct.TempDir.html#resource-leaking
pub fn tempdir() -> io::Result<TempDir> {
TempDir::new()
}
/// Create a new temporary directory in a specific directory.
///
/// The `tempdir_in` function creates a directory in the specified directory
/// and returns a [`TempDir`].
/// The directory will be automatically deleted when the `TempDir`s
/// destructor is run.
///
/// # Resource Leaking
///
/// See [the resource leaking][resource-leaking] docs on `TempDir`.
///
/// # Errors
///
/// If the directory can not be created, `Err` is returned.
///
/// # Examples
///
/// ```
/// use tempfile::tempdir_in;
/// use std::fs::File;
/// use std::io::{self, Write};
///
/// # fn main() {
/// # if let Err(_) = run() {
/// # ::std::process::exit(1);
/// # }
/// # }
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of the current directory.
/// let tmp_dir = tempdir_in(".")?;
///
/// let file_path = tmp_dir.path().join("my-temporary-note.txt");
/// let mut tmp_file = File::create(file_path)?;
/// writeln!(tmp_file, "Brian was here. Briefly.")?;
///
/// // `tmp_dir` goes out of scope, the directory as well as
/// // `tmp_file` will be deleted here.
/// drop(tmp_file);
/// tmp_dir.close()?;
/// # Ok(())
/// # }
/// ```
///
/// [`TempDir`]: struct.TempDir.html
/// [resource-leaking]: struct.TempDir.html#resource-leaking
pub fn tempdir_in<P: AsRef<Path>>(dir: P) -> io::Result<TempDir> {
TempDir::new_in(dir)
}
/// A directory in the filesystem that is automatically deleted when
/// it goes out of scope.
///
/// The [`TempDir`] type creates a directory on the file system that
/// is deleted once it goes out of scope. At construction, the
/// `TempDir` creates a new directory with a randomly generated name.
///
/// The default constructor, [`TempDir::new()`], creates directories in
/// the location returned by [`std::env::temp_dir()`], but `TempDir`
/// can be configured to manage a temporary directory in any location
/// by constructing with a [`Builder`].
///
/// After creating a `TempDir`, work with the file system by doing
/// standard [`std::fs`] file system operations on its [`Path`],
/// which can be retrieved with [`TempDir::path()`]. Once the `TempDir`
/// value is dropped, the directory at the path will be deleted, along
/// with any files and directories it contains. It is your responsibility
/// to ensure that no further file system operations are attempted
/// inside the temporary directory once it has been deleted.
///
/// # Resource Leaking
///
/// Various platform-specific conditions may cause `TempDir` to fail
/// to delete the underlying directory. It's important to ensure that
/// handles (like [`File`] and [`ReadDir`]) to files inside the
/// directory are dropped before the `TempDir` goes out of scope. The
/// `TempDir` destructor will silently ignore any errors in deleting
/// the directory; to instead handle errors call [`TempDir::close()`].
///
/// Note that if the program exits before the `TempDir` destructor is
/// run, such as via [`std::process::exit()`], by segfaulting, or by
/// receiving a signal like `SIGINT`, then the temporary directory
/// will not be deleted.
///
/// # Examples
///
/// Create a temporary directory with a generated name:
///
/// ```
/// use std::fs::File;
/// use std::io::Write;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of `std::env::temp_dir()`
/// let tmp_dir = TempDir::new()?;
/// # Ok(())
/// # }
/// ```
///
/// Create a temporary directory with a prefix in its name:
///
/// ```
/// use std::fs::File;
/// use std::io::Write;
/// use tempfile::Builder;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of `std::env::temp_dir()`,
/// // whose name will begin with 'example'.
/// let tmp_dir = Builder::new().prefix("example").tempdir()?;
/// # Ok(())
/// # }
/// ```
///
/// [`Builder`]: struct.Builder.html
/// [`TempDir::close()`]: struct.TempDir.html#method.close
/// [`TempDir::new()`]: struct.TempDir.html#method.new
/// [`TempDir::path()`]: struct.TempDir.html#method.path
/// [`TempDir`]: struct.TempDir.html
pub struct TempDir {
path: Box<Path>,
}
impl TempDir {
/// Attempts to make a temporary directory inside of `env::temp_dir()`.
///
/// See [`Builder`] for more configuration.
///
/// The directory and everything inside it will be automatically deleted
/// once the returned `TempDir` is destroyed.
///
/// # Errors
///
/// If the directory can not be created, `Err` is returned.
///
/// # Examples
///
/// ```
/// use std::fs::File;
/// use std::io::Write;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of `std::env::temp_dir()`
/// let tmp_dir = TempDir::new()?;
///
/// let file_path = tmp_dir.path().join("my-temporary-note.txt");
/// let mut tmp_file = File::create(file_path)?;
/// writeln!(tmp_file, "Brian was here. Briefly.")?;
///
/// // `tmp_dir` goes out of scope, the directory as well as
/// // `tmp_file` will be deleted here.
/// # Ok(())
/// # }
/// ```
///
/// [`Builder`]: struct.Builder.html
pub fn new() -> io::Result<TempDir> {
Builder::new().tempdir()
}
/// Attempts to make a temporary directory inside of `dir`.
/// The directory and everything inside it will be automatically
/// deleted once the returned `TempDir` is destroyed.
///
/// # Errors
///
/// If the directory can not be created, `Err` is returned.
///
/// # Examples
///
/// ```
/// use std::fs::{self, File};
/// use std::io::Write;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of the current directory
/// let tmp_dir = TempDir::new_in(".")?;
/// let file_path = tmp_dir.path().join("my-temporary-note.txt");
/// let mut tmp_file = File::create(file_path)?;
/// writeln!(tmp_file, "Brian was here. Briefly.")?;
/// # Ok(())
/// # }
/// ```
pub fn new_in<P: AsRef<Path>>(dir: P) -> io::Result<TempDir> {
Builder::new().tempdir_in(dir)
}
/// Attempts to make a temporary directory with the specified prefix inside of
/// `env::temp_dir()`. The directory and everything inside it will be automatically
/// deleted once the returned `TempDir` is destroyed.
///
/// # Errors
///
/// If the directory can not be created, `Err` is returned.
///
/// # Examples
///
/// ```
/// use std::fs::{self, File};
/// use std::io::Write;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of the current directory
/// let tmp_dir = TempDir::with_prefix("foo-")?;
/// let tmp_name = tmp_dir.path().file_name().unwrap().to_str().unwrap();
/// assert!(tmp_name.starts_with("foo-"));
/// # Ok(())
/// # }
/// ```
pub fn with_prefix<S: AsRef<OsStr>>(prefix: S) -> io::Result<TempDir> {
Builder::new().prefix(&prefix).tempdir()
}
/// Attempts to make a temporary directory with the specified prefix inside
/// the specified directory. The directory and everything inside it will be
/// automatically deleted once the returned `TempDir` is destroyed.
///
/// # Errors
///
/// If the directory can not be created, `Err` is returned.
///
/// # Examples
///
/// ```
/// use std::fs::{self, File};
/// use std::io::Write;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of the current directory
/// let tmp_dir = TempDir::with_prefix_in("foo-", ".")?;
/// let tmp_name = tmp_dir.path().file_name().unwrap().to_str().unwrap();
/// assert!(tmp_name.starts_with("foo-"));
/// # Ok(())
/// # }
/// ```
pub fn with_prefix_in<S: AsRef<OsStr>, P: AsRef<Path>>(
prefix: S,
dir: P,
) -> io::Result<TempDir> {
Builder::new().prefix(&prefix).tempdir_in(dir)
}
/// Accesses the [`Path`] to the temporary directory.
///
///
/// # Examples
///
/// ```
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// let tmp_path;
///
/// {
/// let tmp_dir = TempDir::new()?;
/// tmp_path = tmp_dir.path().to_owned();
///
/// // Check that the temp directory actually exists.
/// assert!(tmp_path.exists());
///
/// // End of `tmp_dir` scope, directory will be deleted
/// }
///
/// // Temp directory should be deleted by now
/// assert_eq!(tmp_path.exists(), false);
/// # Ok(())
/// # }
/// ```
#[must_use]
pub fn path(&self) -> &path::Path {
self.path.as_ref()
}
/// Persist the temporary directory to disk, returning the [`PathBuf`] where it is located.
///
/// This consumes the [`TempDir`] without deleting directory on the filesystem, meaning that
/// the directory will no longer be automatically deleted.
///
/// [`TempDir`]: struct.TempDir.html
///
/// # Examples
///
/// ```
/// use std::fs;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// let tmp_dir = TempDir::new()?;
///
/// // Persist the temporary directory to disk,
/// // getting the path where it is.
/// let tmp_path = tmp_dir.into_path();
///
/// // Delete the temporary directory ourselves.
/// fs::remove_dir_all(tmp_path)?;
/// # Ok(())
/// # }
/// ```
#[must_use]
pub fn into_path(self) -> PathBuf {
// Prevent the Drop impl from being called.
let mut this = mem::ManuallyDrop::new(self);
// replace this.path with an empty Box, since an empty Box does not
// allocate any heap memory.
mem::replace(&mut this.path, PathBuf::new().into_boxed_path()).into()
}
/// Closes and removes the temporary directory, returning a `Result`.
///
/// Although `TempDir` removes the directory on drop, in the destructor
/// any errors are ignored. To detect errors cleaning up the temporary
/// directory, call `close` instead.
///
/// # Errors
///
/// This function may return a variety of [`std::io::Error`]s that result from deleting
/// the files and directories contained with the temporary directory,
/// as well as from deleting the temporary directory itself. These errors
/// may be platform specific.
///
///
/// # Examples
///
/// ```
/// use std::fs::File;
/// use std::io::Write;
/// use tempfile::TempDir;
///
/// # use std::io;
/// # fn run() -> Result<(), io::Error> {
/// // Create a directory inside of `std::env::temp_dir()`.
/// let tmp_dir = TempDir::new()?;
/// let file_path = tmp_dir.path().join("my-temporary-note.txt");
/// let mut tmp_file = File::create(file_path)?;
/// writeln!(tmp_file, "Brian was here. Briefly.")?;
///
/// // By closing the `TempDir` explicitly we can check that it has
/// // been deleted successfully. If we don't close it explicitly,
/// // the directory will still be deleted when `tmp_dir` goes out
/// // of scope, but we won't know whether deleting the directory
/// // succeeded.
/// drop(tmp_file);
/// tmp_dir.close()?;
/// # Ok(())
/// # }
/// ```
pub fn close(mut self) -> io::Result<()> {
let result = remove_dir_all(self.path()).with_err_path(|| self.path());
// Set self.path to empty Box to release the memory, since an empty
// Box does not allocate any heap memory.
self.path = PathBuf::new().into_boxed_path();
// Prevent the Drop impl from being called.
mem::forget(self);
result
}
}
impl AsRef<Path> for TempDir {
fn as_ref(&self) -> &Path {
self.path()
}
}
impl fmt::Debug for TempDir {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("TempDir")
.field("path", &self.path())
.finish()
}
}
impl Drop for TempDir {
fn drop(&mut self) {
let _ = remove_dir_all(self.path());
}
}
pub(crate) fn create(path: PathBuf) -> io::Result<TempDir> {
fs::create_dir(&path)
.with_err_path(|| &path)
.map(|_| TempDir {
path: path.into_boxed_path(),
})
}