// Copyright 2015 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // 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, io};
usecrate::error::IoResultExt; usecrate::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 pubfn 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 pubfn 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(()) /// # } /// ``` /// /// [`File`]: http://doc.rust-lang.org/std/fs/struct.File.html /// [`Path`]: http://doc.rust-lang.org/std/path/struct.Path.html /// [`ReadDir`]: http://doc.rust-lang.org/std/fs/struct.ReadDir.html /// [`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 /// [`std::env::temp_dir()`]: https://doc.rust-lang.org/std/env/fn.temp_dir.html /// [`std::fs`]: http://doc.rust-lang.org/std/fs/index.html /// [`std::process::exit()`]: http://doc.rust-lang.org/std/process/fn.exit.html pubstruct 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 pubfn 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(()) /// # } /// ``` pubfn 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(()) /// # } /// ``` pubfn 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(()) /// # } /// ``` pubfn 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. /// /// [`Path`]: http://doc.rust-lang.org/std/path/struct.Path.html /// /// # 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] pubfn 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 /// [`PathBuf`]: http://doc.rust-lang.org/std/path/struct.PathBuf.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] pubfn into_path(self) -> PathBuf { // Prevent the Drop impl from being called. letmut 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. /// /// [`std::io::Error`]: http://doc.rust-lang.org/std/io/struct.Error.html /// /// # 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(()) /// # } /// ``` pubfn close(mutself) -> 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);
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