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#[cfg(any(feature = "mock", test))]
extern crate pseudo;
#[cfg(feature = "temp")]
extern crate rand;
#[cfg(feature = "temp")]
extern crate tempdir;
use std::ffi::OsString;
use std::io::Result;
use std::path::{Path, PathBuf};
#[cfg(feature = "fake")]
pub use fake::{FakeFileSystem, FakeTempDir};
#[cfg(any(feature = "mock", test))]
pub use mock::{FakeError, MockFileSystem};
pub use os::OsFileSystem;
#[cfg(feature = "temp")]
pub use os::OsTempDir;
#[cfg(feature = "fake")]
mod fake;
#[cfg(any(feature = "mock", test))]
mod mock;
mod os;
/// Provides standard file system operations.
pub trait FileSystem {
type DirEntry: DirEntry;
type ReadDir: ReadDir<Self::DirEntry>;
/// Returns the current working directory.
/// This is based on [`std::env::current_dir`].
///
/// [`std::env::current_dir`]: https://doc.rust-lang.org/std/env/fn.current_dir.html
fn current_dir(&self) -> Result<PathBuf>;
/// Updates the current working directory.
/// This is based on [`std::env::set_current_dir`].
///
/// [`std::env::set_current_dir`]: https://doc.rust-lang.org/std/env/fn.set_current_dir.html
fn set_current_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>;
/// Determines whether the path exists and points to a directory.
fn is_dir<P: AsRef<Path>>(&self, path: P) -> bool;
/// Determines whether the path exists and points to a file.
fn is_file<P: AsRef<Path>>(&self, path: P) -> bool;
/// Creates a new directory.
/// This is based on [`std::fs::create_dir`].
///
/// [`std::fs::create_dir`]: https://doc.rust-lang.org/std/fs/fn.create_dir.html
fn create_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>;
/// Recursively creates a directory and any missing parents.
/// This is based on [`std::fs::create_dir`].
///
/// [`std::fs::create_dir_all`]: https://doc.rust-lang.org/std/fs/fn.create_dir_all.html
fn create_dir_all<P: AsRef<Path>>(&self, path: P) -> Result<()>;
/// Removes an empty directory.
/// This is based on [`std::fs::remove_dir`].
///
/// [`std::fs::remove_dir`]: https://doc.rust-lang.org/std/fs/fn.remove_dir.html
fn remove_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>;
/// Removes a directory and any child files or directories.
/// This is based on [`std::fs::remove_dir_all`].
///
/// [`std::fs::remove_dir_all`]: https://doc.rust-lang.org/std/fs/fn.remove_dir_all.html
fn remove_dir_all<P: AsRef<Path>>(&self, path: P) -> Result<()>;
/// Returns an iterator over the entries in a directory.
/// This is based on [`std::fs::read_dir`].
///
/// [`std::fs::read_dir`]: https://doc.rust-lang.org/std/fs/fn.read_dir.html
fn read_dir<P: AsRef<Path>>(&self, path: P) -> Result<Self::ReadDir>;
/// Writes `buf` to a new file at `path`.
///
/// # Errors
///
/// * A file or directory already exists at `path`.
/// * The parent directory of `path` does not exist.
/// * Current user has insufficient permissions.
fn create_file<P, B>(&self, path: P, buf: B) -> Result<()>
where
P: AsRef<Path>,
B: AsRef<[u8]>;
/// Writes `buf` to a new or existing file at `buf`.
/// This will overwrite any contents that already exist.
///
/// # Errors
///
/// * The parent directory of `path` does not exist.
/// * Current user has insufficient permissions.
fn write_file<P, B>(&self, path: P, buf: B) -> Result<()>
where
P: AsRef<Path>,
B: AsRef<[u8]>;
/// Writes `buf` to an existing file at `buf`.
/// This will overwrite any contents that already exist.
///
/// # Errors
///
/// * No file `file` does not exist.
/// * The node at `file` is a directory.
/// * Current user has insufficient permissions.
fn overwrite_file<P, B>(&self, path: P, buf: B) -> Result<()>
where
P: AsRef<Path>,
B: AsRef<[u8]>;
/// Returns the contents of `path`.
///
/// # Errors
///
/// * `path` does not exist.
/// * `path` is a directory.
/// * Current user has insufficient permissions.
fn read_file<P: AsRef<Path>>(&self, path: P) -> Result<Vec<u8>>;
/// Returns the contents of `path` as a string.
///
/// # Errors
///
/// * `path` does not exist.
/// * `path` is a directory.
/// * Current user has insufficient permissions.
/// * Contents are not valid UTF-8
fn read_file_to_string<P: AsRef<Path>>(&self, path: P) -> Result<String>;
/// Removes the file at `path`.
/// This is based on [`std::fs::remove_file`].
///
/// [`std::fs::remove_file`]: https://doc.rust-lang.org/std/fs/fn.remove_file.html
fn remove_file<P: AsRef<Path>>(&self, path: P) -> Result<()>;
/// Copies the file at path `from` to the path `to`.
/// This is based on [`std::fs::copy`].
///
/// [`std::fs::copy`]: https://doc.rust-lang.org/std/fs/fn.copy.html
fn copy_file<P, Q>(&self, from: P, to: Q) -> Result<()>
where
P: AsRef<Path>,
Q: AsRef<Path>;
/// Renames a file or directory.
/// If both `from` and `to` are files, `to` will be replaced.
/// Based on [`std::fs::rename`].
///
/// [`std::fs::rename`]: https://doc.rust-lang.org/std/fs/fn.rename.html
fn rename<P, Q>(&self, from: P, to: Q) -> Result<()>
where
P: AsRef<Path>,
Q: AsRef<Path>;
/// Returns `true` if `path` is a readonly file.
///
/// # Errors
///
/// * `path` does not exist.
/// * Current user has insufficient permissions.
fn readonly<P: AsRef<Path>>(&self, path: P) -> Result<bool>;
/// Sets or unsets the readonly flag of `path`.
///
/// # Errors
///
/// * `path` does not exist.
/// * Current user has insufficient permissions.
fn set_readonly<P: AsRef<Path>>(&self, path: P, readonly: bool) -> Result<()>;
/// Returns the length of the node at the path
/// or 0 if the node does not exist.
fn len<P: AsRef<Path>>(&self, path: P) -> u64;
}
#[cfg(unix)]
pub trait UnixFileSystem {
/// Returns the current mode bits of `path`.
///
/// # Errors
///
/// * `path` does not exist.
/// * Current user has insufficient permissions.
fn mode<P: AsRef<Path>>(&self, path: P) -> Result<u32>;
/// Sets the mode bits of `path`.
///
/// # Errors
///
/// * `path` does not exist.
/// * Current user has insufficient permissions.
fn set_mode<P: AsRef<Path>>(&self, path: P, mode: u32) -> Result<()>;
}
#[cfg(feature = "temp")]
/// Tracks a temporary directory that will be deleted once the struct goes out of scope.
pub trait TempDir {
/// Returns the [`Path`] of the temporary directory.
///
/// [`Path`]: https://doc.rust-lang.org/std/path/struct.Path.html
fn path(&self) -> &Path;
}
#[cfg(feature = "temp")]
pub trait TempFileSystem {
type TempDir: TempDir;
/// Creates a new temporary directory.
fn temp_dir<S: AsRef<str>>(&self, prefix: S) -> Result<Self::TempDir>;
}
pub trait DirEntry {
fn file_name(&self) -> OsString;
fn path(&self) -> PathBuf;
}
pub trait ReadDir<T: DirEntry>: Iterator<Item = Result<T>> {}