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#![deny(warnings, intra_doc_link_resolution_failure)] #![deny(clippy::all, clippy::pedantic)] use std::ffi::OsString; use std::io::Result; use std::path::{Path, PathBuf}; pub use crate::fake::FakeTempDir; pub use crate::fake::FileSystem as FakeFileSystem; mod fake; /// Provides standard file system operations. pub trait FileSystem { type DirEntry: DirEntry; type ReadDir: ReadDir<Self::DirEntry>; type Metadata: Clone; /// 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>; /// Writes the contents of `path` into the buffer. If successful, returns /// the number of bytes that were read. /// /// # Errors /// /// * `path` does not exist. /// * `path` is a directory. /// * Current user has insufficient permissions. fn read_file_into<P, B>(&self, path: P, buf: B) -> Result<usize> where P: AsRef<Path>, B: AsMut<Vec<u8>>; /// 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; /// Read metadata of `path`. /// /// If `path` does not exist, return None. If `path` is a directory, return /// None. If `path` has no metadata, return None. fn metadata<P: AsRef<Path>>(&self, path: P) -> Option<Self::Metadata>; /// Set metadata of `path`. /// /// # Errors /// /// * `path` does not exist. /// * `path` is not a file. fn set_metadata<P: AsRef<Path>>(&self, path: P, metadata: Self::Metadata) -> Result<()>; } 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<()>; } /// 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; } 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>> {}