[−][src]Trait filesystem::FileSystem

pub trait FileSystem {
    type DirEntry: DirEntry;
    type ReadDir: ReadDir<Self::DirEntry>;
    fn current_dir(&self) -> Result<PathBuf>;

    fn set_current_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>;

    fn is_dir<P: AsRef<Path>>(&self, path: P) -> bool;

    fn is_file<P: AsRef<Path>>(&self, path: P) -> bool;

    fn create_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>;

    fn create_dir_all<P: AsRef<Path>>(&self, path: P) -> Result<()>;

    fn remove_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>;

    fn remove_dir_all<P: AsRef<Path>>(&self, path: P) -> Result<()>;

    fn read_dir<P: AsRef<Path>>(&self, path: P) -> Result<Self::ReadDir>;

    fn create_file<P, B>(&self, path: P, buf: B) -> Result<()>
    where
        P: AsRef<Path>,
        B: AsRef<[u8]>;

    fn write_file<P, B>(&self, path: P, buf: B) -> Result<()>
    where
        P: AsRef<Path>,
        B: AsRef<[u8]>;

    fn overwrite_file<P, B>(&self, path: P, buf: B) -> Result<()>
    where
        P: AsRef<Path>,
        B: AsRef<[u8]>;

    fn read_file<P: AsRef<Path>>(&self, path: P) -> Result<Vec<u8>>;

    fn read_file_to_string<P: AsRef<Path>>(&self, path: P) -> Result<String>;

    fn read_file_into<P, B>(&self, path: P, buf: B) -> Result<usize>
    where
        P: AsRef<Path>,
        B: AsMut<Vec<u8>>;

    fn remove_file<P: AsRef<Path>>(&self, path: P) -> Result<()>;

    fn copy_file<P, Q>(&self, from: P, to: Q) -> Result<()>
    where
        P: AsRef<Path>,
        Q: AsRef<Path>;

    fn rename<P, Q>(&self, from: P, to: Q) -> Result<()>
    where
        P: AsRef<Path>,
        Q: AsRef<Path>;

    fn readonly<P: AsRef<Path>>(&self, path: P) -> Result<bool>;

    fn set_readonly<P: AsRef<Path>>(
        &self, 
        path: P, 
        readonly: bool
    ) -> Result<()>;

    fn len<P: AsRef<Path>>(&self, path: P) -> u64;
}

Provides standard file system operations.

Associated Types

type DirEntry: DirEntry

type ReadDir: ReadDir<Self::DirEntry>

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Required methods

fn current_dir(&self) -> Result<PathBuf>

Returns the current working directory. This is based on std::env::current_dir.

fn set_current_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>

Updates the current working directory. This is based on std::env::set_current_dir.

fn is_dir<P: AsRef<Path>>(&self, path: P) -> bool

Determines whether the path exists and points to a directory.

fn is_file<P: AsRef<Path>>(&self, path: P) -> bool

Determines whether the path exists and points to a file.

fn create_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>

Creates a new directory. This is based on std::fs::create_dir.

fn create_dir_all<P: AsRef<Path>>(&self, path: P) -> Result<()>

Recursively creates a directory and any missing parents. This is based on std::fs::create_dir.

fn remove_dir<P: AsRef<Path>>(&self, path: P) -> Result<()>

Removes an empty directory. This is based on std::fs::remove_dir.

fn remove_dir_all<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.

fn read_dir<P: AsRef<Path>>(&self, path: P) -> Result<Self::ReadDir>

Returns an iterator over the entries in a directory. This is based on std::fs::read_dir.

fn create_file<P, B>(&self, path: P, buf: B) -> Result<()> where
    P: AsRef<Path>,
    B: AsRef<[u8]>, 

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 write_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 overwrite_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 read_file<P: AsRef<Path>>(&self, path: P) -> Result<Vec<u8>>

Returns the contents of path.

Errors

  • path does not exist.
  • path is a directory.
  • Current user has insufficient permissions.

fn read_file_to_string<P: AsRef<Path>>(&self, path: P) -> Result<String>

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_into<P, B>(&self, path: P, buf: B) -> Result<usize> where
    P: AsRef<Path>,
    B: AsMut<Vec<u8>>, 

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 remove_file<P: AsRef<Path>>(&self, path: P) -> Result<()>

Removes the file at path. This is based on std::fs::remove_file.

fn copy_file<P, Q>(&self, from: P, to: Q) -> Result<()> where
    P: AsRef<Path>,
    Q: AsRef<Path>, 

Copies the file at path from to the path to. This is based on std::fs::copy.

fn rename<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.

fn readonly<P: AsRef<Path>>(&self, path: P) -> Result<bool>

Returns true if path is a readonly file.

Errors

  • path does not exist.
  • Current user has insufficient permissions.

fn set_readonly<P: AsRef<Path>>(&self, path: P, readonly: bool) -> Result<()>

Sets or unsets the readonly flag of path.

Errors

  • path does not exist.
  • Current user has insufficient permissions.

fn len<P: AsRef<Path>>(&self, path: P) -> u64

Returns the length of the node at the path or 0 if the node does not exist.

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Implementors

impl FileSystem for FakeFileSystem[src]

type DirEntry = DirEntry

type ReadDir = ReadDir

impl FileSystem for OsFileSystem[src]

type DirEntry = DirEntry

type ReadDir = ReadDir

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