Filesystem

Base.Filesystem.pwd — Function.

pwd() -> AbstractString

Get the current working directory.

Examples

julia> pwd()
"/home/JuliaUser"
julia> cd("/home/JuliaUser/Projects/julia")
julia> pwd()
"/home/JuliaUser/Projects/julia"

source

Base.Filesystem.cd — Method.

cd(dir::AbstractString=homedir())

Set the current working directory.

Examples

julia> cd("/home/JuliaUser/Projects/julia")
julia> pwd()
"/home/JuliaUser/Projects/julia"
julia> cd()
julia> pwd()
"/home/JuliaUser"

source

Base.Filesystem.cd — Method.

cd(f::Function, dir::AbstractString=homedir())

Temporarily change the current working directory to dir, apply function f and finally return to the original directory.

Examples

julia> pwd()
"/home/JuliaUser"
julia> cd(readdir, "/home/JuliaUser/Projects/julia")
34-element Array{String,1}:
 ".circleci"
 ".freebsdci.sh"
 ".git"
 ".gitattributes"
 ".github"
 ⋮
 "test"
 "ui"
 "usr"
 "usr-staging"
julia> pwd()
"/home/JuliaUser"

source

Base.Filesystem.readdir — Function.

readdir(dir::AbstractString=".") -> Vector{String}

Return the files and directories in the directory dir (or the current working directory if not given).

Examples

julia> readdir("/home/JuliaUser/Projects/julia")
34-element Array{String,1}:
 ".circleci"
 ".freebsdci.sh"
 ".git"
 ".gitattributes"
 ".github"
 ⋮
 "test"
 "ui"
 "usr"
 "usr-staging"

source

Base.Filesystem.walkdir — Function.

walkdir(dir; topdown=true, follow_symlinks=false, onerror=throw)

Return an iterator that walks the directory tree of a directory. The iterator returns a tuple containing (rootpath, dirs, files). The directory tree can be traversed top-down or bottom-up. If walkdir encounters a SystemError it will rethrow the error by default. A custom error handling function can be provided through onerror keyword argument. onerror is called with a SystemError as argument.

Examples

for (root, dirs, files) in walkdir(".")
    println("Directories in $root")
    for dir in dirs
        println(joinpath(root, dir)) # path to directories
    end
    println("Files in $root")
    for file in files
        println(joinpath(root, file)) # path to files
    end
end

julia> mkpath("my/test/dir");
julia> itr = walkdir("my");
julia> (root, dirs, files) = first(itr)
("my", ["test"], String[])
julia> (root, dirs, files) = first(itr)
("my/test", ["dir"], String[])
julia> (root, dirs, files) = first(itr)
("my/test/dir", String[], String[])

source

Base.Filesystem.mkdir — Function.

mkdir(path::AbstractString; mode::Unsigned = 0o777)

Make a new directory with name path and permissions mode. mode defaults to 0o777, modified by the current file creation mask. This function never creates more than one directory. If the directory already exists, or some intermediate directories do not exist, this function throws an error. See mkpath for a function which creates all required intermediate directories. Return path.

Examples

julia> mkdir("testingdir")
"testingdir"
julia> cd("testingdir")
julia> pwd()
"/home/JuliaUser/testingdir"

source

Base.Filesystem.mkpath — Function.

mkpath(path::AbstractString; mode::Unsigned = 0o777)

Create all directories in the given path, with permissions mode. mode defaults to 0o777, modified by the current file creation mask. Return path.

Examples

julia> mkdir("testingdir")
"testingdir"
julia> cd("testingdir")
julia> pwd()
"/home/JuliaUser/testingdir"
julia> mkpath("my/test/dir")
"my/test/dir"
julia> readdir()
1-element Array{String,1}:
 "my"
julia> cd("my")
julia> readdir()
1-element Array{String,1}:
 "test"
julia> readdir("test")
1-element Array{String,1}:
 "dir"

source

Base.Filesystem.symlink — Function.

symlink(target::AbstractString, link::AbstractString)

Creates a symbolic link to target with the name link.

Note

This function raises an error under operating systems that do not support soft symbolic links, such as Windows XP.

source

Base.Filesystem.readlink — Function.

readlink(path::AbstractString) -> AbstractString

Return the target location a symbolic link path points to.

source

Base.Filesystem.chmod — Function.

chmod(path::AbstractString, mode::Integer; recursive::Bool=false)

Change the permissions mode of path to mode. Only integer modes (e.g. 0o777) are currently supported. If recursive=true and the path is a directory all permissions in that directory will be recursively changed. Return path.

source

Base.Filesystem.chown — Function.

chown(path::AbstractString, owner::Integer, group::Integer=-1)

Change the owner and/or group of path to owner and/or group. If the value entered for owner or group is -1 the corresponding ID will not change. Only integer owners and groups are currently supported. Return path.

source

Base.Libc.RawFD — Type.

RawFD

Primitive type which wraps the native OS file descriptor. RawFDs can be passed to methods like stat to discover information about the underlying file, and can also be used to open streams, with the RawFD describing the OS file backing the stream.

source

Base.stat — Function.

stat(file)

Returns a structure whose fields contain information about the file. The fields of the structure are:

source

Base.Filesystem.lstat — Function.

lstat(file)

Like stat, but for symbolic links gets the info for the link itself rather than the file it refers to. This function must be called on a file path rather than a file object or a file descriptor.

source

Base.Filesystem.ctime — Function.

ctime(file)

Equivalent to stat(file).ctime.

source

Base.Filesystem.mtime — Function.

mtime(file)

Equivalent to stat(file).mtime.

source

Base.Filesystem.filemode — Function.

filemode(file)

Equivalent to stat(file).mode.

source

Base.Filesystem.filesize — Function.

filesize(path...)

Equivalent to stat(file).size.

source

Base.Filesystem.uperm — Function.

uperm(file)

Get the permissions of the owner of the file as a bitfield of

For allowed arguments, see stat.

source

Base.Filesystem.gperm — Function.

gperm(file)

Like uperm but gets the permissions of the group owning the file.

source

Base.Filesystem.operm — Function.

operm(file)

Like uperm but gets the permissions for people who neither own the file nor are a member of the group owning the file

source

Base.Filesystem.cp — Function.

cp(src::AbstractString, dst::AbstractString; force::Bool=false, follow_symlinks::Bool=false)

Copy the file, link, or directory from src to dst. force=true will first remove an existing dst.

If follow_symlinks=false, and src is a symbolic link, dst will be created as a symbolic link. If follow_symlinks=true and src is a symbolic link, dst will be a copy of the file or directory src refers to. Return dst.

source

Base.download — Function.

download(url::AbstractString, [localfile::AbstractString])

Download a file from the given url, optionally renaming it to the given local file name. If no filename is given this will download into a randomly-named file in your temp directory. Note that this function relies on the availability of external tools such as curl, wget or fetch to download the file and is provided for convenience. For production use or situations in which more options are needed, please use a package that provides the desired functionality instead.

Returns the filename of the downloaded file.

source

Base.Filesystem.mv — Function.

mv(src::AbstractString, dst::AbstractString; force::Bool=false)

Move the file, link, or directory from src to dst. force=true will first remove an existing dst. Return dst.

Examples

julia> write("hello.txt", "world");
julia> mv("hello.txt", "goodbye.txt")
"goodbye.txt"
julia> "hello.txt" in readdir()
false
julia> readline("goodbye.txt")
"world"
julia> write("hello.txt", "world2");
julia> mv("hello.txt", "goodbye.txt")
ERROR: ArgumentError: 'goodbye.txt' exists. `force=true` is required to remove 'goodbye.txt' before moving.
Stacktrace:
 [1] #checkfor_mv_cp_cptree#10(::Bool, ::Function, ::String, ::String, ::String) at ./file.jl:293
[...]
julia> mv("hello.txt", "goodbye.txt", force=true)
"goodbye.txt"
julia> rm("goodbye.txt");

source

Base.Filesystem.rm — Function.

rm(path::AbstractString; force::Bool=false, recursive::Bool=false)

Delete the file, link, or empty directory at the given path. If force=true is passed, a non-existing path is not treated as error. If recursive=true is passed and the path is a directory, then all contents are removed recursively.

Examples

julia> mkpath("my/test/dir");
julia> rm("my", recursive=true)
julia> rm("this_file_does_not_exist", force=true)
julia> rm("this_file_does_not_exist")
ERROR: IOError: unlink: no such file or directory (ENOENT)
Stacktrace:
[...]

source

Base.Filesystem.touch — Function.

touch(path::AbstractString)

Update the last-modified timestamp on a file to the current time. Return path.

Examples

julia> write("my_little_file", 2);
julia> mtime("my_little_file")
1.5273815391135583e9
julia> touch("my_little_file");
julia> mtime("my_little_file")
1.527381559163435e9

We can see the mtime has been modified by touch.

source

Base.Filesystem.tempname — Function.

tempname()

Generate a temporary file path. This function only returns a path; no file is created. The path is likely to be unique, but this cannot be guaranteed.

Warning

This can lead to race conditions if another process obtains the same file name and creates the file before you are able to. Using mktemp() is recommended instead.

source

Base.Filesystem.tempdir — Function.

tempdir()

Obtain the path of a temporary directory (possibly shared with other processes).

source

Base.Filesystem.mktemp — Method.

mktemp(parent=tempdir())

Return (path, io), where path is the path of a new temporary file in parent and io is an open file object for this path.

source

Base.Filesystem.mktemp — Method.

mktemp(f::Function, parent=tempdir())

Apply the function f to the result of mktemp(parent) and remove the temporary file upon completion.

source

Base.Filesystem.mktempdir — Method.

mktempdir(parent=tempdir())

Create a temporary directory in the parent directory and return its path. If parent does not exist, throw an error.

source

Base.Filesystem.mktempdir — Method.

mktempdir(f::Function, parent=tempdir())

Apply the function f to the result of mktempdir(parent) and remove the temporary directory upon completion.

source

Base.Filesystem.isblockdev — Function.

isblockdev(path) -> Bool

Return true if path is a block device, false otherwise.

source

Base.Filesystem.ischardev — Function.

ischardev(path) -> Bool

Return true if path is a character device, false otherwise.

source

Base.Filesystem.isdir — Function.

isdir(path) -> Bool

Return true if path is a directory, false otherwise.

Examples

julia> isdir(homedir())
true
julia> isdir("not/a/directory")
false

source

Base.Filesystem.isfifo — Function.

isfifo(path) -> Bool

Return true if path is a FIFO, false otherwise.

source

Base.Filesystem.isfile — Function.

isfile(path) -> Bool

Return true if path is a regular file, false otherwise.

Examples

julia> isfile(homedir())
false
julia> f = open("test_file.txt", "w");
julia> isfile(f)
true
julia> close(f); rm("test_file.txt")

source

Base.Filesystem.islink — Function.

islink(path) -> Bool

Return true if path is a symbolic link, false otherwise.

source

Base.Filesystem.ismount — Function.

ismount(path) -> Bool

Return true if path is a mount point, false otherwise.

source

Base.Filesystem.ispath — Function.

ispath(path) -> Bool

Return true if path is a valid filesystem path, false otherwise.

source

Base.Filesystem.issetgid — Function.

issetgid(path) -> Bool

Return true if path has the setgid flag set, false otherwise.

source

Base.Filesystem.issetuid — Function.

issetuid(path) -> Bool

Return true if path has the setuid flag set, false otherwise.

source

Base.Filesystem.issocket — Function.

issocket(path) -> Bool

Return true if path is a socket, false otherwise.

source

Base.Filesystem.issticky — Function.

issticky(path) -> Bool

Return true if path has the sticky bit set, false otherwise.

source

Base.Filesystem.homedir — Function.

homedir() -> AbstractString

Return the current user’s home directory.

Note

homedir determines the home directory via libuv‘s uv_os_homedir. For details (for example on how to specify the home directory via environment variables), see the uv_os_homedir documentation.

source

Base.Filesystem.dirname — Function.

dirname(path::AbstractString) -> AbstractString

Get the directory part of a path.

Examples

julia> dirname("/home/myuser")
"/home"

See also: basename

source

Base.Filesystem.basename — Function.

basename(path::AbstractString) -> AbstractString

Get the file name part of a path.

Examples

julia> basename("/home/myuser/example.jl")
"example.jl"

See also: dirname

source

Base.@__FILE__ — Macro.

@__FILE__ -> AbstractString

Expand to a string with the path to the file containing the macrocall, or an empty string if evaluated by julia -e <expr>. Return nothing if the macro was missing parser source information. Alternatively see PROGRAM_FILE.

source

Base.@__DIR__ — Macro.

@__DIR__ -> AbstractString

Expand to a string with the absolute path to the directory of the file containing the macrocall. Return the current working directory if run from a REPL or if evaluated by julia -e <expr>.

source

Base.@__LINE__ — Macro.

@__LINE__ -> Int

Expand to the line number of the location of the macrocall. Return 0 if the line number could not be determined.

source

Base.Filesystem.isabspath — Function.

isabspath(path::AbstractString) -> Bool

Determine whether a path is absolute (begins at the root directory).

Examples

julia> isabspath("/home")
true
julia> isabspath("home")
false

source

Base.Filesystem.isdirpath — Function.

isdirpath(path::AbstractString) -> Bool

Determine whether a path refers to a directory (for example, ends with a path separator).

Examples

julia> isdirpath("/home")
false
julia> isdirpath("/home/")
true

source

Base.Filesystem.joinpath — Function.

joinpath(parts...) -> AbstractString

Join path components into a full path. If some argument is an absolute path or (on Windows) has a drive specification that doesn’t match the drive computed for the join of the preceding paths, then prior components are dropped.

Examples

julia> joinpath("/home/myuser", "example.jl")
"/home/myuser/example.jl"

source

Base.Filesystem.abspath — Function.

abspath(path::AbstractString) -> AbstractString

Convert a path to an absolute path by adding the current directory if necessary. Also normalizes the path as in normpath.

source

abspath(path::AbstractString, paths::AbstractString...) -> AbstractString

Convert a set of paths to an absolute path by joining them together and adding the current directory if necessary. Equivalent to abspath(joinpath(path, paths...)).

source

Base.Filesystem.normpath — Function.

normpath(path::AbstractString) -> AbstractString

Normalize a path, removing “.” and “..” entries.

Examples

julia> normpath("/home/myuser/../example.jl")
"/home/example.jl"

source

Base.Filesystem.realpath — Function.

realpath(path::AbstractString) -> AbstractString

Canonicalize a path by expanding symbolic links and removing “.” and “..” entries.

source

Base.Filesystem.relpath — Function.

relpath(path::AbstractString, startpath::AbstractString = ".") -> AbstractString

Return a relative filepath to path either from the current directory or from an optional start directory. This is a path computation: the filesystem is not accessed to confirm the existence or nature of path or startpath.

source

Base.Filesystem.expanduser — Function.

expanduser(path::AbstractString) -> AbstractString

On Unix systems, replace a tilde character at the start of a path with the current user’s home directory.

source

Base.Filesystem.splitdir — Function.

splitdir(path::AbstractString) -> (AbstractString, AbstractString)

Split a path into a tuple of the directory name and file name.

Examples

julia> splitdir("/home/myuser")
("/home", "myuser")

source

Base.Filesystem.splitdrive — Function.

splitdrive(path::AbstractString) -> (AbstractString, AbstractString)

On Windows, split a path into the drive letter part and the path part. On Unix systems, the first component is always the empty string.

source

Base.Filesystem.splitext — Function.

splitext(path::AbstractString) -> (AbstractString, AbstractString)

If the last component of a path contains a dot, split the path into everything before the dot and everything including and after the dot. Otherwise, return a tuple of the argument unmodified and the empty string.

Examples

julia> splitext("/home/myuser/example.jl")
("/home/myuser/example", ".jl")
julia> splitext("/home/myuser/example")
("/home/myuser/example", "")

source

Base.Filesystem.splitpath — Function.

splitpath(path::AbstractString) -> Vector{String}

Split a file path into all its path components. This is the opposite of joinpath. Returns an array of substrings, one for each directory or file in the path, including the root directory if present.

Julia 1.1

This function requires at least Julia 1.1.

Examples

julia> splitpath("/home/myuser/example.jl")
4-element Array{String,1}:
 "/"
 "home"
 "myuser"
 "example.jl"

source