https://github.com/JuliaLang/julia
Tip revision: 4608aba7aef2b3ca52c6d2cb82be38379543fd17 authored by Kristoffer on 03 May 2023, 13:58:41 UTC
add tracy support for inc/dec plots
add tracy support for inc/dec plots
Tip revision: 4608aba
file.jl
# This file is a part of Julia. License is MIT: https://julialang.org/license
# Operations with the file system (paths) ##
export
cd,
chmod,
chown,
cp,
cptree,
diskstat,
hardlink,
mkdir,
mkpath,
mktemp,
mktempdir,
mv,
pwd,
rename,
readlink,
readdir,
rm,
samefile,
sendfile,
symlink,
tempdir,
tempname,
touch,
unlink,
walkdir
# get and set current directory
"""
pwd() -> String
Get the current working directory.
See also: [`cd`](@ref), [`tempdir`](@ref).
# Examples
```julia-repl
julia> pwd()
"/home/JuliaUser"
julia> cd("/home/JuliaUser/Projects/julia")
julia> pwd()
"/home/JuliaUser/Projects/julia"
```
"""
function pwd()
buf = Base.StringVector(AVG_PATH - 1) # space for null-terminator implied by StringVector
sz = RefValue{Csize_t}(length(buf) + 1) # total buffer size including null
while true
rc = ccall(:uv_cwd, Cint, (Ptr{UInt8}, Ptr{Csize_t}), buf, sz)
if rc == 0
resize!(buf, sz[])
return String(buf)
elseif rc == Base.UV_ENOBUFS
resize!(buf, sz[] - 1) # space for null-terminator implied by StringVector
else
uv_error("pwd()", rc)
end
end
end
"""
cd(dir::AbstractString=homedir())
Set the current working directory.
See also: [`pwd`](@ref), [`mkdir`](@ref), [`mkpath`](@ref), [`mktempdir`](@ref).
# Examples
```julia-repl
julia> cd("/home/JuliaUser/Projects/julia")
julia> pwd()
"/home/JuliaUser/Projects/julia"
julia> cd()
julia> pwd()
"/home/JuliaUser"
```
"""
function cd(dir::AbstractString)
err = ccall(:uv_chdir, Cint, (Cstring,), dir)
err < 0 && uv_error("cd($(repr(dir)))", err)
return nothing
end
cd() = cd(homedir())
if Sys.iswindows()
function cd(f::Function, dir::AbstractString)
old = pwd()
try
cd(dir)
f()
finally
cd(old)
end
end
else
function cd(f::Function, dir::AbstractString)
fd = ccall(:open, Int32, (Cstring, Int32, UInt32...), :., 0)
systemerror(:open, fd == -1)
try
cd(dir)
f()
finally
systemerror(:fchdir, ccall(:fchdir, Int32, (Int32,), fd) != 0)
systemerror(:close, ccall(:close, Int32, (Int32,), fd) != 0)
end
end
end
"""
cd(f::Function, dir::AbstractString=homedir())
Temporarily change the current working directory to `dir`, apply function `f` and
finally return to the original directory.
# Examples
```julia-repl
julia> pwd()
"/home/JuliaUser"
julia> cd(readdir, "/home/JuliaUser/Projects/julia")
34-element Array{String,1}:
".circleci"
".freebsdci.sh"
".git"
".gitattributes"
".github"
⋮
"test"
"ui"
"usr"
"usr-staging"
julia> pwd()
"/home/JuliaUser"
```
"""
cd(f::Function) = cd(f, homedir())
function checkmode(mode::Integer)
if !(0 <= mode <= 511)
throw(ArgumentError("Mode must be between 0 and 511 = 0o777"))
end
mode
end
"""
mkdir(path::AbstractString; mode::Unsigned = 0o777)
Make a new directory with name `path` and permissions `mode`. `mode` defaults to `0o777`,
modified by the current file creation mask. This function never creates more than one
directory. If the directory already exists, or some intermediate directories do not exist,
this function throws an error. See [`mkpath`](@ref) for a function which creates all
required intermediate directories.
Return `path`.
# Examples
```julia-repl
julia> mkdir("testingdir")
"testingdir"
julia> cd("testingdir")
julia> pwd()
"/home/JuliaUser/testingdir"
```
"""
function mkdir(path::AbstractString; mode::Integer = 0o777)
req = Libc.malloc(_sizeof_uv_fs)
try
ret = ccall(:uv_fs_mkdir, Cint,
(Ptr{Cvoid}, Ptr{Cvoid}, Cstring, Cint, Ptr{Cvoid}),
C_NULL, req, path, checkmode(mode), C_NULL)
if ret < 0
uv_fs_req_cleanup(req)
uv_error("mkdir($(repr(path)); mode=0o$(string(mode,base=8)))", ret)
end
uv_fs_req_cleanup(req)
return path
finally
Libc.free(req)
end
end
"""
mkpath(path::AbstractString; mode::Unsigned = 0o777)
Create all intermediate directories in the `path` as required. Directories are created with
the permissions `mode` which defaults to `0o777` and is modified by the current file
creation mask. Unlike [`mkdir`](@ref), `mkpath` does not error if `path` (or parts of it)
already exists. However, an error will be thrown if `path` (or parts of it) points to an
existing file. Return `path`.
If `path` includes a filename you will probably want to use `mkpath(dirname(path))` to
avoid creating a directory using the filename.
# Examples
```julia-repl
julia> cd(mktempdir())
julia> mkpath("my/test/dir") # creates three directories
"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"
julia> mkpath("intermediate_dir/actually_a_directory.txt") # creates two directories
"intermediate_dir/actually_a_directory.txt"
julia> isdir("intermediate_dir/actually_a_directory.txt")
true
```
"""
function mkpath(path::AbstractString; mode::Integer = 0o777)
isdirpath(path) && (path = dirname(path))
dir = dirname(path)
(path == dir || isdir(path)) && return path
mkpath(dir, mode = checkmode(mode))
try
mkdir(path, mode = mode)
catch err
# If there is a problem with making the directory, but the directory
# does in fact exist, then ignore the error. Else re-throw it.
if !isa(err, IOError) || !isdir(path)
rethrow()
end
end
path
end
"""
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
```jldoctest
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("this_file_does_not_exist"): no such file or directory (ENOENT)
Stacktrace:
[...]
```
"""
function rm(path::AbstractString; force::Bool=false, recursive::Bool=false)
if islink(path) || !isdir(path)
try
@static if Sys.iswindows()
# is writable on windows actually means "is deletable"
st = lstat(path)
if ispath(st) && (filemode(st) & 0o222) == 0
chmod(path, 0o777)
end
end
unlink(path)
catch err
if force && isa(err, IOError) && err.code==Base.UV_ENOENT
return
end
rethrow()
end
else
if recursive
try
for p in readdir(path)
rm(joinpath(path, p), force=force, recursive=true)
end
catch err
if !(isa(err, IOError) && err.code==Base.UV_EACCES)
rethrow(err)
end
end
end
req = Libc.malloc(_sizeof_uv_fs)
try
ret = ccall(:uv_fs_rmdir, Cint, (Ptr{Cvoid}, Ptr{Cvoid}, Cstring, Ptr{Cvoid}), C_NULL, req, path, C_NULL)
uv_fs_req_cleanup(req)
ret < 0 && uv_error("rm($(repr(path)))", ret)
nothing
finally
Libc.free(req)
end
end
end
# The following use Unix command line facilities
function checkfor_mv_cp_cptree(src::AbstractString, dst::AbstractString, txt::AbstractString;
force::Bool=false)
if ispath(dst)
if force
# Check for issue when: (src == dst) or when one is a link to the other
# https://github.com/JuliaLang/julia/pull/11172#issuecomment-100391076
if Base.samefile(src, dst)
abs_src = islink(src) ? abspath(readlink(src)) : abspath(src)
abs_dst = islink(dst) ? abspath(readlink(dst)) : abspath(dst)
throw(ArgumentError(string("'src' and 'dst' refer to the same file/dir. ",
"This is not supported.\n ",
"`src` refers to: $(abs_src)\n ",
"`dst` refers to: $(abs_dst)\n")))
end
rm(dst; recursive=true, force=true)
else
throw(ArgumentError(string("'$dst' exists. `force=true` ",
"is required to remove '$dst' before $(txt).")))
end
end
end
function cptree(src::String, dst::String; force::Bool=false,
follow_symlinks::Bool=false)
isdir(src) || throw(ArgumentError("'$src' is not a directory. Use `cp(src, dst)`"))
checkfor_mv_cp_cptree(src, dst, "copying"; force=force)
mkdir(dst)
for name in readdir(src)
srcname = joinpath(src, name)
if !follow_symlinks && islink(srcname)
symlink(readlink(srcname), joinpath(dst, name))
elseif isdir(srcname)
cptree(srcname, joinpath(dst, name); force=force,
follow_symlinks=follow_symlinks)
else
sendfile(srcname, joinpath(dst, name))
end
end
end
cptree(src::AbstractString, dst::AbstractString; kwargs...) =
cptree(String(src)::String, String(dst)::String; kwargs...)
"""
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`.
!!! note
The `cp` function is different from the `cp` command. The `cp` function always operates on
the assumption that `dst` is a file, while the command does different things depending
on whether `dst` is a directory or a file.
Using `force=true` when `dst` is a directory will result in loss of all the contents present
in the `dst` directory, and `dst` will become a file that has the contents of `src` instead.
"""
function cp(src::AbstractString, dst::AbstractString; force::Bool=false,
follow_symlinks::Bool=false)
checkfor_mv_cp_cptree(src, dst, "copying"; force=force)
if !follow_symlinks && islink(src)
symlink(readlink(src), dst)
elseif isdir(src)
cptree(src, dst; force=force, follow_symlinks=follow_symlinks)
else
sendfile(src, dst)
end
dst
end
"""
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
```jldoctest; filter = r"Stacktrace:(\\n \\[[0-9]+\\].*)*"
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");
```
"""
function mv(src::AbstractString, dst::AbstractString; force::Bool=false)
checkfor_mv_cp_cptree(src, dst, "moving"; force=force)
rename(src, dst)
dst
end
"""
touch(path::AbstractString)
touch(fd::File)
Update the last-modified timestamp on a file to the current time.
If the file does not exist a new file is created.
Return `path`.
# Examples
```julia-repl
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`](@ref) has been modified by `touch`.
"""
function touch(path::AbstractString)
f = open(path, JL_O_WRONLY | JL_O_CREAT, 0o0666)
try
touch(f)
finally
close(f)
end
path
end
"""
tempdir()
Gets the path of the temporary directory. On Windows, `tempdir()` uses the first environment
variable found in the ordered list `TMP`, `TEMP`, `USERPROFILE`. On all other operating
systems, `tempdir()` uses the first environment variable found in the ordered list `TMPDIR`,
`TMP`, `TEMP`, and `TEMPDIR`. If none of these are found, the path `"/tmp"` is used.
"""
function tempdir()
buf = Base.StringVector(AVG_PATH - 1) # space for null-terminator implied by StringVector
sz = RefValue{Csize_t}(length(buf) + 1) # total buffer size including null
while true
rc = ccall(:uv_os_tmpdir, Cint, (Ptr{UInt8}, Ptr{Csize_t}), buf, sz)
if rc == 0
resize!(buf, sz[])
return String(buf)
elseif rc == Base.UV_ENOBUFS
resize!(buf, sz[] - 1) # space for null-terminator implied by StringVector
else
uv_error("tempdir()", rc)
end
end
end
"""
prepare_for_deletion(path::AbstractString)
Prepares the given `path` for deletion by ensuring that all directories within that
`path` have write permissions, so that files can be removed from them. This is
automatically invoked by methods such as `mktempdir()` to ensure that no matter what
weird permissions a user may have created directories with within the temporary prefix,
it will always be deleted.
"""
function prepare_for_deletion(path::AbstractString)
# Nothing to do for non-directories
if !isdir(path)
return
end
try chmod(path, filemode(path) | 0o333)
catch; end
for (root, dirs, files) in walkdir(path; onerror=x->())
for dir in dirs
dpath = joinpath(root, dir)
try chmod(dpath, filemode(dpath) | 0o333)
catch; end
end
end
end
const TEMP_CLEANUP_MIN = Ref(1024)
const TEMP_CLEANUP_MAX = Ref(1024)
const TEMP_CLEANUP = Dict{String,Bool}()
const TEMP_CLEANUP_LOCK = ReentrantLock()
function temp_cleanup_later(path::AbstractString; asap::Bool=false)
lock(TEMP_CLEANUP_LOCK)
# each path should only be inserted here once, but if there
# is a collision, let !asap win over asap: if any user might
# still be using the path, don't delete it until process exit
TEMP_CLEANUP[path] = get(TEMP_CLEANUP, path, true) & asap
if length(TEMP_CLEANUP) > TEMP_CLEANUP_MAX[]
temp_cleanup_purge()
TEMP_CLEANUP_MAX[] = max(TEMP_CLEANUP_MIN[], 2*length(TEMP_CLEANUP))
end
unlock(TEMP_CLEANUP_LOCK)
return nothing
end
function temp_cleanup_purge(; force::Bool=false)
need_gc = Sys.iswindows()
for (path, asap) in TEMP_CLEANUP
try
if (force || asap) && ispath(path)
need_gc && GC.gc(true)
need_gc = false
prepare_for_deletion(path)
rm(path, recursive=true, force=true)
end
!ispath(path) && delete!(TEMP_CLEANUP, path)
catch ex
@warn """
Failed to clean up temporary path $(repr(path))
$ex
""" _group=:file
end
end
end
const temp_prefix = "jl_"
# Use `Libc.rand()` to generate random strings
function _rand_filename(len = 10)
slug = Base.StringVector(len)
chars = b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
for i = 1:len
slug[i] = chars[(Libc.rand() % length(chars)) + 1]
end
return String(slug)
end
# Obtain a temporary filename.
function tempname(parent::AbstractString=tempdir(); max_tries::Int = 100, cleanup::Bool=true)
isdir(parent) || throw(ArgumentError("$(repr(parent)) is not a directory"))
prefix = joinpath(parent, temp_prefix)
filename = nothing
for i in 1:max_tries
filename = string(prefix, _rand_filename())
if ispath(filename)
filename = nothing
else
break
end
end
if filename === nothing
error("tempname: max_tries exhausted")
end
cleanup && temp_cleanup_later(filename)
return filename
end
if Sys.iswindows()
# While this isn't a true analog of `mkstemp`, it _does_ create an
# empty file for us, ensuring that other simultaneous calls to
# `_win_mkstemp()` won't collide, so it's a better name for the
# function than `tempname()`.
function _win_mkstemp(temppath::AbstractString)
tempp = cwstring(temppath)
temppfx = cwstring(temp_prefix)
tname = Vector{UInt16}(undef, 32767)
uunique = ccall(:GetTempFileNameW, stdcall, UInt32,
(Ptr{UInt16}, Ptr{UInt16}, UInt32, Ptr{UInt16}),
tempp, temppfx, UInt32(0), tname)
windowserror("GetTempFileName", uunique == 0)
lentname = something(findfirst(iszero, tname))
@assert lentname > 0
resize!(tname, lentname - 1)
return transcode(String, tname)
end
function mktemp(parent::AbstractString=tempdir(); cleanup::Bool=true)
filename = _win_mkstemp(parent)
cleanup && temp_cleanup_later(filename)
return (filename, Base.open(filename, "r+"))
end
else # !windows
# Create and return the name of a temporary file along with an IOStream
function mktemp(parent::AbstractString=tempdir(); cleanup::Bool=true)
b = joinpath(parent, temp_prefix * "XXXXXX")
p = ccall(:mkstemp, Int32, (Cstring,), b) # modifies b
systemerror(:mktemp, p == -1)
cleanup && temp_cleanup_later(b)
return (b, fdio(p, true))
end
end # os-test
"""
tempname(parent=tempdir(); cleanup=true) -> String
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 due to
the very remote possibility of two simultaneous calls to `tempname` generating
the same file name. The name is guaranteed to differ from all files already
existing at the time of the call to `tempname`.
When called with no arguments, the temporary name will be an absolute path to a
temporary name in the system temporary directory as given by `tempdir()`. If a
`parent` directory argument is given, the temporary path will be in that
directory instead.
The `cleanup` option controls whether the process attempts to delete the
returned path automatically when the process exits. Note that the `tempname`
function does not create any file or directory at the returned location, so
there is nothing to cleanup unless you create a file or directory there. If
you do and `clean` is `true` it will be deleted upon process termination.
!!! compat "Julia 1.4"
The `parent` and `cleanup` arguments were added in 1.4. Prior to Julia 1.4
the path `tempname` would never be cleaned up at process termination.
!!! warning
This can lead to security holes if another process obtains the same
file name and creates the file before you are able to. Open the file with
`JL_O_EXCL` if this is a concern. Using [`mktemp()`](@ref) is also
recommended instead.
"""
tempname()
"""
mktemp(parent=tempdir(); cleanup=true) -> (path, io)
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. The `cleanup` option controls whether
the temporary file is automatically deleted when the process exits.
!!! compat "Julia 1.3"
The `cleanup` keyword argument was added in Julia 1.3. Relatedly, starting from 1.3,
Julia will remove the temporary paths created by `mktemp` when the Julia process exits,
unless `cleanup` is explicitly set to `false`.
"""
mktemp(parent)
"""
mktempdir(parent=tempdir(); prefix=$(repr(temp_prefix)), cleanup=true) -> path
Create a temporary directory in the `parent` directory with a name
constructed from the given `prefix` and a random suffix, and return its path.
Additionally, on some platforms, any trailing `'X'` characters in `prefix` may be replaced
with random characters.
If `parent` does not exist, throw an error. The `cleanup` option controls whether
the temporary directory is automatically deleted when the process exits.
!!! compat "Julia 1.2"
The `prefix` keyword argument was added in Julia 1.2.
!!! compat "Julia 1.3"
The `cleanup` keyword argument was added in Julia 1.3. Relatedly, starting from 1.3,
Julia will remove the temporary paths created by `mktempdir` when the Julia process
exits, unless `cleanup` is explicitly set to `false`.
See also: [`mktemp`](@ref), [`mkdir`](@ref).
"""
function mktempdir(parent::AbstractString=tempdir();
prefix::AbstractString=temp_prefix, cleanup::Bool=true)
if isempty(parent) || occursin(path_separator_re, parent[end:end])
# append a path_separator only if parent didn't already have one
tpath = "$(parent)$(prefix)XXXXXX"
else
tpath = "$(parent)$(path_separator)$(prefix)XXXXXX"
end
req = Libc.malloc(_sizeof_uv_fs)
try
ret = ccall(:uv_fs_mkdtemp, Cint,
(Ptr{Cvoid}, Ptr{Cvoid}, Cstring, Ptr{Cvoid}),
C_NULL, req, tpath, C_NULL)
if ret < 0
uv_fs_req_cleanup(req)
uv_error("mktempdir($(repr(parent)))", ret)
end
path = unsafe_string(ccall(:jl_uv_fs_t_path, Cstring, (Ptr{Cvoid},), req))
uv_fs_req_cleanup(req)
cleanup && temp_cleanup_later(path)
return path
finally
Libc.free(req)
end
end
"""
mktemp(f::Function, parent=tempdir())
Apply the function `f` to the result of [`mktemp(parent)`](@ref) and remove the
temporary file upon completion.
See also: [`mktempdir`](@ref).
"""
function mktemp(fn::Function, parent::AbstractString=tempdir())
(tmp_path, tmp_io) = mktemp(parent, cleanup=false)
try
fn(tmp_path, tmp_io)
finally
try
close(tmp_io)
ispath(tmp_path) && rm(tmp_path)
catch ex
@error "mktemp cleanup" _group=:file exception=(ex, catch_backtrace())
# might be possible to remove later
temp_cleanup_later(tmp_path, asap=true)
end
end
end
"""
mktempdir(f::Function, parent=tempdir(); prefix=$(repr(temp_prefix)))
Apply the function `f` to the result of [`mktempdir(parent; prefix)`](@ref) and remove the
temporary directory all of its contents upon completion.
See also: [`mktemp`](@ref), [`mkdir`](@ref).
!!! compat "Julia 1.2"
The `prefix` keyword argument was added in Julia 1.2.
"""
function mktempdir(fn::Function, parent::AbstractString=tempdir();
prefix::AbstractString=temp_prefix)
tmpdir = mktempdir(parent; prefix=prefix, cleanup=false)
try
fn(tmpdir)
finally
try
if ispath(tmpdir)
prepare_for_deletion(tmpdir)
rm(tmpdir, recursive=true)
end
catch ex
@error "mktempdir cleanup" _group=:file exception=(ex, catch_backtrace())
# might be possible to remove later
temp_cleanup_later(tmpdir, asap=true)
end
end
end
struct uv_dirent_t
name::Ptr{UInt8}
typ::Cint
end
"""
readdir(dir::AbstractString=pwd();
join::Bool = false,
sort::Bool = true,
) -> Vector{String}
Return the names in the directory `dir` or the current working directory if not
given. When `join` is false, `readdir` returns just the names in the directory
as is; when `join` is true, it returns `joinpath(dir, name)` for each `name` so
that the returned strings are full paths. If you want to get absolute paths
back, call `readdir` with an absolute directory path and `join` set to true.
By default, `readdir` sorts the list of names it returns. If you want to skip
sorting the names and get them in the order that the file system lists them,
you can use `readdir(dir, sort=false)` to opt out of sorting.
See also: [`walkdir`](@ref).
!!! compat "Julia 1.4"
The `join` and `sort` keyword arguments require at least Julia 1.4.
# Examples
```julia-repl
julia> cd("/home/JuliaUser/dev/julia")
julia> readdir()
30-element Array{String,1}:
".appveyor.yml"
".git"
".gitattributes"
⋮
"ui"
"usr"
"usr-staging"
julia> readdir(join=true)
30-element Array{String,1}:
"/home/JuliaUser/dev/julia/.appveyor.yml"
"/home/JuliaUser/dev/julia/.git"
"/home/JuliaUser/dev/julia/.gitattributes"
⋮
"/home/JuliaUser/dev/julia/ui"
"/home/JuliaUser/dev/julia/usr"
"/home/JuliaUser/dev/julia/usr-staging"
julia> readdir("base")
145-element Array{String,1}:
".gitignore"
"Base.jl"
"Enums.jl"
⋮
"version_git.sh"
"views.jl"
"weakkeydict.jl"
julia> readdir("base", join=true)
145-element Array{String,1}:
"base/.gitignore"
"base/Base.jl"
"base/Enums.jl"
⋮
"base/version_git.sh"
"base/views.jl"
"base/weakkeydict.jl"
julia> readdir(abspath("base"), join=true)
145-element Array{String,1}:
"/home/JuliaUser/dev/julia/base/.gitignore"
"/home/JuliaUser/dev/julia/base/Base.jl"
"/home/JuliaUser/dev/julia/base/Enums.jl"
⋮
"/home/JuliaUser/dev/julia/base/version_git.sh"
"/home/JuliaUser/dev/julia/base/views.jl"
"/home/JuliaUser/dev/julia/base/weakkeydict.jl"
```
"""
function readdir(dir::AbstractString; join::Bool=false, sort::Bool=true)
# Allocate space for uv_fs_t struct
req = Libc.malloc(_sizeof_uv_fs)
try
# defined in sys.c, to call uv_fs_readdir, which sets errno on error.
err = ccall(:uv_fs_scandir, Int32, (Ptr{Cvoid}, Ptr{Cvoid}, Cstring, Cint, Ptr{Cvoid}),
C_NULL, req, dir, 0, C_NULL)
err < 0 && uv_error("readdir($(repr(dir)))", err)
# iterate the listing into entries
entries = String[]
ent = Ref{uv_dirent_t}()
while Base.UV_EOF != ccall(:uv_fs_scandir_next, Cint, (Ptr{Cvoid}, Ptr{uv_dirent_t}), req, ent)
name = unsafe_string(ent[].name)
push!(entries, join ? joinpath(dir, name) : name)
end
# Clean up the request string
uv_fs_req_cleanup(req)
# sort entries unless opted out
sort && sort!(entries)
return entries
finally
Libc.free(req)
end
end
readdir(; join::Bool=false, sort::Bool=true) =
readdir(join ? pwd() : ".", join=join, sort=sort)
"""
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` or `stat` encounters a `IOError` it will rethrow the error by default.
A custom error handling function can be provided through `onerror` keyword argument.
`onerror` is called with a `IOError` as argument.
See also: [`readdir`](@ref).
# Examples
```julia
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-repl
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[])
```
"""
function walkdir(root; topdown=true, follow_symlinks=false, onerror=throw)
function _walkdir(chnl, root)
tryf(f, p) = try
f(p)
catch err
isa(err, IOError) || rethrow()
try
onerror(err)
catch err2
close(chnl, err2)
end
return
end
content = tryf(readdir, root)
content === nothing && return
dirs = Vector{eltype(content)}()
files = Vector{eltype(content)}()
for name in content
path = joinpath(root, name)
# If we're not following symlinks, then treat all symlinks as files
if (!follow_symlinks && something(tryf(islink, path), true)) || !something(tryf(isdir, path), false)
push!(files, name)
else
push!(dirs, name)
end
end
if topdown
push!(chnl, (root, dirs, files))
end
for dir in dirs
_walkdir(chnl, joinpath(root, dir))
end
if !topdown
push!(chnl, (root, dirs, files))
end
nothing
end
return Channel{Tuple{String,Vector{String},Vector{String}}}(chnl -> _walkdir(chnl, root))
end
function unlink(p::AbstractString)
err = ccall(:jl_fs_unlink, Int32, (Cstring,), p)
err < 0 && uv_error("unlink($(repr(p)))", err)
nothing
end
# For move command
function rename(src::AbstractString, dst::AbstractString; force::Bool=false)
err = ccall(:jl_fs_rename, Int32, (Cstring, Cstring), src, dst)
# on error, default to cp && rm
if err < 0
cp(src, dst; force=force, follow_symlinks=false)
rm(src; recursive=true)
end
nothing
end
function sendfile(src::AbstractString, dst::AbstractString)
src_open = false
dst_open = false
local src_file, dst_file
try
src_file = open(src, JL_O_RDONLY)
src_open = true
dst_file = open(dst, JL_O_CREAT | JL_O_TRUNC | JL_O_WRONLY, filemode(src_file))
dst_open = true
bytes = filesize(stat(src_file))
sendfile(dst_file, src_file, Int64(0), Int(bytes))
finally
if src_open && isopen(src_file)
close(src_file)
end
if dst_open && isopen(dst_file)
close(dst_file)
end
end
end
if Sys.iswindows()
const UV_FS_SYMLINK_DIR = 0x0001
const UV_FS_SYMLINK_JUNCTION = 0x0002
const UV__EPERM = -4048
end
"""
hardlink(src::AbstractString, dst::AbstractString)
Creates a hard link to an existing source file `src` with the name `dst`. The
destination, `dst`, must not exist.
See also: [`symlink`](@ref).
!!! compat "Julia 1.8"
This method was added in Julia 1.8.
"""
function hardlink(src::AbstractString, dst::AbstractString)
err = ccall(:jl_fs_hardlink, Int32, (Cstring, Cstring), src, dst)
if err < 0
msg = "hardlink($(repr(src)), $(repr(dst)))"
uv_error(msg, err)
end
return nothing
end
"""
symlink(target::AbstractString, link::AbstractString; dir_target = false)
Creates a symbolic link to `target` with the name `link`.
On Windows, symlinks must be explicitly declared as referring to a directory
or not. If `target` already exists, by default the type of `link` will be auto-
detected, however if `target` does not exist, this function defaults to creating
a file symlink unless `dir_target` is set to `true`. Note that if the user
sets `dir_target` but `target` exists and is a file, a directory symlink will
still be created, but dereferencing the symlink will fail, just as if the user
creates a file symlink (by calling `symlink()` with `dir_target` set to `false`
before the directory is created) and tries to dereference it to a directory.
Additionally, there are two methods of making a link on Windows; symbolic links
and junction points. Junction points are slightly more efficient, but do not
support relative paths, so if a relative directory symlink is requested (as
denoted by `isabspath(target)` returning `false`) a symlink will be used, else
a junction point will be used. Best practice for creating symlinks on Windows
is to create them only after the files/directories they reference are already
created.
See also: [`hardlink`](@ref).
!!! note
This function raises an error under operating systems that do not support
soft symbolic links, such as Windows XP.
!!! compat "Julia 1.6"
The `dir_target` keyword argument was added in Julia 1.6. Prior to this,
symlinks to nonexistent paths on windows would always be file symlinks, and
relative symlinks to directories were not supported.
"""
function symlink(target::AbstractString, link::AbstractString;
dir_target::Bool = false)
@static if Sys.iswindows()
if Sys.windows_version() < Sys.WINDOWS_VISTA_VER
error("Windows XP does not support soft symlinks")
end
end
flags = 0
@static if Sys.iswindows()
# If we're going to create a directory link, we need to know beforehand.
# First, if `target` is not an absolute path, let's immediately resolve
# it so that we can peek and see if it's a directory.
resolved_target = target
if !isabspath(target)
resolved_target = joinpath(dirname(link), target)
end
# If it is a directory (or `dir_target` is set), we'll need to add one
# of `UV_FS_SYMLINK_{DIR,JUNCTION}` to the flags, depending on whether
# `target` is an absolute path or not.
if (ispath(resolved_target) && isdir(resolved_target)) || dir_target
if isabspath(target)
flags |= UV_FS_SYMLINK_JUNCTION
else
flags |= UV_FS_SYMLINK_DIR
end
end
end
err = ccall(:jl_fs_symlink, Int32, (Cstring, Cstring, Cint), target, link, flags)
if err < 0
msg = "symlink($(repr(target)), $(repr(link)))"
@static if Sys.iswindows()
# creating file/directory symlinks requires Administrator privileges
# while junction points apparently do not
if flags & UV_FS_SYMLINK_JUNCTION == 0 && err == UV__EPERM
msg = "On Windows, creating symlinks requires Administrator privileges.\n$msg"
end
end
uv_error(msg, err)
end
return nothing
end
"""
readlink(path::AbstractString) -> String
Return the target location a symbolic link `path` points to.
"""
function readlink(path::AbstractString)
req = Libc.malloc(_sizeof_uv_fs)
try
ret = ccall(:uv_fs_readlink, Int32,
(Ptr{Cvoid}, Ptr{Cvoid}, Cstring, Ptr{Cvoid}),
C_NULL, req, path, C_NULL)
if ret < 0
uv_fs_req_cleanup(req)
uv_error("readlink($(repr(path)))", ret)
@assert false
end
tgt = unsafe_string(ccall(:jl_uv_fs_t_ptr, Cstring, (Ptr{Cvoid},), req))
uv_fs_req_cleanup(req)
return tgt
finally
Libc.free(req)
end
end
"""
chmod(path::AbstractString, mode::Integer; recursive::Bool=false)
Change the permissions mode of `path` to `mode`. Only integer `mode`s (e.g. `0o777`) are
currently supported. If `recursive=true` and the path is a directory all permissions in
that directory will be recursively changed.
Return `path`.
!!! note
Prior to Julia 1.6, this did not correctly manipulate filesystem ACLs
on Windows, therefore it would only set read-only bits on files. It
now is able to manipulate ACLs.
"""
function chmod(path::AbstractString, mode::Integer; recursive::Bool=false)
err = ccall(:jl_fs_chmod, Int32, (Cstring, Cint), path, mode)
err < 0 && uv_error("chmod($(repr(path)), 0o$(string(mode, base=8)))", err)
if recursive && isdir(path)
for p in readdir(path)
if !islink(joinpath(path, p))
chmod(joinpath(path, p), mode, recursive=true)
end
end
end
path
end
"""
chown(path::AbstractString, owner::Integer, group::Integer=-1)
Change the owner and/or group of `path` to `owner` and/or `group`. If the value entered for `owner` or `group`
is `-1` the corresponding ID will not change. Only integer `owner`s and `group`s are currently supported.
Return `path`.
"""
function chown(path::AbstractString, owner::Integer, group::Integer=-1)
err = ccall(:jl_fs_chown, Int32, (Cstring, Cint, Cint), path, owner, group)
err < 0 && uv_error("chown($(repr(path)), $owner, $group)", err)
path
end
# - http://docs.libuv.org/en/v1.x/fs.html#c.uv_fs_statfs (libuv function docs)
# - http://docs.libuv.org/en/v1.x/fs.html#c.uv_statfs_t (libuv docs of the returned struct)
"""
DiskStat
Stores information about the disk in bytes. Populate by calling `diskstat`.
"""
struct DiskStat
ftype::UInt64
bsize::UInt64
blocks::UInt64
bfree::UInt64
bavail::UInt64
files::UInt64
ffree::UInt64
fspare::NTuple{4, UInt64} # reserved
end
function Base.getproperty(stats::DiskStat, field::Symbol)
total = Int64(getfield(stats, :bsize) * getfield(stats, :blocks))
available = Int64(getfield(stats, :bsize) * getfield(stats, :bavail))
field === :total && return total
field === :available && return available
field === :used && return total - available
return getfield(stats, field)
end
@eval Base.propertynames(stats::DiskStat) =
$((fieldnames(DiskStat)[1:end-1]..., :available, :total, :used))
Base.show(io::IO, x::DiskStat) =
print(io, "DiskStat(total=$(x.total), used=$(x.used), available=$(x.available))")
"""
diskstat(path=pwd())
Returns statistics in bytes about the disk that contains the file or directory pointed at by
`path`. If no argument is passed, statistics about the disk that contains the current
working directory are returned.
!!! compat "Julia 1.8"
This method was added in Julia 1.8.
"""
function diskstat(path::AbstractString=pwd())
req = zeros(UInt8, _sizeof_uv_fs)
err = ccall(:uv_fs_statfs, Cint, (Ptr{Cvoid}, Ptr{Cvoid}, Cstring, Ptr{Cvoid}),
C_NULL, req, path, C_NULL)
err < 0 && uv_error("diskstat($(repr(path)))", err)
statfs_ptr = ccall(:jl_uv_fs_t_ptr, Ptr{Nothing}, (Ptr{Cvoid},), req)
return unsafe_load(reinterpret(Ptr{DiskStat}, statfs_ptr))
end