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file_utils.cr
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file_utils.cr
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module FileUtils
extend self
# Changes the current working directory of the process to the given string *path*.
#
# ```
# require "file_utils"
#
# FileUtils.cd("/tmp")
# ```
#
# NOTE: Alias of `Dir.cd`
def cd(path : String)
Dir.cd(path)
end
# Changes the current working directory of the process to the given string *path*
# and invoked the block, restoring the original working directory when the block exits.
#
# ```
# FileUtils.cd("/tmp") { Dir.current } # => "/tmp"
# ```
#
# NOTE: Alias of `Dir.cd` with block
def cd(path : String)
Dir.cd(path) { yield }
end
# Compares two files *filename1* to *filename2* to determine if they are identical.
# Returns `true` if content are the same, `false` otherwise.
#
# ```
# File.write("file.cr", "1")
# File.write("bar.cr", "1")
# FileUtils.cmp("file.cr", "bar.cr") # => true
# ```
def cmp(filename1 : String, filename2 : String)
return false unless File.size(filename1) == File.size(filename2)
File.open(filename1, "rb") do |file1|
File.open(filename2, "rb") do |file2|
cmp(file1, file2)
end
end
end
# Compares two streams *stream1* to *stream2* to determine if they are identical.
# Returns `true` if content are the same, `false` otherwise.
#
# ```
# File.write("afile", "123")
# stream1 = File.open("afile")
# stream2 = IO::Memory.new("123")
# FileUtils.cmp(stream1, stream2) # => true
# ```
def cmp(stream1 : IO, stream2 : IO)
buf1 = uninitialized UInt8[1024]
buf2 = uninitialized UInt8[1024]
while true
read1 = stream1.read(buf1.to_slice)
read2 = stream2.read_fully?(buf2.to_slice[0, read1])
return false unless read2
return false if buf1.to_unsafe.memcmp(buf2.to_unsafe, read1) != 0
return true if read1 == 0
end
end
# Attempts to set the access and modification times of the file named
# in the *path* parameter to the value given in *time*.
#
# If the file does not exist, it will be created.
#
# ```
# FileUtils.touch("afile.cr")
# ```
#
# NOTE: Alias of `File.touch`
def touch(path : String, time : Time = Time.now)
File.touch(path, time)
end
# Attempts to set the access and modification times of each file given
# in the *paths* parameter to the value given in *time*.
#
# If the file does not exist, it will be created.
#
# ```
# FileUtils.touch(["foo", "bar"])
# ```
def touch(paths : Enumerable(String), time : Time = Time.now)
paths.each do |path|
touch(path, time)
end
end
# Copies the file *src_path* to the file or directory *dest*.
# If *dest* is a directory, a file with the same basename as *src_path* is created in *dest*
# Permission bits are copied too.
#
# ```
# File.chmod("afile", 0o600)
# FileUtils.cp("afile", "afile_copy")
# File.stat("afile_copy").perm # => 0o600
# ```
def cp(src_path : String, dest : String)
File.open(src_path) do |s|
dest += File::SEPARATOR + File.basename(src_path) if Dir.exists?(dest)
File.open(dest, "wb", s.stat.mode) do |d|
IO.copy(s, d)
end
end
end
# Copies a list of files *src* to *dest*.
# *dest* must be an existing directory.
#
# ```
# Dir.mkdir("files")
# FileUtils.cp({"bar.cr", "afile"}, "files")
# ```
def cp(srcs : Enumerable(String), dest : String)
raise ArgumentError.new("No such directory : #{dest}") unless Dir.exists?(dest)
srcs.each do |src|
cp(src, dest)
end
end
# Copies a file or directory *src_path* to *dest_path*.
# If *src_path* is a directory, this method copies all its contents recursively.
#
# ```
# FileUtils.cp_r("files", "dir")
# ```
def cp_r(src_path : String, dest_path : String)
if Dir.exists?(src_path)
Dir.mkdir(dest_path)
Dir.each_child(src_path) do |entry|
src = File.join(src_path, entry)
dest = File.join(dest_path, entry)
cp_r(src, dest)
end
else
cp(src_path, dest_path)
end
end
# Creates a new directory at the given *path*. The linux-style permission *mode*
# can be specified, with a default of 777 (0o777).
#
# ```
# FileUtils.mkdir("src")
# ```
#
# NOTE: Alias of `Dir.mkdir`
def mkdir(path : String, mode = 0o777) : Nil
Dir.mkdir(path, mode)
end
# Creates a new directory at the given *paths*. The linux-style permission *mode*
# can be specified, with a default of 777 (0o777).
#
# ```
# FileUtils.mkdir(["foo", "bar"])
# ```
def mkdir(paths : Enumerable(String), mode = 0o777) : Nil
paths.each do |path|
Dir.mkdir(path, mode)
end
end
# Creates a new directory at the given *path*, including any non-existing
# intermediate directories. The linux-style permission *mode* can be specified,
# with a default of 777 (0o777).
#
# ```
# FileUtils.mkdir_p("foo")
# ```
#
# NOTE: Alias of `Dir.mkdir_p`
def mkdir_p(path : String, mode = 0o777) : Nil
Dir.mkdir_p(path, mode)
end
# Creates a new directory at the given *paths*, including any non-existing
# intermediate directories. The linux-style permission *mode* can be specified,
# with a default of 777 (0o777).
#
# ```
# FileUtils.mkdir_p(["foo", "bar", "baz", "dir1", "dir2", "dir3"])
# ```
def mkdir_p(paths : Enumerable(String), mode = 0o777) : Nil
paths.each do |path|
Dir.mkdir_p(path, mode)
end
end
# Moves *src_path* to *dest_path*.
#
# ```
# FileUtils.mv("afile", "afile.cr")
# ```
#
# NOTE: Alias of `File.rename`
def mv(src_path : String, dest_path : String) : Nil
File.rename(src_path, dest_path)
end
# Moves every *srcs* to *dest*.
#
# ```
# FileUtils.mv(["foo", "bar"], "src")
# ```
def mv(srcs : Enumerable(String), dest : String) : Nil
raise ArgumentError.new("No such directory : #{dest}") unless Dir.exists?(dest)
srcs.each do |src|
begin
mv(src, File.join(dest, File.basename(src)))
rescue Errno
end
end
end
# Returns the current working directory.
#
# ```
# FileUtils.pwd
# ```
#
# NOTE: Alias of `Dir.current`
def pwd : String
Dir.current
end
# Deletes the *path* file given.
#
# ```
# FileUtils.rm("afile.cr")
# ```
#
# NOTE: Alias of `File.delete`
def rm(path : String) : Nil
File.delete(path)
end
# Deletes all *paths* file given.
#
# ```
# FileUtils.rm(["dir/afile", "afile_copy"])
# ```
def rm(paths : Enumerable(String)) : Nil
paths.each do |path|
File.delete(path)
end
end
# Deletes a file or directory *path*.
# If *path* is a directory, this method removes all its contents recursively.
#
# ```
# FileUtils.rm_r("dir")
# FileUtils.rm_r("file.cr")
# ```
def rm_r(path : String) : Nil
if Dir.exists?(path) && !File.symlink?(path)
Dir.each_child(path) do |entry|
src = File.join(path, entry)
rm_r(src)
end
Dir.rmdir(path)
else
File.delete(path)
end
end
# Deletes a list of files or directories *paths*.
# If one path is a directory, this method removes all its contents recursively.
#
# ```
# FileUtils.rm_r(["files", "bar.cr"])
# ```
def rm_r(paths : Enumerable(String)) : Nil
paths.each do |path|
rm_r(path)
end
end
# Deletes a file or directory *path*.
# If *path* is a directory, this method removes all its contents recursively.
# Ignore all errors.
#
# ```
# FileUtils.rm_rf("dir")
# FileUtils.rm_rf("file.cr")
# FileUtils.rm_rf("non_existent_file")
# ```
def rm_rf(path : String) : Nil
begin
rm_r(path)
rescue Errno
end
end
# Deletes a list of files or directories *paths*.
# If one path is a directory, this method removes all its contents recursively.
# Ignore all errors.
#
# ```
# FileUtils.rm_rf(["dir", "file.cr", "non_existent_file"])
# ```
def rm_rf(paths : Enumerable(String)) : Nil
paths.each do |path|
begin
rm_r(path)
rescue Errno
end
end
end
# Removes the directory at the given *path*.
#
# ```
# FileUtils.rmdir("baz")
# ```
#
# NOTE: Alias of `Dir.rmdir`
def rmdir(path : String) : Nil
Dir.rmdir(path)
end
# Removes all directories at the given *paths*.
#
# ```
# FileUtils.rmdir(["dir1", "dir2", "dir3"])
# ```
def rmdir(paths : Enumerable(String)) : Nil
paths.each do |path|
Dir.rmdir(path)
end
end
end