class Tempfile
Overview
The Tempfile
class is for managing temporary files.
Every tempfile is operated as a File
, including
initializing, reading and writing.
tempfile = Tempfile.new("foo")
# or
tempfile = Tempfile.open("foo") { |file|
file.print("foobar")
}
File.size(tempfile.path) # => 6
File.stat(tempfile.path).mtime # => 2015-10-20 13:11:12 UTC
File.exists?(tempfile.path) # => true
File.read_lines(tempfile.path) # => ["foobar"]
Files created from this class are stored in a directory that handles temporary files.
Tempfile.new("foo").path # => "/tmp/foo.ulBCPS"
Also, it is encouraged to delete a tempfile after using it, which ensures they are not left behind in your filesystem until garbage collected.
tempfile = Tempfile.new("foo")
tempfile.unlink
Defined in:
tempfile.crClass Method Summary
-
.dirname : String
Returns the tmp dir used for tempfile
` Tempfile.dirname # => "/tmp"
`
-
.new(name)
Creates a
Tempfile
with the given filename. -
.open(filename, &block)
Creates a file with filename, and yields it to the given block.
Instance Method Summary
-
#delete
Deletes this tempfile.
-
#path : String
Retrieves the full path of a this tempfile.
-
#unlink
Deletes this tempfile.
Instance methods inherited from class IO::FileDescriptor
blocking
blocking,
blocking=(value)
blocking=,
close_on_exec=(arg : Bool)
close_on_exec=,
close_on_exec?
close_on_exec?,
closed? : Bool
closed?,
cooked(&block)
cooked,
cooked!
cooked!,
fcntl(cmd, arg = 0)
fcntl,
fd : Int32
fd,
finalize
finalize,
inspect(io)
inspect,
noecho(&block)
noecho,
noecho!
noecho!,
pos
pos,
pos=(value)
pos=,
raw(&block)
raw,
raw!
raw!,
read_timeout=(read_timeout : Time::Span)read_timeout=(read_timeout : Number)
read_timeout=(read_timeout : Nil) read_timeout=, reopen(other : IO::FileDescriptor) reopen, seek(offset, whence : Seek = Seek::Set) seek, stat stat, tell tell, tty? tty?, write_timed_out : Bool write_timed_out, write_timed_out=(write_timed_out : Bool) write_timed_out=, write_timeout=(write_timeout : Number)
write_timeout=(write_timeout : Nil)
write_timeout=(write_timeout : Time::Span) write_timeout=
Class methods inherited from class IO::FileDescriptor
fcntl(fd, cmd, arg = 0)
fcntl,
new(fd : Int32, blocking = false, edge_triggerable = false)
new
Instance methods inherited from module IO::Buffered
close
close,
flush
flush,
flush_on_newline=(flush_on_newline)
flush_on_newline=,
flush_on_newline?
flush_on_newline?,
read(slice : Slice(UInt8))
read,
rewind
rewind,
sync=(sync)
sync=,
sync?
sync?,
unbuffered_close
unbuffered_close,
unbuffered_flush
unbuffered_flush,
unbuffered_read(slice : Slice(UInt8))
unbuffered_read,
unbuffered_rewind
unbuffered_rewind,
unbuffered_write(slice : Slice(UInt8))
unbuffered_write,
write(slice : Slice(UInt8))
write
Instance methods inherited from module IO
<<(obj) : self
<<,
close
close,
closed?
closed?,
each_byte(&block)each_byte each_byte, each_char(&block)
each_char each_char, each_line(*args, **options)
each_line(*args, **options, &block) each_line, encoding : String encoding, flush flush, gets(limit : Int) : String | Nil
gets(delimiter : Char, limit : Int) : String | Nil
gets(delimiter : Char) : String | Nil
gets : String | Nil
gets(delimiter : String) : String | Nil gets, gets_to_end : String gets_to_end, print(obj) : Nil
print(*objects : _) : Nil print, printf(format_string, *args) : Nil
printf(format_string, args : Array | Tuple) : Nil printf, puts(*objects : _) : Nil
puts : Nil
puts(string : String) : Nil
puts(obj) : Nil puts, read(slice : Slice(UInt8)) read, read_byte : UInt8 | Nil read_byte, read_bytes(type, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) read_bytes, read_char : Char | Nil read_char, read_fully(slice : Slice(UInt8)) read_fully, read_line(*args, **options) : String | Nil read_line, read_utf8(slice : Slice(UInt8)) read_utf8, read_utf8_byte read_utf8_byte, rewind rewind, set_encoding(encoding : String, invalid : Symbol | Nil = nil) set_encoding, skip(bytes_count : Int) : Nil skip, tty? : Bool tty?, write(slice : Slice(UInt8)) : Nil write, write_byte(byte : UInt8) write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) write_bytes, write_utf8(slice : Slice(UInt8)) write_utf8
Class methods inherited from module IO
copy(src, dst, limit : Int)copy(src, dst) copy, pipe(read_blocking = false, write_blocking = false, &block)
pipe(read_blocking = false, write_blocking = false) pipe, select(read_ios, write_ios, error_ios, timeout_sec : LibC::TimeT | Int | Float | Nil)
select(read_ios, write_ios = nil, error_ios = nil) select
Instance methods inherited from module JSON::Builder
json_array(&block)
json_array,
json_object(&block)
json_object
Instance methods inherited from class Reference
==(other)==(other : self) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s
Instance methods inherited from class Object
!=(other)
!=,
!~(other)
!~,
==(other)
==,
===(other)===(other : YAML::Any)
===(other : JSON::Any) ===, =~(other) =~, class class, crystal_type_id crystal_type_id, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml
to_yaml(io : IO) to_yaml, try(&block) try
Class methods inherited from class Object
==(other : Class)
==,
===(other)
===,
cast(other) : self
cast,
clone
clone,
dup
dup,
from_json(string_or_io) : selffrom_json(string_or_io, root : String) : self from_json, from_yaml(string : String) : self from_yaml, hash hash, inspect(io) inspect, name : String name, nilable? nilable?, to_s(io) to_s, |(other : U.class) forall U |
Class Method Detail
Returns the tmp dir used for tempfile
Tempfile.dirname # => "/tmp"
Creates a file with filename, and yields it to the given block. It is closed and returned at the end of this method call.
tempfile = Tempfile.open("foo") { |file|
file.print("bar")
}
File.read(tempfile.path) # => "bar"
Instance Method Detail
Retrieves the full path of a this tempfile.
Tempfile.new("foo").path # => "/tmp/foo.ulBCPS"