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Size: 1.12 KB
Versions: 23
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Stored size: 1.12 KB
Contents
require 'zlib'
COMPRESSORS = {
".gz" => "gzip",
".xz" => "xz",
".bz2" => "bzip2"
}
#
# A mutation of "open" that lets you read/write gzip files, as well as
# regular files.
#
# (NOTE: gzip detection is based on the filename, not the contents.)
#
# It accepts a block just like open()!
#
# Example:
# zopen("test.txt") #=> #<File:test.txt>
# zopen("test.txt.gz") #=> #<Zlib::GzipReader:0xb6c79424>
# zopen("otherfile.gz", "w") #=> #<Zlib::GzipWriter:0x7fe30448>>
# zopen("test.txt.gz") { |f| f.read } # read the contents of the .gz file, then close the file handle automatically.
#
def zopen(path, mode="rb")
ext = File.extname(path).downcase
if ext == ".gz"
io = open(path, mode)
case mode
when "r", "rb"
io = Zlib::GzipReader.new(io)
when "w", "wb"
io = Zlib::GzipWriter.new(io)
else
raise "Unknown mode: #{mode.inspect}. zopen only supports 'r' and 'w'."
end
elsif bin = COMPRESSORS[ext]
io = IO.popen([bin, "-d" ,"-c", path])
else
io = open(path)
end
if block_given?
result = yield(io)
io.close
result
else
io
end
end
Version data entries
23 entries across 23 versions & 1 rubygems