# frozen_string_literal: true
##
# This module contains various utility methods as module methods.
module Gem::Util
@silent_mutex = nil
##
# Zlib::GzipReader wrapper that unzips +data+.
def self.gunzip(data)
require 'zlib'
require 'stringio'
data = StringIO.new(data, 'r')
gzip_reader = begin
Zlib::GzipReader.new(data)
rescue Zlib::GzipFile::Error => e
raise e.class, e.inspect, e.backtrace
end
unzipped = gzip_reader.read
unzipped.force_encoding Encoding::BINARY
unzipped
end
##
# Zlib::GzipWriter wrapper that zips +data+.
def self.gzip(data)
require 'zlib'
require 'stringio'
zipped = StringIO.new(String.new, 'w')
zipped.set_encoding Encoding::BINARY
Zlib::GzipWriter.wrap zipped do |io|
io.write data
end
zipped.string
end
##
# A Zlib::Inflate#inflate wrapper
def self.inflate(data)
require 'zlib'
Zlib::Inflate.inflate data
end
##
# This calls IO.popen and reads the result
def self.popen(*command)
IO.popen command, &:read
end
##
# Invokes system, but silences all output.
def self.silent_system(*command)
opt = {:out => IO::NULL, :err => [:child, :out]}
if Hash === command.last
opt.update(command.last)
cmds = command[0...-1]
else
cmds = command.dup
end
system(*(cmds << opt))
end
##
# Enumerates the parents of +directory+.
def self.traverse_parents(directory, &block)
return enum_for __method__, directory unless block_given?
here = File.expand_path directory
loop do
Dir.chdir here, &block rescue Errno::EACCES
new_here = File.expand_path('..', here)
return if new_here == here # toplevel
here = new_here
end
end
##
# Globs for files matching +pattern+ inside of +directory+,
# returning absolute paths to the matching files.
def self.glob_files_in_dir(glob, base_path)
if RUBY_VERSION >= "2.5"
Dir.glob(glob, base: base_path).map! {|f| File.expand_path(f, base_path) }
else
Dir.glob(File.expand_path(glob, base_path))
end
end
##
# Corrects +path+ (usually returned by `URI.parse().path` on Windows), that
# comes with a leading slash.
def self.correct_for_windows_path(path)
if path[0].chr == '/' && path[1].chr =~ /[a-z]/i && path[2].chr == ':'
path[1..-1]
else
path
end
end
end
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