class FreeDiskSpace

# File lib/free_disk_space.rb, line 27
def self.bytes(dir)
  new(dir).bytes
end

# File lib/free_disk_space.rb, line 15
def self.gigabytes(dir)
  new(dir).gigabytes
end

# File lib/free_disk_space.rb, line 23
def self.kilobytes(dir)
  new(dir).kilobytes
end

# File lib/free_disk_space.rb, line 19
def self.megabytes(dir)
  new(dir).megabytes
end

# File lib/free_disk_space.rb, line 7
def initialize(dir)
  @dir = dir
end

# File lib/free_disk_space.rb, line 11
def self.terabytes(dir)
  new(dir).terabytes
end

# File lib/free_disk_space.rb, line 47
def bytes
  filesystem_stat.block_size * filesystem_stat.blocks_available
end

# File lib/free_disk_space.rb, line 35
def gigabytes
  megabytes / 1024
end

# File lib/free_disk_space.rb, line 43
def kilobytes
  bytes.to_f / 1024
end

# File lib/free_disk_space.rb, line 39
def megabytes
  kilobytes / 1024
end

# File lib/free_disk_space.rb, line 31
def terabytes
  gigabytes / 1024
end

# File lib/free_disk_space.rb, line 53
def filesystem_stat
  @filesystem_stat ||= Sys::Filesystem.stat(dir)
end