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file_unix.rb
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file_unix.rb
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# encoding: utf-8
# author: Dominik Richter
# author: Christoph Hartmann
require 'shellwords'
require 'train/extras/stat'
module Train::Extras
class UnixFile < FileCommon
attr_reader :path
def initialize(backend, path, follow_symlink = true)
super(backend, path, follow_symlink)
@spath = Shellwords.escape(@path)
end
def content
@content ||= case
when !exist?, directory?
nil
when size.nil?, size == 0
''
else
@backend.run_command("cat #{@spath}").stdout || ''
end
end
def exist?
@exist ||= (
f = @follow_symlink ? '' : " || test -L #{@spath}"
@backend.run_command("test -e #{@spath}"+f)
.exit_status == 0
)
end
def path
return @path unless @follow_symlink && symlink?
@link_path ||= read_target_path
end
def mounted
@mounted ||=
@backend.run_command("mount | grep -- ' on #{@spath}'")
end
%w{
type mode owner group uid gid mtime size selinux_label
}.each do |field|
define_method field.to_sym do
stat[field.to_sym]
end
end
def product_version
nil
end
def file_version
nil
end
def stat
return @stat if defined?(@stat)
@stat = Train::Extras::Stat.stat(@spath, @backend, @follow_symlink)
end
private
# Returns full path of a symlink target(real dest) or '' on symlink loop
def read_target_path
full_path = @backend.run_command("readlink -n #{@spath} -f").stdout
# Needed for some OSes like OSX that returns relative path
# when the link and target are in the same directory
if !full_path.start_with?('/') && full_path != ''
full_path = File.expand_path("../#{full_path}", @spath)
end
full_path
end
end
end