Class: Minitar::CLI::Command::List

Inherits:
Minitar::CLI::Command
  • Object
show all
Includes:
CatchMinitarErrors
Defined in:
lib/minitar/cli/command/list.rb

Overview

Tarball list command. This will be replaced in a future version by one of the better-executed CLI application frameworks like GLI, after Ruby 1.8 and 1.9 support have been dropped.

Constant Summary collapse

HELP =
<<-EOH
  minitar list [OPTIONS] <tarfile|-> [<file>+]

Lists files in an existing tarfile. If the tarfile is named .tar.gz or
.tgz, then it will be uncompressed automatically. If the tarfile is "-",
then it will be read from standard input (stdin) so that minitar may be
piped.

If --verbose or --progress is specified, then the file list will be
similar to that produced by the Unix command "ls -l".

list Options:
  --uncompress, -z      Uncompresses the tarfile with gzip.
  --sort [<FIELD>], -S  Sorts the list of files by the specified
                        field. The sort defaults to the filename.
  --reverse, -R         Reverses the sort.
  -l                    Lists the files in detail.

Sort Fields:
name, mtime, size

EOH

Instance Method Summary collapse

Methods included from CatchMinitarErrors

#call

Instance Method Details

#altnameObject



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# File 'lib/minitar/cli/command/list.rb', line 11

def altname
  "ls"
end

#helpObject



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# File 'lib/minitar/cli/command/list.rb', line 160

def help
  HELP
end

#modestr(mode) ⇒ Object



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# File 'lib/minitar/cli/command/list.rb', line 38

def modestr(mode)
  s = String.new("---")
  s[0] = "r" if (mode & 4) == 4
  s[1] = "w" if (mode & 2) == 2
  s[2] = "x" if (mode & 1) == 1
  s
end

#nameObject



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# File 'lib/minitar/cli/command/list.rb', line 7

def name
  "list"
end

#run(args, opts = {}) ⇒ Object



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# File 'lib/minitar/cli/command/list.rb', line 48

def run(args, opts = {})
  argv = []
  output = nil
  files = []
  opts[:field] = "name"

  while (arg = args.shift)
    case arg
    when "--sort", "-S"
      opts[:sort] = true
      opts[:field] = args.shift
    when "--reverse", "-R"
      opts[:reverse] = true
      opts[:sort] = true
    when "--uncompress", "-z"
      opts[:uncompress] = true
    when "-l"
      opts[:verbose] = true
    else
      argv << arg
    end
  end

  if argv.empty?
    ioe[:output] << "Not enough arguments.\n\n"
    commander.command("help").call(%w(list))
    return 255
  end

  input = argv.shift
  if input == "-"
    opts[:name] = "STDIN"
    input = ioe[:input]
  else
    opts[:name] = input
    input = File.open(input, "rb")
  end

  if /\.tar\.gz$|\.tgz$/ =~ opts[:name] || opts[:uncompress]
    require "zlib"
    input = Zlib::GzipReader.new(input)
  end

  files << argv.to_a
  files.flatten!

  if opts[:verbose] || opts[:progress]
    format = "%10s %4d %8s %8s %8d %12s %s"
    datefmt = "%b %d  %Y"
    timefmt = "%b %d %H:%M"
    fields = %w(permissions inodes user group size date fullname)
  else
    format = "%s"
    fields = %w(fullname)
  end

  opts[:field] = opts[:field].to_sym
  opts[:field] = :full_name if opts[:field] == :name

  output = []

  today = Time.now
  oneyear = Time.mktime(today.year - 1, today.month, today.day)

  Minitar::Input.each_entry(input) do |entry|
    next unless files.empty? || files.include?(entry.full_name)

    value = format % fields.map { |ff|
      case ff
      when "permissions"
        s = String.new(entry.directory? ? "d" : "-")
        s << modestr(entry.mode / 0o100)
        s << modestr(entry.mode / 0o010)
        s << modestr(entry.mode)
      when "inodes"
        entry.size / 512
      when "user"
        entry.uname || entry.uid || 0
      when "group"
        entry.gname || entry.gid || 0
      when "size"
        entry.size
      when "date"
        if Time.at(entry.mtime) > oneyear
          Time.at(entry.mtime).strftime(timefmt)
        else
          Time.at(entry.mtime).strftime(datefmt)
        end
      when "fullname"
        entry.full_name
      end
    }

    if opts[:sort]
      output << [entry.send(opts[:field]), value]
    else
      ioe[:output] << value << "\n"
    end
  end

  if opts[:sort]
    output = output.sort_by { |a| a[0] }
    if opts[:reverse]
      output.reverse_each { |oo| ioe[:output] << oo[1] << "\n" }
    else
      output.each { |oo| ioe[:output] << oo[1] << "\n" }
    end
  end

  0
end