104 lines
2.2 KiB
Ruby
104 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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require 'optparse'
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require 'etc'
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COLUMNS = 3
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MARGIN = 3
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TYPES = {
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'fifo' => 'p',
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'characterSpecial' => 'c',
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'directory' => 'd',
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'blockSpecial' => 'b',
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'file' => '-',
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'link' => 'l',
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'socket' => 's'
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}.freeze
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PERMISSIONS = {
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'0' => '---',
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'1' => '--x',
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'2' => '-w-',
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'3' => '-wx',
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'4' => 'r--',
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'5' => 'r-x',
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'6' => 'rw-',
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'7' => 'rwx'
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}.freeze
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def run
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params = ARGV.getopts('a', 'r', 'l')
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filenames = params['a'] ? Dir.glob('*', File::FNM_DOTMATCH) : Dir.glob('*')
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filenames = filenames.reverse if params['r']
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params['l'] ? output_file_datails(filenames) : output(filenames)
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end
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def output(filenames)
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rows = filenames.size.ceildiv(COLUMNS)
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pads = pad_created(filenames, rows)
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(0...rows).each do |row|
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COLUMNS.times do |column|
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index = row + column * rows
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print filenames[index].ljust(pads[column] + COLUMNS) if filenames[index]
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end
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puts
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end
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end
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def pad_created(filenames, rows)
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filenames.each_slice(rows).map { _1.map(&:length).max }
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end
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def output_file_datails(filenames)
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puts total_file_blocks(filenames)
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filenames.each do |file|
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file_stat = File::Stat.new(file)
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print TYPES[file_stat.ftype]
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print file_mode(file_stat)
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print owner_info(file_stat, filenames)
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print time_stamp(file_stat)
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print symbolic(file)
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puts
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end
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end
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def owner_info(file_stat, filenames)
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print " #{file_stat.nlink}"
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print " #{Etc.getpwuid(file_stat.uid).name}"
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print " #{Etc.getgrgid(file_stat.gid).name}"
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" #{file_stat.size}".rjust(max_filename_length(filenames))
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end
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def symbolic(filenames)
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if File.lstat(filenames).symlink?
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" #{filenames} -> #{File.readlink(filenames)}"
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else
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" #{filenames}"
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end
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end
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def file_mode(file_stat)
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file_count = file_stat.mode.to_s(8).slice(-3, 3)
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file_permission = file_count.split('').map do |file|
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PERMISSIONS[file]
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end
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file_permission.join('')
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end
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def max_filename_length(filenames)
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filenames.map { |file| File.size(file) }.max.to_s.length + MARGIN
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end
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def time_stamp(file_stat)
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file_stat.mtime.strftime('%_m月 %_d %H:%M')
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end
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def total_file_blocks(filenames)
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blocks = filenames.map do |file|
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File::Stat.new(file).blocks
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end
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"total #{blocks.sum}"
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end
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run
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