LTSV viewer in Ruby
#! /usr/local/bin/ruby
require 'ltsv'
require 'yaml'
require 'optparse'
options = nil
ARGV.options do |opt|
opt.banner << " [file...]"
options = LTSV.def_options(opt)
opt.parse!
end
LTSV.parse(ARGF, **options) do |row|
puts row.to_yaml
end
# -*- coding: us-ascii -*-
require 'csv'
require 'yaml'
class LTSV < CSV
attr_accessor :ordered
alias ordered? ordered
def self.def_options(opt, options = {})
opt.on("-k", "--keys", "--select-keys keys", Array, "comma separated list of keys to select") do |ary|
(options[:select] ||= []).concat(ary)
end
opt.on("-i", "--ignore-keys keys", Array, "comma separated list of keys to ignore") do |ary|
(options[:ignore] ||= []).concat(ary)
end
opt.on("--no-ordered", "sort keys in alphabetical order") do |ordered|
options[:ordered] = ordered
end
opt.on("-m", "--match key:regexp", /\A([^:]+):(.*)/, "filter output by keys against regexp") do |_, key, re|
((options[:match] ||= {})[key] ||= []) << Regexp.new(re)
end
options
end
def initialize(data, match: nil, select: nil, ignore: nil, ordered: true, **options)
super(data, col_sep: "\t", **options)
if match
matches = {}
match.each {|key, re| matches[key] = Regexp.union(re)}
end
@matches = matches
@select_keys = (select if select and !select.empty?)
@ignore_keys = (ignore if ignore and !ignore.empty?)
@ordered = ordered
end
def shift
while row = super
row = row.map {|col| col.split(':', 2)}
if @matches
row = Hash[row]
next unless @matches.any? {|key, re| re =~ row[key]}
end
if ordered?
row = row.to_a
row.sort!
end
row = row.select do |key, val|
(!@select_keys or @select_keys.include?(key)) and
(!@ignore_keys or !@ignore_keys.include?(key))
end
return Hash[row]
end
end
end