bconv

#! /usr/bin/env ruby

#--
###############################################################################
#                                                                             #
# bconv -- Convert between bibliographic (and other) encodings                #
#   [A component of cmess, the encoding tool-box]                             #
#                                                                             #
# Copyright (C) 2008-2012 University of Cologne,                              #
#                         Albertus-Magnus-Platz,                              #
#                         50923 Cologne, Germany                              #
#                                                                             #
# Copyright (C) 2013-2014 Jens Wille                                          #
#                                                                             #
# Authors:                                                                    #
#     Jens Wille <jens.wille@gmail.com>                                       #
#                                                                             #
# cmess is free software; you can redistribute it and/or modify it under the  #
# terms of the GNU Affero General Public License as published by the Free     #
# Software Foundation; either version 3 of the License, or (at your option)   #
# any later version.                                                          #
#                                                                             #
# cmess is distributed in the hope that it will be useful, but WITHOUT ANY    #
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS   #
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for     #
# more details.                                                               #
#                                                                             #
# You should have received a copy of the GNU Affero General Public License    #
# along with cmess. If not, see <http://www.gnu.org/licenses/>.               #
#                                                                             #
###############################################################################
#++

require 'cmess/bconv'
require 'cmess/cli'

include CMess::CLI

options = {
  input:           STDIN,
  output:          STDOUT,
  source_encoding: determine_system_encoding,
  target_encoding: determine_system_encoding,
  chartab_file:    CMess::BConv::DEFAULT_CHARTAB_FILE
}

parse_options { |opts|
  opts.banner = "Usage: #{$0} [options] [FILE...]"

  opts.separator ''
  opts.separator 'Options:'

  opts.on('-i', '--input FILE', 'Input file to read from [Default: STDIN]') { |input|
    options[:input] = open_file_or_std(input)
    options[:input_set] = true
  }

  opts.on('-o', '--output FILE', 'Output file to write to [Default: STDOUT]') { |output|
    options[:output] = open_file_or_std(output, 'w')
  }

  opts.on('-I', '--in-place FILE', "Modify file in-place; sets '-i' and '-o'") { |file|
    options[:input], options[:output] = open_file_in_place(file)
    options[:input_set] = true
  }

  opts.separator ''

  opts.on('-e', '--source-encoding ENCODING', "Encoding of input file [Default: #{options[:source_encoding]}]") { |encoding|
    options[:source_encoding] = encoding.downcase
  }

  opts.on('-t', '--target-encoding ENCODING', "Desired encoding for output file [Default: #{options[:target_encoding]}]") { |encoding|
    options[:target_encoding] = encoding.downcase
  }

  opts.separator ''

  opts.on('-c', '--chartab YAML_FILE', 'File containing character mappings, in YAML format.', "[Default: #{options[:chartab_file]}]") { |chartab|
    options[:chartab_file] = chartab
  }

  opts.on('-l', '--list-encodings', 'Print a list of all available bibliographic encodings', "and exit; depends on <chartab>, see '-c'") {
    options[:list_encodings] = true
  }

  opts.separator ''
  opts.separator 'Generic options:'

  opts.on('-h', '--help', 'Print this help message and exit') {
    puts opts
    exit
  }

  opts.on('--version', 'Print program version and exit') {
    puts "#{File.basename($0)} v#{CMess::BConv::VERSION} (part of cmess v#{CMess::VERSION})"
    exit
  }

  opts.separator ''
  opts.separator 'When FILE is -, either STDIN or STDOUT is used (as appropriate).'
}

cli do
  if options[:list_encodings]
    puts CMess::BConv.encodings(options[:chartab_file])
    exit
  end

  [:source_encoding, :target_encoding].each { |key|
    options[key].call if options[key].respond_to?(:call)
  }

  trailing_args_as_input(options)

  CMess::BConv.convert(options)
end