class GenerateRcFile

# File lib/generate_rc_file/generate_rc_file.rb, line 27
def initialize(
    i           = ARGV,
    run_already = true
  )
  reset
  set_commandline(i)
  parse_commandline
  run if run_already
end

# File lib/generate_rc_file/generate_rc_file.rb, line 140
def add_header_for(this_file) # Add the default header here.
  HEADER1+this_file+'_rc'+N+HEADER2
end

# File lib/generate_rc_file/generate_rc_file.rb, line 40
def base_directory?
  @base_dir
end

# File lib/generate_rc_file/generate_rc_file.rb, line 160
def do_generate_the_rc_file(use_this_input = @commandline)
  if use_this_input.is_a? Array
    if use_this_input.empty?
      use_this_input << ARRAY_ALL_FILES # Add all possible rc files here.
    else
      case use_this_input
      when 'all',:all
        use_this_input << ARRAY_ALL_FILES
      when 'cd',:cd
        use_this_input << 'cd_aliases'
      end
    end
  end
  use_this_input.flatten.each {|generate_this_file|
    generate_this_file = generate_this_file.to_s # We need a String.
    full_path_to_the_file = LINUX_YAML+generate_this_file+'.yml'
    # ===================================================================== #
    # Next, add some exceptions:
    # ===================================================================== #
    if    full_path_to_the_file.include? 'aliases.yml'
      full_path_to_the_file = RCFILE_GENERATOR_YAML_DIRECTORY+'aliases.yml'
    elsif full_path_to_the_file.include? 'cd_aliases.yml'
      full_path_to_the_file = RCFILE_GENERATOR_YAML_DIRECTORY+'cd_aliases.yml'
    elsif full_path_to_the_file.include? 'programs_aliases.yml'
      full_path_to_the_file = RCFILE_GENERATOR_YAML_DIRECTORY+'programs_aliases.yml'
    end
    hash_dataset = load_yaml(full_path_to_the_file)
    _ = ''.dup
    _ << add_header_for(generate_this_file) # Add the default header here.
    # ===================================================================== #
    # We have to find out whether we will use alias-style or export-style
    # next. For alias-style, we also may have to use putty-style or
    # normal-style.
    # ===================================================================== #
    if ARRAY_WHICH_FILES_TO_ALIAS.include? generate_this_file
      # =================================================================== #
      # Ok, alias-style comes here.
      # =================================================================== #
      hash_dataset.each_pair {|key, value|
        key   = ensure_main_encoding(key.to_s)
        value = ensure_main_encoding(value.to_s).strip
        if @use_putty_style_aliases
          _ << "alias "+key.to_s+'="'+value+'"'+N
        else
          if value.include? "'" # Need to use another syntax for included ' characters.
            _ << "alias '#{key}'=\"#{value}\"#{N}"
          else
            _ << "alias '#{key}'='#{value}'#{N}"
          end
        end
      }
    else
      # =================================================================== #
      # Ok, in this case we assume export-style.
      # =================================================================== #
      hash_dataset.each_pair {|key, value|
        value = value.to_s
        _ << "export "+key.to_s+'="'+value+'"'+N
      }
    end
    set_store_here(@base_dir+generate_this_file+'_rc')
    store_what_where(_, @store_here)
  }
end

# File lib/generate_rc_file/generate_rc_file.rb, line 55
def enable_putty_style
  @use_putty_style_aliases = true
end

# File lib/generate_rc_file/generate_rc_file.rb, line 64
def ensure_main_encoding(
    i,
    use_this_encoding = ISO_ENCODING
  )
  if i.is_a?(String)
    i = i.dup if i.frozen?
    i = i.force_encoding(use_this_encoding)
  end
  i
end

# File lib/generate_rc_file/generate_rc_file.rb, line 147
def load_yaml(i) # A simple, failsafe yaml-wrapper.
  begin
    YAML.load_file(i)
  rescue Exception => error
    opn; e 'We encountered an error in GenerateRCFile, in '\
           'the method load_yaml():'
    pp error
  end
end

# File lib/generate_rc_file/generate_rc_file.rb, line 91
def parse_commandline(i = @commandline)
  @commandline.each {|entry|
    case entry # case tag
    # ===================================================================== #
    # === gcfile --dir=~/AUTOGENERATED
    # ===================================================================== #
    when /-?-?dir=(.+)/ # See: http://rubular.com/r/kF3uKcOoL9
      set_base_dir($1.to_s.dup)
      try_to_create_the_base_directory_if_it_does_not_exist(base_dir?) # Also ensure that the directory exists.
    # ===================================================================== #
    # === --help
    # ===================================================================== #
    when /-?-?help/i
      show_help
      exit
    end
  }
  purge_entries_with_two_hyphens
end

# File lib/generate_rc_file/generate_rc_file.rb, line 114
def purge_entries_with_two_hyphens
  @commandline.reject! {|entry| entry.to_s.start_with? '--' }
end

# File lib/generate_rc_file/generate_rc_file.rb, line 47
def reset
  set_base_dir(BASE_DIR)
  @use_putty_style_aliases = false # if true we use putty-style aliases.
end

# File lib/generate_rc_file/generate_rc_file.rb, line 264
def run
  do_generate_the_rc_file
end

# File lib/generate_rc_file/generate_rc_file.rb, line 228
def set_base_dir(i = BASE_DIR)
  i = i.to_s.dup # Work on a "fresh" copy.
  # ======================================================================= #
  # Must check if the input contains a ~ character, which is then assumed
  # to refer to the home dir of the user.
  # ======================================================================= #
  if i.include? '~'
    i = File.expand_path(i)
  end
  i << '/' unless i.end_with? '/'
  @base_dir = i
end

# File lib/generate_rc_file/generate_rc_file.rb, line 121
def set_commandline(i)
  i = [i] unless i.is_a? Array
  @commandline = i
end

# File lib/generate_rc_file/generate_rc_file.rb, line 131
def set_store_here(i)
  @store_here = i
end

# File lib/generate_rc_file/generate_rc_file.rb, line 78
def show_help
  e
  e 'You can use another target directory.'
  e
  e 'To do this, do:'
  e
  e '  generate_rc_file --dir=~/AUTOGENERATED'
  e
end

# File lib/generate_rc_file/generate_rc_file.rb, line 253
def store_what_where(
    what  = @_,
    where = base_directory?+'aliases_rc'
  ) # store what, where.
  opn; e 'Now storing at `'+sfile(where)+'`.'
  File.open(where, 'w+') {|f| f.puts what }
end

# File lib/generate_rc_file/generate_rc_file.rb, line 244
def try_to_create_the_base_directory_if_it_does_not_exist(i = @base_dir)
  unless File.directory? i
    FileUtils.mkdir_p(i) if File.writable?(File.dirname(i))
  end
end