class Thor::Shell::Basic
Attributes
Public Instance Methods
Asks something to the user and receives a response.
If asked to limit the correct responses, you can pass in an array of acceptable answers. If one of those is not supplied, they will be shown a message stating that one of those answers must be given and re-asked the question.
If asking for sensitive information, the :echo option can be set to false to mask user input from $stdin.
Example¶ ↑
ask(“What is your name?”)
ask(“What is your favorite Neopolitan flavor?”, :limited_to => [“strawberry”, “chocolate”, “vanilla”])
ask(“What is your password?”, :echo => false)
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 54 def ask(statement, *args) options = args.last.is_a?(Hash) ? args.pop : {} color = args.first if options[:limited_to] ask_filtered(statement, color, options) else ask_simply(statement, color, options) end end
Called if something goes wrong during the execution. This is used by Thor internally and should not be used inside your scripts. If something went wrong, you can always raise an exception. If you raise a Thor::Error
, it will be rescued and wrapped in the method below.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 276 def error(statement) stderr.puts statement end
Deals with file collision and returns true if the file should be overwritten and false otherwise. If a block is given, it uses the block response as the content for the diff.
Parameters¶ ↑
- destination<String>
-
the destination file to solve conflicts
- block<Proc>
-
an optional block that returns the value to be used in diff
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 232 def file_collision(destination) return true if @always_force options = block_given? ? "[Ynaqdh]" : "[Ynaqh]" while true answer = ask %[Overwrite #{destination}? (enter "h" for help) #{options}] case answer when is?(:yes), is?(:force), "" return true when is?(:no), is?(:skip) return false when is?(:always) return @always_force = true when is?(:quit) say 'Aborting...' raise SystemExit when is?(:diff) show_diff(destination, yield) if block_given? say 'Retrying...' else say file_collision_help end end end
Mute everything that's inside given block
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 18 def mute @mute = true yield ensure @mute = false end
Check if base is muted
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 27 def mute? @mute end
Make a question the to user and returns true if the user replies “n” or “no”.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 114 def no?(statement, color=nil) !yes?(statement, color) end
Sets the output padding, not allowing less than zero values.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 33 def padding=(value) @padding = [0, value].max end
Prints values in columns
Parameters¶ ↑
Array[String, String, …]
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 123 def print_in_columns(array) return if array.empty? colwidth = (array.map{|el| el.to_s.size}.max || 0) + 2 array.each_with_index do |value, index| # Don't output trailing spaces when printing the last column if ((((index + 1) % (terminal_width / colwidth))).zero? && !index.zero?) || index + 1 == array.length stdout.puts value else stdout.printf("%-#{colwidth}s", value) end end end
Prints a table.
Parameters¶ ↑
Array[Array[String, String, …]]
Options
¶ ↑
- indent<Integer>
-
Indent the first column by indent value.
- colwidth<Integer>
-
Force the first column to colwidth spaces wide.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 145 def print_table(array, options={}) return if array.empty? formats, indent, colwidth = [], options[:indent].to_i, options[:colwidth] options[:truncate] = terminal_width if options[:truncate] == true formats << "%-#{colwidth + 2}s" if colwidth start = colwidth ? 1 : 0 colcount = array.max{|a,b| a.size <=> b.size }.size maximas = [] start.upto(colcount - 1) do |index| maxima = array.map {|row| row[index] ? row[index].to_s.size : 0 }.max maximas << maxima if index == colcount - 1 # Don't output 2 trailing spaces when printing the last column formats << "%-s" else formats << "%-#{maxima + 2}s" end end formats[0] = formats[0].insert(0, " " * indent) formats << "%s" array.each do |row| sentence = "" row.each_with_index do |column, index| maxima = maximas[index] if column.is_a?(Numeric) if index == row.size - 1 # Don't output 2 trailing spaces when printing the last column f = "%#{maxima}s" else f = "%#{maxima}s " end else f = formats[index] end sentence << f % column.to_s end sentence = truncate(sentence, options[:truncate]) if options[:truncate] stdout.puts sentence end end
Prints a long string, word-wrapping the text to the current width of the terminal display. Ideal for printing heredocs.
Parameters¶ ↑
String
Options
¶ ↑
- indent<Integer>
-
Indent each line of the printed paragraph by indent value.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 205 def print_wrapped(message, options={}) indent = options[:indent] || 0 width = terminal_width - indent paras = message.split("\n\n") paras.map! do |unwrapped| unwrapped.strip.gsub(/\n/, " ").squeeze(" "). gsub(/.{1,#{width}}(?:\s|\Z)/){($& + 5.chr). gsub(/\n\005/,"\n").gsub(/\005/,"\n")} end paras.each do |para| para.split("\n").each do |line| stdout.puts line.insert(0, " " * indent) end stdout.puts unless para == paras.last end end
Say (print) something to the user. If the sentence ends with a whitespace or tab character, a new line is not appended (print + flush). Otherwise are passed straight to puts (behavior got from Highline).
Example¶ ↑
say(“I know you knew that.”)
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 72 def say(message="", color=nil, force_new_line=(message.to_s !~ /( |\t)\Z/)) message = message.to_s message = set_color(message, *color) if color && can_display_colors? buffer = " " * padding buffer << message buffer << "\n" if force_new_line && !message.end_with?("\n") stdout.print(buffer) stdout.flush end
Say a status with the given color and appends the message. Since this method is used frequently by actions, it allows nil or false to be given in log_status, avoiding the message from being shown. If a Symbol is given in log_status, it's used as the color.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 89 def say_status(status, message, log_status=true) return if quiet? || log_status == false spaces = " " * (padding + 1) color = log_status.is_a?(Symbol) ? log_status : :green status = status.to_s.rjust(12) status = set_color status, color, true if color buffer = "#{status}#{spaces}#{message}" buffer << "\n" unless buffer.end_with?("\n") stdout.print(buffer) stdout.flush end
This code was copied from Rake, available under MIT-LICENSE Copyright © 2003, 2004 Jim Weirich
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 260 def terminal_width if ENV['THOR_COLUMNS'] result = ENV['THOR_COLUMNS'].to_i else result = unix? ? dynamic_width : 80 end (result < 10) ? 80 : result rescue 80 end
Make a question the to user and returns true if the user replies “y” or “yes”.
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 107 def yes?(statement, color=nil) !!(ask(statement, color) =~ is?(:yes)) end
Protected Instance Methods
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 374 def as_unicode yield end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 408 def ask_filtered(statement, color, options) answer_set = options[:limited_to] correct_answer = nil until correct_answer answers = answer_set.join(", ") answer = ask_simply("#{statement} [#{answers}]", color, options) correct_answer = answer_set.include?(answer) ? answer : nil say("Your response must be one of: [#{answers}]. Please try again.") unless correct_answer end correct_answer end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 386 def ask_simply(statement, color, options) default = options[:default] message = [statement, ("(#{default})" if default), nil].uniq.join(" ") say(message, color) result = if options[:echo] == false stdin.noecho(&:gets) else stdin.gets end return unless result result.strip! if default && result == "" default else result end end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 289 def can_display_colors? false end
Calculate the dynamic width of the terminal
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 346 def dynamic_width @dynamic_width ||= (dynamic_width_stty.nonzero? || dynamic_width_tput) end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 350 def dynamic_width_stty %x{stty size 2>/dev/null}.split[1].to_i end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 354 def dynamic_width_tput %x{tput cols 2>/dev/null}.to_i end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 293 def lookup_color(color) return color unless color.is_a?(Symbol) self.class.const_get(color.to_s.upcase) end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 306 def stderr $stderr end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 302 def stdin $stdin end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 298 def stdout $stdout end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 362 def truncate(string, width) as_unicode do chars = string.chars.to_a if chars.length <= width chars.join else ( chars[0, width-3].join ) + "..." end end end
# File lib/vendor/thor/lib/thor/shell/basic.rb, line 358 def unix? RUBY_PLATFORM =~ /(aix|darwin|linux|(net|free|open)bsd|cygwin|solaris|irix|hpux)/i end