Readline Question - capture full line (done) and completing on that (not done yet)

Ruby
1

Hi,

I am still struggling to get readline-completion on a full line.

Consider this code example:

require 'pp'
require 'readline'

MAIN_ARRAY = %w( abcde fghij )

puts 'Type your input next:'
Readline.completion_case_fold = true
Readline.completer_word_break_characters = "\n"
Readline.completion_append_character = ' '

Readline.completion_proc = proc {|input|
  result = []
  case input
  when /^rcd/
    result << MAIN_ARRAY
  end
  result = result.flatten
  result
}

Readline.readline

Now I wish to type this:

“rcd a” and then press enter.

Then I would like this input to be completed to:

“rcd abcde”

This is stored in the constant MAIN_ARRAY

I never get the completion though…

2

Now I wish to type this:

“rcd a” and then press enter.

Then I would like this input to be completed to:

“rcd abcde”

Ruby’s readline is an implementation of GNU readline, and GNU readline
uses “TAB” completion–not “ENTER” completion, so I don’t know if you
can get that. But you can get this:

Type:

rcd a<TAB>

and get:

rcd abcde

and then you can hit .

require ‘readline’

MAIN_ARRAY = %w( abcde fghij )

#puts ‘Type your input next:’
Readline.completion_case_fold = true
Readline.completer_word_break_characters = “\n”
Readline.completion_append_character = ’ ’

Readline.completion_proc = proc {|input|
first, second = input.split(/\s+/)

if first == ‘rcd’
matching_words = MAIN_ARRAY.select do |word|
word.match /^#{Regexp.escape(second)}/
end

matching_words.size == 1 ?
  'rcd ' + matching_words[0]
  : matching_words

else
[“something”, “else?”]
end

}

Readline.readline(
“Type your input next:\n”,
add_hist = true,
)