utils/generate-command-help.rb

   1 #!/usr/bin/env ruby
   2
   3 require 'net/http'
   4 require 'net/https'
   5 require 'json'
   6 require 'uri'
   7
   8 dest = ARGV[0]
   9 tmpl = File.read './utils/help.h'
  10
  11 url = URI.parse 'https://github.com/antirez/redis-doc/raw/master/commands.json'
  12 client = Net::HTTP.new url.host, url.port
  13 client.use_ssl = true
  14 res = client.get url.path
  15
  16 def argument arg
  17   name = arg['name'].is_a?(Array) ? arg['name'].join(' ') : arg['name']
  18   name = arg['enum'].join '|' if 'enum' == arg['type']
  19   name = arg['command'] + ' ' + name if arg['command']
  20   if arg['multiple']
  21     name = "(#{name})"
  22     name += arg['optional'] ? '*' : '+'
  23   elsif arg['optional']
  24     name = "(#{name})?"
  25   end
  26   name
  27 end
  28
  29 def arguments command
  30   return '-' unless command['arguments']
  31   command['arguments'].map do |arg|
  32     argument arg
  33   end.join ' '
  34 end
  35
  36 case res
  37 when Net::HTTPSuccess
  38   first = true
  39   commands = JSON.parse(res.body)
  40   c = commands.map do |key, command|
  41     buf = if first
  42       first = false
  43       ' '
  44     else
  45       "\n  ,"
  46     end
  47     buf += " { \"#{key}\"\n" +
  48     "  , \"#{arguments(command)}\"\n" +
  49     "  , \"#{command['summary']}\"\n" +
  50     "  , COMMAND_GROUP_#{command['group'].upcase}\n" +
  51     "  , \"#{command['since']}\" }"
  52   end.join("\n")
  53   puts "\n// Auto-generated, do not edit.\n" + tmpl.sub('__COMMANDS__', c)
  54 else
  55   res.error!
  56 end