examples.runfile

require 'filewatcher'

summary "Generate examples"

usage 'watch [--dev]'
help 'Watch example files and rerun them on change'
option '--dev', 'Watch the dev folder instead of the examples folder'
action :watch do |args|
  folder = args['--dev'] ? 'dev' : 'examples'
  glob = "#{folder}/*.rb"
  
  say "g`watch`: #{glob}"

  Filewatcher.new(glob).watch do |files|
    files.each do |filename, event|
      say "g`#{event}`: #{filename}"
      next if event == :delete

      Dir.chdir folder do
        filename = File.basename filename
        say "g`write`: #{filename}"
        system "ruby #{filename}"
      end
    end
  end
end

help 'Regenerate all SVG examples'
action :build do
  File.delete *Dir['examples/*.svg']
  Dir.chdir 'examples' do
    Dir['*.rb'].each do |filename|
      say "g`write`: #{filename}"
      system "ruby #{filename}"
    end
  end
end

help "Generate readme for examples folder"
action :readme do
  result = ["# Examples\n"]
  Dir['examples/*.rb'].each do |file|
    basename = File.basename file, '.rb'
    next if basename == "vertical_status_leds"

    say "g`read`: #{file}"
    
    title = basename.tr '_', ' '
    code  = File.read(file).strip
    if File.exist? "examples/#{basename}.svg"
      image = "[![#{basename}](#{basename}.svg)](#{file}.svg)"
    else
      image = false
    end

    result.push "## #{title}\n"
    result.push "```ruby"
    result.push code
    result.push "```\n"
    result.push image if image
    result.push "\n"
  end

  result.push "\n---\n"
  result.push "This file was generated automatically with `run examples readme`."

  result = result.join "\n"
  File.write 'examples/README.md', result
  say 'g`write`: examples/README.md'
end