Class: Whitepaper::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/whitepaper/cli.rb

Overview

The commandline interface to Whitespace.

Constant Summary collapse 

<<-USAGE
USAGE

Class Method Summary collapse

Class Method Details

.parse_options ⇒ Object

Parse and respond to the command line options.



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# File 'lib/whitepaper/cli.rb', line 14

def parse_options
  options = {}
  @opts = OptionParser.new do |opts|
    opts.banner = BANNER.gsub(/^    /, '')

    opts.separator ''
    opts.separator 'Options:'

    opts.on('-h', '--help', 'Display this help') do
      puts opts
      exit 0
    end

    opts.on('-t', '--by-title KEYWORDS', 'Display the data for the paper with the given KEYWORDS in title') do |title|
      options[:by_title] = title
    end

    opts.on('-d', '--download', 'Downloads a pdf of the paper of the paper found') do
      options[:download] = true
    end

    opts.on('-p', '--pdf', 'Display a link to the pdf of the paper found') do
      options[:print_pdf_url] = true
    end

    opts.on('-n', '--name', 'Display the title of the paper found') do
      options[:print_title] = true
    end

    opts.on('-a', '--authors', 'Display the authors of the paper found') do
      options[:print_authors] = true
    end

  end

  @opts.parse!

  if options[:by_title]
    paper = Whitepaper.find_by_title(options[:by_title])

    if options[:print_title]
      puts paper.title
    end

    if options[:print_authors]
      puts paper.authors
    end

    if options[:print_pdf_url]
      unless paper.pdf_urls.empty?
        puts paper.pdf_urls.first
      end
    end

    unless options[:print_title] or
           options[:print_authors] or
           options[:print_pdf_url]
      puts paper
    end

    if options[:download] and not paper.pdf_urls.empty?
      puts "Downloading: " + paper.pdf_urls.first
      paper.download
    end
  else
    puts @opts
  end
end

.run ⇒ Object

Executes the command line version of whitespace.



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# File 'lib/whitepaper/cli.rb', line 84

def CLI.run
  begin
    parse_options
  rescue OptionParser::InvalidOption => e
    warn e
    exit -1
  end

  # Default
  puts BANNER
  exit 0
end