Created
October 26, 2012 22:04
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| #!/usr/bin/env ruby | |
| require 'tempfile' | |
| require 'rubygems' | |
| require 'kramdown' | |
| abort "Usage: #{__FILE__} <target file path>" unless ARGV[0] | |
| TARGET_FILE = File.expand_path(ARGV[0]) | |
| OUTPUT_FILE = begin | |
| f = Tempfile.new('markdown') | |
| f.close | |
| File.expand_path(f.path + ".html") | |
| ensure | |
| f.unlink | |
| end | |
| # Fetch bootstrap css if it doesn't exist | |
| BOOTSTRAP_FILE_LOCATION = begin | |
| f = Tempfile.new('bootstrap.css') | |
| f.close | |
| File.expand_path(f.path + ".css") | |
| ensure | |
| f.unlink | |
| end | |
| BOOTSTRAP_URL = "http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.0.4/css/bootstrap.min.css" | |
| def open_in_browser | |
| `open #{OUTPUT_FILE}` | |
| end | |
| def ensure_bootstrap_local | |
| unless File.exist?(BOOTSTRAP_FILE_LOCATION) | |
| out = `curl -s #{BOOTSTRAP_URL} > #{BOOTSTRAP_FILE_LOCATION}` | |
| end | |
| end | |
| def body | |
| Kramdown::Document.new(File.read(TARGET_FILE)).to_html | |
| end | |
| def header | |
| <<EOS | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>#{ARGV[0].inspect} preview</title> | |
| <link href="file://#{BOOTSTRAP_FILE_LOCATION}" rel="stylesheet"> | |
| <head><body><div class="container"> | |
| EOS | |
| end | |
| def footer | |
| "</div></body></html>" | |
| end | |
| def convert_target | |
| File.open(OUTPUT_FILE, 'w') do |f| | |
| f.print header | |
| f.print body | |
| f.print footer | |
| end | |
| end | |
| filestat = nil | |
| ensure_bootstrap_local | |
| STDERR.puts "Watching #{TARGET_FILE} for changes." | |
| while true | |
| if (new_filestat = File.stat(TARGET_FILE)) != filestat | |
| filestat = new_filestat | |
| convert_target | |
| open_in_browser | |
| end | |
| sleep 0.3 | |
| end |
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