lib/markdown/nitmd.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # A Markdown parser for Nit.
  16 module nitmd
  17
  18 import markdown
  19 import decorators
  20 import man
  21
  22 import opts
  23
  24 var options = new OptionContext
  25 var opt_help = new OptionBool("Show this help.", "-h", "-?", "--help")
  26 options.add_option(opt_help)
  27 var opt_to = new OptionString("Specify output format (html, md, man)", "-t", "--to")
  28 options.add_option(opt_to)
  29
  30 options.parse(args)
  31 if options.rest.length != 1 then
  32         print "usage: nitmd [-t format] <file.md>"
  33         options.usage
  34         exit 1
  35 end
  36
  37 var file = options.rest.first
  38 if not file.file_exists then
  39         print "'{file}' not found"
  40         exit 1
  41 end
  42
  43 var ifs = new FileReader.open(file)
  44 var md = ifs.read_all
  45 ifs.close
  46
  47 var processor = new MarkdownProcessor
  48 var to = opt_to.value
  49 if to == null or to == "html" then
  50         # Noop
  51 else if to == "md" then
  52         processor.decorator = new MdDecorator
  53 else if to == "man" then
  54         processor.decorator = new ManDecorator
  55 else
  56         print "Unknown output format: {to}"
  57         exit 1
  58 end
  59 print processor.process(md)