Wrapper to run the markdown renderer gimli

md2pdf

#!/usr/bin/ruby
#
# Wrapper to run gimli
#
# (c) 2015 Bernd Busse

require 'rubygems'

version = ">= 0"

if ARGV.first
  str = ARGV.first
  str = str.dup.force_encoding("BINARY") if str.respond_to? :force_encoding
  if str =~ /\A_(.*)_\z/ and Gem::Version.correct?($1) then
    version = $1
    ARGV.shift
  end
end

_GIMLI_CONFIG = Dir.home + "/.config/gimli/"
_GIMLI_CSS = "./gimli.css"
_GIMLI_HEADER = "./gimli_header.html"
_GIMLI_FOOTER = "./gimli_footer.html"

if not File.file?(_GIMLI_CSS)
  _GIMLI_CSS = File.join(_GIMLI_CONFIG, _GIMLI_CSS)
end

if File.file?(_GIMLI_HEADER)
  _abs = Dir.pwd
else
  _abs = _GIMLI_CONFIG
end
_GIMLI_HEADER = "file:///" + File.join(_abs, _GIMLI_HEADER)

if File.file?(_GIMLI_FOOTER)
  _abs = Dir.pwd
else
  _abs = _GIMLI_CONFIG
end
_GIMLI_FOOTER = "file:///" + File.join(_abs, _GIMLI_FOOTER)

if ARGV.length == 0 or ARGV.length > 1
  abort "ERROR: filename missing\n"
end

_infile = ARGV.first
ARGV.shift

if not File.file?(_infile)
  abort "ERROR: \"" + _infile + "\" is not a file"
end

_infile = File.absolute_path(_infile)
_filename = File.basename(_infile, File.extname(_infile)) + ".pdf"

_title = ""
_subtitle = ""
_toc = false

File.open(_infile) do |f|
  readheader = false
  f.each_line do |line|
    if line.match(/^(---\s*\n)/)
      if not readheader
        readheader = true
      else
        break
      end
    elsif readheader
      if line.match(/^(title:\s?)/)
        _title = line.match(/'(.*)'\s*$/)[1]
      elsif line.match(/^(subtitle:\s?)/)
        _subtitle = line.match(/'(.*)'\s*$/)[1]
      elsif line.match(/^(toc:\s?)/)
        if line.match(/'(true)'\s*$/i) or line.match(/'(yes)'\s*$/i)
          _toc = true
        end
      end
    end
  end
end

_WKHTMLTOPDF_ARGUMENTS = "?filename=" + _filename + "&title=" + _title + "&subtitle=" + _subtitle
_WKHTMLTOPDF_HEADER = "--header-html \"" + _GIMLI_HEADER + _WKHTMLTOPDF_ARGUMENTS + "\""
_WKHTMLTOPDF_FOOTER = "--footer-html \"" + _GIMLI_FOOTER + _WKHTMLTOPDF_ARGUMENTS + "\""
_WKHTMLTOPDF_OPTIONS = _WKHTMLTOPDF_HEADER + " " + _WKHTMLTOPDF_FOOTER + " -B 20 -L 20 -R 20 -T 20"

if _toc
  _WKHTMLTOPDF_OPTIONS += " -t"
end

ARGV.push("-w", _WKHTMLTOPDF_OPTIONS)
ARGV.push("-s", _GIMLI_CSS)
ARGV.push("-y")
ARGV.push("-f", _infile)

gem 'gimli', version
load Gem.bin_path('gimli', 'gimli', version)