new_contents: #!/usr/bin/python
  #
  # Copyright 2015 Google Inc. All rights reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """
  Generate a csv with the following columns:
  - bcp-47 language code (minimal)
  - script (most likely script for the code)
  - style name (Serif, Sans, Naskh...)
  - ui status (UI, <empty>)
  - font name
  
  This will start with a canned list of languages for now. We could 
  generate a more comprehensive list from our data.
  """
  
  import collections
  
  import os
  from os import path
  
  from nototools import cldr_data
  from nototools import noto_fonts
  
  LANGS = (
      'af,am,ar,az,bg,bn,bs,ca,cs,da,de,el,en,en-US,es,es-419,et,eu,fa,fi,'
      'fil,fr,gl,gu,hi,hr,hu,hy,id,is,it,iw,ja,ka,kk,km,kn,ko,ky,lo,lt,lv,'
      'mk,ml,mn,mr,ms,my,ne,nl,no,pa,pl,pt-BR,pt-PT,ro,ru,si,sk,sl,sq,sr,'
      'sv,sw,ta,te,th,tl,tr,uk,ur,uz,vi,zh-CN,zh-TW,zu').split(',')
  
  def accept_font(f):
    return (
        f.family == 'Noto' and  # exclude Arimo, Tinos, Cousine
        f.style != 'Nastaliq' and  # exclude Nastaliq, not suitable for maps
        f.script != 'HST' and  # exclude Historic, tool limitation
        f.weight == 'Regular' and  # to limit members of fonts, we don't
        not f.slope and            #   care about weights
        f.fmt in ['ttf', 'otf'] and  # only support these formats
        (not f.is_cjk or f.subset))  # 'small' language-specific CJK subsets
  
  fonts = filter(accept_font, noto_fonts.get_noto_fonts())
  families = noto_fonts.get_families(fonts).values()
  
  def write_csv_header(outfile):
    print >> outfile, 'Code,Script,Style,UI,Font Name'
  
  
  def write_csv(outfile, lang, script, style, ui, members):
    if members:
      print >> outfile, ','.join(
          [lang, script, style, ui,
           noto_fonts.get_font_family_name(members[0].filepath)])
  
  
  with open('lang_to_font_table.csv', 'w') as outfile:
    write_csv_header(outfile)
    for lang in LANGS:
      script = cldr_data.get_likely_script(lang)
      found_font = False
      for family in sorted(families, key=lambda f: f.name):
        if script not in noto_fonts.script_key_to_scripts(
            family.rep_member.script):
          continue
  
        found_font = True
        members = family.hinted_members or family.unhinted_members
        ui_members = [m for m in members if m.is_UI]
        non_ui_members = [m for m in members if not m.is_UI]
        assert len(ui_members) <= 1
        assert len(non_ui_members) <= 1
        write_csv(outfile, lang, script, family.rep_member.style, '',
                  non_ui_members)
        write_csv(outfile, lang, script, family.rep_member.style, 'UI',
                  ui_members)
  
      if not found_font:
        print '## no font found for lang %s' % lang
  
subject: add tool to generate lang to font table