require( 'strict' );  
--[=[------------------------< G E T _ V A R I A N T _ P A R T S >---------------------------------------------  
We get a record that looks more-or-less like this:
%%\n
Type: variant\n
Subtag: bohoric\n
Description: Slovene in Bohorič alphabet\n
Added: 2012-06-27\n
Prefix: sl\n  
Each line is terminated with a \n character.  
Type, for this function can only be 'variant'  
Subtag is the code of Type  
Prefix is a language code to which this variant applies; one language code per Prefix line. There can be
more than one prefix line.  
Description associates Subtag with a proper name or names; one name per Description line. There can be more
than one Description line and Description lines can wrap to the next line. When they do, the first two
characters of the continuation line are spaces.  
Comments: lines can also be continued so once in a Comments line (which is otherwise ignored) all further
continuations in the record are also ignored. This is a crude mechanism to prevent comment continuations
from being concatenated onto the end of descriptions and relies on Description line occuring in the record
before the Comments line.  
Records with private use subtags are ignored.  
]=]  
local function get_variant_parts (record)
local code;
local descriptions = {};
local prefixes = {};
local in_comments = false;  
if string.find (record, 'Deprecated', 1, true) or string.find (record, 'Preferred-Value', 1, true)
or string.find (record, 'Private use', 1, true) then
return 'skip';
end  
for line in string.gmatch (record, '([^\n]+)\n') do -- get a \n terminated line of text (without the \n)
local label = string.match(line, "(.-):")  
if not label and string.find (line, '^ .+') and not in_comments then -- if a continuation line but not a comments continuation
descriptions[#descriptions] = string.gsub (descriptions[#descriptions], '\"$', ''); -- remove trailing quote mark from previous description
descriptions[#descriptions] = descriptions[#descriptions] .. ' ' .. string.match (line, '^ (.+)') .. '\"'; -- extract and save the continuation with new quote mark
elseif label == 'Subtag' then -- if this line is the subtag line
code = string.match (line, 'Subtag: (%w+)'); -- extract and save to subtag's code
elseif label == 'Description' then -- if this line is a description line
local desc = string.match (line, 'Description: (.+)'); -- extract the description
desc = string.gsub (desc, '"', '\\"'); -- in case description contains quote marks (see 1959acad)
table.insert (descriptions, '\"' .. desc .. '\"'); -- save the description wrapped in quote marks
elseif label == 'Prefix' then -- if this line is a prefix line
table.insert (prefixes, '\"' .. string.match (line, 'Prefix: (.+)'):lower .. '\"'); -- extract and save the prefix wrapped in quote marks
elseif label == 'Comments' then -- if this line is a comments line
in_comments = true;
end
end  
return code, table.concat (prefixes, ', '), table.concat (descriptions, ', ');
end  
--[=[------------------------< G E T _ L A N G _ S C R I P T _ R E G I O N _ P A R T S >-----------------------  
We get a record that looks more-or-less like this:
%%\n
Type: language\n
Subtag: aa\n
Description: Afar\n
Added: 2005-10-16\n  
Each line is terminated with a \n character.  
Type, for our purposes can be 'language', 'script', or 'region'  
Subtag is the code of Type  
Description associates Subtag with a proper name or names; one name per Description line. There can be more
than one Description line and Description lines can wrap to the next line. When they do, the first two
characters of the continuation line are spaces.  
Comments: lines can also be continued so once in a Comments line (which is otherwise ignored) all further
continuations in the record are also ignored. This is a crude mechanism to prevent comment continuations
from being concatenated onto the end of descriptions and relies on Description line occuring in the record
before the Comments line.  
Records with private use subtags are ignored.  
]=]  
local function get_lang_script_region_parts (record)
local code;
local suppress; -- Suppress script for this code if specified
local deprecated; -- boolean; true when subtag is deprecated
local descriptions = {};
local in_comments = false;  
if record:find ('Private use') then
return 'skip';
end  
for line in record:gmatch ('([^\n]+)\n') do -- get a \n terminated line of text (without the \n)
local label = line:match ('(.-):');
if 'Subtag' == label then -- if this line is the subtag line
code = line:match ('Subtag: (%w+)'); -- extract and save to subtag's code
elseif 'Description' == label then -- if this line is a description line
table.insert (descriptions, '\"' .. line:match ('Description: (.+)') .. '\"'); -- extract and save the name wrapped in quote marks
elseif 'Deprecated' == label then
deprecated = true; -- subtag is deprecated; set our flag
elseif 'Suppress-Script' == label then
suppress = line:match ('Suppress%-Script: (%S+)');
elseif 'Comments' == label then -- if this line is a comments line
in_comments = true;
elseif line:find ('^ .+') and not in_comments then -- if a continuation line but not a commnets continuation
descriptions[#descriptions] = descriptions[#descriptions]:gsub ('\"$', ''); -- remove trailing quote mark from previous description
descriptions[#descriptions] = descriptions[#descriptions] .. ' ' .. line:match ('^ (.+)') .. '\"'; -- extract and save the continuation with new quote mark
end
end  
return code, table.concat (descriptions, ', '), suppress, deprecated;
end  
--[=[------------------------< I A N A _ E X T R A C T >-------------------------------------------------------  
read a local copy of the IANA language-subtag-registry file and from it build tables to replace the tables in:
Module:Language/data/iana languages
[[Module:Language/data/iana scripts]
Module:Language/data/iana regions  
current language-subtag-registry file can be found at: http://www.iana.org/assignments/language-subtag-registry
archive.org has copies of previous versions see: https://web.archive.org/web/*/http://www.iana.org/assignments/language-subtag-registry  
]=]  
local function iana_extract
local page = mw.title.getCurrentTitle; -- get a page object for this page
local content = page:getContent; -- get unparsed content
local lang_table = {}; -- languages go here
local lang_dep_table = {}; -- deprecated languages go here
local script_table = {}; -- scripts go here
local region_table = {}; -- regions go here
local variant_table = {}; -- variants go here
local suppress_table = {}; -- here we collect suppressed scripts and associated language codes
local iso_639_1_table = {}; -- ISO 639-1 languages; not used by Module:Lang but included here to ensure Module:Language/data/ISO_639-1 gets updated
local file_date; -- first line  
local code;
local descriptions;
local prefixes; -- used for language variants only
local suppress; -- a code's suppress script
local deprecated; -- boolean: true when subtag is deprecated  
file_date = content:match ('(File%-Date: %d%d%d%d%-%d%d%-%d%d)'); -- get the file date line from this version of the source file  
for record in string.gmatch (content, '%%%%([^%%]+)') do -- get a %% delimited 'record' from the file; leave off the delimiters
local record_type = string.match(record, 'Type: (%w+)')
if record_type == 'language' then -- if a language record
code, descriptions, suppress, deprecated = get_lang_script_region_parts (record); -- get the code, description(s), suppress script, and deprecated flag  
if code and ('skip' ~= code) then
if deprecated then
table.insert (lang_dep_table, "[\"" .. code .. "\"] = {" .. descriptions .. "}"); -- make table entries
else
table.insert (lang_table, "[\"" .. code .. "\"] = {" .. descriptions .. "}"); -- make table entries
if 2 == code:len then
table.insert (iso_639_1_table, "[\"" .. code .. "\"] = {" .. descriptions .. "}"); -- make table entries
end
end
elseif not code then