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path: root/scripts/update-readme.lua
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#!/usr/bin/env -S nvim -l
vim.opt.runtimepath:append('.')
local util = require('nvim-treesitter.util')
local parsers = require('nvim-treesitter.parsers')
local tiers = require('nvim-treesitter.config').tiers

local sorted_parsers = {} ---@type { name: string, parser: ParserInfo }[]
for k, v in pairs(parsers) do
  table.insert(sorted_parsers, { name = k, parser = v })
end
table.sort(sorted_parsers, function(a, b)
  return a.name < b.name
end)

local generated_text = [[
Language | Tier | Queries | Maintainer
-------- |:----:|:-------:| ----------
]]
local footnotes = ''

for _, v in ipairs(sorted_parsers) do
  local p = v.parser
  -- language
  if p.install_info then
    generated_text = generated_text
      .. '['
      .. v.name
      .. ']('
      .. p.install_info.url
      .. ')'
      .. (p.readme_note and '[^' .. v.name .. ']' or '')
      .. ' | '
  else
    generated_text = generated_text
      .. v.name
      .. ' (queries only)'
      .. (p.readme_note and '[^' .. v.name .. ']' or '')
      .. ' | '
  end

  if p.readme_note then
    footnotes = footnotes .. '[^' .. v.name .. ']: ' .. p.readme_note .. '\n'
  end

  -- tier
  generated_text = generated_text .. (p.tier and tiers[p.tier] or '') .. ' | '

  -- queries
  generated_text = generated_text
    .. '`'
    .. (vim.uv.fs_stat('runtime/queries/' .. v.name .. '/highlights.scm') and 'H' or ' ')
    .. (vim.uv.fs_stat('runtime/queries/' .. v.name .. '/folds.scm') and 'F' or ' ')
    .. (vim.uv.fs_stat('runtime/queries/' .. v.name .. '/indents.scm') and 'I' or ' ')
    .. (vim.uv.fs_stat('runtime/queries/' .. v.name .. '/injections.scm') and 'J' or ' ')
    .. (vim.uv.fs_stat('runtime/queries/' .. v.name .. '/locals.scm') and 'L' or ' ')
    .. '` | '

  -- Maintainer
  generated_text = generated_text
    .. (p.maintainers and table.concat(p.maintainers, ', ') or '')
    .. '\n'
end
generated_text = generated_text .. footnotes

local readme = 'SUPPORTED_LANGUAGES.md'
local readme_text = util.read_file(readme)

local new_readme_text = string.gsub(
  readme_text,
  '<!%-%-parserinfo%-%->.*<!%-%-parserinfo%-%->',
  '<!--parserinfo-->\n' .. generated_text .. '<!--parserinfo-->'
)

util.write_file(readme, new_readme_text)

if string.find(readme_text, generated_text, 1, true) then
  print(readme .. ' is up-to-date\n')
else
  print('New ' .. readme .. ' was written\n')
end