Load snippets in directories

Textadept 11 had a feature that would allow you to load snippets from files inside one or more directories via a textadept.snippets.paths table. While Textadept 12 removed this feature, you can still have it by putting the following in your ~/.textadept/init.lua:

local paths = {'/tmp/snippets'}
for _, path in ipairs(paths) do
  for basename in lfs.dir(path) do
    local filename = path .. '/' .. basename
    if lfs.attributes(filename, 'mode') ~= 'file' then goto continue end
    local f = io.open(filename)
    local text = f:read('a')
    f:close()
    local lang, trigger, ext = basename:match('^([^.]+)%.?([^.]*)%.?([^.]*)$')
    if type(snippets[lang]) == 'table' then
      snippets[lang][trigger] = text
    elseif ext == '' then
      trigger = lang
      snippets[trigger] = text
    end
    ::continue::
  end
end

Snippet filenames have the form "lang.trigger.ext" where lang is an optional lexer language the snippet is for, trigger is the snippet's trigger text, and ext is an optional file extension for the snippet (useful for editing it within Textadept to get syntax highlighting).

For example, suppose the directory /tmp/snippets contained a foo file with the contents "bar", and a lua.foo.lua file with the contents "baz". On initialization, Textadept would create a global snippet "foo" that expands to "bar", and a Lua-specific snippet that expands "foo" to "baz".