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-- TODO(ZyX-I): Create compatibility layer.
--{{{1 package.path updater function
-- Last inserted paths. Used to clear out items from package.[c]path when they
-- are no longer in &runtimepath.
local last_nvim_paths = {}
local function _update_package_paths()
local cur_nvim_paths = {}
local rtps = vim.api.nvim_list_runtime_paths()
local sep = package.config:sub(1, 1)
for _, key in ipairs({'path', 'cpath'}) do
local orig_str = package[key] .. ';'
local pathtrails_ordered = {}
local orig = {}
-- Note: ignores trailing item without trailing `;`. Not using something
-- simpler in order to preserve empty items (stand for default path).
for s in orig_str:gmatch('[^;]*;') do
s = s:sub(1, -2) -- Strip trailing semicolon
orig[#orig + 1] = s
end
if key == 'path' then
-- /?.lua and /?/init.lua
pathtrails_ordered = {sep .. '?.lua', sep .. '?' .. sep .. 'init.lua'}
else
local pathtrails = {}
for _, s in ipairs(orig) do
-- Find out path patterns. pathtrail should contain something like
-- /?.so, \?.dll. This allows not to bother determining what correct
-- suffixes are.
local pathtrail = s:match('[/\\][^/\\]*%?.*$')
if pathtrail and not pathtrails[pathtrail] then
pathtrails[pathtrail] = true
pathtrails_ordered[#pathtrails_ordered + 1] = pathtrail
end
end
end
local new = {}
for _, rtp in ipairs(rtps) do
if not rtp:match(';') then
for _, pathtrail in pairs(pathtrails_ordered) do
local new_path = rtp .. sep .. 'lua' .. pathtrail
-- Always keep paths from &runtimepath at the start:
-- append them here disregarding orig possibly containing one of them.
new[#new + 1] = new_path
cur_nvim_paths[new_path] = true
end
end
end
for _, orig_path in ipairs(orig) do
-- Handle removing obsolete paths originating from &runtimepath: such
-- paths either belong to cur_nvim_paths and were already added above or
-- to last_nvim_paths and should not be added at all if corresponding
-- entry was removed from &runtimepath list.
if not (cur_nvim_paths[orig_path] or last_nvim_paths[orig_path]) then
new[#new + 1] = orig_path
end
end
package[key] = table.concat(new, ';')
end
last_nvim_paths = cur_nvim_paths
end
--{{{1 Module definition
return {
_update_package_paths = _update_package_paths,
}
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