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local async = require('blink.cmp.lib.async')
local help = {}
--- Processes a help file and returns a list of tags asynchronously
--- @param file string
--- @return blink.cmp.Task
--- TODO: rewrite using async lib, shared as a library in lib/fs.lua
local function read_tags_from_file(file)
return async.task.new(function(resolve)
vim.uv.fs_open(file, 'r', 438, function(err, fd)
if err or fd == nil then return resolve({}) end
-- Read file content
vim.uv.fs_fstat(fd, function(stat_err, stat)
if stat_err or stat == nil then
vim.uv.fs_close(fd)
return resolve({})
end
vim.uv.fs_read(fd, stat.size, 0, function(read_err, data)
vim.uv.fs_close(fd)
if read_err or data == nil then return resolve({}) end
-- Process the file content
local tags = {}
for line in data:gmatch('[^\r\n]+') do
local tag = line:match('^([^\t]+)')
if tag then table.insert(tags, tag) end
end
resolve(tags)
end)
end)
end)
end)
end
--- @param arg_prefix string
function help.get_completions(arg_prefix)
local help_files = vim.api.nvim_get_runtime_file('doc/tags', true)
return async.task
.await_all(vim.tbl_map(read_tags_from_file, help_files))
:map(function(tags_arrs) return require('blink.cmp.lib.utils').flatten(tags_arrs) end)
:map(function(tags)
-- TODO: remove after adding support for fuzzy matching on custom range
return vim.tbl_filter(function(tag) return vim.startswith(tag, arg_prefix) end, tags)
end)
end
return help
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