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init.lua
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init.lua
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local M = {}
local features = require "bigfile.features"
---@class config
---@field filesize integer size in MiB
---@field pattern string|string[] see |autocmd-pattern|
---@field features string[] array of features
local default_config = {
filesize = 2,
pattern = { "*" },
features = {
"indent_blankline",
"illuminate",
"lsp",
"treesitter",
"syntax",
"matchparen",
"vimopts",
"filetype",
},
}
---@param bufnr number
---@return integer|nil size in MiB if buffer is valid, nil otherwise
local function get_buf_size(bufnr)
bufnr = bufnr or vim.api.nvim_get_current_buf()
local ok, stats = pcall(function()
return vim.loop.fs_stat(vim.api.nvim_buf_get_name(bufnr))
end)
if not (ok and stats) then
return
end
return math.floor(0.5 + (stats.size / (1024 * 1024)))
end
local function pre_bufread_callback(bufnr, rule)
local status_ok, _ = pcall(vim.api.nvim_buf_get_var, bufnr, "bigfile_detected")
if status_ok then
return -- buffer has already been processed
end
local filesize = get_buf_size(bufnr)
if not filesize or filesize < rule.filesize then
vim.api.nvim_buf_set_var(bufnr, "bigfile_detected", 0)
return
end
vim.api.nvim_buf_set_var(bufnr, "bigfile_detected", 1)
local matched_features = vim.tbl_map(function(feature)
return features.get_feature(feature)
end, rule.features)
-- Categorize features and disable features that don't need deferring
local matched_deferred_features = {}
for _, feature in ipairs(matched_features) do
if feature.opts.defer then
table.insert(matched_deferred_features, feature)
else
feature.disable(bufnr)
end
end
-- Schedule disabling deferred features
vim.api.nvim_create_autocmd({ "BufReadPost" }, {
callback = function()
for _, feature in ipairs(matched_deferred_features) do
feature.disable(bufnr)
end
end,
buffer = bufnr,
})
end
local function configure_treesitter_disable(cb, modules)
local status_ok, ts_config = pcall(require, "nvim-treesitter.configs")
if not status_ok then
return
end
modules = modules or ts_config.available_modules()
for _, mod_name in ipairs(modules) do
local module_config = ts_config.get_module(mod_name) or {}
module_config.disable = module_config.disable or {}
if type(module_config.disable) == "table" and #module_config.disable == 0 then
module_config.disable = cb
end
end
end
---@param overrides config|nil
function M.config(overrides)
default_config = vim.tbl_deep_extend("force", default_config, overrides or {})
end
---@param overrides config|nil
function M.setup(overrides)
local config = vim.tbl_deep_extend("force", default_config, overrides or {})
local augroup = vim.api.nvim_create_augroup("bigfile", {})
vim.api.nvim_create_autocmd("BufReadPre", {
pattern = config.pattern,
group = augroup,
callback = function(args)
pre_bufread_callback(args.buf, config)
end,
desc = string.format(
"[bigfile.nvim] Performance rule for handling files over %sMiB",
config.filesize
),
})
if vim.tbl_contains(config.features, "treesitter") then
local disable_cb = function(_, buf)
local status_ok, detected = pcall(vim.api.nvim_buf_get_var, buf, "bigfile_disable_treesitter")
return status_ok and detected
end
configure_treesitter_disable(disable_cb)
end
end
return M