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|
local M = {}
---@class (exact) conform.FormatterInfo
---@field name string
---@field command string
---@field cwd? string
---@field available boolean
---@field available_msg? string
---@class (exact) conform.JobFormatterConfig
---@field command string|fun(ctx: conform.Context): string
---@field args? string|string[]|fun(ctx: conform.Context): string|string[]
---@field range_args? fun(ctx: conform.RangeContext): string|string[]
---@field cwd? fun(ctx: conform.Context): nil|string
---@field require_cwd? boolean When cwd is not found, don't run the formatter (default false)
---@field stdin? boolean Send buffer contents to stdin (default true)
---@field condition? fun(ctx: conform.Context): boolean
---@field exit_codes? integer[] Exit codes that indicate success (default {0})
---@field env? table<string, any>|fun(ctx: conform.Context): table<string, any>
---@class (exact) conform.LuaFormatterConfig
---@field format fun(self: conform.LuaFormatterConfig, ctx: conform.Context, lines: string[], callback: fun(err: nil|string, new_lines: nil|string[]))
---@field condition? fun(self: conform.LuaFormatterConfig, ctx: conform.Context): boolean
---@field options? table
---@class (exact) conform.FileLuaFormatterConfig : conform.LuaFormatterConfig
---@field meta conform.FormatterMeta
---@class (exact) conform.FileFormatterConfig : conform.JobFormatterConfig
---@field meta conform.FormatterMeta
---@alias conform.FormatterConfig conform.JobFormatterConfig|conform.LuaFormatterConfig
---@class (exact) conform.FormatterConfigOverride : conform.JobFormatterConfig
---@field inherit? boolean
---@field command? string|fun(ctx: conform.Context): string
---@field prepend_args? string|string[]|fun(ctx: conform.Context): string|string[]
---@field options? table
---@class (exact) conform.FormatterMeta
---@field url string
---@field description string
---@field deprecated? boolean
---@class (exact) conform.Context
---@field buf integer
---@field filename string
---@field dirname string
---@field range? conform.Range
---@class (exact) conform.RangeContext : conform.Context
---@field range conform.Range
---@class (exact) conform.Range
---@field start integer[]
---@field end integer[]
---@alias conform.FormatterUnit string|string[]
---@alias conform.FiletypeFormatter conform.FormatterUnit[]|fun(bufnr: integer): string[]
---@type table<string, conform.FiletypeFormatter>
M.formatters_by_ft = {}
---@type table<string, conform.FormatterConfigOverride|fun(bufnr: integer): nil|conform.FormatterConfigOverride>
M.formatters = {}
M.notify_on_error = true
M.setup = function(opts)
opts = opts or {}
M.formatters = vim.tbl_extend("force", M.formatters, opts.formatters or {})
M.formatters_by_ft = vim.tbl_extend("force", M.formatters_by_ft, opts.formatters_by_ft or {})
if opts.log_level then
require("conform.log").level = opts.log_level
end
if opts.notify_on_error ~= nil then
M.notify_on_error = opts.notify_on_error
end
local aug = vim.api.nvim_create_augroup("Conform", { clear = true })
if opts.format_on_save then
if type(opts.format_on_save) == "boolean" then
opts.format_on_save = {}
end
vim.api.nvim_create_autocmd("BufWritePre", {
desc = "Format on save",
pattern = "*",
group = aug,
callback = function(args)
if not vim.api.nvim_buf_is_valid(args.buf) or vim.bo[args.buf].buftype ~= "" then
return
end
local format_args, callback = opts.format_on_save, nil
if type(format_args) == "function" then
format_args, callback = format_args(args.buf)
end
if format_args then
M.format(
vim.tbl_deep_extend("force", format_args, {
buf = args.buf,
async = false,
}),
callback
)
end
end,
})
vim.api.nvim_create_autocmd("VimLeavePre", {
desc = "conform.nvim hack to work around Neovim bug",
pattern = "*",
group = aug,
callback = function()
-- HACK: Work around https://github.com/neovim/neovim/issues/21856
-- causing exit code 134 on :wq
vim.cmd.sleep({ args = { "1m" } })
end,
})
end
if opts.format_after_save then
if type(opts.format_after_save) == "boolean" then
opts.format_after_save = {}
end
local exit_timeout = 1000
local num_running_format_jobs = 0
vim.api.nvim_create_autocmd("BufWritePost", {
desc = "Format after save",
pattern = "*",
group = aug,
callback = function(args)
if
not vim.api.nvim_buf_is_valid(args.buf)
or vim.b[args.buf].conform_applying_formatting
or vim.bo[args.buf].buftype ~= ""
then
return
end
local format_args, callback = opts.format_after_save, nil
if type(format_args) == "function" then
format_args, callback = format_args(args.buf)
end
if format_args then
exit_timeout = format_args.timeout_ms or exit_timeout
num_running_format_jobs = num_running_format_jobs + 1
M.format(
vim.tbl_deep_extend("force", format_args, {
buf = args.buf,
async = true,
}),
function(err)
num_running_format_jobs = num_running_format_jobs - 1
if not err and vim.api.nvim_buf_is_valid(args.buf) then
vim.api.nvim_buf_call(args.buf, function()
vim.b[args.buf].conform_applying_formatting = true
vim.cmd.update()
vim.b[args.buf].conform_applying_formatting = false
end)
end
if callback then
callback(err)
end
end
)
end
end,
})
vim.api.nvim_create_autocmd("BufWinLeave", {
desc = "conform.nvim store changedtick for use during Neovim exit",
pattern = "*",
group = aug,
callback = function(args)
-- We store this because when vim is exiting it will set changedtick = -1 for visible
-- buffers right after firing BufWinLeave
vim.b[args.buf].last_changedtick = vim.api.nvim_buf_get_changedtick(args.buf)
end,
})
vim.api.nvim_create_autocmd("VimLeavePre", {
desc = "conform.nvim wait for running formatters before exit",
pattern = "*",
group = aug,
callback = function()
if num_running_format_jobs == 0 then
return
end
local uv = vim.uv or vim.loop
local start = uv.hrtime() / 1e6
vim.wait(exit_timeout, function()
return num_running_format_jobs == 0
end, 10)
local elapsed = uv.hrtime() / 1e6 - start
if elapsed > 200 then
local log = require("conform.log")
log.warn("Delayed Neovim exit by %dms to wait for formatting to complete", elapsed)
end
-- HACK: Work around https://github.com/neovim/neovim/issues/21856
-- causing exit code 134 on :wq
vim.cmd.sleep({ args = { "1m" } })
end,
})
end
vim.api.nvim_create_user_command("ConformInfo", function()
require("conform.health").show_window()
end, { desc = "Show information about Conform formatters" })
end
---Get the configured formatter filetype for a buffer
---@param bufnr? integer
---@return nil|string filetype or nil if no formatter is configured
local function get_matching_filetype(bufnr)
if not bufnr or bufnr == 0 then
bufnr = vim.api.nvim_get_current_buf()
end
local filetypes = vim.split(vim.bo[bufnr].filetype, ".", { plain = true })
table.insert(filetypes, "_")
for _, filetype in ipairs(filetypes) do
local ft_formatters = M.formatters_by_ft[filetype]
if ft_formatters then
return filetype
end
end
end
---@private
---@param bufnr? integer
---@return conform.FormatterUnit[]
M.list_formatters_for_buffer = function(bufnr)
if not bufnr or bufnr == 0 then
bufnr = vim.api.nvim_get_current_buf()
end
local formatters = {}
local seen = {}
local function dedupe_formatters(names, collect)
for _, name in ipairs(names) do
if type(name) == "table" then
local alternation = {}
dedupe_formatters(name, alternation)
if not vim.tbl_isempty(alternation) then
table.insert(collect, alternation)
end
elseif not seen[name] then
table.insert(collect, name)
seen[name] = true
end
end
end
local filetypes = {}
local matching_filetype = get_matching_filetype(bufnr)
if matching_filetype then
table.insert(filetypes, matching_filetype)
end
table.insert(filetypes, "*")
for _, ft in ipairs(filetypes) do
local ft_formatters = M.formatters_by_ft[ft]
if ft_formatters then
if type(ft_formatters) == "function" then
dedupe_formatters(ft_formatters(bufnr), formatters)
else
-- support the old structure where formatters could be a subkey
if not vim.tbl_islist(ft_formatters) then
vim.notify_once(
"Using deprecated structure for formatters_by_ft. See :help conform-options for details.",
vim.log.levels.ERROR
)
---@diagnostic disable-next-line: undefined-field
ft_formatters = ft_formatters.formatters
end
dedupe_formatters(ft_formatters, formatters)
end
end
end
return formatters
end
---@param bufnr integer
---@param mode "v"|"V"
---@return table {start={row,col}, end={row,col}} using (1, 0) indexing
local function range_from_selection(bufnr, mode)
-- [bufnum, lnum, col, off]; both row and column 1-indexed
local start = vim.fn.getpos("v")
local end_ = vim.fn.getpos(".")
local start_row = start[2]
local start_col = start[3]
local end_row = end_[2]
local end_col = end_[3]
-- A user can start visual selection at the end and move backwards
-- Normalize the range to start < end
if start_row == end_row and end_col < start_col then
end_col, start_col = start_col, end_col
elseif end_row < start_row then
start_row, end_row = end_row, start_row
start_col, end_col = end_col, start_col
end
if mode == "V" then
start_col = 1
local lines = vim.api.nvim_buf_get_lines(bufnr, end_row - 1, end_row, true)
end_col = #lines[1]
end
return {
["start"] = { start_row, start_col - 1 },
["end"] = { end_row, end_col - 1 },
}
end
---@private
---@param names conform.FormatterUnit[]
---@param bufnr integer
---@param warn_on_missing boolean
---@return conform.FormatterInfo[]
M.resolve_formatters = function(names, bufnr, warn_on_missing)
local all_info = {}
local function add_info(info, warn)
if info.available then
table.insert(all_info, info)
elseif warn then
vim.notify(
string.format("Formatter '%s' unavailable: %s", info.name, info.available_msg),
vim.log.levels.WARN
)
end
return info.available
end
for _, name in ipairs(names) do
if type(name) == "string" then
local info = M.get_formatter_info(name, bufnr)
add_info(info, warn_on_missing)
else
-- If this is an alternation, take the first one that's available
for i, v in ipairs(name) do
local info = M.get_formatter_info(v, bufnr)
if add_info(info, warn_on_missing and i == #name) then
break
end
end
end
end
return all_info
end
---Format a buffer
---@param opts? table
--- timeout_ms nil|integer Time in milliseconds to block for formatting. Defaults to 1000. No effect if async = true.
--- bufnr nil|integer Format this buffer (default 0)
--- async nil|boolean If true the method won't block. Defaults to false. If the buffer is modified before the formatter completes, the formatting will be discarded.
--- formatters nil|string[] List of formatters to run. Defaults to all formatters for the buffer filetype.
--- lsp_fallback nil|boolean|"always" Attempt LSP formatting if no formatters are available. Defaults to false. If "always", will attempt LSP formatting even if formatters are available.
--- quiet nil|boolean Don't show any notifications for warnings or failures. Defaults to false.
--- range nil|table Range to format. Table must contain `start` and `end` keys with {row, col} tuples using (1,0) indexing. Defaults to current selection in visual mode
--- id nil|integer Passed to |vim.lsp.buf.format| when lsp_fallback = true
--- name nil|string Passed to |vim.lsp.buf.format| when lsp_fallback = true
--- filter nil|fun(client: table): boolean Passed to |vim.lsp.buf.format| when lsp_fallback = true
---@param callback? fun(err: nil|string) Called once formatting has completed
---@return boolean True if any formatters were attempted
M.format = function(opts, callback)
---@type {timeout_ms: integer, bufnr: integer, async: boolean, lsp_fallback: boolean|"always", quiet: boolean, formatters?: string[], range?: conform.Range}
opts = vim.tbl_extend("keep", opts or {}, {
timeout_ms = 1000,
bufnr = 0,
async = false,
lsp_fallback = false,
quiet = false,
})
local mode = vim.api.nvim_get_mode().mode
if not opts.range and mode == "v" or mode == "V" then
opts.range = range_from_selection(opts.bufnr, mode)
end
callback = callback or function(_err) end
local errors = require("conform.errors")
local log = require("conform.log")
local lsp_format = require("conform.lsp_format")
local runner = require("conform.runner")
local explicit_formatters = opts.formatters ~= nil
local formatter_names = opts.formatters or M.list_formatters_for_buffer(opts.bufnr)
local formatters =
M.resolve_formatters(formatter_names, opts.bufnr, not opts.quiet and explicit_formatters)
local any_formatters = not vim.tbl_isempty(formatters)
if not explicit_formatters and opts.lsp_fallback == true and M.will_fallback_lsp(opts) then
-- use the LSP formatter when the configured formatters are from the fallback "_" filetype
any_formatters = false
else
local resolved_names = vim.tbl_map(function(f)
return f.name
end, formatters)
log.debug("Running formatters on %s: %s", vim.api.nvim_buf_get_name(opts.bufnr), resolved_names)
end
if any_formatters then
---@param err? conform.Error
local function handle_err(err)
if err then
local level = errors.level_for_code(err.code)
log.log(level, err.message)
local should_notify = not opts.quiet and level >= vim.log.levels.WARN
-- Execution errors have special handling. Maybe should reconsider this.
local notify_msg = err.message
if errors.is_execution_error(err.code) then
should_notify = should_notify and M.notify_on_error and not err.debounce_message
notify_msg = "Formatter failed. See :ConformInfo for details"
end
if should_notify then
vim.notify(notify_msg, level)
end
end
local err_message = err and err.message
if not err_message and not vim.api.nvim_buf_is_valid(opts.bufnr) then
err_message = "buffer was deleted"
end
if err_message then
return callback(err_message)
end
if
opts.lsp_fallback == "always" and not vim.tbl_isempty(lsp_format.get_format_clients(opts))
then
log.debug("Running LSP formatter on %s", vim.api.nvim_buf_get_name(opts.bufnr))
lsp_format.format(opts, callback)
else
callback()
end
end
local run_opts = { exclusive = true }
if opts.async then
runner.format_async(opts.bufnr, formatters, opts.range, run_opts, handle_err)
else
local err = runner.format_sync(opts.bufnr, formatters, opts.timeout_ms, opts.range, run_opts)
handle_err(err)
end
return true
elseif opts.lsp_fallback and not vim.tbl_isempty(lsp_format.get_format_clients(opts)) then
log.debug("Running LSP formatter on %s", vim.api.nvim_buf_get_name(opts.bufnr))
lsp_format.format(opts, callback)
return true
else
local level = vim.tbl_isempty(formatter_names) and "debug" or "warn"
log[level]("No formatters found for %s", vim.api.nvim_buf_get_name(opts.bufnr))
callback("No formatters found for buffer")
return false
end
end
---Process lines with formatters
---@private
---@param formatter_names string[]
---@param lines string[]
---@param opts? table
--- timeout_ms nil|integer Time in milliseconds to block for formatting. Defaults to 1000. No effect if async = true.
--- bufnr nil|integer use this as the working buffer (default 0)
--- async nil|boolean If true the method won't block. Defaults to false. If the buffer is modified before the formatter completes, the formatting will be discarded.
--- quiet nil|boolean Don't show any notifications for warnings or failures. Defaults to false.
---@param callback? fun(err: nil|conform.Error, lines: nil|string[]) Called once formatting has completed
---@return nil|conform.Error error Only present if async = false
---@return nil|string[] new_lines Only present if async = false
M.format_lines = function(formatter_names, lines, opts, callback)
---@type {timeout_ms: integer, bufnr: integer, async: boolean, quiet: boolean}
opts = vim.tbl_extend("keep", opts or {}, {
timeout_ms = 1000,
bufnr = 0,
async = false,
quiet = false,
})
callback = callback or function(_err, _lines) end
local errors = require("conform.errors")
local log = require("conform.log")
local runner = require("conform.runner")
local formatters = M.resolve_formatters(formatter_names, opts.bufnr, not opts.quiet)
if vim.tbl_isempty(formatters) then
callback(nil, lines)
return
end
---@param err? conform.Error
---@param new_lines? string[]
local function handle_err(err, new_lines)
if err then
local level = errors.level_for_code(err.code)
log.log(level, err.message)
end
callback(err, new_lines)
end
local run_opts = { exclusive = false }
if opts.async then
runner.format_lines_async(opts.bufnr, formatters, nil, lines, run_opts, handle_err)
else
local err, new_lines =
runner.format_lines_sync(opts.bufnr, formatters, opts.timeout_ms, nil, lines, run_opts)
handle_err(err, new_lines)
return err, new_lines
end
end
---Retrieve the available formatters for a buffer
---@param bufnr? integer
---@return conform.FormatterInfo[]
M.list_formatters = function(bufnr)
if not bufnr or bufnr == 0 then
bufnr = vim.api.nvim_get_current_buf()
end
local formatters = M.list_formatters_for_buffer(bufnr)
return M.resolve_formatters(formatters, bufnr, false)
end
---List information about all filetype-configured formatters
---@return conform.FormatterInfo[]
M.list_all_formatters = function()
local formatters = {}
for _, ft_formatters in pairs(M.formatters_by_ft) do
if type(ft_formatters) == "function" then
ft_formatters = ft_formatters(0)
end
-- support the old structure where formatters could be a subkey
if not vim.tbl_islist(ft_formatters) then
vim.notify_once(
"Using deprecated structure for formatters_by_ft. See :help conform-options for details.",
vim.log.levels.ERROR
)
---@diagnostic disable-next-line: undefined-field
ft_formatters = ft_formatters.formatters
end
for _, formatter in ipairs(ft_formatters) do
if type(formatter) == "table" then
for _, v in ipairs(formatter) do
formatters[v] = true
end
else
formatters[formatter] = true
end
end
end
---@type conform.FormatterInfo[]
local all_info = {}
for formatter in pairs(formatters) do
local info = M.get_formatter_info(formatter)
table.insert(all_info, info)
end
table.sort(all_info, function(a, b)
return a.name < b.name
end)
return all_info
end
---@private
---@param formatter string
---@param bufnr? integer
---@return nil|conform.FormatterConfig
M.get_formatter_config = function(formatter, bufnr)
if not bufnr or bufnr == 0 then
bufnr = vim.api.nvim_get_current_buf()
end
---@type nil|conform.FormatterConfigOverride|fun(bufnr: integer): nil|conform.FormatterConfigOverride
local override = M.formatters[formatter]
if type(override) == "function" then
override = override(bufnr)
end
---@type nil|conform.FormatterConfig
local config = override
if not override or override.inherit ~= false then
local ok, mod_config = pcall(require, "conform.formatters." .. formatter)
if ok then
if override then
config = require("conform.util").merge_formatter_configs(mod_config, override)
else
config = mod_config
end
elseif override then
if override.command then
config = override
else
local msg = string.format(
"Formatter '%s' missing built-in definition\nSet `command` to get rid of this error.",
formatter
)
vim.notify_once(msg, vim.log.levels.ERROR)
return nil
end
else
return nil
end
end
if config and config.stdin == nil then
config.stdin = true
end
return config
end
---Get information about a formatter (including availability)
---@param formatter string The name of the formatter
---@param bufnr? integer
---@return conform.FormatterInfo
M.get_formatter_info = function(formatter, bufnr)
if not bufnr or bufnr == 0 then
bufnr = vim.api.nvim_get_current_buf()
end
local config = M.get_formatter_config(formatter, bufnr)
if not config then
return {
name = formatter,
command = formatter,
available = false,
available_msg = "No config found",
}
end
local ctx = require("conform.runner").build_context(bufnr, config)
local available = true
local available_msg = nil
if config.format then
---@cast config conform.LuaFormatterConfig
if config.condition and not config:condition(ctx) then
available = false
available_msg = "Condition failed"
end
return {
name = formatter,
command = formatter,
available = available,
available_msg = available_msg,
}
end
local command = config.command
if type(command) == "function" then
command = command(ctx)
end
if vim.fn.executable(command) == 0 then
available = false
available_msg = "Command not found"
elseif config.condition and not config.condition(ctx) then
available = false
available_msg = "Condition failed"
end
local cwd = nil
if config.cwd then
cwd = config.cwd(ctx)
if available and not cwd and config.require_cwd then
available = false
available_msg = "Root directory not found"
end
end
---@type conform.FormatterInfo
return {
name = formatter,
command = command,
cwd = cwd,
available = available,
available_msg = available_msg,
}
end
---Check if the buffer will use LSP formatting when lsp_fallback = true
---@param options? table Options passed to |vim.lsp.buf.format|
---@return boolean
M.will_fallback_lsp = function(options)
options = options or {}
if not options.bufnr or options.bufnr == 0 then
options.bufnr = vim.api.nvim_get_current_buf()
end
local matching_filetype = get_matching_filetype(options.bufnr)
local has_primary_formatters = matching_filetype and matching_filetype ~= "_"
local lsp_clients = require("conform.lsp_format").get_format_clients(options)
return not has_primary_formatters and not vim.tbl_isempty(lsp_clients)
end
M.formatexpr = function(opts)
local lsp_format = require("conform.lsp_format")
-- Change the defaults slightly from conform.format
opts = vim.tbl_deep_extend("keep", opts or {}, {
timeout_ms = 500,
lsp_fallback = true,
})
-- Force async = false
opts.async = false
if vim.tbl_contains({ "i", "R", "ic", "ix" }, vim.fn.mode()) then
-- `formatexpr` is also called when exceeding `textwidth` in insert mode
-- fall back to internal formatting
return 1
end
local start_lnum = vim.v.lnum
local end_lnum = start_lnum + vim.v.count - 1
if start_lnum <= 0 or end_lnum <= 0 then
return 0
end
local end_line = vim.fn.getline(end_lnum)
local end_col = end_line:len()
opts.range = {
start = { start_lnum, 0 },
["end"] = { end_lnum, end_col },
}
if M.format(opts) then
return 0
elseif opts.lsp_fallback and not vim.tbl_isempty(lsp_format.get_format_clients(opts)) then
-- No formatters were available; fall back to lsp formatter
return vim.lsp.formatexpr({ timeout_ms = opts.timeout_ms })
else
return 1
end
end
return M
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