1 +
local M = {}
2 + 3 +
M.properties = {}
4 + 5 +
--- Modified version of the builtin assert that does not include error position information
6 +
---
7 +
---@param v any Condition
8 +
---@param message string Error message to display if condition is false or nil
9 +
---@return any v if not false or nil, otherwise an error is displayed
10 +
---
11 +
---@private
12 +
local function assert(v, message)
13 +
return v or error(message, 0)
14 +
end
15 + 16 +
--- Show a warning message
17 +
---
18 +
---@param msg string Message to show
19 +
---
20 +
---@private
21 +
local function warn(msg, ...)
22 +
vim.notify(string.format(msg, ...), vim.log.levels.WARN, {
23 +
title = 'editorconfig',
24 +
})
25 +
end
26 + 27 +
function M.properties.charset(bufnr, val)
28 +
assert(
29 +
vim.tbl_contains({ 'utf-8', 'utf-8-bom', 'latin1', 'utf-16be', 'utf-16le' }, val),
30 +
'charset must be one of "utf-8", "utf-8-bom", "latin1", "utf-16be", or "utf-16le"'
31 +
)
32 +
if val == 'utf-8' or val == 'utf-8-bom' then
33 +
vim.bo[bufnr].fileencoding = 'utf-8'
34 +
vim.bo[bufnr].bomb = val == 'utf-8-bom'
35 +
elseif val == 'utf-16be' then
36 +
vim.bo[bufnr].fileencoding = 'utf-16'
37 +
else
38 +
vim.bo[bufnr].fileencoding = val
39 +
end
40 +
end
41 + 42 +
function M.properties.end_of_line(bufnr, val)
43 +
vim.bo[bufnr].fileformat = assert(
44 +
({ lf = 'unix', crlf = 'dos', cr = 'mac' })[val],
45 +
'end_of_line must be one of "lf", "crlf", or "cr"'
46 +
)
47 +
end
48 + 49 +
function M.properties.indent_style(bufnr, val, opts)
50 +
assert(val == 'tab' or val == 'space', 'indent_style must be either "tab" or "space"')
51 +
vim.bo[bufnr].expandtab = val == 'space'
52 +
if val == 'tab' and not opts.indent_size then
53 +
vim.bo[bufnr].shiftwidth = 0
54 +
vim.bo[bufnr].softtabstop = 0
55 +
end
56 +
end
57 + 58 +
function M.properties.indent_size(bufnr, val, opts)
59 +
if val == 'tab' then
60 +
vim.bo[bufnr].shiftwidth = 0
61 +
vim.bo[bufnr].softtabstop = 0
62 +
else
63 +
local n = assert(tonumber(val), 'indent_size must be a number')
64 +
vim.bo[bufnr].shiftwidth = n
65 +
vim.bo[bufnr].softtabstop = -1
66 +
if not opts.tab_width then
67 +
vim.bo[bufnr].tabstop = n
68 +
end
69 +
end
70 +
end
71 + 72 +
function M.properties.tab_width(bufnr, val)
73 +
vim.bo[bufnr].tabstop = assert(tonumber(val), 'tab_width must be a number')
74 +
end
75 + 76 +
function M.properties.max_line_length(bufnr, val)
77 +
local n = tonumber(val)
78 +
if n then
79 +
vim.bo[bufnr].textwidth = n
80 +
else
81 +
assert(val == 'off', 'max_line_length must be a number or "off"')
82 +
vim.bo[bufnr].textwidth = 0
83 +
end
84 +
end
85 + 86 +
function M.properties.trim_trailing_whitespace(bufnr, val)
87 +
assert(
88 +
val == 'true' or val == 'false',
89 +
'trim_trailing_whitespace must be either "true" or "false"'
90 +
)
91 +
if val == 'true' then
92 +
vim.api.nvim_create_autocmd('BufWritePre', {
93 +
group = 'editorconfig',
94 +
buffer = bufnr,
95 +
callback = function()
96 +
local view = vim.fn.winsaveview()
97 +
vim.api.nvim_command('silent! undojoin')
98 +
vim.api.nvim_command('silent keepjumps keeppatterns %s/\\s\\+$//e')
99 +
vim.fn.winrestview(view)
100 +
end,
101 +
})
102 +
else
103 +
vim.api.nvim_clear_autocmds({
104 +
event = 'BufWritePre',
105 +
group = 'editorconfig',
106 +
buffer = bufnr,
107 +
})
108 +
end
109 +
end
110 + 111 +
function M.properties.insert_final_newline(bufnr, val)
112 +
assert(val == 'true' or val == 'false', 'insert_final_newline must be either "true" or "false"')
113 +
vim.bo[bufnr].fixendofline = val == 'true'
114 +
vim.bo[bufnr].endofline = val == 'true'
115 +
end
116 + 117 +
--- Modified version of |glob2regpat()| that does not match path separators on *.
118 +
---
119 +
--- This function replaces single instances of * with the regex pattern [^/]*. However, the star in
120 +
--- the replacement pattern also gets interpreted by glob2regpat, so we insert a placeholder, pass
121 +
--- it through glob2regpat, then replace the placeholder with the actual regex pattern.
122 +
---
123 +
---@param glob string Glob to convert into a regular expression
124 +
---@return string Regular expression
125 +
---
126 +
---@private
127 +
local function glob2regpat(glob)
128 +
local placeholder = '@@PLACEHOLDER@@'
129 +
return (
130 +
string.gsub(
131 +
vim.fn.glob2regpat(
132 +
vim.fn.substitute(
133 +
string.gsub(glob, '{(%d+)%.%.(%d+)}', '[%1-%2]'),
134 +
'\\*\\@<!\\*\\*\\@!',
135 +
placeholder,
136 +
'g'
137 +
)
138 +
),
139 +
placeholder,
140 +
'[^/]*'
141 +
)
142 +
)
143 +
end
144 + 145 +
--- Parse a single line in an EditorConfig file
146 +
---
147 +
---@param line string Line
148 +
---@return string|nil If the line contains a pattern, the glob pattern
149 +
---@return string|nil If the line contains a key-value pair, the key
150 +
---@return string|nil If the line contains a key-value pair, the value
151 +
---
152 +
---@private
153 +
local function parse_line(line)
154 +
if line:find('^%s*[^ #;]') then
155 +
local glob = (line:match('%b[]') or ''):match('^%s*%[(.*)%]%s*$')
156 +
if glob then
157 +
return glob, nil, nil
158 +
end
159 + 160 +
local key, val = line:match('^%s*([^:= ][^:=]-)%s*[:=]%s*(.-)%s*$')
161 +
if key ~= nil and val ~= nil then
162 +
return nil, key:lower(), val:lower()
163 +
end
164 +
end
165 +
end
166 + 167 +
--- Parse options from an .editorconfig file
168 +
---
169 +
---@param filepath string File path of the file to apply EditorConfig settings to
170 +
---@param dir string Current directory
171 +
---@return table Table of options to apply to the given file
172 +
---
173 +
---@private
174 +
local function parse(filepath, dir)
175 +
local pat = nil
176 +
local opts = {}
177 +
local f = io.open(dir .. '/.editorconfig')
178 +
if f then
179 +
for line in f:lines() do
180 +
local glob, key, val = parse_line(line)
181 +
if glob then
182 +
glob = glob:find('/') and (dir .. '/' .. glob:gsub('^/', '')) or ('**/' .. glob)
183 +
local ok, regpat = pcall(glob2regpat, glob)
184 +
if ok then
185 +
pat = vim.regex(regpat)
186 +
else
187 +
pat = nil
188 +
warn('editorconfig: Error occurred while parsing glob pattern "%s": %s', glob, regpat)
189 +
end
190 +
elseif key ~= nil and val ~= nil then
191 +
if key == 'root' then
192 +
opts.root = val == 'true'
193 +
elseif pat and pat:match_str(filepath) then
194 +
opts[key] = val
195 +
end
196 +
end
197 +
end
198 +
f:close()
199 +
end
200 +
return opts
201 +
end
202 + 203 +
--- Configure the given buffer with options from an .editorconfig file
204 +
---
205 +
---@param bufnr number Buffer number to configure
206 +
---
207 +
---@private
208 +
function M.config(bufnr)
209 +
bufnr = bufnr or vim.api.nvim_get_current_buf()
210 +
local path = vim.fs.normalize(vim.api.nvim_buf_get_name(bufnr))
211 +
if vim.bo[bufnr].buftype ~= '' or not vim.bo[bufnr].modifiable or path == '' then
212 +
return
213 +
end
214 + 215 +
local opts = {}
216 +
for parent in vim.fs.parents(path) do
217 +
for k, v in pairs(parse(path, parent)) do
218 +
if opts[k] == nil then
219 +
opts[k] = v
220 +
end
221 +
end
222 + 223 +
if opts.root then
224 +
break
225 +
end
226 +
end
227 + 228 +
local applied = {}
229 +
for opt, val in pairs(opts) do
230 +
if val ~= 'unset' then
231 +
local func = M.properties[opt]
232 +
if func then
233 +
local ok, err = pcall(func, bufnr, val, opts)
234 +
if ok then
235 +
applied[opt] = val
236 +
else
237 +
warn('editorconfig: invalid value for option %s: %s. %s', opt, val, err)
238 +
end
239 +
end
240 +
end
241 +
end
242 + 243 +
vim.b[bufnr].editorconfig = applied
244 +
end
245 + 246 +
return M
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