Repository navigation
Expand file tree
/
Copy pathsessions.lua
More file actions
632 lines (525 loc) · 23.3 KB
/
Copy pathsessions.lua
File metadata and controls
632 lines (525 loc) · 23.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
--- *mini.sessions* Session management
---
--- MIT License Copyright (c) 2021 Evgeni Chasnovski
--- Read, write, and delete sessions. Uses |:mksession| (meaning 'sessionoptions'
--- is fully respected). This is intended as a drop-in Lua replacement for
--- [mhinz/vim-startify](https://github.com/mhinz/vim-startify) session management
--- (works out of the box with sessions created by it). Implements both global
--- (from configured directory) and local (from current directory) sessions.
---
--- Key design ideas:
--- - Sessions are represented by readable files (results of applying |:mksession|).
--- There are two kinds of sessions:
--- - Global: any file inside a configurable directory.
--- - Local: configurable file inside current working directory (|getcwd()|).
---
--- - All session files are detected during `MiniSessions.setup()` and during
--- relevant actions (`read`, `delete`, `select`) with file names as session
--- names (including possible extension).
---
--- - No automated new session creation. Use |MiniSessions.write()| manually.
---
--- - Store information about detected sessions in separate table
--- (|MiniSessions.detected|) and operate only on it. Meaning if this information
--- changes, there will be no effect until next detection. To avoid confusion,
--- don't directly use |:mksession| / |:source| for writing / reading session files.
---
--- Features:
--- - Autoread default session (local if detected, else latest written global) if
--- Neovim was called without intention to show something else.
---
--- - Autowrite currently read session before leaving it (quit Neovim or read
--- another session).
---
--- - Configurable
8000
severity level of all actions.
---
--- # Setup ~
---
--- This module needs a setup with `require('mini.sessions').setup({})`
--- (replace `{}` with your `config` table). It will create global Lua table
--- `MiniSessions` which you can use for scripting or manually (with
--- `:lua MiniSessions.*`).
---
--- See |MiniSessions.config| for `config` structure and default values.
---
--- This module doesn't benefit from buffer local configuration, so using
--- `vim.b.minisessions_config` will have no effect here.
---
--- # Disabling ~
---
--- To disable core functionality, set `vim.g.minisessions_disable` (globally) or
--- `vim.b.minisessions_disable` (for a buffer) to `true`. Considering high
--- number of different scenarios and customization intentions, writing exact
--- rules for disabling module's functionality is left to user. See
--- |mini.nvim-disabling-recipes| for common recipes.
---@tag MiniSessions
-- Module definition ==========================================================
local MiniSessions = {}
local H = {}
--- Module setup
---
---@param config table|nil Module config table. See |MiniSessions.config|.
---
---@usage >lua
--- require('mini.sessions').setup() -- use default config
--- -- OR
--- require('mini.sessions').setup({}) -- replace {} with your config table
--- <
MiniSessions.setup = function(config)
-- Export module
_G.MiniSessions = MiniSessions
-- Setup config
config = H.setup_config(config)
-- Apply config
H.apply_config(config)
-- Define behavior
H.create_autocommands(config)
end
--- Defaults ~
---@eval return MiniDoc.afterlines_to_code(MiniDoc.current.eval_section)
MiniSessions.config = {
-- Whether to read default session if Neovim opened without file arguments
autoread = false,
-- Whether to write currently read session before leaving it
autowrite = true,
-- Directory where global sessions are stored (use `''` to disable)
--minidoc_replace_start directory = --<"session" subdir of user data directory from |stdpath()|>,
directory = vim.fn.stdpath('data') .. '/session',
--minidoc_replace_end
-- File for local session (use `''` to disable)
file = 'Session.vim',
-- Whether to force possibly harmful actions (meaning depends on function)
force = { read = false, write = true, delete = false },
-- Hook functions for actions. Default `nil` means 'do nothing'.
-- Takes table with active session data as argument.
hooks = {
-- Before successful action
pre = { read = nil, write = nil, delete = nil },
-- After successful action
post = { read = nil, write = nil, delete = nil },
},
-- Whether to print session path after action
verbose = { read = false, write = true, delete = true },
}
--minidoc_afterlines_end
-- Module data ================================================================
--- Table of detected sessions. Keys represent session name. Values are tables
--- with session information that currently has these fields (but subject to
--- change):
--- - <modify_time> `(number)` modification time (see |getftime()|) of session file.
--- - <name> `(string)` name of session (should be equal to table key).
--- - <path> `(string)` full path to session file.
--- - <type> `(string)` type of session ('global' or 'local').
MiniSessions.detected = {}
-- Module functionality =======================================================
--- Read detected session
---
--- What it does:
--- - If there is an active session and `autowrite` is `true` in |MiniSessions.config|,
--- write it with |MiniSessions.write()|.
--- - Delete all current buffers with |:bwipeout|. This is needed to correctly
--- restore buffers from target session. If `force` is not `true`, checks
--- beforehand for unsaved listed buffers and stops if there are any.
--- - Source session with supplied name.
---
---@param session_name string|nil Name of detected session file to read. Default:
--- `nil` for default session: local (if detected) or latest session (see
--- |MiniSessions.get_latest()|).
---@param opts table|nil Table with options. Current allowed keys:
--- - <force> (whether to delete unsaved buffers; default:
--- `MiniSessions.config.force.read`).
--- - <verbose> (whether to print session path after action; default
--- `MiniSessions.config.verbose.read`).
--- - <hooks> (a table with <pre> and <post> function hooks to be executed
--- with session data argument before and after successful read; overrides
--- `MiniSessions.config.hooks.pre.read` and
--- `MiniSessions.config.hooks.post.read`).
MiniSessions.read = function(session_name, opts)
if H.is_disabled() then return end
-- Make sessions up to date
H.detect_sessions()
if vim.tbl_count(MiniSessions.detected) == 0 then
return H.message('There are no detected sessions. Change configuration and rerun `MiniSessions.setup()`.')
end
-- Get session data
if session_name == nil then
if MiniSessions.detected[MiniSessions.config.file] ~= nil then
session_name = MiniSessions.config.file
else
session_name = MiniSessions.get_latest()
end
end
opts = vim.tbl_deep_extend('force', H.default_opts('read'), opts or {})
if not H.validate_detected(session_name) then return end
local data = MiniSessions.detected[session_name]
-- Possibly check for unsaved listed buffers and do nothing if present
if not opts.force then
local unsaved_listed_buffers = H.get_unsaved_listed_buffers()
if #unsaved_listed_buffers > 0 then
local buf_list = table.concat(unsaved_listed_buffers, ', ')
H.error(('There are unsaved listed buffers: %s.'):format(buf_list))
end
end
-- Write current session to allow proper switching between sessions
if H.get_this_session() ~= '' and MiniSessions.config.autowrite then
MiniSessions.write(nil, { force = true, verbose = false })
end
-- Execute 'pre' hook
H.possibly_execute(opts.hooks.pre, data)
-- Wipeout all buffers
vim.cmd('silent! %bwipeout!')
-- Read session file
local session_path = data.path
vim.cmd(('silent! source %s'):format(vim.fn.fnameescape(session_path)))
vim.v.this_session = session_path
-- Possibly notify
if opts.verbose then H.message(('Read session %s'):format(session_path)) end
-- Ensure correct detected local session
H.detect_sessions()
-- Execute 'post' hook
H.possibly_execute(opts.hooks.post, data)
end
--- Write session
---
--- What it does:
--- - Check if file for supplied session name already exists. If it does and
--- `force` is not `true`, then stop.
--- - Write session with |:mksession| to a file named `session_name`. Its
--- directory is determined based on type of session:
--- - It is at location |v:this_session| if `session_name` is `nil` and
--- there is currently read session.
--- - It is current working directory (|getcwd()|) if `session_name` is equal
--- to `MiniSessions.config.file` (represents local session).
--- - It is `MiniSessions.config.directory` otherwise (represents global
--- session).
--- - Update |MiniSessions.detected|.
---
---@param session_name string|nil Name of session file to write. Default: `nil` for
--- currently read session (|v:this_session|).
---@param opts table|nil Table with options. Current allowed keys:
--- - <force> (whether to ignore existence of session file; default:
--- `MiniSessions.config.force.write`).
--- - <verbose> (whether to print session path after action; default
--- `MiniSessions.config.verbose.write`).
--- - <hooks> (a table with <pre> and <post> function hooks to be executed
--- with session data argument before and after successful write; overrides
--- `MiniSessions.config.hooks.pre.write` and
--- `MiniSessions.config.hooks.post.write`).
MiniSessions.write = function(session_name, opts)
if H.is_disabled() then return end
opts = vim.tbl_deep_extend('force', H.default_opts('write'), opts or {})
local session_path = H.name_to_path(session_name)
if not opts.force and H.is_readable_file(session_path) then
H.error([[Can't write to existing session when `opts.force` is not `true`.]])
end
local data = H.new_session(session_path)
-- Execute 'pre' hook
H.possibly_execute(opts.hooks.pre, data)
-- Make session file
local command = string.format('mksession%s %s', opts.force and '!' or '', vim.fn.fnameescape(session_path))
vim.cmd(command)
data.modify_time = vim.fn.getftime(session_path)
-- Update detected sessions
MiniSessions.detected[data.name] = data
-- Update current session
vim.v.this_session = session_path
-- Possibly notify
if opts.verbose then H.message(('Written session %s'):format(session_path)) end
-- Execute 'post' hook
H.possibly_execute(opts.hooks.post, data)
end
--- Delete detected session
---
--- What it does:
--- - Check if session name is a current one. If yes and `force` is not `true`,
--- then stop.
--- - Delete session.
--- - Update |MiniSessions.detected|.
---
---@param session_name string|nil Name of detected session file to delete. Default:
--- `nil` for name of currently read session (taken from |v:this_session|).
---@param opts table|nil Table with options. Current allowed keys:
--- - <force> (whether to allow deletion of current session; default:
--- `MiniSessions.config.force.delete`).
--- - <verbose> (whether to print session path after action; default
--- `MiniSessions.config.verbose.delete`).
<
8000
/div>--- - <hooks> (a table with <pre> and <post> function hooks to be executed
--- with session data argument before and after successful delete; overrides
--- `MiniSessions.config.hooks.pre.delete` and
--- `MiniSessions.config.hooks.post.delete`).
MiniSessions.delete = function(session_name, opts)
if H.is_disabled() then return end
if vim.tbl_count(MiniSessions.detected) == 0 then
H.error('There are no detected sessions. Change configuration and rerun `MiniSessions.setup()`.')
end
opts = vim.tbl_deep_extend('force', H.default_opts('delete'), opts or {})
local session_path = H.name_to_path(session_name)
-- Make sessions up to date
H.detect_sessions()
-- Make sure to delete only detected session (matters for local session)
session_name = vim.fn.fnamemodify(session_path, ':t')
if not H.validate_detected(session_name) then return end
session_path = MiniSessions.detected[session_name].path
local is_current_session = session_path == H.get_this_session()
if not opts.force and is_current_session then
H.error([[Can't delete current session when `opts.force` is not `true`.]])
end
local data = MiniSessions.detected[session_name]
-- Execute 'pre' hook
H.possibly_execute(opts.hooks.pre, data)
-- Delete and update detected sessions
vim.fn.delete(session_path)
MiniSessions.detected[session_name] = nil
if is_current_session then vim.v.this_session = '' end
-- Possibly notify
if opts.verbose then H.message(('Deleted session %s'):format(session_path)) end
-- Execute 'pre' hook
H.possibly_execute(opts.hooks.post, data)
end
--- Select session interactively and perform action
---
--- Note: this uses |vim.ui.select()| function. For more user-friendly
--- experience, override it (for example, see |MiniPick.ui_select()|).
---
---@param action string|nil Action to perform. Should be one of "read" (default),
--- "write", or "delete".
---@param opts table|nil Options for specified action.
MiniSessions.select = function(action, opts)
if not (type(vim.ui) == 'table' and type(vim.ui.select) == 'function') then
H.error('`MiniSessions.select()` requires `vim.ui.select()` function.')
end
action = action or 'read'
if not vim.tbl_contains({ 'read', 'write', 'delete' }, action) then
H.error("`action` should be one of 'read', 'write', or 'delete'.")
end
-- Make sessions up to date
H.detect_sessions()
-- Ensure consistent order of items
local detected = {}
for _, session in pairs(MiniSessions.detected) do
table.insert(detected, session)
end
local sort_fun = function(a, b)
-- Put local session first, others - increasing alphabetically
local a_name = a.type == 'local' and '' or a.name
local b_name = b.type == 'local' and '' or b.name
return a_name < b_name
end
table.sort(detected, sort_fun)
local detected_names = vim.tbl_map(function(x) return x.name end, detected)
vim.ui.select(detected_names, {
prompt = 'Select session to ' .. action,
format_item = function(x) return ('%s (%s)'):format(x, MiniSessions.detected[x].type) end,
}, function(item, idx)
if item == nil then return end
MiniSessions[action](item, opts)
end)
end
--- Get name of latest detected session
---
--- Latest session is the session with the latest modification time determined
--- by |getftime()|.
---
---@return string|nil Name of latest session or `nil` if there is no sessions.
MiniSessions.get_latest = function()
if vim.tbl_count(MiniSessions.detected) == 0 then return end
local latest_time, latest_name = -1, nil
for name, data in pairs(MiniSessions.detected) do
if data.modify_time > latest_time then
latest_time, latest_name = data.modify_time, name
end
end
return latest_name
end
-- Helper data ================================================================
-- Module default config
H.default_config = vim.deepcopy(MiniSessions.config)
-- Helper functionality =======================================================
-- Settings -------------------------------------------------------------------
H.setup_config = function(config)
H.check_type('config', config, 'table', true)
config = vim.tbl_deep_extend('force', vim.deepcopy(H.default_config), config or {})
H.check_type('autoread', config.autoread, 'boolean')
H.check_type('autowrite', config.autowrite, 'boolean')
H.check_type('directory', config.directory, 'string')
H.check_type('file', config.file, 'string')
H.check_type('force', config.force, 'table')
H.check_type('force.read', config.force.read, 'boolean')
H.check_type('force.write', config.force.write, 'boolean')
H.check_type('force.delete', config.force.delete, 'boolean')
H.check_type('hooks', config.hooks, 'table')
H.check_type('hooks.pre', config.hooks.pre, 'table')
H.check_type('hooks.pre.read', config.hooks.pre.read, 'function', true)
H.check_type('hooks.pre.write', config.hooks.pre.write, 'function', true)
H.check_type('hooks.pre.delete', config.hooks.pre.delete, 'function', true)
H.check_type('hooks.post', config.hooks.post, 'table')
H.check_type('hooks.post.read', config.hooks.post.read, 'function', true)
H.check_type('hooks.post.write', config.hooks.post.write, 'function', true)
H.check_type('hooks.post.delete', config.hooks.post.delete, 'function', true)
H.check_type('verbose', config.verbose, 'table')
H.check_type('verbose.read', config.verbose.read, 'boolean')
H.check_type('verbose.write', config.verbose.write, 'boolean')
H.check_type('verbose.delete', config.verbose.delete, 'boolean')
return config
end
H.apply_config = function(config)
MiniSessions.config = config
H.detect_sessions(config)
end
H.create_autocommands = function(config)
local gr = vim.api.nvim_create_augroup('MiniSessions', {})
if config.autoread then
local autoread = function()
if not H.is_something_shown() then MiniSessions.read() end
end
local opts = { group = gr, nested = true, callback = autoread, desc = 'Autoread latest session' }
vim.api.nvim_create_autocmd('VimEnter', opts)
end
if config.autowrite then
local autowrite = function()
if H.get_this_session() ~= '' then MiniSessions.write(nil, { force = true }) end
end
local opts = { group = gr, callback = autowrite, desc = 'Autowrite current session' }
vim.api.nvim_create_autocmd('VimLeavePre', opts)
end
end
H.is_disabled = function() return vim.g.minisessions_disable == true or vim.b.minisessions_disable == true end
H.get_config = function(config)
return vim.tbl_deep_extend('force', MiniSessions.config, vim.b.minisessions_config or {}, config or {})
end
-- Work with sessions ---------------------------------------------------------
H.detect_sessions = function(config)
config = H.get_config(config)
local res_global = config.directory == '' and {} or H.detect_sessions_global(config.directory)
local res_local = config.file == '' and {} or H.detect_sessions_local(config.file)
-- If there are both local and global session with same name, prefer local
MiniSessions.detected = vim.tbl_deep_extend('force', res_global, res_local)
end
H.detect_sessions_global = function(global_dir)
-- Ensure correct directory path: create if doesn't exist
global_dir = H.full_path(global_dir)
if vim.fn.isdirectory(global_dir) ~= 1 then
local ok, _ = pcall(vim.fn.mkdir, global_dir, 'p')
if not ok then
H.message(('%s is not a directory path.'):format(vim.inspect(global_dir)))
return {}
end
end
-- Find global sessions
local res = {}
for name in vim.fs.dir(global_dir) do
local f = global_dir .. '/' .. name
if H.is_readable_file(f) then
local s = H.new_session(f, 'global')
res[s.name] = s
end
end
return res
end
H.detect_sessions_local = function(local_file)
local f = vim.fn.getcwd() .. '/' .. local_file
if not H.is_readable_file(f) then return {} end
local s = H.new_session(f, 'local')
return { [s.name] = s }
end
H.new_session = function(session_path, session_type)
return {
modify_time = vim.fn.getftime(session_path),
name = vim.fn.fnamemodify(session_path, ':t'),
path = H.full_path(session_path),
type = session_type or H.get_session_type(session_path),
}
end
H.get_session_type = function(session_path)
if MiniSessions.config.directory == '' then return 'local' end
local session_dir = H.full_path(session_path)
local global_dir = H.full_path(MiniSessions.config.directory)
return session_dir == global_dir and 'global' or 'local'
end
H.validate_detected = function(session_name)
local is_detected = vim.tbl_contains(vim.tbl_keys(MiniSessions.detected), session_name)
if is_detected then return true end
H.error(('%s is not a name for detected session.'):format(vim.inspect(session_name)))
end
H.get_unsaved_listed_buffers = function()
return vim.tbl_filter(
function(buf_id) return vim.bo[buf_id].modified and vim.bo[buf_id].buflisted end,
vim.api.nvim_list_bufs()
)
end
H.get_this_session = function() return vim.fs.normalize(vim.v.this_session) end
H.name_to_path = function(session_name)
if session_name == nil then
local this_session = H.get_this_session()
if this_session == '' then H.error('There is no active session. Supply non-nil session name.') end
return this_session
end
session_name = tostring(session_name)
if session_name == '' then H.error('Supply non-empty session name.') end
local session_dir = (session_name == MiniSessions.config.file) and vim.fn.getcwd() or MiniSessions.config.directory
return H.full_path(session_dir .. '/' .. session_name)
end
-- Utilities ------------------------------------------------------------------
H.error = function(msg) error('(mini.sessions) ' .. msg, 0) end
H.check_type = function(name, val, ref, allow_nil)
if type(val) == ref or (ref == 'callable' and vim.is_callable(val)) or (allow_nil and val == nil) then return end
H.error(string.format('`%s` should be %s, not %s', name, ref, type(val)))
end
H.echo = function(msg, is_important)
-- Construct message chunks
msg = type(msg) == 'string' and { { msg } } or msg
table.insert(msg, 1, { '(mini.sessions) ', 'WarningMsg' })
-- Avoid hit-enter-prompt
local max_width = vim.o.columns * math.max(vim.o.cmdheight - 1, 0) + vim.v.echospace
local chunks, tot_width = {}, 0
for _, ch in ipairs(msg) do
local new_ch = { vim.fn.strcharpart(ch[1], 0, max_width - tot_width), ch[2] }
table.insert(chunks, new_ch)
tot_width = tot_width + vim.fn.strdisplaywidth(new_ch[1])
if tot_width >= max_width then break end
end
-- Echo. Force redraw to ensure that it is effective (`:h echo-redraw`)
vim.cmd([[echo '' | redraw]])
vim.api.nvim_echo(chunks, is_important, {})
end
H.message = function(msg) H.echo(msg, true) end
H.default_opts = function(action)
local config = MiniSessions.config
return {
force = config.force[action],
verbose = config.verbose[action],
hooks = { pre = config.hooks.pre[action], post = config.hooks.post[action] },
}
end
H.is_readable_file = function(path) return vim.fn.isdirectory(path) ~= 1 and vim.fn.getfperm(path):sub(1, 1) == 'r' end
H.full_path = function(path) return vim.fs.normalize(vim.fn.resolve(vim.fn.fnamemodify(path, ':p'))) end
H.is_something_shown = function()
-- Don't autoread session if Neovim is opened to show something. That is
-- when at least one of the following is true:
-- - There are files in arguments (like `nvim foo.txt` with new file).
if vim.fn.argc() > 0 then return true end
-- - Several buffers are listed (like session with placeholder buffers). That
-- means unlisted buffers (like from `nvim-tree`) don't affect decision.
local listed_buffers = vim.tbl_filter(
function(buf_id) return vim.fn.buflisted(buf_id) == 1 end,
vim.api.nvim_list_bufs()
)
if #listed_buffers > 1 then return true end
-- - Current buffer is meant to show something else
if vim.bo.filetype ~= '' then return true end
-- - Current buffer has any lines (something opened explicitly).
-- NOTE: Usage of `line2byte(line('$') + 1) < 0` seemed to be fine, but it
-- doesn't work if some automated changed was made to buffer while leaving it
-- empty (returns 2 instead of -1). This was also the reason of not being
-- able to test with child Neovim process from 'tests/helpers'.
local n_lines = vim.api.nvim_buf_line_count(0)
if n_lines > 1 then return true end
local first_line = vim.api.nvim_buf_get_lines(0, 0, 1, true)[1]
if string.len(first_line) > 0 then return true end
return false
end
H.possibly_execute = function(f, ...)
if f == nil then return end
return f(...)
end
return MiniSessions