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feat(health): report ulimit info

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Problem:
Nvim shows `(libuv) kqueue(): Too many open files` on macos.
ref https://github.com/neovim/neovim/issues/40238

Solution:
Add a healthcheck for this situation.
This commit is contained in:
Justin M. Keyes
2026-06-30 21:33:32 +02:00
parent d253acca35
commit 34efdadb4e
6 changed files with 143 additions and 84 deletions
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50
src/nvim/options.lua
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@@ -9071,24 +9071,20 @@ local options = {
cb = 'did_set_swapfile',
defaults = true,
desc = [=[
Use a swapfile for the buffer. This option can be reset when a
swapfile is not wanted for a specific buffer. For example, with
confidential information that even root must not be able to access.
Careful: All text will be in memory:
- Don't use this for big files.
- Recovery will be impossible!
A swapfile will only be present when 'updatecount' is non-zero and
'swapfile' is set.
When 'swapfile' is reset, the swap file for the current buffer is
immediately deleted. When 'swapfile' is set, and 'updatecount' is
non-zero, a swap file is immediately created.
Also see |swap-file|.
If you want to open a new buffer without creating a swap file for it,
use the |:noswapfile| modifier.
See 'directory' for where the swap file is created.
Use a |swap-file| for the buffer (if 'updatecount' is non-zero). The
'directory' option decides where swapfiles are stored.
This option is used together with 'bufhidden' and 'buftype' to
specify special kinds of buffers. See |special-buffers|.
To open a new buffer without creating a swapfile, use |:noswapfile|.
To disable for an existing buffer, reset its 'swapfile' option.
Careful:
- Recovery will be impossible!
- The entire file will be in memory.
When reset, the swapfile for the current buffer is immediately
deleted. When re-enabled (and 'updatecount' is non-zero), a swapfile
is immediately created.
Used with 'bufhidden' and 'buftype' to specify |special-buffers|.
]=],
full_name = 'swapfile',
redraw = { 'statuslines' },
@@ -9942,17 +9938,15 @@ local options = {
cb = 'did_set_updatecount',
defaults = 200,
desc = [=[
After typing this many characters the swap file will be written to
disk. When zero, no swap file will be created at all (see chapter on
recovery |crash-recovery|). 'updatecount' is set to zero by starting
Vim with the "-n" option, see |startup|. When editing in readonly
mode this option will be initialized to 10000.
The swapfile can be disabled per buffer with 'swapfile'.
When 'updatecount' is set from zero to non-zero, swap files are
created for all buffers that have 'swapfile' set. When 'updatecount'
is set to zero, existing swap files are not deleted.
This option has no meaning in buffers where 'buftype' is "nofile" or
"nowrite".
The |swap-file| will be written after typing this many characters.
- Ignored in buffers where 'buftype' is "nofile" or "nowrite".
- Initialized to 10000 when editing in readonly |-R| mode.
- To disable swapfiles per-buffer, unset the 'swapfile' option.
- To disable swapfiles globally, set this option to zero (or start
with |-n|). See |crash-recovery|. Existing swapfiles are not deleted.
- When re-enabled (from zero to non-zero), swapfiles are created for
all buffers that have 'swapfile' set.
]=],
full_name = 'updatecount',
scope = { 'global' },