Framed info boxes need one cell for the border and one for inner
space padding. That's 4 extra columns when counting both sides.
Frameless boxes have neither border nor padding so 0 columns here.
Closes#5106
Commit e43c7d6ab (Use complete-command for the :doc command,
2022-10-19) forgot to carry over the "-menu" flag, which means that
:doc completions are no longer auto-selected, even though they are
the only valid inputs.
Fix that.
Closes#4790
This sometimes allocates saves too eagerly, but it removes a branch
in release saves that executes on every thread failing which seems
slightly better.
When creating a new save, we had to clear all iterators to have valid
values. This operation is relatively costly because it gets optimized
to a memset whose call overhead is pretty high (as we usually have
less than 32 bytes to clear). Bypass this by storing a bitmap of
valid iterators.
Consider
sh -c 'sleep 5 & sleep inf'
Since the shell is non-interactive, there is no job control.
This makes the shell spawn the "sleep 5" process in the shell's own
process group[1] - presumably, because only interactive shells have
a need to forward signals to all processes in its foreground job.
When this non-interactive shell process is cancelled with SIGINT,
"sleep 5" keeps running [2]. At least the dash shell implements this
by running "signal(SIGINT, SIG_IGN)" in the forked child. Unless the
child process explicitly overrides that (to SIG_DFL for example), it
will ignore SIGINT. Probably the reason for this behavior is to feign
consistency with interactive shells, without needing to actually run
background jobs in a dedicated process group like interactive shells
do. Bash documents this behavior[3]:
> When job control is not in effect, asynchronous commands ignore
> SIGINT and SIGQUIT in addition to these inherited handlers.
Several of our scripts[4] - most prominently ":make" - use the
"</dev/null >/dev/null 2>&1 &" pattern to run potentially long-running
processes in the background, without blocking the editor.
On <c-c>, we send SIGINT to our process group.
As explained above, this will generally not terminate any background processes.
This problem has been masked by a behavior that is unique to using
both Bash and its "eval" builtin. Given
nop %sh{
rm -f /tmp/fifo
mkfifo /tmp/fifo
(
eval make >/tmp/fifo 2>&1 &
) >/dev/null 2>&1 </dev/null
}
edit -fifo /tmp/fifo *my-fifo*
When running this and pressing Control+C, Bash actually terminates
the Make processes. However if I remove the "eval", it no longer does.
This doesn't seems like something we should rely on.
Other commands like ":git blame" don't use "eval" so they cannot be
cancelled today.
Fix these issues by sending SIGTERM instead of SIGINT, which should
apply to the whole process group with pretty much the same effect.
Barely tested, let's see if this breaks some weird build system.
In future we might allow more fine-grained control over which processes
are cancelled by <c-c>.
{{{
Alternative solution:
With the above fix, scripts can opt-out of being terminated by <c-c>
by using setsid (though that's not POSIX unfortunately, and may
require nesting quotes) or the classic Unix double-forking trick to
create a daemon process.
Though it is certainly possible that someone expects commands like
this to survive <c-c>:
nop %sh{ tail -f my-log </dev/null 2>&1 | grep some-error > some-file 2>&1 & }
I think it would be ideal to stick to SIGINT and match semantics of
a noninteractive shell, to avoid muddying the waters.
Background processes could still **opt into** being terminated by
<c-c>. For example by providing a simple program in libexec/ that does
// interruptible.c
int main(int argc, char** argv) {
signal(SIGINT, SIG_DFL);
execv(argv[1], &argv[1]);
}
used as
diff --git a/rc/tools/make.kak b/rc/tools/make.kak
index b88f7e538..f6e041908 100644
--- a/rc/tools/make.kak
+++ b/rc/tools/make.kak
@@ -16,3 +16,3 @@ define-command -params .. \
mkfifo ${output}
- ( eval "${kak_opt_makecmd}" "$@" > ${output} 2>&1 & ) > /dev/null 2>&1 < /dev/null
+ ( eval "interruptible ${kak_opt_makecmd}" "$@" > ${output} 2>&1 & ) > /dev/null 2>&1 < /dev/null
Unfortunately, it's inconvenient to add "interruptible" to commands
like clang-parse and git-blame because they background a whole subshell
with many commands, so we'd need to nest quotes. Also I'm not sure
if this brings any benefit.
So I didn't explore this further yet although we can definitely do that.
}}}
Fixes#3751
[1]: https://stackoverflow.com/questions/45106725/why-do-shells-ignore-sigint-and-sigquit-in-backgrounded-processes/45106961#45106961
[2]: https://unix.stackexchange.com/questions/372541/why-doesnt-sigint-work-on-a-background-process-in-a-script/677742#677742
[3]: https://www.gnu.org/software/bash/manual/html_node/Signals.html
[4]: clang-parse, ctags-*, git blame, git log, gopls references,
grep, jedi-complete, lint-*, make; I don't think any of these
should be uninterruptible.
The tmux-terminal commands typically run
tmux split-window kak -c ${kak_session} </dev/null >/dev/null 2>&1 &
The tmux process runs in the background with output silenced. This is
not necessary because "tmux split-window" is a thin client that
merely forwards its arguments to the tmux server. All our wrappers
for other terminal-servers (kitty, iterm, screen, wezterm, zellij)
simply run in the foreground, not silencing any errors.
The tmux backgrounding was added in 208b91627 (Move client.kak as
x11.kak and change tmux.kak to be its peer, 2015-11-17), probably for
consistency with x11.kak. That one is different however because it
potentially spawns a full terminal, not just a client that briefly
talks to a terminal server - that's why x11-terminal needs to use
"setsid," to avoid killing said terminal when we signal our process
group.
Remove the backgrounding from tmux.kak for consistency and to reduce
surprise.
`grep-next-match` works only on the `*grep*` buffer so it can't be used
on buffers that were preserved by renaming or on other grep-flavored
buffers created by 3rd party plugins kakoune-find and kakoune-lsp,
like `*find*` and `*references*`.
Let's generalize `grep-next-match` with a `jump-next` command that
takes a buffer argument.
This renames some options but I think they're not commonly used.
kakoune-lsp is an exception that uses grep_current_line but it's no big
deal, things will fail loud and early if options are missing.
Since grep.kak and friends now depend on jump.kak, move the jumpclient
declaration there as well.
Rename suffix to tag as it ends up not being the filename suffix,
apply that tag to .o and .d files so that changing the build type
does not wipe/reuse files from another build type.
Make .d file hidden files, this does not seem possible for the .o
files as they are targets and posix support inference rules when only
the suffix changes. This is not a big issue as Kakoune ignores those
files by default.
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public domain. I make this dedication for the benefit of the public at
large and to the detriment of my heirs and successors. I intend this
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present and future rights to this software under copyright law.
