Re: [PATCH] Increase $COLUMNS when generating long option completions

[Marlon Richert <marlon.richert@gmail.com>]

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On Fri, Aug 6, 2021 at 2:44 AM Bart Schaefer <schaefer@brasslantern.com> wrote:
>
> On Thu, Aug 5, 2021 at 11:12 AM Marlon Richert <marlon.richert@gmail.com> wrote:
> >
> > I don't know if it makes sense to always set
> > COLUMNS in _call_program, because it is not always called to produce
> > visual output. On the other hand, if you think it won't hurt, then
> > yes, that might be a better option.
>
> I can't think of a case where it would be an issue ... if the program
> isn't producing output meant for the terminal, it shouldn't be
> bothered by either the presence or absence of $COLUMNS.  I'm now
> pondering whether your original method does either a better or a worse
> (or neither) job if the called program uses a remote shell or the
> like.
>
> > I made it 999, rather than $COLUMNS, because the output is cached and
> > terminal emulators can be resized.
>
> Hrm.  That sounds like a problem with the cache validation rules, but
> I suppose setting a large value of COLUMNS is a reasonable safeguard.

How does this patch look to you?

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From 1912a575fbdf34e4937eeea9387807351342fc37 Mon Sep 17 00:00:00 2001
From: Marlon Richert <marlonrichert@users.noreply.github.com>
Date: Sat, 7 Aug 2021 22:52:21 +0300
Subject: [PATCH] Set $COLUMNS in _call_program to ensure cached command output
 is sufficiently wide

---
 Completion/Base/Utility/_call_program | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/Completion/Base/Utility/_call_program b/Completion/Base/Utility/_call_program
index 73f3ef6d2..cc7c9adf9 100644
--- a/Completion/Base/Utility/_call_program
+++ b/Completion/Base/Utility/_call_program
@@ -1,6 +1,7 @@
 #autoload +X
 
-local curcontext="${curcontext}" tmp err_fd=-1 clocale='_comp_locale;'
+local cmd clocale='_comp_locale;' cols='COLUMNS=999' curcontext="${curcontext}"
+local -i err_fd=-1
 local -a prefix
 
 if [[ "$1" = -p ]]; then
@@ -22,14 +23,14 @@ fi
 
 {	# Begin "always" block
 
-if zstyle -s ":completion:${curcontext}:${1}" command tmp; then
-  if [[ "$tmp" = -* ]]; then
-    eval $clocale "$tmp[2,-1]" "$argv[2,-1]"
+if zstyle -s ":completion:${curcontext}:${1}" command cmd; then
+  if [[ "$cmd" = -* ]]; then
+    eval $clocale $cols "$cmd[2,-1]" "$argv[2,-1]"
   else
-    eval $clocale $prefix "$tmp"
+    eval $clocale $cols $prefix "$cmd"
   fi
 else
-  eval $clocale $prefix "$argv[2,-1]"
+  eval $clocale $cols $prefix "$argv[2,-1]"
 fi 2>&$err_fd
 
 } always {
-- 
2.30.1 (Apple Git-130)