Commit: runtime(helptoc): reload cached g:helptoc.shell_prompt when starting toc

[Christian Brabandt]

runtime(helptoc): reload cached g:helptoc.shell_prompt when starting toc

Commit: https://github.com/vim/vim/commit/c74a87eea2cffe911dc5741ca29199165bea631e
Author: D. Ben Knoble <ben.knob...@gmail.com>
Date: Sun Dec 1 16:06:18 2024 +0100

runtime(helptoc): reload cached g:helptoc.shell_prompt when starting toc

Follow up on PR 10446 [1] so that changes at run-time (or after loading
a vimrc) are reflected at next use. Instead of "uncaching" the variable
by computing SHELL_PROMPT on each use, which could negatively impact
performance, reload any user settings before creating the TOC.

Also make sure, changes to the shell prompt variable do correctly
invalidate b:toc, so that the table of content is correctly re-created
after user makes any changes.

[1]: https://github.com/vim/vim/pull/10446#issuecomment-2485169333

closes: #16097

Signed-off-by: D. Ben Knoble <ben.knob...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/pack/dist/opt/helptoc/autoload/helptoc.vim b/runtime/pack/dist/opt/helptoc/autoload/helptoc.vim
index 087da798e..c0d86a4e6 100644
--- a/runtime/pack/dist/opt/helptoc/autoload/helptoc.vim
+++ b/runtime/pack/dist/opt/helptoc/autoload/helptoc.vim
@@ -2,9 +2,20 @@ vim9script noclear

# Config {{{1

-const SHELL_PROMPT: string = g:
- ->get('helptoc', {})
- ->get('shell_prompt', '^\w\+@\w\+:\+\$\s')
+var SHELL_PROMPT: string = ''
+
+def UpdateUserSettings() #{{{2
+ var new_prompt: string = g:
+ ->get('helptoc', {})
+ ->get('shell_prompt', '^\w\+@\w\+:\+\$\s')
+ if new_prompt != SHELL_PROMPT
+ SHELL_PROMPT = new_prompt
+ # invalidate cache: user config has changed
+ unlet! b:toc
+ endif
+enddef
+
+UpdateUserSettings()

# Init {{{1

@@ -141,6 +152,8 @@ export def Open() #{{{2
return
endif

+ UpdateUserSettings()
+
# invalidate the cache if the buffer's contents has changed
if exists('b:toc') && &filetype != 'man'
if b:toc.changedtick != b:changedtick