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runtime(sh,zsh): clear $MANPAGER in ftplugin before shelling out

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Say you use Vim and set MANPAGER='vim -M +MANPAGER --not-a-term -'; then
:{Zs,S}hKeywordPrg (or K) will crap out and spew terminal garbage into
less when bash's "help" fails. This was introduced by 2f25e40b1
(runtime: configure keywordpg for some file types (#5566), 2023-08-23)
and may be present in other files touched by that commit.

Make the "man" invocation sensible by unsetting MANPAGER in the
environment.

Note that changing MANPAGER for `:terminal` is not needed; Vim within
Vim is perfectly fine.

closes: #14679

Signed-off-by: D. Ben Knoble <ben.knoble+github@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
D. Ben Knoble
2024-05-06 19:52:53 +02:00
committed by Christian Brabandt
parent 53753f6a49
commit 8d8cb45756
2 changed files with 5 additions and 5 deletions
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4
runtime/ftplugin/zsh.vim
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@ -2,7 +2,7 @@
" Language: Zsh shell script
" Maintainer: Christian Brabandt <cb@256bit.org>
" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
" Latest Revision: 2023-10-07
" Latest Revision: 2024 May 06 by Vim Project (MANPAGER=)
" License: Vim (see :h license)
" Repository: https://github.com/chrisbra/vim-zsh
@ -24,7 +24,7 @@ if executable('zsh') && &shell !~# '/\%(nologin\|false\)$'
elseif has('terminal')
command! -buffer -nargs=1 ZshKeywordPrg silent exe ':term zsh -c "autoload -Uz run-help; run-help <args>"'
else
command! -buffer -nargs=1 ZshKeywordPrg echo system('zsh -c "autoload -Uz run-help; run-help <args> 2>/dev/null"')
command! -buffer -nargs=1 ZshKeywordPrg echo system('MANPAGER= zsh -c "autoload -Uz run-help; run-help <args> 2>/dev/null"')
endif
if !exists('current_compiler')
compiler zsh