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man.vim: Simplify man#init to reduce load time (#12482)

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I removed the SunOS stuff since no one uses SunOS and I've never tested
it on there.

I removed the section_flag init as we can just use -S instead of -s
and -S is used by every implementation as far as I know.

This brings man#init's time from 50-70ms to 15-20ms for me.

Closes #12318
Related #6766
Related #6815
This commit is contained in:
Anmol Sethi
2020-07-21 11:46:42 -04:00
committed by GitHub
parent 459800db43
commit a6917f840d
1 changed files with 4 additions and 16 deletions
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20
runtime/autoload/man.vim
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@@ -7,22 +7,10 @@ let s:loaded_man = 1
let s:find_arg = '-w' let s:find_arg = '-w'
let s:localfile_arg = v:true " Always use -l if possible. #6683 let s:localfile_arg = v:true " Always use -l if possible. #6683
let s:section_arg = '-s' let s:section_arg = '-S'
function! s:init_section_flag() function! man#init() abort
call system(['env', 'MANPAGER=cat', 'man', s:section_arg, '1', 'man'])
if v:shell_error
let s:section_arg = '-S'
endif
endfunction
function! s:init() abort
call s:init_section_flag()
" TODO(nhooyr): Does `man -l` on SunOS list searched directories?
try try
if !has('win32') && $OSTYPE !~? 'cygwin\|linux' && system('uname -s') =~? 'SunOS' && system('uname -r') =~# '^5'
let s:find_arg = '-l'
endif
" Check for -l support. " Check for -l support.
call s:get_page(s:get_path('', 'man')) call s:get_page(s:get_path('', 'man'))
catch /E145:/ catch /E145:/
@@ -141,7 +129,7 @@ function! s:get_page(path) abort
" Disable hard-wrap by using a big $MANWIDTH (max 1000 on some systems #9065). " Disable hard-wrap by using a big $MANWIDTH (max 1000 on some systems #9065).
" Soft-wrap: ftplugin/man.vim sets wrap/breakindent/…. " Soft-wrap: ftplugin/man.vim sets wrap/breakindent/….
" Hard-wrap: driven by `man`. " Hard-wrap: driven by `man`.
let manwidth = !get(g:,'man_hardwrap', 1) ? 999 : (empty($MANWIDTH) ? winwidth(0) : $MANWIDTH) let manwidth = !get(g:, 'man_hardwrap', 1) ? 999 : (empty($MANWIDTH) ? winwidth(0) : $MANWIDTH)
" Force MANPAGER=cat to ensure Vim is not recursively invoked (by man-db). " Force MANPAGER=cat to ensure Vim is not recursively invoked (by man-db).
" http://comments.gmane.org/gmane.editors.vim.devel/29085 " http://comments.gmane.org/gmane.editors.vim.devel/29085
" Set MAN_KEEP_FORMATTING so Debian man doesn't discard backspaces. " Set MAN_KEEP_FORMATTING so Debian man doesn't discard backspaces.
@@ -466,4 +454,4 @@ function! man#goto_tag(pattern, flags, info) abort
\ }) \ })
endfunction endfunction
call s:init() call man#init()