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runtime(sh): consider sh as POSIX shell by default

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Also, do not set g:is_kornshell when g:is_posix is set. BSD shells are
POSIX but many are derived from the ash shell.

closes: #16939

Signed-off-by: Mohamed Akram <mohd.akram@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Mohamed Akram 2025-03-21 17:52:08 +01:00 committed by Christian Brabandt
parent 5753084042
commit 51a06ecee0
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2 changed files with 49 additions and 49 deletions
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14
runtime/doc/syntax.txt
View File

@ -1,4 +1,4 @@
*syntax.txt* For Vim version 9.1. Last change: 2025 Mar 15
*syntax.txt* For Vim version 9.1. Last change: 2025 Mar 21
VIM REFERENCE MANUAL by Bram Moolenaar
@ -3512,25 +3512,25 @@ cases pertain, then the first line of the file is examined (ex. looking for
/bin/sh /bin/ksh /bin/bash). If the first line specifies a shelltype, then
that shelltype is used. However some files (ex. .profile) are known to be
shell files but the type is not apparent. Furthermore, on many systems sh is
symbolically linked to "bash" (Linux, Windows+cygwin) or "ksh" (Posix).
symbolically linked to "bash" (Linux, Windows+cygwin) or "ksh" (POSIX).
One may specify a global default by instantiating one of the following
variables in your <.vimrc>:
ksh: >
let g:is_kornshell = 1
< posix: (using this is nearly the same as setting g:is_kornshell to 1) >
< posix: (default) >
let g:is_posix = 1
< bash: >
let g:is_bash = 1
< sh: (default) Bourne shell >
< dash: >
let g:is_dash = 1
< sh: Bourne shell >
let g:is_sh = 1
< (dash users should use posix)
If there's no "#! ..." line, and the user hasn't availed himself/herself of a
default sh.vim syntax setting as just shown, then syntax/sh.vim will assume
the Bourne shell syntax. No need to quote RFCs or market penetration
the POSIX shell syntax. No need to quote RFCs or market penetration
statistics in error reports, please -- just select the default version of the
sh your system uses and install the associated "let..." in your <.vimrc>.

62
runtime/syntax/sh.vim
View File

@ -7,6 +7,7 @@
" 2024 Nov 03 by Aliaksei Budavei <0x000c70 AT gmail DOT com> (improved bracket expressions, #15941)
" 2025 Jan 06 add $PS0 to bashSpecialVariables (#16394)
" 2025 Jan 18 add bash coproc, remove duplicate syn keywords (#16467)
" 2025 Mar 21 update shell capability detection (#16939)
" Version: 208
" Former URL: http://www.drchip.org/astronaut/vim/index.html#SYNTAX_SH
" For options and settings, please use: :help ft-sh-syntax
@ -17,6 +18,9 @@ if exists("b:current_syntax")
finish
endif
" Ensure this is set unless we find another shell
let b:is_sh = 1
" If the shell script itself specifies which shell to use, use it
if getline(1) =~ '\<ksh\>'
let b:is_kornshell = 1
@ -24,7 +28,25 @@ elseif getline(1) =~ '\<bash\>'
let b:is_bash = 1
elseif getline(1) =~ '\<dash\>'
let b:is_dash = 1
elseif !exists("g:is_kornshell") && !exists("g:is_bash") && !exists("g:is_posix") && !exists("g:is_sh") && !exists("g:is_dash")
" handling /bin/sh with is_kornshell/is_sh {{{1
" b:is_sh will be set when "#! /bin/sh" is found;
" However, it often is just a masquerade by bash (typically Linux)
" or kornshell (typically workstations with Posix "sh").
" So, when the user sets "g:is_kornshell", "g:is_bash",
" "g:is_posix" or "g:is_dash", a b:is_sh is converted into
" b:is_kornshell/b:is_bash/b:is_posix/b:is_dash, respectively.
elseif !exists("b:is_kornshell") && !exists("b:is_bash") && !exists("b:is_posix") && !exists("b:is_dash")
if exists("g:is_kornshell")
let b:is_kornshell= 1
elseif exists("g:is_bash")
let b:is_bash= 1
elseif exists("g:is_dash")
let b:is_dash= 1
elseif exists("g:is_posix")
let b:is_posix= 1
elseif exists("g:is_sh")
let b:is_sh= 1
else
" user did not specify which shell to use, and
" the script itself does not specify which shell to use. FYI: /bin/sh is ambiguous.
" Assuming /bin/sh is executable, and if its a link, find out what it links to.
@ -40,39 +62,11 @@ elseif !exists("g:is_kornshell") && !exists("g:is_bash") && !exists("g:is_posix"
let b:is_bash = 1
elseif s:shell =~ '\<dash\>'
let b:is_dash = 1
else
let b:is_posix = 1
endif
unlet s:shell
endif
" handling /bin/sh with is_kornshell/is_sh {{{1
" b:is_sh will be set when "#! /bin/sh" is found;
" However, it often is just a masquerade by bash (typically Linux)
" or kornshell (typically workstations with Posix "sh").
" So, when the user sets "g:is_bash", "g:is_kornshell",
" or "g:is_posix", a b:is_sh is converted into b:is_bash/b:is_kornshell,
" respectively.
if !exists("b:is_kornshell") && !exists("b:is_bash") && !exists("b:is_dash")
if exists("g:is_posix") && !exists("g:is_kornshell")
let g:is_kornshell= g:is_posix
endif
if exists("g:is_kornshell")
let b:is_kornshell= 1
if exists("b:is_sh")
unlet b:is_sh
endif
elseif exists("g:is_bash")
let b:is_bash= 1
if exists("b:is_sh")
unlet b:is_sh
endif
elseif exists("g:is_dash")
let b:is_dash= 1
if exists("b:is_sh")
unlet b:is_sh
endif
else
let b:is_sh= 1
endif
endif
" if b:is_dash, set b:is_posix too
@ -80,6 +74,12 @@ if exists("b:is_dash")
let b:is_posix= 1
endif
if exists("b:is_kornshell") || exists("b:is_bash")
if exists("b:is_sh")
unlet b:is_sh
endif
endif
" set up default g:sh_fold_enabled {{{1
" ================================
if !exists("g:sh_fold_enabled")