From 74b2e5ef0ae9de6ec28e5aa71d3d20b83b131404 Mon Sep 17 00:00:00 2001
From: Connor Olding <cloningdonor@gmail.com>
Date: Mon, 22 Jul 2024 04:47:31 -0700
Subject: [PATCH] implement new shell compatibility markers

---
 sh/recombine | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/sh/recombine b/sh/recombine
index 594dd40..5c190a6 100644
--- a/sh/recombine
+++ b/sh/recombine
@@ -4,18 +4,18 @@
 cd ~/sh && unset IFS || exit
 [ -z "${0##/*}" ] && sh=zsh || sh="${0#-}" # zsh replaces $0, so hardcode it
 case "$sh" in
-(ash) SH=ASH;;
-(bash) SH=BASH;;
-(dash) SH=DASH;;
-(hush) SH=HUSH;;
-(ksh) SH=KSH;;
-(loksh) SH=OKSH;; # similar enough to oksh to use the same compatibility flag
-(mksh) SH=MKSH;;
-(oksh) SH=OKSH;;
-(osh) SH=OSH;;
-(posh) SH=POSH;;
-(yash) SH=YASH;;
-(zsh) SH=ZSH; set -o SH_WORD_SPLIT;;
+(ash)   SH=ASH  c=ash;;
+(bash)  SH=BASH c=bash;;
+(dash)  SH=DASH c=dash;;
+(hush)  SH=HUSH c=hush;;
+(ksh)   SH=KSH  c=ksh;;
+(loksh) SH=OKSH c=oksh;; # similar enough to oksh to use the same compatibility flag
+(mksh)  SH=MKSH c=mksh;;
+(oksh)  SH=OKSH c=oksh;;
+(osh)   SH=OSH  c=osh;;
+(posh)  SH=POSH c=posh;;
+(yash)  SH=YASH c=yash;;
+(zsh)   SH=ZSH  c=zsh; set -o SH_WORD_SPLIT;;
 (*)
     printf >&2 %s\\n "unknown shell (\$0): $0"
     exit 1
@@ -26,8 +26,10 @@ for f in "${HOME:?}/sh"/*; do
     [ -n "${f##*.*}" ] && [ -f "$f" ] || continue
     i=10 sh=
     while IFS= read -r line; do
+        check=0
         for word in $line; do
-            case "$word" in (YES_$SH) sh=1;; (NO_$SH) sh=0;; esac
+            case "$word" in (YES_$SH) sh=1;; (NO_$SH) sh=0;; (compat:) check=1;; esac
+            [ "$check" != 1 ] || case "$word" in (+$c) sh=1;; (-$c) sh=0;; esac
         done
         [ "$((i-=1))" != 0 ] || break # act like head -n10
     done < "$f"