From 3af41a23c4c0ac6f5fd116eb90591d9bea498158 Mon Sep 17 00:00:00 2001
From: Lasse Collin <lasse.collin@tukaani.org>
Date: Fri, 9 Feb 2024 23:00:05 +0200
Subject: [PATCH] xzless: Use --show-preproc-errors with "less" 632 and newer.

This makes "less" show a warning if a decompression error occurred.

(cherry picked from commit fd0692b0525e6c26b496492be9e2c865cab734f8)
(cherry picked from commit 5e7a8c0869d9b4c32c34d70b48b0935721aa37fd)
---
 src/scripts/xzless.in | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/scripts/xzless.in b/src/scripts/xzless.in
index 79a849e2..93a415d7 100644
--- a/src/scripts/xzless.in
+++ b/src/scripts/xzless.in
@@ -47,13 +47,20 @@ if test "${LESSMETACHARS+set}" != set; then
 	LESSMETACHARS="$space$tab$nl'"';*?"()<>[|&^`#\$%=~'
 fi
 
-if test "$(less -V | { read _ ver _ && echo ${ver%%.*}; })" -ge 429; then
+VER=$(less -V | { read _ ver _ && echo ${ver%%.*}; })
+if test "$VER" -ge 429; then
 	# less 429 or later: LESSOPEN pipe will be used on
 	# standard input if $LESSOPEN begins with |-.
 	LESSOPEN="|-$xz -cdfqQ -- %s"
 else
 	LESSOPEN="|$xz -cdfqQ -- %s"
 fi
+
+SHOW_PREPROC_ERRORS=
+if test "$VER" -ge 632; then
+	SHOW_PREPROC_ERRORS=--show-preproc-errors
+fi
+
 export LESSMETACHARS LESSOPEN
 
-exec less "$@"
+exec less $SHOW_PREPROC_ERRORS "$@"