added xlsx2csv to first convert xlsx to csv and then display the csv …

…content

ChangeLog

@@ -1,6 +1,8 @@
 ****************************************************************************
 # ChangeLog for lesspipe.sh						   #
 ****************************************************************************
+- added xlsx2csv to first convert xlsx to csv and then display the csv content
+- added optional minimal version check for external commands
 Version 2.17 Dec 22 2024
 - evaluation of current locale changed (compatible with old bash versions)
 - correct typo in xlsx files handling
@@ -102,7 +104,7 @@ Version 2.00-beta Dec 22 2021
 - added better bsdtar handling from the contributed bsdtar patch (Jim Pryor)
 - added -layout option to pdftotext (Sergio Callegari)
 - changed code for extraction of less calling parameters
-- dont engage lesspipe in pipes (LESSPIPE=|-...), if called from man and perldoc
+- don't engage lesspipe in pipes (LESSPIPE=|-...), if called from man and perldoc
 - iconv handles most conversions from non foreign encodings
 - tarcolor enhanced and renamed to archive_color, archive listings colorizations
 Version 2.00-alpha Dec 8 2021

README.md

@@ -222,7 +222,7 @@ Several Linux distributions do now set **LESSOPEN** by default and if the conten
 - ods			requires `xlscat` or `libreoffice`
 - MS Word (docx)	requires `pandoc` or `docx2txt` or `libreoffice`
 - Powerpoint (pptx)	requires `pptx2md` or `libreoffice`
-- Excel (xlsx)		requires `in2csv` or `xlscat` or `excel2csv` or `libreoffice`
+- Excel (xlsx)		requires `xlsx2csv` (>= 0.8.3) or `in2csv` or `xlscat` or `excel2csv` or `libreoffice`
 - csv			requires `csvtable` or `csvlook` or `column` or `pandoc`
 - rtf			requires `unrtf` or `libreoffice`
 - epub			requires `pandoc`
@@ -455,6 +455,7 @@ STDOUT and the commands executed to STDERR.
 - unrtf                https://www.gnu.org/software/unrtf/ (2018)
 - wvText               https://github.com/AbiWord/wv/ (2014)
 - xlscat               https://metacpan.org/pod/Spreadsheet::Read (2024)
+- xlsx2csv (>=0.8.3)   https://github.com/dilshod/xlsx2csv (2024) 
 - sxw2txt              https://vinc17.net/software/sxw2txt (2010)
 - dtc                  https://git.kernel.org/cgit/utils/dtc/dtc.git (2024)
 - xmq                  https://github.com/libxmq/xmq/releases/latest (2024)

lesspipe.sh

@@ -4,6 +4,7 @@ lesspipe_version=2.17
 # Author: Wolfgang Friebel (wp.friebel AT gmail.com)
 
 has_cmd () {
+	[[ -n "$2" && "$2" > $($1 --version 2>/dev/null) ]] && return 1
 	command -v "$1" > /dev/null
 }
 
@@ -297,7 +298,9 @@ get_unpack_cmd () {
 			has_cmd zstd && cmd=(zstd -cdqM1073741824 "$2") ;;
 		lz4)
 			has_cmd lz4 && cmd=(lz4 -cdq "$2") ;;
+		# xls(x) output looks better if transformed to csv and then displayed
 		xlsx)
+			{ has_cmd xlsx2csv 0.8.3 && cmd=(xlsx2csv "$2"); } ||
 			{ has_cmd in2csv && cmd=(in2csv -f xlsx "$2"); } ||
 			{ has_cmd excel2csv && cmd=(istemp excel2csv "$2"); } ;;
 		ms-excel)