add output colorization support using regexes

cmd/root.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2022-2025 Thomas von Dein
+Copyright © 2022-2026 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -95,6 +95,7 @@ func Execute() {
 			conf.PrepareCustomHeaders(headers)
 
 			wrapE(conf.PrepareFilters())
+			wrapE(conf.PrepareColorizers())
 
 			conf.DetermineColormode()
 			conf.ApplyDefaults()
@@ -191,6 +192,8 @@ func Execute() {
 		"filter", "F", nil, "Filter by field (field=regexp || field!=regexp)")
 	rootCmd.PersistentFlags().StringArrayVarP(&conf.Transposers,
 		"regex-transposer", "R", nil, "apply /search/replace/ regexp to fields given in -T")
+	rootCmd.PersistentFlags().StringArrayVarP(&conf.Colorizers,
+		"regex-colorizer", "K", nil, "apply /search/color[:background]/ to the whole output")
 
 	// input
 	rootCmd.PersistentFlags().StringVarP(&conf.InputFile, "read-file", "r", "",

cmd/shortusage.go

@@ -13,6 +13,7 @@ const shortusage = `tablizer [regex,...] [-r file] [flags]
 -x col,...   use custom headers                      -d  debug
 -o char      use char as output separator            -g  auto generate headers
 
+-K /pattern/foreground[:background]/ colorize pattern of output
 -O org  -C CSV  -M md  -X ext  -S shell  -Y yaml  -J json  -P template
 -a sort by age   -i sort numerically   -t sort by time   -D sort descending order
 -m show manual   -v  show version      --help  show detailed help`