#!/usr/bin/env bash

# @(#) s1	Demonstrate colorize diff output.
# ANSIfilter:
# André Simon - Startseite

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C diff colordiff ansifilter

pl " Input data files data?:"
head data?

pl " Results:"
diff -y --suppress-common-lines data? |
colordiff |
ansifilter -B   # -B bbcode; -H html; -L latex, etc.

exit 0

$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian 5.0.8 (lenny, workstation) 
bash GNU bash 3.2.39
diff (GNU diffutils) 2.8.1
colordiff diff (GNU diffutils) 2.8.1
ansifilter - ( local: ~/executable/ansifilter, 2014-01-28 )

-----
 Input data files data?:
==> data1 <==
ABCD*DEFG~ 
HI*JK~
LMN*OP~

==> data2 <==
ABCD*DEFG~
HIH*JK~
LMN*OP~
FGH*NM~

-----
 Results:
ABCD*DEFG~                            | ABCDE*DEFG~
HI*JK~                                | HIH*JK~
                                      > FGH*NM~