How to highlight output from diff command and make them side by side?

Question

I have two files

$ cat file1.txt
UUXX:1
UUXX:2

$ cat file2.txt
UUXX:3
UUXX:1

I want to use this command

$ diff --old-group-format=$'\e[0;31m%<\e[0m' --new-group-format=$'\e[0;31m%>\e[0m' --unchanged-group-format=$'\e[0;32m%=\e[0m' file1.txt file2.txt

I got this output with UUXX:3 and UUXX:2 in red and UUXX:1 in green

UUXX:3
UUXX:1
UUXX:2

But I want to make them side by side like this, and keep the UUXX:3 and UUXX:2 in red and both UUXX:1 in green.

UUXX:1                             UUXX:3
UUXX:2                             UUXX:1

have you tried -y, diff -y file1.txt file2.txt | colordiff — Siva
– Siva, Commented Jun 1, 2018 at 12:59

agc · Accepted Answer · 2019-05-10 22:48:20Z

1

This isn't exactly the thing required, but it's similar:

diff  --color=always -y file1 file2

Outputs in red, green, and white:

                                  > UUXX:3
UUXX:1                              UUXX:1
UUXX:2                            <

answered May 10, 2019 at 22:27

agc

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