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up vote 1 down vote favorite

I have this output as a result of comparing files with diff:

< IF-Name :STRING: "lns-wall-01-t2"       Index:Gge32: 260
---
> IF-Name :STRING: "lns-wall-01-t2"       Index:Gge32: 25

I need this output:

lns-wall-01-t2 old:260 new:25

I want to use sed.

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3 Answers 3

up vote 5 down vote

With awk:

awk '
/^</ { old = $NF }
/^>/ { str = $4 ; gsub(/"/,"",str) ; printf "%s old:%s new:%s\n", str, old, $NF }
' your_files_list_here
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Thankyou for your response .I am trying to put this in script it gives error : Rep_Scripts='/home/scripts' for i in `cat $Rep_Scripts/diff.txt | awk ' /^</ { old = $NF } /^>/ { str = $4 ; gsub(/"/,"",str) ; printf "%s old:%s new:%s\n", str, old, $NF } ' done –  toto Apr 28 at 14:40
    
In your command line there are missing a few ; between the commands (assuming it's a on-liner as presented here), and a loop over a single file is unnecessary anyway. Moreover, awk can accept a list of files as arguments. - Instead of using a loop try this call: awk ' ... ' "$Rep_Scripts"/diff.txt, where the file argument is directly read by awk. In case you will have more than one file to process extend the argument list or use wildcards, as in: awk ' ... ' "$Rep_Scripts"/*.txt. –  Janis Apr 28 at 15:03
    
If you have issues with your code, please post the error message. –  Janis Apr 28 at 15:07
    
I try it..the script is not able to be executed and and no error on compiling so what could be the problem –  toto Apr 28 at 15:28
    
In case it's not clear, I've explicitly appended in my answer where the files list is to be placed. - Beyond that; what do you mean by "the script is not able to be executed"? - You certainly need not "compile" the awk command, as you wrote, just call it. –  Janis Apr 28 at 15:33
up vote 2 down vote 
sed '
    /^</{
        # first line formatting
        s/^.*"\(.*\)".*: /\1 old:/
        # append next 2 lines
        N
        N
        # exchange from 2nd line begining till last ":" by "new"
        s/\n---.*: / new:/
        }' "$Rep_Scripts"/diff.txt
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thankyou it's working –  toto Apr 28 at 15:43
up vote 1 down vote

use a different type of diff output:

diff -y --suppress-common-lines f1 f2

which gives you a more userfriendly format:

F-Name :STRING: "lns-wall-01-t2"       Index:Gge32: 260   |IF-Name :STRING: "lns-wall-01-t2"       Index:Gge32: 25

and

diff -y ........ |
perl -nE '/"(.*?)".*?32:\s*(\d+).*32:\s*(\d+)/ 
          and say "$1 old:$2 new:$3"'
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