[9fans] diff side-by-side, an rc challange

[9fans] diff side-by-side, an rc challange

[Steve Simon]

Hi,

I am having to dig through some data files comparing similar results,
I really need a side-by-side compare.

I believe adiff does this for acme, but I am not an acme-ista so I thought
"How hand can it be?".

I wrote the script below, but then I thought "I should be able to do this
without temporary files"

This is where my knowledge of rc(1) fails. How to create two pipes, hold
them open, and use them to shuffle bytes.

anyone care to take up the challange?

-Steve

--------------------------------

#!/bin/rc

tmp1=/tmp/diffsbs-1.$pid
tmp2=/tmp/diffsbs-2.$pid

fn sigint { rm -f $tmp1 $tmp2 }
fn sighup { rm -f $tmp1 $tmp2 }

if(! ~ $#* 2){
	echo usage: $0 file1 file2
	exit 'usage'
}

diff -b -a $1 $2 | awk -v 'out1='^$tmp1 -v 'out2='^$tmp2 '
	{
		key = substr($0, 1, 1);
		txt = substr($0, 2, length($0)-2);
		if(key == " "){
			printf("%-32.32s\n", txt)		> out1
			printf("%-32.32s\n", txt)		> out2
		}
		if(key == "-"){
			printf("%-32.32s\n", txt)		> out1
			printf("%-32.32s\n", "")		> out2
		}
		if(key == "+"){
			printf("%-32.32s\n", "")		> out1
			printf("%-32.32s\n", txt)		> out2
		}
	}'

pr -m -o0 -t -w100 -l0 $tmp1 $tmp2

Re: [9fans] diff side-by-side, an rc challange

[Kurt H Maier]

On Thu, Mar 09, 2017 at 03:56:34PM +0000, Steve Simon wrote:
> Hi,
>
> I am having to dig through some data files comparing similar results,
> I really need a side-by-side compare.

Does comm(1) not work for this case?

khm

Re: [9fans] diff side-by-side, an rc challange

[Steve Simon]

Good grief,

I never do stop learning

I knew the name but I had never really understood what comm does.

Perfect.

Thanks Kurt.

-Steve