shithub: plan9front

ref: 2af46e406bbd443ae10025777247798a685afc3c

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#!/bin/rc

if(~ $#* 0 1){
	echo >[1=2] usage: adiff file1 file2
	echo >[1=2] or adiff file1 file2... dir
	exit usage
}

dir = /mnt/wsys
if(! test -f $dir/cons)
	dir = /mnt/term/$dir
id=`{cat $dir/new/ctl}
id=$id(1)

l=$1
r=$2
if (test -d $1) l=$1/`{basename $2}
if not if (test -d $2) r=$2/`{basename $1}

echo 'name '^`{pwd}^/-diff-^`{basename $l} > $dir/$id/ctl

diff $* | awk -v 'l='$l -v 'r='^$r '/^diff/ {l=$2; r=$3; next} /^[1-9]/ {sub("[acd]", " & " r ":"); sub("^", l ":", $0)}
	{print $0}' > $dir/$id/body
echo clean > $dir/$id/ctl