<html>
<body>
<pre>
<tt>
#!/bin/sh
#
# Diff standard input against $1 and produce a context style
# diff which can be edited by hand to include modifications.
#
# Lines with:
#
# + are new
# - reqire deletion
# | should be replaced
# ? should be substituted
#
case $# in
1)
;;
*)
echo "usage: `basename $0` new-file" 1>&2
exit 1
;;
esac
trap 'rm /tmp/vidi.*$$' 0
sed '/^[-+|?.]/s/^/./' > /tmp/vidi.$$
diff -e /tmp/vidi.$$ "$1" | awk '
cmd == "" {
printf("%s", substr($1, 1, length($1) - 1))
cmd = substr($1, length($1), 1)
if (cmd == "d")
{
print "s/^/-/"
cmd = ""
next
}
if (cmd == "c")
{
print "s/^/?/"
char = "|"
}
else
char = "+"
print "a"
next
}
$0 == "." {
cmd = ""
print $0
next
}
{
print char $0
}
END {
print "1,$p"
}
' > /tmp/vidi.e$$
ed - /tmp/vidi.$$ < /tmp/vidi.e$$
</tt>
</pre>
<HR>
© 1998,
Boyd Roberts:
<A HREF="mailto:boyd@fr.inter.net">boyd@fr.inter.net</A>
</body>
</html>
|
