#!/bin/sh
#
# htmlwdiff
# Requires: wdiff from ftp://ftp.gnu.org/gnu/wdiff/
# mktemp (in the FreeBSD base system so I don't know where to
# get it if you don't have it)
# $Id: htmlwdiff,v 1.3 2005/10/11 19:13:36 fenner Exp fenner $
#
#
# Henrik's functions
# ----------------------------------------------------------------------
# Utility to find an executable
# ----------------------------------------------------------------------
lookfor() {
default="$1"; shift
for b in "$@"; do
found=$(type -p "$b" 2>/dev/null)
if [ -n "$found" ]; then
if [ -x "$found" ]; then
echo "$found"
return
fi
fi
done
echo "$default"
}
AWK=$(lookfor gawk gawk nawk awk)
# ----------------------------------------------------------------------
# Strip headers and footers, end-of-line whitespace and \r (CR)
# ----------------------------------------------------------------------
strip() {
$AWK '
{ gsub(/\r/, ""); }
{ gsub(/[ \t]+$/, ""); }
/\[?[Pp]age [0-9ivx]+\]?[ \t]*$/{
next;
}
/^[ \t]*\f/ { newpage=1; next; }
/^ *Internet.Draft.+[0-9]+ *$/ { newpage=1; next; }
/^ *INTERNET.DRAFT.+[0-9]+ *$/ { newpage=1; next; }
/^RFC.+[0-9]+$/ { newpage=1; next; }
/^draft-[-a-z0-9_.]+.*[0-9][0-9][0-9][0-9]$/ { newpage=1; next; }
/^[^ \t]/ { sentence=1; }
/[^ \t]/ {
if (newpage) {
if (sentence) {
outline++; print "";
}
} else {
if (haveblank) {
outline++; print "";
}
}
haveblank=0;
sentence=0;
newpage=0;
}
/[.:][ \t]*$/ { sentence=1; }
/^[ \t]*$/ { haveblank=1; next; }
{ outline++; print; }
' $1
}
# ----------------------------------------------------------------------
# Bill's code starts here
# ----------------------------------------------------------------------
a1=`mktemp -t htmlwdiff1.XXXXXX`
a2=`mktemp -t htmlwdiff2.XXXXXX`
strip $1 | sed -e 's/&/&/g' -e 's//\>/g' > $a1
strip $2 | sed -e 's/&/&/g' -e 's//\>/g' > $a2
# This was originally meant to create a portion of a page that
# should be wrapped; however, it seems more common to just use it
# to create a page, so create html wrapper. With luck, you can remove
# the wrapper with "grep -v 'html>'".
echo "wdiff $1 $2"
echo ""
wdiff -w "" -x "" -y "" -z "" $a1 $a2
echo "
"
echo ""
rm -f $a1
rm -f $a2