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#!/usr/local/bin/perl
#######################################################################
# $Author: lindner $
# $Revision: 1.3 $
# $Date: 1995/02/06 22:27:56 $
# $Source: /home/arcwelder/GopherSrc/CVS/gopher+/gopherd/scripts/autoabstract,v $
# $State: Exp $
#
# Paul Lindner, University of Minnesota.
#
# Copyright 1994 by the Regents of the University of Minnesota
# see the file "Copyright" in the distribution for conditions of use.
#######################################################################
# MODULE: autoabstract
#
# A script to automatically generate a gopher+ ABSTRACT for an item
# It can be set up to build .abstract files too..
#
#######################################################################
# Revision History:
# $Log: autoabstract,v $
# Revision 1.3 1995/02/06 22:27:56 lindner
# Use dynamic space for Data_Dir, remove RunLS
#
# Revision 1.2 1994/12/15 17:34:25 lindner
# Fix for .txt files
#
# Revision 1.1 1994/12/14 19:14:28 lindner
# New scripts for Automatic Gopher Blocks
#
#
#######################################################################
#######################################################################
# Parameters you might want to set..
#
# %txtconvert specifies programs that take non-text output and
# output a text version.
#
# $cacheit specifies that this script should automatically generate
# .abstract files for us. eats disk space like a pig
#######################################################################
#
$txtconvert{'.ps'} = "ps2ascii \"%s\"";
$txtconvert{'.html'} = "lynx -dump \"%s\"";
$txtconvert{'.tar.Z'} = "zcat \"%s\" | tar tvf -";
$txtconvert{'.zip'} = "unzip -l \"%s\"";
$txtconvert{'.tex'} = "detex %s";
$cacheit = 0;
#
#######################################################################
$filenamebase = shift || die "Need a filename...";
$fname = $filenamebase;
$ENV{'PATH'} = $ENV{'PATH'} . ':/usr/local/bin:/usr/gnu/bin';
#
# First, find out what filenames there are..
#
exit if (-f "$fname.abstract");
exit if (-d "$fname");
$fname = &FindFiletoAbstract($fname);
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, $atime,
$mtime,$ctime,$blksize,$blocks) = stat($fname);
exit if ($size < 512);
exit if ($fname =~ /gif$/i);
open(f, "<$fname");
foreach $e (keys(%txtconvert)) {
if ($fname =~ /$e$/i) {
$cmd = sprintf($txtconvert{"$e"}, $fname);
close(f);
open(f, "$cmd |");
done;
}
}
#
# Slurp file a paragraph at a time..
#
$/ = "";
#
# Read the first paragraph, lots of interesting stuff here..
#
$_ = <f>;
while (! (/^[\s]*/)) {
$_ = <f>;
}
$firstpara = $_;
if (/^From [\S]+[\s]+\S\S\S[\s]+\S\S\S[\s]+[\d]+ [\d]+:[\d]+:[\d]+ \d\d\d\d/ ||
/^Newsgroups: / || /^Article[\s]+[\d]+[\s]+of/ || /^Path: /) {
# News or mail thingie...
@lines = split(/\n/);
foreach $i (@lines) {
if ($i =~ /^Subject: (.*)$/) {
$abstract .= $1 . "\n";
}
if ($i =~ /^Newsgroups: (.*)$/) {
$abstract .= $i . "\n";
}
if ($i =~ /^Organization: (.*)$/) {
$abstract .= $i . "\n";
}
if ($i =~ /^Summary: (.*)$/) {
$abstract .= $1 . "\n";
}
if ($i =~ /^From: (.*)$/) {
$abstract .= $i . "\n";
}
if ($i =~ /^Keywords: (.*)$/) {
$abstract .= $1 . "\n";
}
}
}
elsif (/^\#!\/.*perl/ || /^\#!\/.*sh/) {
@lines = split(/\n/);
shift(@lines);
foreach $i (@lines) {
if (/\#/) {
$abstract .= "$i\n";
}
}
}
else {
while (<f>) {
if (length($firstpara) < 300) {
$firstpara .= "\n$_";
}
if (/^[\s]+Abstract/i) {
$abstract .= $_;
}
if ($lastpara =~ /Abstract[\s]+$/i) {
$abstract .= $_;
}
if (/^[\s]+Summary/i) {
$abstract .= $_;
}
if ($lastpara =~ /Summary[\s]+$/i) {
$abstract .= $_;
}
$lastpara = $_;
}
}
$len = length($abstract);
exit if ($len == $size);
$abstract = $firstpara if ($len == 0);
print "$abstract\n";
if ($cacheit) {
open(abstractout, ">$filenamebase.abstract");
print abstractout "$abstract\n";
close(abstractout);
}
sub FindFiletoAbstract {
local($fname) = @_;
local($base, $f);
return($fname) if ( -f $fname);
#
# Probably not a text file...
#
$fname =~ m/^(.*)\/([^\/]+)$/;
$base = $1;
$f = $2;
if (!($fname =~ /\//)) {
$base = ".";
$f = $fname;
}
opendir(thedir, $base);
@files = readdir(thedir);
foreach $i (@files) {
if ($i =~ /^$f/) {
foreach $t (keys(%txtconvert)) {
return("$base/$i") if ($i =~ /$t$/i);
}
return("$base/$i") if ($i =~ /txt$/i);
push(@ourfiles, $i)
}
}
closedir(thedir);
return($ourfiles[1]);
}
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