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File:  [LON-CAPA] / loncom / build / help_graphics_converter.pl
Revision 1.5: download - view: text, annotated - select for diffs
Mon Jan 2 11:37:02 2012 UTC (12 years, 10 months ago) by foxr
Branches: MAIN
CVS tags: version_2_12_X, version_2_11_X, version_2_11_5_msu, version_2_11_5, version_2_11_4_uiuc, version_2_11_4_msu, version_2_11_4, version_2_11_3_uiuc, version_2_11_3_msu, version_2_11_3, version_2_11_2_uiuc, version_2_11_2_msu, version_2_11_2_educog, version_2_11_2, version_2_11_1, version_2_11_0_RC3, version_2_11_0_RC2, version_2_11_0_RC1, version_2_11_0, HEAD, BZ4492-merge, BZ4492-feature_horizontal_radioresponse, BZ4492-feature_Support_horizontal_radioresponse, BZ4492-Support_horizontal_radioresponse
BZ 6534 - Make the converter aware of relative mtimes as well as
just the non-empty existence of the destination file.

# The LearningOnline Network
# help_graphics_converter - converts help .png into .gif and .eps
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# YEAR=2002
# 7/4, Jeremy Bowers
#
###

use strict;

##
#  Sub to determine the relative modification dates of files:
#
# @param file1 - First file
# @param file2 - Seond file
#
# @return - 0 if file 1's mtime is <= file2's 1 otherwise.
sub newer {
    my ($file1, $file2) = @_;

    # IF file2 does not exist, return false to force the build:

    if (not (-s $file2)) {
	return 0;
    }

    # Check modification times if file2 exists:

    my $m1 = (stat($file1))[9];
    my $m2 = (stat($file2))[9];

    return $m2 > $m1;
}

my $dirprefix = "../html/adm/help/";

# Check that the png directory exists
if (not (-d $dirprefix . "png/"))
{ die "Can't convert help graphics because the png directory is not ".
      "installed."; }

mkdir $dirprefix . "gif/", 0755;
mkdir $dirprefix . "eps/", 0755;

my $convert = `which convert`;
if ($convert eq '')
{
    open LOG, ">> WARNINGS";
    print LOG "**** ERROR **** ImageMagick is not installed. You must install ImageMagick to use LON-CAPA. Please see your installation instructions.\n";
    print "**** ERROR **** ImageMagick is not installed. You must install ImageMagick to use LON-CAPA. Please see your installation instructions.\n";
    exit;
}

foreach my $file (glob($dirprefix . "png/*.png"))
{
    my $filename = substr($file, rindex($file, "/") + 1);
    my $gifdest = $dirprefix . "gif/" . substr($filename, 0, -4) . ".gif";
    my $epsdest = $dirprefix . "eps/" . substr($filename, 0, -4) . ".eps";
    
    
    print "Converting $filename... gif";
    system ("convert $file $gifdest\n") if (not &newer($file, $gifdest));
    print " eps";
    system ("convert $file $epsdest\n") if (not &newer($file, $epsdest));
    print " done.\n";
}
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