| 1 | ###########################################################################
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| 2 | #
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| 3 | # plugin.pm -- functions to handle using plugins
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| 4 | # A component of the Greenstone digital library software
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| 5 | # from the New Zealand Digital Library Project at the
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| 6 | # University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###########################################################################
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| 25 |
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| 26 | package plugin;
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| 27 |
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| 28 |
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| 29 | use strict; # to pick up typos and undeclared variables...
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| 30 | no strict 'refs'; # ...but allow filehandles to be variables and vice versa
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| 31 | no strict 'subs';
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| 32 |
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| 33 | require util;
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| 34 | use gsprintf 'gsprintf';
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| 35 |
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| 36 | # mapping from old plugin names to new ones for backwards compatibility
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| 37 | # can remove at sometime in future when we no longer want to support old xxPlug names in the config file
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| 38 | my $plugin_name_map = {
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| 39 | 'GAPlug' => 'GreenstoneXMLPlugin',
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| 40 | 'ArcPlug' => 'ArchivesInfPlugin',
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| 41 | 'RecPlug' => 'DirectoryPlugin',
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| 42 | 'TEXTPlug' => 'TextPlugin',
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| 43 | 'XMLPlug' => 'ReadXMLFile',
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| 44 | 'EMAILPlug' => 'EmailPlugin',
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| 45 | 'SRCPlug' => 'SourceCodePlugin',
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| 46 | 'NULPlug' => 'NulPlugin',
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| 47 | 'W3ImgPlug' => 'HTMLImagePlugin',
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| 48 | 'PagedImgPlug' => 'PagedImagePlugin',
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| 49 | 'METSPlug' => 'GreenstoneMETSPlugin',
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| 50 | 'PPTPlug' => 'PowerPointPlugin',
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| 51 | 'PSPlug' => 'PostScriptPlugin',
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| 52 | 'DBPlug' => 'DatabasePlugin'
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| 53 | };
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| 54 |
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| 55 | # global variables
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| 56 | my $stats = {'num_processed' => 0,
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| 57 | 'num_blocked' => 0,
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| 58 | 'num_not_processed' => 0,
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| 59 | 'num_not_recognised' => 0,
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| 60 | 'num_archives' => 0
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| 61 | };
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| 62 |
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| 63 | #globaloptions contains any options that should be passed to all plugins
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| 64 | my ($verbosity, $outhandle, $failhandle, $globaloptions);
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| 65 |
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| 66 | sub get_valid_pluginname {
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| 67 | my ($pluginname) = @_;
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| 68 | my $valid_name = $pluginname;
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| 69 | if (defined $plugin_name_map->{$pluginname}) {
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| 70 | $valid_name = $plugin_name_map->{$pluginname};
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| 71 | } elsif ($pluginname =~ /Plug$/) {
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| 72 | $valid_name =~ s/Plug/Plugin/;
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| 73 |
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| 74 | }
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| 75 | return $valid_name;
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| 76 | }
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| 77 |
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| 78 | sub load_plugin_require
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| 79 | {
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| 80 | my ($pluginname) = @_;
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| 81 |
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| 82 | my @check_list = ();
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| 83 |
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| 84 | # pp_plugname shorthand for 'perllib' 'plugin' '$pluginname.pm'
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| 85 | my $pp_plugname
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| 86 | = &util::filename_cat('perllib', 'plugins', "${pluginname}.pm");
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| 87 | my $collectdir = $ENV{'GSDLCOLLECTDIR'};
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| 88 |
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| 89 | # find the plugin
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| 90 | if (defined($ENV{'GSDLCOLLECTION'}))
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| 91 | {
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| 92 | my $customplugname
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| 93 | = &util::filename_cat($collectdir, "custom",$ENV{'GSDLCOLLECTION'},
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| 94 | $pp_plugname);
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| 95 | push(@check_list,$customplugname);
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| 96 | }
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| 97 |
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| 98 | my $colplugname = &util::filename_cat($collectdir, $pp_plugname);
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| 99 | push(@check_list,$colplugname);
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| 100 |
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| 101 | if (defined $ENV{'GSDLEXTS'}) {
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| 102 |
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| 103 | my $ext_prefix = &util::filename_cat($ENV{'GSDLHOME'}, "ext");
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| 104 |
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| 105 | my @extensions = split(/:/,$ENV{'GSDLEXTS'});
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| 106 | foreach my $e (@extensions) {
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| 107 | my $extplugname = &util::filename_cat($ext_prefix, $e, $pp_plugname);
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| 108 | push(@check_list,$extplugname);
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| 109 |
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| 110 | }
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| 111 | }
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| 112 | if (defined $ENV{'GSDL3EXTS'}) {
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| 113 |
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| 114 | my $ext_prefix = &util::filename_cat($ENV{'GSDL3SRCHOME'}, "ext");
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| 115 |
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| 116 | my @extensions = split(/:/,$ENV{'GSDL3EXTS'});
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| 117 | foreach my $e (@extensions) {
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| 118 | my $extplugname = &util::filename_cat($ext_prefix, $e, $pp_plugname);
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| 119 | push(@check_list,$extplugname);
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| 120 |
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| 121 | }
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| 122 | }
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| 123 |
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| 124 |
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| 125 | my $mainplugname = &util::filename_cat($ENV{'GSDLHOME'}, $pp_plugname);
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| 126 | push(@check_list,$mainplugname);
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| 127 |
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| 128 | my $success=0;
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| 129 | foreach my $plugname (@check_list) {
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| 130 | if (-e $plugname) {
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| 131 | require $plugname;
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| 132 | $success=1;
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| 133 | last;
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| 134 | }
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| 135 | }
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| 136 |
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| 137 | if (!$success) {
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| 138 | &gsprintf(STDERR, "{plugin.could_not_find_plugin}\n",
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| 139 | $pluginname);
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| 140 | die "\n";
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| 141 | }
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| 142 | }
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| 143 |
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| 144 | sub load_plugin_for_info {
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| 145 | my ($pluginname) = shift @_;
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| 146 | $pluginname = &get_valid_pluginname($pluginname);
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| 147 | load_plugin_require($pluginname);
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| 148 |
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| 149 | # create a plugin object
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| 150 | my ($plugobj);
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| 151 | my $options = "-gsdlinfo";
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| 152 |
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| 153 | eval ("\$plugobj = new \$pluginname([],[$options])");
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| 154 | die "$@" if $@;
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| 155 |
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| 156 | return $plugobj;
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| 157 | }
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| 158 |
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| 159 | sub load_plugins {
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| 160 | my ($plugin_list) = shift @_;
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| 161 | my $incremental_mode;
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| 162 | ($verbosity, $outhandle, $failhandle, $globaloptions, $incremental_mode) = @_; # globals
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| 163 | my @plugin_objects = ();
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| 164 | $verbosity = 2 unless defined $verbosity;
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| 165 | $outhandle = 'STDERR' unless defined $outhandle;
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| 166 | $failhandle = 'STDERR' unless defined $failhandle;
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| 167 |
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| 168 | my $colplugindir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"perllib/plugins");
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| 169 | unshift (@INC, $colplugindir);
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| 170 |
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| 171 | map { $_ = "\"$_\""; } @$globaloptions;
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| 172 | my $globals = join (",", @$globaloptions);
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| 173 |
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| 174 | foreach my $pluginoptions (@$plugin_list) {
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| 175 | my $pluginname = shift @$pluginoptions;
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| 176 | next unless defined $pluginname;
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| 177 | $pluginname = &get_valid_pluginname($pluginname);
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| 178 | load_plugin_require($pluginname);
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| 179 |
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| 180 | # create a plugin object
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| 181 | my ($plugobj);
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| 182 | map { $_ = "\"$_\""; } @$pluginoptions;
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| 183 | my $options = join (",", @$pluginoptions);
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| 184 | if ($globals) {
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| 185 | if (@$pluginoptions) {
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| 186 | $options .= ",";
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| 187 | }
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| 188 | $options .= "$globals";
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| 189 | }
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| 190 | # need to escape backslash before putting in to the eval
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| 191 | # but watch out for any \" (which shouldn't be further escaped)
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| 192 | $options =~ s/\\([^"])/\\\\$1/g; #"
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| 193 | $options =~ s/\$/\\\$/g;
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| 194 |
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| 195 | eval ("\$plugobj = new \$pluginname([],[$options])");
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| 196 | die "$@" if $@;
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| 197 |
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| 198 | # initialize plugin
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| 199 | $plugobj->init($verbosity, $outhandle, $failhandle);
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| 200 |
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| 201 | $plugobj->set_incremental($incremental_mode);
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| 202 |
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| 203 | # add this object to the list
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| 204 | push (@plugin_objects, $plugobj);
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| 205 | }
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| 206 |
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| 207 | return \@plugin_objects;
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| 208 | }
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| 209 |
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| 210 |
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| 211 | sub begin {
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| 212 | my ($pluginfo, $base_dir, $processor, $maxdocs, $gli) = @_;
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| 213 |
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| 214 | map { $_->{'gli'} = $gli; } @$pluginfo;
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| 215 | map { $_->begin($pluginfo, $base_dir, $processor, $maxdocs); } @$pluginfo;
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| 216 | }
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| 217 |
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| 218 | sub remove_all {
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| 219 | my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
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| 220 |
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| 221 | map { $_->remove_all($pluginfo, $base_dir, $processor, $maxdocs); } @$pluginfo;
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| 222 | }
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| 223 |
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| 224 | sub remove_some {
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| 225 | my ($pluginfo, $infodbtype, $archivedir, $deleted_files) = @_;
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| 226 | return if (scalar(@$deleted_files)==0);
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| 227 | $infodbtype = "gdbm" if $infodbtype eq "gdbm-txtgz";
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| 228 | my $arcinfo_src_filename = &dbutil::get_infodb_file_path($infodbtype, "archiveinf-src", $archivedir);
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| 229 |
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| 230 | foreach my $file (@$deleted_files) {
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| 231 | # use 'archiveinf-src' info database to look up all the OIDs
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| 232 | # that this file is used in (note in most cases, it's just one OID)
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| 233 |
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| 234 | my $src_rec = &dbutil::read_infodb_entry($infodbtype, $arcinfo_src_filename, $file);
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| 235 | my $oids = $src_rec->{'oid'};
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| 236 | my $rv;
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| 237 | foreach my $plugobj (@$pluginfo) {
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| 238 |
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| 239 | $rv = $plugobj->remove_one($file, $oids, $archivedir);
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| 240 | if (defined $rv && $rv != -1) {
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| 241 | return $rv;
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| 242 | } # else undefined (was not recognised by the plugin) or there was an error, try the next one
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| 243 | }
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| 244 | return 0;
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| 245 | }
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| 246 |
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| 247 | }
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| 248 | sub file_block_read {
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| 249 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
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| 250 |
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| 251 |
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| 252 | $gli = 0 unless defined $gli;
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| 253 |
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| 254 | my $rv = 0;
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| 255 | my $glifile = $file;
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| 256 |
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| 257 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 258 |
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| 259 | # Announce to GLI that we are handling a file
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| 260 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 261 |
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| 262 | # the .kill file is a handy (if not very elegant) way of aborting
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| 263 | # an import.pl or buildcol.pl process
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| 264 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 265 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 266 | die "\n";
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| 267 | }
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| 268 |
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| 269 | foreach my $plugobj (@$pluginfo) {
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| 270 |
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| 271 | $rv = $plugobj->file_block_read($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli);
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| 272 | #last if (defined $rv && $rv==1); # stop this file once we have found something to 'process' it
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| 273 | }
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| 274 |
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| 275 | }
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| 276 |
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| 277 |
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| 278 | sub metadata_read {
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| 279 | my ($pluginfo, $base_dir, $file, $block_hash,
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| 280 | $extrametakeys, $extrametadata, $extrametafile,
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| 281 | $processor, $gli, $aux) = @_;
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| 282 |
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| 283 | $gli = 0 unless defined $gli;
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| 284 |
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| 285 | my $rv = 0;
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| 286 | my $glifile = $file;
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| 287 |
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| 288 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 289 |
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| 290 | # Announce to GLI that we are handling a file
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| 291 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 292 |
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| 293 | # the .kill file is a handy (if not very elegant) way of aborting
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| 294 | # an import.pl or buildcol.pl process
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| 295 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 296 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 297 | die "\n";
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| 298 | }
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| 299 |
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| 300 | my $had_error = 0;
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| 301 | # pass this file by each of the plugins in turn until one
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| 302 | # is found which will process it
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| 303 | # read must return:
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| 304 | # undef - could not recognise
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| 305 | # -1 - tried but error
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| 306 | # 0 - blocked
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| 307 | # anything else for successful processing
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| 308 |
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| 309 | foreach my $plugobj (@$pluginfo) {
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| 310 |
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| 311 | $rv = $plugobj->metadata_read($pluginfo, $base_dir, $file, $block_hash,
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| 312 | $extrametakeys, $extrametadata, $extrametafile,
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| 313 | $processor, $gli, $aux);
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| 314 |
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| 315 | if (defined $rv) {
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| 316 | if ($rv == -1) {
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| 317 | # an error has occurred
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| 318 | $had_error = 1;
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| 319 | print STDERR "<ProcessingError n='$glifile'>\n" if $gli;
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| 320 | } else {
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| 321 | return $rv;
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| 322 | }
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| 323 | } # else undefined - was not recognised by the plugin
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| 324 | }
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| 325 |
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| 326 | return 0;
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| 327 | }
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| 328 |
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| 329 | sub read {
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| 330 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli, $aux) = @_;
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| 331 |
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| 332 | $maxdocs = -1 unless defined $maxdocs && $maxdocs =~ /\d/;
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| 333 | $total_count = 0 unless defined $total_count && $total_count =~ /\d/;
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| 334 | $gli = 0 unless defined $gli;
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| 335 |
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| 336 | my $rv = 0;
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| 337 | my $glifile = $file;
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| 338 |
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| 339 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 340 |
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| 341 | # Announce to GLI that we are handling a file
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| 342 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 343 |
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| 344 | # the .kill file is a handy (if not very elegant) way of aborting
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| 345 | # an import.pl or buildcol.pl process
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| 346 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 347 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 348 | die "\n";
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| 349 | }
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| 350 |
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| 351 | my $had_error = 0;
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| 352 | # pass this file by each of the plugins in turn until one
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| 353 | # is found which will process it
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| 354 | # read must return:
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| 355 | # undef - could not recognise
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| 356 | # -1 - tried but error
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| 357 | # 0 - blocked
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| 358 | # anything else for successful processing
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| 359 |
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| 360 | foreach my $plugobj (@$pluginfo) {
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| 361 |
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| 362 | $rv = $plugobj->read($pluginfo, $base_dir, $file,
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| 363 | $block_hash, $metadata, $processor, $maxdocs,
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| 364 | $total_count, $gli, $aux);
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| 365 |
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| 366 | if (defined $rv) {
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| 367 | if ($rv == -1) {
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| 368 | # an error has occurred
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| 369 | $had_error = 1;
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| 370 | } else {
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| 371 | return $rv;
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| 372 | }
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| 373 | } # else undefined - was not recognised by the plugin
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| 374 | }
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| 375 |
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| 376 | if ($had_error) {
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| 377 | # was recognised but couldn't be processed
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| 378 | if ($verbosity >= 2) {
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| 379 | gsprintf($outhandle, "{plugin.no_plugin_could_process}\n", $file);
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| 380 | }
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| 381 | # tell the GLI that it was not processed
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| 382 | print STDERR "<NonProcessedFile n='$glifile'>\n" if $gli;
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| 383 |
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| 384 | gsprintf($failhandle, "$file: {plugin.no_plugin_could_process_this_file}\n");
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| 385 | $stats->{'num_not_processed'} ++;
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| 386 | } else {
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| 387 | # was not recognised
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| 388 | if ($verbosity >= 2) {
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| 389 | gsprintf($outhandle, "{plugin.no_plugin_could_recognise}\n",$file);
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| 390 | }
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| 391 | # tell the GLI that it was not processed
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| 392 | print STDERR "<NonRecognisedFile n='$glifile'>\n" if $gli;
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| 393 |
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| 394 | gsprintf($failhandle, "$file: {plugin.no_plugin_could_recognise_this_file}\n");
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| 395 | $stats->{'num_not_recognised'} ++;
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| 396 | }
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| 397 | return 0;
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| 398 | }
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| 399 |
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| 400 | # write out some general stats that the plugins have compiled - note that
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| 401 | # the buildcol.pl process doesn't currently call this process so the stats
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| 402 | # are only output after import.pl -
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| 403 | sub write_stats {
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| 404 | my ($pluginfo, $statshandle, $faillog, $gli) = @_;
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| 405 |
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| 406 | $gli = 0 unless defined $gli;
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| 407 |
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| 408 | foreach my $plugobj (@$pluginfo) {
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| 409 | $plugobj->compile_stats($stats);
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| 410 | }
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| 411 |
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| 412 | my $total = $stats->{'num_processed'} + $stats->{'num_blocked'} +
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| 413 | $stats->{'num_not_processed'} + $stats->{'num_not_recognised'};
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| 414 |
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| 415 | print STDERR "<ImportComplete considered='$total' processed='$stats->{'num_processed'}' blocked='$stats->{'num_blocked'}' ignored='$stats->{'num_not_recognised'}' failed='$stats->{'num_not_processed'}'>\n" if $gli;
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| 416 |
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| 417 | if ($total == 1) {
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| 418 | gsprintf($statshandle, "* {plugin.one_considered}\n");
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| 419 | } else {
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| 420 | gsprintf($statshandle, "* {plugin.n_considered}\n", $total);
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| 421 | }
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| 422 | if ($stats->{'num_archives'}) {
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| 423 | if ($stats->{'num_archives'} == 1) {
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| 424 | gsprintf($statshandle, " ({plugin.including_archive})\n");
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| 425 | }
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| 426 | else {
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| 427 | gsprintf($statshandle, " ({plugin.including_archives})\n",
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| 428 | $stats->{'num_archives'});
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| 429 | }
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| 430 | }
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| 431 | if ($stats->{'num_processed'} == 1) {
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| 432 | gsprintf($statshandle, "* {plugin.one_included}\n");
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| 433 | } else {
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| 434 | gsprintf($statshandle, "* {plugin.n_included}\n", $stats->{'num_processed'});
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| 435 | }
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| 436 | if ($stats->{'num_not_recognised'}) {
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| 437 | if ($stats->{'num_not_recognised'} == 1) {
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| 438 | gsprintf($statshandle, "* {plugin.one_unrecognised}\n");
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| 439 | } else {
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| 440 | gsprintf($statshandle, "* {plugin.n_unrecognised}\n",
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| 441 | $stats->{'num_not_recognised'});
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| 442 | }
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| 443 |
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| 444 | }
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| 445 | if ($stats->{'num_not_processed'}) {
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| 446 | if ($stats->{'num_not_processed'} == 1) {
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| 447 | gsprintf($statshandle, "* {plugin.one_rejected}\n");
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| 448 | } else {
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| 449 | gsprintf($statshandle, "* {plugin.n_rejected}\n",
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|---|
| 450 | $stats->{'num_not_processed'});
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| 451 | }
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| 452 | }
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|---|
| 453 | if ($stats->{'num_not_processed'} || $stats->{'num_not_recognised'}) {
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| 454 | gsprintf($statshandle, " {plugin.see_faillog}\n", $faillog);
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| 455 | }
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|---|
| 456 | }
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|---|
| 457 |
|
|---|
| 458 | sub end {
|
|---|
| 459 | my ($pluginfo, $processor) = @_;
|
|---|
| 460 | map { $_->end($processor); } @$pluginfo;
|
|---|
| 461 | }
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|---|
| 462 |
|
|---|
| 463 | sub deinit {
|
|---|
| 464 | my ($pluginfo, $processor) = @_;
|
|---|
| 465 |
|
|---|
| 466 |
|
|---|
| 467 | map { $_->deinit($processor); } @$pluginfo;
|
|---|
| 468 | }
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|---|
| 469 |
|
|---|
| 470 | 1;
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|---|
