[537] | 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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[4] | 25 |
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| 26 | package plugin;
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| 27 |
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[7829] | 28 | use strict; # to pick up typos and undeclared variables...
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| 29 | no strict 'refs'; # ...but allow filehandles to be variables and vice versa
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[10579] | 30 | no strict 'subs';
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[7829] | 31 |
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[134] | 32 | require util;
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[7829] | 33 | use gsprintf 'gsprintf';
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[4] | 34 |
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[15873] | 35 | # mapping from old plugin names to new ones for backwards compatibility
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| 36 | # can remove at sometime in future when we no longer want to support old xxPlug plugins
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| 37 | my $plugin_name_map = {
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| 38 | 'ArcPlug' => 'ArchivesInfPlugin',
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| 39 | 'RecPlug' => 'DirectoryPlugin',
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| 40 | 'TEXTPlug' => 'TextPlugin',
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| 41 | 'EMAILPlug' => 'EmailPlugin',
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| 42 | 'SRCPlug' => 'SourceCodePlugin',
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| 43 | 'NULPlug' => 'NulPlugin',
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| 44 | 'W3ImgPlug' => 'W3ImagePlugin',
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| 45 | 'PagedImgPlug' => 'PagedImagePlugin'
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| 46 | };
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| 47 |
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[7829] | 48 | # global variables
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[2785] | 49 | my $stats = {'num_processed' => 0,
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| 50 | 'num_blocked' => 0,
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| 51 | 'num_not_processed' => 0,
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[7363] | 52 | 'num_not_recognised' => 0,
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[2785] | 53 | 'num_archives' => 0
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| 54 | };
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| 55 |
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[7829] | 56 | #globaloptions contains any options that should be passed to all plugins
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| 57 | my ($verbosity, $outhandle, $failhandle, $globaloptions);
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[5682] | 58 |
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[15873] | 59 | sub get_valid_pluginname {
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| 60 | my ($pluginname) = @_;
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| 61 | my $valid_name = $pluginname;
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| 62 | if (defined $plugin_name_map->{$pluginname}) {
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| 63 | $valid_name = $plugin_name_map->{$pluginname};
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| 64 | } elsif ($pluginname =~ /Plug$/) {
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| 65 | $valid_name =~ s/Plug/Plugin/;
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| 66 |
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| 67 | }
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| 68 | return $valid_name;
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| 69 | }
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[14933] | 70 | sub load_plugin_require
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| 71 | {
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| 72 | my ($pluginname) = @_;
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| 73 |
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| 74 | my @check_list = ();
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| 75 |
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| 76 | # pp_plugname shorthand for 'perllib' 'plugin' '$pluginname.pm'
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| 77 | my $pp_plugname
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| 78 | = &util::filename_cat('perllib', 'plugins', "${pluginname}.pm");
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| 79 | my $collectdir = $ENV{'GSDLCOLLECTDIR'};
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| 80 |
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[10579] | 81 | # find the plugin
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[14239] | 82 | if (defined($ENV{'GSDLCOLLECTION'}))
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| 83 | {
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[14933] | 84 | my $customplugname
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| 85 | = &util::filename_cat($collectdir, "custom",$ENV{'GSDLCOLLECTION'},
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| 86 | $pp_plugname);
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| 87 | push(@check_list,$customplugname);
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[14239] | 88 | }
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[14933] | 89 |
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| 90 | my $colplugname = &util::filename_cat($collectdir, $pp_plugname);
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| 91 | push(@check_list,$colplugname);
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| 92 |
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| 93 | if (defined $ENV{'GSDLEXTS'}) {
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| 94 |
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| 95 | my $ext_prefix = &util::filename_cat($ENV{'GSDLHOME'}, "ext");
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| 96 |
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| 97 | my @extensions = split(/:/,$ENV{'GSDLEXTS'});
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| 98 | foreach my $e (@extensions) {
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| 99 | my $extplugname = &util::filename_cat($ext_prefix, $e, $pp_plugname);
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| 100 | push(@check_list,$extplugname);
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| 101 |
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| 102 | }
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| 103 | }
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| 104 |
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| 105 |
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| 106 | my $mainplugname = &util::filename_cat($ENV{'GSDLHOME'}, $pp_plugname);
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| 107 | push(@check_list,$mainplugname);
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| 108 |
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| 109 | my $success=0;
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| 110 | foreach my $plugname (@check_list) {
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| 111 | if (-e $plugname) {
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| 112 | require $plugname;
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| 113 | $success=1;
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| 114 | last;
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| 115 | }
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| 116 | }
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| 117 |
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| 118 | if (!$success) {
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[10579] | 119 | &gsprintf(STDERR, "{plugin.could_not_find_plugin}\n",
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[14933] | 120 | $pluginname);
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[10579] | 121 | die "\n";
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| 122 | }
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[14933] | 123 | }
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[10579] | 124 |
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[14933] | 125 | sub load_plugin_for_info {
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| 126 | my ($pluginname) = shift @_;
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[15873] | 127 | $pluginname = &get_valid_pluginname($pluginname);
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[14933] | 128 | load_plugin_require($pluginname);
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| 129 |
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[10579] | 130 | # create a plugin object
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| 131 | my ($plugobj);
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| 132 | my $options = "-gsdlinfo";
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| 133 |
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| 134 | eval ("\$plugobj = new \$pluginname([],[$options])");
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| 135 | die "$@" if $@;
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| 136 |
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| 137 | return $plugobj;
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| 138 | }
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| 139 |
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[4] | 140 | sub load_plugins {
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[1431] | 141 | my ($plugin_list) = shift @_;
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[12968] | 142 | my $incremental;
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| 143 | ($verbosity, $outhandle, $failhandle, $globaloptions, $incremental) = @_; # globals
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[4] | 144 | my @plugin_objects = ();
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[12968] | 145 | $incremental = 0 unless (defined $incremental && $incremental == 1);
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[1243] | 146 | $verbosity = 2 unless defined $verbosity;
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[7829] | 147 | $outhandle = 'STDERR' unless defined $outhandle;
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| 148 | $failhandle = 'STDERR' unless defined $failhandle;
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[1243] | 149 |
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[13933] | 150 | my $colplugindir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"perllib/plugins");
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| 151 | unshift (@INC, $colplugindir);
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| 152 |
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[6584] | 153 | map { $_ = "\"$_\""; } @$globaloptions;
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| 154 | my $globals = join (",", @$globaloptions);
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| 155 |
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[7829] | 156 | foreach my $pluginoptions (@$plugin_list) {
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[809] | 157 | my $pluginname = shift @$pluginoptions;
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| 158 | next unless defined $pluginname;
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[15873] | 159 | $pluginname = &get_valid_pluginname($pluginname);
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[14933] | 160 | load_plugin_require($pluginname);
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[4] | 161 |
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| 162 | # create a plugin object
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| 163 | my ($plugobj);
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[809] | 164 | map { $_ = "\"$_\""; } @$pluginoptions;
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| 165 | my $options = join (",", @$pluginoptions);
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[6584] | 166 | if ($globals) {
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| 167 | if (@$pluginoptions) {
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| 168 | $options .= ",";
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| 169 | }
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| 170 | $options .= "$globals";
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| 171 | }
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[1244] | 172 | $options =~ s/\$/\\\$/g;
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[7904] | 173 |
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[10218] | 174 | eval ("\$plugobj = new \$pluginname([],[$options])");
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[4] | 175 | die "$@" if $@;
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[809] | 176 |
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[1243] | 177 | # initialize plugin
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[2785] | 178 | $plugobj->init($verbosity, $outhandle, $failhandle);
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[10478] | 179 |
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[12968] | 180 | $plugobj->set_incremental($incremental);
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[1243] | 181 |
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[4] | 182 | # add this object to the list
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| 183 | push (@plugin_objects, $plugobj);
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| 184 | }
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| 185 |
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| 186 | return \@plugin_objects;
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| 187 | }
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| 188 |
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[835] | 189 |
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| 190 | sub begin {
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[11333] | 191 | my ($pluginfo, $base_dir, $processor, $maxdocs, $gli) = @_;
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[835] | 192 |
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[11333] | 193 | map { $_->{'gli'} = $gli; } @$pluginfo;
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[835] | 194 | map { $_->begin($pluginfo, $base_dir, $processor, $maxdocs); } @$pluginfo;
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| 195 | }
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| 196 |
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[16381] | 197 | sub file_block_read {
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| 198 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
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[10155] | 199 |
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[16381] | 200 |
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| 201 | $gli = 0 unless defined $gli;
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| 202 |
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| 203 | my $rv = 0;
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| 204 | my $glifile = $file;
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| 205 |
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| 206 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 207 |
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| 208 | # Announce to GLI that we are handling a file
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| 209 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 210 |
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| 211 | # the .kill file is a handy (if not very elegant) way of aborting
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| 212 | # an import.pl or buildcol.pl process
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| 213 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 214 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 215 | die "\n";
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| 216 | }
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| 217 |
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| 218 | foreach my $plugobj (@$pluginfo) {
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| 219 |
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| 220 | $rv = $plugobj->file_block_read($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli);
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| 221 | #last if (defined $rv && $rv==1); # stop this file once we have found something to 'process' it
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| 222 | }
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| 223 |
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| 224 | }
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| 225 |
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| 226 |
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[8515] | 227 | sub metadata_read {
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[16381] | 228 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli, $aux) = @_;
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[8515] | 229 |
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| 230 | $maxdocs = -1 unless defined $maxdocs && $maxdocs =~ /\d/;
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| 231 | $gli = 0 unless defined $gli;
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| 232 |
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| 233 | my $rv = 0;
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| 234 | my $glifile = $file;
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| 235 |
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| 236 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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| 237 |
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| 238 | # Announce to GLI that we are handling a file
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| 239 | print STDERR "<File n='$glifile'>\n" if $gli;
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| 240 |
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| 241 | # the .kill file is a handy (if not very elegant) way of aborting
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| 242 | # an import.pl or buildcol.pl process
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| 243 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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| 244 | gsprintf($outhandle, "{plugin.kill_file}\n");
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| 245 | die "\n";
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| 246 | }
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| 247 |
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| 248 | my $had_error = 0;
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| 249 | # pass this file by each of the plugins in turn until one
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| 250 | # is found which will process it
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| 251 | # read must return:
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| 252 | # undef - could not recognise
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| 253 | # -1 - tried but error
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| 254 | # 0 - blocked
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| 255 | # anything else for successful processing
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| 256 |
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| 257 | foreach my $plugobj (@$pluginfo) {
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| 258 |
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[16381] | 259 | $rv = $plugobj->metadata_read($pluginfo, $base_dir, $file, $block_hash,
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[8515] | 260 | $metadata, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli, $aux);
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| 261 |
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| 262 | if (defined $rv) {
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| 263 | if ($rv == -1) {
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| 264 | # an error has occurred
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| 265 | $had_error = 1;
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| 266 | print STDERR "<ProcessingError n='$glifile'>\n" if $gli;
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| 267 | } else {
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| 268 | return $rv;
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| 269 | }
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| 270 | } # else undefined - was not recognised by the plugin
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| 271 | }
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| 272 |
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| 273 | return 0;
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| 274 | }
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| 275 |
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[4] | 276 | sub read {
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[16381] | 277 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli, $aux) = @_;
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[4] | 278 |
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[809] | 279 | $maxdocs = -1 unless defined $maxdocs && $maxdocs =~ /\d/;
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[9853] | 280 | $total_count = 0 unless defined $total_count && $total_count =~ /\d/;
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[6332] | 281 | $gli = 0 unless defined $gli;
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| 282 |
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[315] | 283 | my $rv = 0;
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[7363] | 284 | my $glifile = $file;
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[7904] | 285 |
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[7363] | 286 | $glifile =~ s/^[\/\\]+//; # file sometimes starts with a / so get rid of it
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[8515] | 287 |
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[6332] | 288 | # Announce to GLI that we are handling a file
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[7363] | 289 | print STDERR "<File n='$glifile'>\n" if $gli;
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[8515] | 290 |
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[1454] | 291 | # the .kill file is a handy (if not very elegant) way of aborting
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| 292 | # an import.pl or buildcol.pl process
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| 293 | if (-e &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, ".kill")) {
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[7829] | 294 | gsprintf($outhandle, "{plugin.kill_file}\n");
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[1454] | 295 | die "\n";
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| 296 | }
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[16381] | 297 |
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[7363] | 298 | my $had_error = 0;
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[4] | 299 | # pass this file by each of the plugins in turn until one
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| 300 | # is found which will process it
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[7363] | 301 | # read must return:
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| 302 | # undef - could not recognise
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| 303 | # -1 - tried but error
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| 304 | # 0 - blocked
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| 305 | # anything else for successful processing
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[8515] | 306 |
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[7829] | 307 | foreach my $plugobj (@$pluginfo) {
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[8515] | 308 |
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| 309 | $rv = $plugobj->read($pluginfo, $base_dir, $file,
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[16381] | 310 | $block_hash, $metadata, $processor, $maxdocs,
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| 311 | $total_count, $gli, $aux);
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[8515] | 312 |
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| 313 | if (defined $rv) {
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[7363] | 314 | if ($rv == -1) {
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[7904] | 315 | # an error has occurred
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[7363] | 316 | $had_error = 1;
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| 317 | } else {
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[7904] | 318 | return $rv;
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[7363] | 319 | }
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| 320 | } # else undefined - was not recognised by the plugin
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[4] | 321 | }
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[7904] | 322 |
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[7363] | 323 | if ($had_error) {
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| 324 | # was recognised but couldn't be processed
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| 325 | if ($verbosity >= 2) {
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[7829] | 326 | gsprintf($outhandle, "{plugin.no_plugin_could_process}\n", $file);
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[7363] | 327 | }
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| 328 | # tell the GLI that it was not processed
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| 329 | print STDERR "<NonProcessedFile n='$glifile'>\n" if $gli;
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[7904] | 330 |
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[7829] | 331 | gsprintf($failhandle, "$file: {plugin.no_plugin_could_process_this_file}\n");
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[7363] | 332 | $stats->{'num_not_processed'} ++;
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| 333 | } else {
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| 334 | # was not recognised
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| 335 | if ($verbosity >= 2) {
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[7829] | 336 | gsprintf($outhandle, "{plugin.no_plugin_could_recognise}\n",$file);
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[7363] | 337 | }
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| 338 | # tell the GLI that it was not processed
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| 339 | print STDERR "<NonRecognisedFile n='$glifile'>\n" if $gli;
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| 340 |
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[7829] | 341 | gsprintf($failhandle, "$file: {plugin.no_plugin_could_recognise_this_file}\n");
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[7363] | 342 | $stats->{'num_not_recognised'} ++;
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[170] | 343 | }
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[315] | 344 | return 0;
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[4] | 345 | }
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| 346 |
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[2785] | 347 | # write out some general stats that the plugins have compiled - note that
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| 348 | # the buildcol.pl process doesn't currently call this process so the stats
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| 349 | # are only output after import.pl -
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| 350 | sub write_stats {
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[6332] | 351 | my ($pluginfo, $statshandle, $faillog, $gli) = @_;
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[2785] | 352 |
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[6332] | 353 | $gli = 0 unless defined $gli;
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| 354 |
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[7829] | 355 | foreach my $plugobj (@$pluginfo) {
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[2785] | 356 | $plugobj->compile_stats($stats);
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| 357 | }
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| 358 |
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| 359 | my $total = $stats->{'num_processed'} + $stats->{'num_blocked'} +
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[7363] | 360 | $stats->{'num_not_processed'} + $stats->{'num_not_recognised'};
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[2785] | 361 |
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[7363] | 362 | print STDERR "<ImportComplete considered='$total' processed='$stats->{'num_processed'}' blocked='$stats->{'num_blocked'}' ignored='$stats->{'num_not_recognised'}' failed='$stats->{'num_not_processed'}'>\n" if $gli;
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[6332] | 363 |
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[2785] | 364 | if ($total == 1) {
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[7829] | 365 | gsprintf($statshandle, "* {plugin.one_considered}\n");
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[2785] | 366 | } else {
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[7829] | 367 | gsprintf($statshandle, "* {plugin.n_considered}\n", $total);
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[2785] | 368 | }
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| 369 | if ($stats->{'num_archives'}) {
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[5682] | 370 | if ($stats->{'num_archives'} == 1) {
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[7829] | 371 | gsprintf($statshandle, " ({plugin.including_archive})\n");
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[5682] | 372 | }
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| 373 | else {
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[7829] | 374 | gsprintf($statshandle, " ({plugin.including_archives})\n",
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| 375 | $stats->{'num_archives'});
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[5682] | 376 | }
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[2785] | 377 | }
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| 378 | if ($stats->{'num_processed'} == 1) {
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[7829] | 379 | gsprintf($statshandle, "* {plugin.one_included}\n");
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[2785] | 380 | } else {
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[7829] | 381 | gsprintf($statshandle, "* {plugin.n_included}\n", $stats->{'num_processed'});
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[2785] | 382 | }
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[7363] | 383 | if ($stats->{'num_not_recognised'}) {
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| 384 | if ($stats->{'num_not_recognised'} == 1) {
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[7829] | 385 | gsprintf($statshandle, "* {plugin.one_unrecognised}\n");
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[7363] | 386 | } else {
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[7829] | 387 | gsprintf($statshandle, "* {plugin.n_unrecognised}\n",
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| 388 | $stats->{'num_not_recognised'});
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[7363] | 389 | }
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| 390 |
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| 391 | }
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[2797] | 392 | if ($stats->{'num_not_processed'}) {
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| 393 | if ($stats->{'num_not_processed'} == 1) {
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[7829] | 394 | gsprintf($statshandle, "* {plugin.one_rejected}\n");
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[2797] | 395 | } else {
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[7829] | 396 | gsprintf($statshandle, "* {plugin.n_rejected}\n",
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| 397 | $stats->{'num_not_processed'});
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[5682] | 398 | }
|
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[7363] | 399 | }
|
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| 400 | if ($stats->{'num_not_processed'} || $stats->{'num_not_recognised'}) {
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[7829] | 401 | gsprintf($statshandle, " {plugin.see_faillog}\n", $faillog);
|
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[2797] | 402 | }
|
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[2785] | 403 | }
|
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| 404 |
|
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[835] | 405 | sub end {
|
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[1587] | 406 | my ($pluginfo, $processor) = @_;
|
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| 407 | map { $_->end($processor); } @$pluginfo;
|
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[835] | 408 | }
|
---|
[4] | 409 |
|
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[10155] | 410 | sub deinit {
|
---|
| 411 | my ($pluginfo, $processor) = @_;
|
---|
| 412 |
|
---|
| 413 |
|
---|
| 414 | map { $_->deinit($processor); } @$pluginfo;
|
---|
| 415 | }
|
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| 416 |
|
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[4] | 417 | 1;
|
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