NAME

       CPAN::SQLite::Index - set up or update database tables.

VERSION

       version 0.220

SYNOPSIS

        my $index = CPAN::SQLite::Index->new(setup => 1);
        $index->index();

DESCRIPTION

       This is the main module used to set up or update the database tables used to store
       information from the CPAN and ppm indices. The creation of the object

        my $index = CPAN::SQLite::Index->new(%args);

       accepts two possible arguments:

       •  setup => 1

          This (optional) argument specifies that the database is being set up.  Any existing
          tables will be dropped.

       •  reindex => value

          This (optional) argument specifies distribution names that one would like to reindex in
          an existing database. These may be specified as either a scalar, for a single
          distribution, or as an array reference for a list of distributions.

DETAILS

       Calling

         $index->index();

       will start the indexing procedure. Various messages detailing the progress will written to
       STDOUT, which by default will be captured into a file cpan_sqlite_log.dddddddddd, where
       the extension is the "time" that the method was invoked. Error messages are not captured,
       and will appear in STDERR.

       The steps of the indexing procedure are as follows.

       •   download existing pre-compiled index (optional)

           If CPAN_SQLITE_DOWNLOAD or CPAN_SQLITE_DOWNLOAD_URL variables are set, an already
           existing and up-to-date cpandb.sql file will be downloaded from either specified URL
           or http://cpansqlite.trouchelle.com/ where it's updated every hour. This greatly
           increases performance and decreases CPU and memory consumption during the indexing
           process but if your CPAN mirror is out-of-sync or you're using DarkPAN, it obviously
           wouldn't work. It also wouldn't work without an internet connection.

           See WWW::CPAN::SQLite if you want to setup your own service for pre-compiling the
           database.

           If neither variable is set, this step is skipped.

       •   fetch index data

           The necessary CPAN index files $CPAN/authors/01mailrc.txt.gz and
           $CPAN/modules/02packages.details.txt.gz will be fetched from the CPAN mirror specified
           by the $cpan variable at the beginning of CPAN::SQLite::Index. If you are using this
           option, it is recommended to use the same CPAN mirror with subsequent updates, to
           ensure consistency of the database. As well, the information on the locations of the
           CPAN mirrors used for Template-Toolkit and GeoIP is written.

       •   get index information

           Information from the CPAN indices is extracted through CPAN::SQLite::Info.

       •   get state information

           Unless the "setup" argument within the "new" method of CPAN::SQLite::Index is
           specified, this will get information on the state of the database through
           CPAN::SQLite::State.  A comparison is then made between this information and that
           gathered from the CPAN indices, and if there's a discrepancy in some items, those
           items are marked for either insertion, updating, or deletion, as appropriate.

       •   populate the database

           At this stage the gathered information is used to populate the database, through
           CPAN::SQLite::Populate, either inserting new items, updating existing ones, or
           deleting obsolete items.

SEE ALSO

       CPAN::SQLite::Info, CPAN::SQLite::State, CPAN::SQLite::Populate, and CPAN::SQLite::Util.
       Development takes place on the CPAN-SQLite project at
       <http://sourceforge.net/projects/cpan-search/>.

AUTHORS

       Randy Kobes (passed away on September 18, 2010)

       Serguei Trouchelle <stro@cpan.org>

COPYRIGHT

       Copyright 2006 by Randy Kobes <r.kobes@uwinnipeg.ca>.

       Copyright 2011 by Serguei Trouchelle <stro@cpan.org>.

       Use and redistribution are under the same terms as Perl itself.