/ 
SVN-Log-Index-0.51
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/ SVN::Log::Index

NAME

SVN::Log::Index - Index and search over Subversion commit logs.

SYNOPSIS

my $index = SVN::Log::Index->new({ index_path => '/path/to/index' });

if($creating) {    # Create from scratch if necessary
  $index->create({ repo_url => 'url://for/repo' });
}

$index->open();    # And then open it

# Now add revisions from the repo to the index
$index->add({ start_rev => $start_rev,
              end_rev   => $end_rev);

# And query the index
my $results = $index->search('query');

DESCRIPTION

SVN::Log::Index builds a KinoSearch index of commit logs from a Subversion repository and allows you to do arbitrary full text searches over it.

METHODS

new

my $index = SVN::Log::Index->new({
    index_path => '/path/to/index'
});

Create a new index object.

The single argument is a hash ref. Currently only one key is valid.

index_path

The path that contains (or will contain) the index files.

This method prepares the object for use, but does not make any changes on disk.

create

$index->create({
    repo_url       => 'url://for/repo',
    analyzer_class => 'KinoSearch::Analysis::PolyAnalyzer',
    analyzer_opts  => [ language => 'en' ],
    overwrite      => 0, # Optional
});

This method creates a new index, in the index_path given when the object was created.

The single argument is a hash ref, with the following possible keys.

repo_url

The URL for the Subversion repository that is going to be indexed.

analyzer_class

A string giving the name of the class that will analyse log message text and tokenise it. This should derive from the KinoSearch::Analysis::Analyzer class. SVN::Log::Index will call this class' new() method.

Once an analyzer class has been chosen for an index it can not be changed without deleting the index and creating it afresh.

The default value is KinoSearch::Analysis::PolyAnalyzer.

analyzer_opts

A list of options to be passed, as is, to the constructor for the analyzer_class object.

overwrite

A boolean indicating whether or not a pre-existing index_path should be overwritten.

Given this sequence;

my $index = SVN::Log::Index->new({index_path => '/path'});
$index->create({repo_url => 'url://for/repo'});

The call to create() will fail if /path already exists.

If overwrite is set to a true value then /path will be cleared.

The default is false.

After creation the index directory will exist on disk, and a configuration file containing the create()-time parameters will be created in the index directory.

Newly created indexes must still be opened.

open

$index->open();

Opens the index, in preparation for adding or removing entries.

add

$index->add ({
    start_rev      => $start_rev,  # number, or 'HEAD'
    end_rev        => $end_rev,    # number, or 'HEAD'
});

Add one or more log messages to the index.

The single argument is a hash ref, with the following possible keys.

start_rev

The first revision to add to the index. May be given as HEAD to mean the repository's most recent (youngest) revision.

This key is mandatory.

end_rev

The last revision to add to the index. May be given as HEAD to mean the repository's most recent (youngest) revision.

This key is optional. If not included then only the revision specified by start_rev will be indexed.

Revisions from start_rev to end_rev are added inclusive. start_rev and end_rev may be given in ascending or descending order. Either:

$index->add({ start_rev => 1, end_rev => 10 });

or

$index->add({ start_rev => 10, end_rev => 1 });

In both cases, revisons are indexed in ascending order, so revision 1, followed by revision 2, and so on, up to revision 10.

get_last_indexed_rev

my $rev = $index->get_last_indexed_rev();

Returns the revision number that was most recently added to the index.

Most useful in repeated calls to add().

# Loop forever.  Every five minutes wake up, and add all newly
# committed revisions to the index.
while(1) {
  sleep 300;
  $index->add({ start_rev => $index->get_last_indexed_rev() + 1,
                end_rev   => 'HEAD' });
}

The last indexed revision number is saved as a property of the index.

my $hits = $index->search($query);

Search for $query and returns a KinoSearch::Search::Hits object which contains the result.

QUERY SYNTAX

This module supports the Lucene query syntax, described in detail at http://lucene.apache.org/java/docs/queryparsersyntax.html. A brief overview follows.

  • A query consists of one or more terms, joined with boolean operators.

  • A term is either a single word, or two or more words, enclosed in double quotes. So

    foo bar baz

    is a different query from

    "foo bar" baz

    The first searches for any of foo, bar, or baz, the second searches for any of foo bar, or baz.

  • By default, multiple terms in a query are OR'd together. You may also use AND, or NOT between terms.

    foo AND bar
foo NOT bar

    Use + before a term to indicate that it must appear, and - before a term to indicate that it must not appear.

    foo +bar
-foo bar

  • Use parantheses to control the ordering.

    (foo OR bar) AND baz

  • Searches are conducted in fields. The default field to search is the log message. Other fields are indicated by placing the field name before the term, separating them both with a :.

    Available fields are:

    revision
    author
    date
    paths

    For example, to find all commit messages where nik was the committer, that contained the string "foo bar":

    author:nik AND "foo bar"

DIAGNOSTICS

Any of these methods may fail. If they do, they throw an Exception::Class subclass representing the error, trappable with eval. Uncaught exceptions will cause the client application to die.

SVN::Log::Index::X::Args

Represents an error that occurs if the parameters given to any of the methods are wrong. This might be because there are too few or too many parameters, or that the types of those parameters are wrong.

The text of the error can be retrieved with the error() method.

SVN::Log::Index::X::Fault

Represents any other error.

Example

my $e;
eval { $index->search('query string'); };

if($e = SVN::Log::Index::X::Fault->caught()) {
    print "An error occured: ", $e->string(), "\n";
} elsif ($e = Exception::Class->caught()) {
    # Something else failed, rethrow the error
    ref $e ? $e->rethrow() : die $e;
}

SEE ALSO

SVN::Log, KinoSearch

BUGS

Please report any bugs or feature requests to bug-svn-log-index@rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=SVN-Log-Index. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

AUTHOR

The current maintainer is Nik Clayton, <nikc@cpan.org>.

The original author was Garrett Rooney, <rooneg@electricjellyfish.net>

COPYRIGHT AND LICENSE

Copyright 2006-2007 Nik Clayton. All Rights Reserved.

Copyright 2004 Garrett Rooney. All Rights Reserved.

This software is licensed under the same terms as Perl itself.