Reference

SVN::Dump(3pm)

A Perl interface to Subversion dumps

NAME

SVN::Dump - A Perl interface to Subversion dumps

VERSION

version 0.08

SYNOPSIS

    #!/usr/bin/perl
    use strict;
    use warnings;
    use SVN::Dump;
    
    my $file = shift;
    my $dump = SVN::Dump->new( { file => $file } );
    
    # compute some stats
    my %type;
    my %kind;
    while ( my $record = $dump->next_record() ) {
        $type{ $record->type() }++;
        $kind{ $record->get_header('Node-action') }++
            if $record->type() eq 'node';
    }
    
    # print the results
    print "Statistics for dump $file:\n",
          "  version:   ", $dump->version(), "\n",
          "  uuid:      ", $dump->uuid(), "\n",
          "  revisions: ", $type{revision}, "\n",
          "  nodes:     ", $type{node}, "\n";
    print map { sprintf "  - %-7s: %d\n", $_, $kind{$_} } sort keys %kind;

DESCRIPTION

An SVN::Dump object represents a Subversion dump.

This module follow the semantics used in the reference document (the file notes/fs_dumprestore.txt in the Subversion source tree):

•

A dump is a collection of records (SVN::Dump::Record objects).

•

A record is composed of a set of headers (a SVN::Dump::Headers object), a set of properties (a SVN::Dump::Property object) and an optional bloc of text (a SVN::Dump::Text object).

•

Some special records ("delete" records with a "Node-kind" header) recursively contain included records.

Each class has a "as_string()" method that prints its content in the dump format.

The most basic thing you can do with SVN::Dump is simply copy a dump:

    use SVN::Dump;
    my $dump = SVN::Dump->new( { file => 'mydump.svn' } );
    $dump->next_record;          # read the format header
    $dump->next_record;          # read the uuid header
    print $dump->as_string();    # only print the dump header
    while( $rec = $dump->next_record() ) {
        print $rec->as_string();
    }

After the operation, the resulting dump should be identical to the original dump.

METHODS

SVN::Dump provides the following methods:

new( \%args )

Return a new SVN::Dump object.

The argument list is a hash reference.

If the SVN::Dump object will read information from a file, the arguments "file" is used (as usal, "-" means "STDIN"); if the dump is read from a filehandle, "fh" is used.

Extra options will be passed to the SVN::Dump::Reader object that is created.

If the SVN::Dump isn't used to read information, the parameters "version" and "uuid" can be used to initialise the values of the "SVN-fs-dump-format-version" and "UUID" headers.

next_record()

Return the next record read from the dump. This is a SVN::Dump::Record object.

version()
format()

Return the dump format version, if the version record has already been read, or if it was given in the constructor.

uuid()

Return the dump UUID, if there is an UUID record and it has been read, or if it was given in the constructor.

as_string()

Return a string representation of the dump specific blocks (the "format" and "uuid" blocks only).

SEE ALSO

SVN::Dump::Reader, SVN::Dump::Record.

The reference document for Subversion dumpfiles is at: <http://svn.apache.org/repos/asf/subversion/trunk/notes/dump-load-format.txt>

COPYRIGHT

Copyright 2006-2020 Philippe Bruhat (BooK), All Rights Reserved.

LICENSE

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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