package VCP::Source ; =head1 NAME VCP::Source - A base class for repository sources =head1 SYNOPSIS =head1 DESCRIPTION =head1 OPTIONS =over =item --bootstrap --bootstrap=pattern Forces all files matching the given shell regular expression (may use wildcards like "*", "?", and "...") to have their first revisions transferred as complete copies instead of deltas. This is useful when you want to transfer a revision other than the first revision as the first revision in the target repository. It is also useful when you want to skip some revisions in the target repository (although the L has superceded this use). =item --continue Tells VCP to continue where it left off from last time. This will not detect new branches of already transferred revisions (this limitation should be lifted, but results in an expensive rescan of metadata), but will detect updates to already transferred revisions. =back =cut $VERSION = 0.1 ; use strict ; use UNIVERSAL qw( isa ) ; use VCP::Debug qw( :debug ) ; use VCP::Logger qw( lg BUG ); use base 'VCP::Driver' ; use fields ( 'BOOTSTRAP', ## The raw option so we can regurgitate it 'BOOTSTRAP_REGEXPS', ## Determines what files are in bootstrap mode. 'DEST', 'CONTINUE', ## Set if we're resuming from the prior ## copy operation, if there is one. This causes ## us to determine a minimum rev by asking the ## destination what it's seen on a given filebranch 'SENT_REV_COUNT', ## Number of revs sent ## Turns out that most real repositories (ie not RevML, at least) ## are most easily scanned in reverse chronological order. Keeping ## the last revision or the last revision by filebranch is handy in ## these cases. 'LAST_REV', ## The rev that was last sent 'LAST_REV_BY_FILEBRANCH', ## The last sent 'SEEN_IDS', ## IDs of those revisions set already. ) ; sub init { my VCP::Source $self = shift; $self->bootstrap( $self->{BOOTSTRAP} ); $self->{SENT_REV_COUNT} = 0; } ############################################################################### =head1 SUBCLASSING This class uses the fields pragma, so you'll need to use base and possibly fields in any subclasses. See L for methods often needed in subclasses. =head2 Subclass utility API =over =item options_spec Adds common VCP::Source options to whatever options VCP::Plugin parses: =cut sub options_spec { my VCP::Source $self = shift; return ( $self->SUPER::options_spec, "bootstrap|b=s" => \$self->{BOOTSTRAP}, "continue" => \$self->{CONTINUE}, ); } =item dest Sets/Gets a reference to the VCP::Dest object. The source uses this to call handle_header(), handle_rev(), and handle_end() methods. =cut sub dest { my VCP::Source $self = shift ; $self->{DEST} = shift if @_ ; return $self->{DEST} ; } =item continue Sets/Gets the CONTINUE field (which the user sets via the --continue flag) =cut sub continue { my VCP::Source $self = shift ; $self->{CONTINUE} = shift if @_ ; return $self->{CONTINUE} ; } =item send_rev $self->send_rev( $r ); As the revisions are scanned, the source sends them downstream to the dest using this method. Sources should not retain references to revisions, they should copy them if needed, or better yet, copy *just* the required metadata as it is needed. This is a requirement so that filters may alter the revisions without affecting the source's logic. This updates last_rev and last_rev_for_filebranch. =cut sub send_rev { my VCP::Source $self = shift ; my ( $r ) = @_; $r->set_source( $self ); ++$self->{SENT_REV_COUNT}; $self->{LAST_REV} = $r; $self->{LAST_REV_BY_FILEBRANCH}->{$r->source_filebranch_id} = $r; $self->{SEEN_IDS}->{$r->id} = undef; $self->dest->handle_rev( $r ) if $self->dest; } =item queue_rev Some revs can't be sent immediately. They get queued. This updates last_rev and last_rev_for_filebranch. =cut sub queue_rev { my VCP::Source $self = shift ; my ( $r ) = @_; $self->{LAST_REV} = $r; $self->{LAST_REV_BY_FILEBRANCH}->{$r->source_filebranch_id} = $r; $self->{SEEN_IDS}->{$r->id} = undef; $self->revs->add( $r ); } =item queued_rev $self->queued_rev( $id ); Returns a queued rev by id. Sources where revs can arrive willy-nilly, like VCP::Source::revml, queue up all revs and need to randomly access them. =cut sub queued_rev { my VCP::Source $self = shift ; return $self->revs->get( @_ ); } =item last_rev Returns the last revision sent or queued. =cut sub last_rev { my VCP::Source $self = shift ; my ( $r ) = @_; return $self->{LAST_REV}; } =item queued_revs Returns a list of all queued revs. Does not remove them from the queue. =cut sub queued_revs { my VCP::Source $self = shift; return $self->revs->get; } =item last_rev_for_filebranch $self->last_rev_for_filebranch( $filebranch_id ); Returns the last revision sent or queued on the indicated filebranch. =cut sub last_rev_for_filebranch { my VCP::Source $self = shift ; my ( $filebranch_id ) = @_; return $self->{LAST_REV_BY_FILEBRANCH}->{$filebranch_id}; } =item set_last_rev_in_filebranch_previous_id $self->set_last_rev_in_filebranch_previous_id( $r ); If there is a last_rev_for_filebranch for $r->filebranch_id, sets its previous_id to point to $r. This is useful for sources which scan in most-recent-first order. =cut sub set_last_rev_in_filebranch_previous_id { my VCP::Source $self = shift ; my ( $r ) = @_; my $child_rev = $self->last_rev_for_filebranch( $r->source_filebranch_id ); $child_rev->previous_id( $r->id ) if $child_rev; } =item last_revs_for_all_filebranches $self->last_revs_for_all_filebranches; Returns the last revision sent or queued on every filebranch =cut sub last_revs_for_all_filebranches { my VCP::Source $self = shift ; return values %{$self->{LAST_REV_BY_FILEBRANCH}}; } =item id_seen $self->id_seen( $id ); Returns true if the indicated id was sent or queued. =cut sub id_seen { my VCP::Source $self = shift; my ( $id ) = @_; return exists $self->{SEEN_IDS}->{$id}; } =item sent_rev_count Returns (does not set) the number of revs sent so far. =cut sub sent_rev_count { my VCP::Source $self = shift; return $self->{SENT_REV_COUNT}; } =item send_revs $self->send_revs; Removes and sends all revs accumulated so far. =cut sub send_revs { my VCP::Source $self = shift ; my ( $revs ) = @_; $revs ||= $self->revs->remove_all; ## Oddly, we can't show the progress bar here because filters in the ## chain may accumulate revisions and sort them, so this is not a good ## metric. for my $i ( 0..$#$revs ) { $self->send_rev( $revs->[$i] ); $revs->[$i] = undef; } } =back =head1 SUBCLASS OVERLOADS These methods should be overridded in any subclasses. =over =cut sub copy_revs { ## TODO: delete this (DEPRECATED) my VCP::Source $self = shift ; my ( $revs ) = @_; $self->send_revs; } =item get_source_file All sources must provide a way for the destination to fetch a revision. =cut sub get_source_file { my VCP::Source $self = shift; die $self, " does not overload get_source_file()\n"; } =item handle_header REQUIRED OVERLOAD. Subclasses must add all repository-specific info to the $header, at least including rep_type and rep_desc. $header->{rep_type} => 'p4', $self->p4( ['info'], \$header->{rep_desc} ) ; The subclass must pass the $header on to the dest: $self->dest->handle_header( $header ) ; =cut sub handle_header { my VCP::Source $self = shift ; # my ( $header ) = @_ ; BUG "ERROR: copy not overloaded by class '", ref $self, "'. Oops.\n"; # if $self->can( 'handle_header' ) eq \&handle_header ; # $self->dest->handle_header( $header ) ; } =item handle_footer Not a required overload, as the footer carries no useful information at this time. Overriding methods must call this method to pass the $footer on: $self->SUPER::handle_footer( $footer ) ; =cut sub handle_footer { my VCP::Source $self = shift ; my ( $footer ) = @_ ; $self->dest->handle_footer( $footer ) ; } =item parse_time $time = $self->parse_time( $timestr ) ; Parses "[cc]YY/MM/DD[ HH[:MM[:SS]]]". Will add ability to use format strings in future. HH, MM, and SS are assumed to be 0 if not present. Returns a time suitable for feeding to localtime or gmtime. Assumes local system time, so no good for parsing times in revml, but that's not a common thing to need to do, so it's in VCP::Source::revml.pm. =cut { ## This routine is slow and gets called a *lot* with duplicate ## inputs, at least by VCP::Source::cvs, so we memoize it. my %cache; sub parse_time { my VCP::Source $self = shift ; my ( $timestr ) = @_ ; return $cache{$timestr} ||= do { ## TODO: Get parser context here & give file, line, and column. ## filename and rev too, while we're scheduling more work for ## the future. BUG "Malformed time value $timestr\n" unless $timestr =~ /^(\d\d)?\d?\d(\D\d?\d){2,5}/ ; my @f = split( /\D/, $timestr ) ; if ( length $f[0] <= 2 && $f[0] <= 12 && ( length $f[2] == 4 || $f[2] > 12 || "0" eq substr( $f[2], 0, 1 ) ) ) { ## Must be MM/DD/YY, or MM/DD/YYYY. timelocal() needs ## YY(YY)?/MM/DD splice @f, 0, 3, ( $f[2], $f[0], $f[1] ); } --$f[1] ; # Month of year needs to be 0..11 push @f, ( 0 ) x ( 6 - @f ) ; require Time::Local; my $t = eval { Time::Local::timelocal( reverse @f ) }; BUG $@ unless defined $t; return $t; } } } =item bootstrap Sets (and parses) or gets the bootstrap spec. Can be called plain: $self->bootstrap( $bootstrap_spec ) ; See the command line documentation for the format of $bootstrap_spec. =cut sub bootstrap { my VCP::Source $self = shift ; if ( @_ ) { my ( $val ) = @_ ; $self->{BOOTSTRAP} = $val; $self->{BOOTSTRAP_REGEXPS} = [ defined $val ? map $self->compile_path_re( $_ ), split /,+/, $val : () ]; } return $self->{BOOTSTRAP}; } =item is_bootstrap_mode ... if $self->is_bootstrap_mode( $file ) ; Compares the filename passed in against the list of bootstrap regular expressions set by L. The file should be in a format similar to the command line spec for whatever repository is passed in, and not relative to rev_root, so "//depot/foo/bar" for p4, or "module/foo/bar" for cvs. This is typically called in the subbase class only after looking at the revision number to see if it is a first revision (in which case the subclass should automatically put it in bootstrap mode). =cut sub is_bootstrap_mode { my VCP::Source $self = shift ; my ( $file ) = @_ ; my $result = grep $file =~ $_, @{$self->{BOOTSTRAP_REGEXPS}} ; lg( "$file ", ( $result ? "=~ " : "!~ " ), "[ ", join( ', ', map "qr/$_/", @{$self->{BOOTSTRAP_REGEXPS}} ), " ] (", ( $result ? "not in " : "in " ), "bootstrap mode)" ) if debugging; return $result ; } =back =head1 COPYRIGHT Copyright 2000, Perforce Software, Inc. All Rights Reserved. This module and the VCP package are licensed according to the terms given in the file LICENSE accompanying this distribution, a copy of which is included in L. =head1 AUTHOR Barrie Slaymaker =cut 1