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#
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# BuildableProduct.pm
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#
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# Originally Written by Christopher Williams
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#
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# Description
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# -----------
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# a base class to provide dependency checking functionality for any object
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#
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# Interface
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# ---------
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# new() : A new BuildableProduct object
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# update() : update the object if required
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# dependency(BuildableProduct): add a dependency
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# build() : build the object
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# state() : return a string to identify the current
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# state of the object - by default assumed to be a# file
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# stateref() : return the state reference of the object after
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# the last succesful build
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# id([string]) : get/set the id/filename
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package BuildSystem::BuildableProduct;
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require 5.004;
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@ISA=qw(ObjectUtilities::StorableObject);
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sub init {
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my $self=shift;
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$self->{updating}=0;
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}
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#
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# return values 0=no change, 1= sucessful change, 2=update failed
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# 3 = update in progress - recursive stoppoint
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#
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sub update {
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my $self=shift;
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my $rv=0;
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my $rverror=0;
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my @strings=();
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my needupdate=0;
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# -- check were not in a recursive process
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return 3 , if ( $self->{updating} == 1 );
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$self->{updating}=1; # lock updating process
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# -- check self
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if ( $self->stateref() != $self->state() );
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# -- check dependencies
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my $obj, $v;
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for (my $i=0; $i<=$#{$self->{dependencies}}; $i++ ) {
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$obj=$self->{dependencies}[$i];
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# first make sure they are up to date
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$obj->update();
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# are they different from the ones we used to build last time
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if ( $obj->state() != $self->{dependencystate}[$i] ) {
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$needupdate=1;
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}
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}
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# --- build
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if ( $needupdate ) {
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my ($stat,@buildstring)=$self->build();
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if ( ! $stat ) {
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$rv=1;
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# Build Successful - must update dependency stats
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for (my $i=0; $i<=$#{$self->{dependencies}}; $i++ ) {
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$obj=$self->{dependencies}[$i];
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$self->{dependencystate}[$i]=$obj->state();
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}
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}
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else {
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push @strings, @buildstring;
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$rv=2;
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}
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}
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$self->{updating}=0; # unlock updating process
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return $rv, @strings;
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}
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sub dependency {
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my $self=shift;
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my $object=shift;
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push @{$self->{dependencies}}, $object;
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}
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sub stateref {
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my $self=shift;
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@_?$self->{stateref}=shift
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:$self->{stateref};
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}
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sub id {
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my $self=shift;
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@_?$self->{id}=shift
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:$self->{id};
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}
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#
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# By default assumes a file but easy to override for other types
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#
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sub state {
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my $self=shift;
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my $moddate=0;
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# if id is a filename, take its last modification date
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if ( -f $self->id() ) {
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$moddate=(stat($self->id()))[9];
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}
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return $moddate;
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}
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# --------- Persistency Stuff -----------------
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sub store {
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my $self=shift;
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my $location=shift;
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local $fh=$self->openfile(">".$location);
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$self->_storedeps($fh);
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undef $fh;
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}
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sub restore {
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my $self=shift;
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my $location=shift;
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local $fh=$self->openfile("<".$location);
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$self->_restoredeps($fh);
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undef $fh;
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}
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#
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# Store dependency information
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#
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sub _storedeps {
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my $self=shift;
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my $fh=shift;
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print $fh $self->{stateref};
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for (my $i=0; $i<=$#{$self->{dependencies}}; $i++ ) {
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print $fh "DEP=".$self->{dependencies}[$i]->id()."\n";
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print $fh $self->{dependencystat}[$i]."\n";
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}
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}
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sub _restoredeps {
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my $self=shift;
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my $fh=shift;
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my $id;
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$self->{stateref}=<$fh>;
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chomp $self->{stateref};
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while ( ($line=<$fh>)=~/^DEP=/ ) {
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chomp $line;
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($id=$line)=~s/^DEP=//;
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push @$self->{dependencies}, ($self->ActiveStore()->find("BPS",$id));
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push @$self->{dependencystat}, <$fh>;
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}
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chomp @$self->{dependencystat};
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}
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