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Top Forums Shell Programming and Scripting Copying a directory structure with the latest versions of files Post 302351377 by Glyn_Mo on Tuesday 8th of September 2009 10:57:45 AM
Old 09-08-2009
Copying a directory structure with the latest versions of files


I have three directory structures for code releases.

Each directory structure looks like this:

bash-3.00$ ls -R | more








What I'm wanting to do is, is to create a composite directory called "Test_Releases_1-3" which will have the same structure (with a dbcode directory), but will only copy scripts with the highest version number into the dbcode folder of the new composite directory "Test_Releases_1-3". In the new composite release structure I only want to get the very latest versions of scripts. The code release directories often contain multiple versions of the same package.

I'm needing to write a script which will create the composite release directory automatically, only extracting the latest version of packages from the original release directories.

Hope that made some sort of sense.

Thanks in advance
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composite(3pm)						User Contributed Perl Documentation					    composite(3pm)

Tk::composite - Defining a new composite widget class SYNOPSIS
package Tk::MyNewWidget; use Tk:widgets qw/ list of Tk widgets /; use base qw/ Tk::Frame /; # or Tk::Toplevel Construct Tk::Widget 'MyNewWidget'; sub ClassInit { my( $class, $mw ) = @_; #... e.g., class bindings here ... $class->SUPER::ClassInit( $mw ); } sub Populate { my( $self, $args ) = @_; my $flag = delete $args->{-flag}; if( defined $flag ) { # handle -flag => xxx which can only be done at create # time the delete above ensures that new() does not try # and do $self->configure( -flag => xxx ); } $self->SUPER::Populate( $args ); $self = $self->Component( ... ); $self->Delegates( ... ); $self->ConfigSpecs( '-cursor' => [ SELF, 'cursor', 'Cursor', undef ], '-something' => [ METHOD, dbName, dbClass, default ], '-text' => [ $label, dbName, dbClass, default ], '-heading' => [ {-text => $head}, heading, Heading, 'My Heading' ], ); } sub something { my( $self, $value) = @_; if ( @_ > 1 ) { # set it } return # current value } 1; __END__ =head1 NAME Tk::Whatever - a whatever widget =head1 SYNOPSIS use Tk::Whatever; $widget = $parent->Whatever(...); =head1 DESCRIPTION ... DESCRIPTION
The intention behind a composite is to create a higher-level widget, sometimes called a "super-widget" or "mega-widget". Most often, a composite will be built upon other widgets by using them, as opposed to specializing on them. For example, the supplied composite widget LabEntry is made of an Entry and a Label; it is neither a kind-of Label nor is it a kind-of Entry. Most of the work of a composite widget consistd in creating subwidgets, arranging to dispatch configure options to the proper subwidgets and manage composite-specific configure options. GLORY DETAILS
Depending on your Perl/Tk knowledge this section may be enlighting or confusing. Composite Widget Since Perl/Tk is heavilly using an object-oriented approach, it is no suprise that creating a composite goes through a new() method. However, the composite does not normally define a new() method itself: it is usually sufficient to simply inherit it from Tk::Widget. This is what happens when the composite uses use base qw/ Tk::Frame /; # or Tk::Toplevel to specify its inheritance chain. To complete the initialisation of the widget, it must call the Construct method from class Widget. That method accepts the name of the new class to create, i.e. the package name of your composite widget: Construct Tk::Widget 'MyNewWidget'; Here, MyNewWidget is the package name (aka the widget's class). This will define a constructor method for MyNewWidget, normally named after the widget's class. Instanciating that composite in client code would the look like: $mw = MainWindow->new; # creates a top-level MainWindow $self = $mw->MyNewWidget(); # creates an instance of the # composite widget MyNewWidget Whenever a composite is instanciated in client code, "Tk::Widget::new()" will be invoked via the widget's class constructor. That new method will call $self->Populate(\%args); where %args is the arguments passed to the widget's constructor. Note that Populate receives a reference to the hash array containing all arguments. Populate is typically defined in the composite class (package), which creates the characteristic subwidgets of the class. Creating Subwidgets Subwidget creation happens usually in Populate(). The composite usually calls the subwidget's constructor method either directly, for "private" subwidgets, or indirectly through the Component method for subwidgets that should be advertised to clients. Populate may call Delegates to direct calls to methods of chosen subwidgets. For simple composites, typically most if not all methods are directed to a single subwidget - e.g. ScrListbox directs all methods to the core Listbox so that $composite->get(...) calls $listbox->get(...). Defining mega-widget options Populate should also call ConfigSpecs() to specify the way that configure-like options should be handled in the composite. Once Populate returns, method Tk::Frame::ConfigDefault walks through the ConfigSpecs entries and populates %$args hash with defaults for options from X resources (.Xdefaults, etc). When Populate returns to Tk::Widget::new(), a call to $self->configure(%$args) is made which sets *all* the options. SEE ALSO
Tk::ConfigSpecs Tk::mega Tk::Derived perl v5.14.2 2010-05-29 composite(3pm)

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