Implementing Composite Commands

Implementing Pseudo-programs

To indicate that a package wraps disparate programs under a single pseudo program, use an asterisk before the program name:

 package Bio::Tools::Run::YourPkg::Config;
 ...
 our $program_name = '*blast+';

and "_run" will know what to do. Specify the rest of the globals as if the desired programs were commands. Use the basename of the programs for the command names.

If all the programs can be found in a single directory, just specify that directory in "program_dir()". If not, use "executables()" to set the paths to each program explicitly:

 foreach (keys %cmdpaths) {
    $self->executables($_, $cmdpaths{$_});
 }

Config Globals

Here is an example config file. Further details in prose are below.

 package Dummy::Config;
 use strict;
 use warnings;
 no warnings qw(qw);
 use Exporter;
 our (@ISA, @EXPORT, @EXPORT_OK);
 push @ISA, 'Exporter';
 @EXPORT = qw(
              $program_name
              $program_dir
              $use_dash
              $join
              @program_commands
              %command_prefixes
              @program_params
              @program_switches
              %param_translation
              %command_files
              %composite_commands
             );
 our $program_name = '*flurb';
 our $program_dir = 'C:\cygwin\usr\local\bin';
 our $use_dash = 'mixed';
 our $join = ' ';
 our @program_commands = qw(
  rpsblast
  find
  goob
  blorb
  multiglob
   );
 our %command_prefixes = (
     blastp => 'blp',
     tblastn => 'tbn',
     goob => 'g',
     blorb => 'b',
     multiglob => 'm'
     );
 our @program_params = qw(
     command
     g|narf
     g|schlurb
     b|scroob
     b|frelb
     m|trud
 );
 our @program_switches = qw(
     g|freen
     b|klep
 );
 our %param_translation = (
     'g|narf'     => 'n',
     'g|schlurb'  => 'schlurb',
     'g|freen'    => 'f',
     'b|scroob'   => 's',
     'b|frelb'    => 'frelb'
     );
 our %command_files = (
     'goob'       => [qw( fas faq )],
     );
 our %composite_commands = (
     'multiglob' => [qw( blorb goob )]
     );
 1;

$use_dash can be one of "single", "double", or "mixed". See Bio::Tools::Run::WrapperBase.

There is a syntax for the %command_files specification. The token matching "[a-zA-Z0-9_]+" in each element of each arrayref becomes the named filespec parameter for the "_run()" method in the wrapper class. Additional symbols surrounding this token indicate how this argument should be handled. Some examples:

 >out  : stdout is redirected into the file
         specified by (..., -out => $file,... )
 <in   : stdin is accepted from the file
         specified by (..., -in => $file,... )
 2>log : stderr is redirected into the file
         specified by (..., -log => $file,... )
 #opt  : this filespec argument is optional
         (no throw if -opt => $option is missing)
 2>#log: if -log is not specified in the arguments, the stderr()
         method will capture stderr
 *lst  : this filespec can take multiple arguments,
         specify using an arrayref (..., -lst => [$file1, $file2], ...)
 *#lst : an optional list

The tokens above are examples; they can be anything matching the above regexp.

Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to the Bioperl mailing list. Your participation is much appreciated.

  bioperl-l@bioperl.org                  - General discussion
http://bioperl.org/wiki/Mailing_lists  - About the mailing lists

Support

Please direct usage questions or support issues to the mailing list:

bioperl-l@bioperl.org

rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address it. Please include a thorough description of the problem with code and data examples if at all possible.

Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their resolution. Bug reports can be submitted via the web:

  https://github.com/bioperl/bioperl-live/issues

new()

 Title   : new
 Usage   :
 Function: constructor for WrapperBase::CommandExts ;
           correctly binds configuration variables
           to the WrapperBase object
 Returns : Bio::Tools::Run::WrapperBase object with command extensions
 Args    :
 Note    : this method subsumes the old _register_program_commands and
           _set_program_options, leaving out the assembler-specific
           parms ($qual_param and out_type())

program_name

 Title   : program_name
 Usage   : $factory->program_name($name)
 Function: get/set the executable name
 Returns:  string
 Args    : string

program_dir

 Title   : program_dir
 Usage   : $factory->program_dir($dir)
 Function: get/set the program dir
 Returns:  string
 Args    : string

_register_program_commands()

 Title   : _register_program_commands
 Usage   : $factory->_register_program_commands( \@commands, \%prefixes )
 Function: Register the commands a program accepts (for programs that act
           as frontends for a set of commands, each command having its own
           set of params/switches)
 Returns : true on success
 Args    : arrayref to a list of commands (scalar strings),
           hashref to a translation table of the form
           { $prefix1 => $command1, ... } [optional]
 Note    : To implement a program with this kind of calling structure,
           include a parameter called 'command' in the
           @program_params global
 Note    : The translation table is used to associate parameters and
           switches specified in _set_program_options with the correct
           program command. In the globals @program_params and
           @program_switches, specify elements as 'prefix1|param' and
           'prefix1|switch', etc.

_set_program_options

 Title   : _set_program_options
 Usage   : $factory->_set_program_options( \@ args );
 Function: Register the parameters and flags that an assembler takes.
 Returns : 1 for success
 Args    : - arguments passed by the user
           - parameters that the program accepts, optional (default: none)
           - switches that the program accepts, optional (default: none)
           - parameter translation, optional (default: no translation occurs)
           - dash option for the program parameters, [1|single|double|mixed],
             optional (default: yes, use single dashes only)
           - join, optional (default: ' ')

_translate_params

 Title   : _translate_params
 Usage   : @options = @{$assembler->_translate_params( )};
 Function: Translate the Bioperl arguments into the arguments to pass to the
           program on the command line
 Returns : Arrayref of arguments
 Args    : none

executable()

 Title   : executable
 Usage   :
 Function: find the full path to the main executable,
           or to the command executable for pseudo-programs
 Returns : full path, if found
 Args    : [optional] explicit path to the executable
           (will set the appropriate command exec if
            applicable)
           [optional] boolean flag whether or not to warn when exe no found
 Note    : overrides WrapperBase.pm

executables()

 Title   : executables
 Usage   :
 Function: find the full path to a command's executable
 Returns : full path (scalar string)
 Args    : command (scalar string),
           [optional] explicit path to this command exe
           [optional] boolean flag whether or not to warn when exe no found

_find_executable()

 Title   : _find_executable
 Usage   : my $exe_path = $fac->_find_executable($exe, $warn);
 Function: find the full path to a named executable,
 Returns : full path, if found
 Args    : name of executable to find
           [optional] boolean flag whether or not to warn when exe no found
 Note    : differs from executable and executables in not
           setting any object attributes

_register_composite_commands()

 Title   : _register_composite_commands
 Usage   :
 Function: adds subcomand params and switches for composite commands
 Returns : true on success
 Args    : \%composite_commands,
           \@program_params,
           \@program_switches

_create_factory_set()

 Title   : _create_factory_set
 Usage   : @facs = $self->_create_factory_set
 Function: instantiate a set of individual command factories for
           a given composite command
           Factories will have the correct parameter fields set for
           their own subcommand
 Returns : hash of factories: ( $subcmd_prefix => $subcmd_factory, ... )
 Args    : none

_collate_subcmd_args()

 Title   : _collate_subcmd_args
 Usage   : $args_hash = $self->_collate_subcmd_args
 Function: collate parameters and switches into command-specific
           arg lists for passing to new()
 Returns : hash of named argument lists
 Args    : [optional] composite cmd prefix (scalar string)
           [default is 'run']

_run

 Title   : _run
 Usage   : $fac->_run( @file_args )
 Function: Run a command as specified during object construction
 Returns : true on success
 Args    : a specification of the files to operate on according
           to the filespec

no_throw_on_crash()

 Title   : no_throw_on_crash
 Usage   :
 Function: prevent throw on execution error
 Returns :
 Args    : [optional] boolean

last_execution()

 Title   : last_execution
 Usage   :
 Function: return the last executed command with options
 Returns : string of command line sent to IPC::Run
 Args    :

_dash_switch()

 Title   : _dash_switch
 Usage   : $version = $fac->_dash_switch( $switch )
 Function: Returns an appropriately dashed switch for the executable
 Args    : A string containing a switch without dashes
 Returns : string containing an appropriately dashed switch for the current executable

stdout()

 Title   : stdout
 Usage   : $fac->stdout()
 Function: store the output from STDOUT for the run,
           if no file specified in _run arguments
 Example :
 Returns : scalar string
 Args    : on set, new value (a scalar or undef, optional)

stderr()

 Title   : stderr
 Usage   : $fac->stderr()
 Function: store the output from STDERR for the run,
           if no file is specified in _run arguments
 Example :
 Returns : scalar string
 Args    : on set, new value (a scalar or undef, optional)

is_pseudo()

 Title   : is_pseudo
 Usage   : $obj->is_pseudo($newval)
 Function: returns true if this factory represents
           a pseudo-program
 Example :
 Returns : value of is_pseudo (boolean)
 Args    : on set, new value (a scalar or undef, optional)

AUTOLOAD

AUTOLOAD permits

 $class->new_yourcommand(@args);

as an alias for

 $class->new( -command => 'yourcommand', @args );

set_parameters()

 Title   : set_parameters
 Usage   : $pobj->set_parameters(%params);
 Function: sets the parameters listed in the hash or array
 Returns : true on success
 Args    : [optional] hash or array of parameter/values.

reset_parameters()

 Title   : reset_parameters
 Usage   : resets values
 Function: resets parameters to either undef or value in passed hash
 Returns : none
 Args    : [optional] hash of parameter-value pairs

parameters_changed()

 Title   : parameters_changed
 Usage   : if ($pobj->parameters_changed) {...}
 Function: Returns boolean true (1) if parameters have changed
 Returns : Boolean (0 or 1)
 Args    : [optional] Boolean

available_parameters()

 Title   : available_parameters
 Usage   : @params = $pobj->available_parameters()
 Function: Returns a list of the available parameters
 Returns : Array of parameters
 Args    : 'params' for settable program parameters
           'switches' for boolean program switches
           default: all

get_parameters()

 Title   : get_parameters
 Usage   : %params = $pobj->get_parameters;
 Function: Returns list of key-value pairs of parameter => value
 Returns : List of key-value pairs
 Args    : [optional] A string is allowed if subsets are wanted or (if a
           parameter subset is default) 'all' to return all parameters