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ExtUtils::Installed(3pm)              Perl Programmers Reference Guide              ExtUtils::Installed(3pm)



NAME
       ExtUtils::Installed - Inventory management of installed modules

SYNOPSIS
          use ExtUtils::Installed;
          my ($inst) = ExtUtils::Installed->new( skip_cwd => 1 );
          my (@modules) = $inst->modules();
          my (@missing) = $inst->validate("DBI");
          my $all_files = $inst->files("DBI");
          my $files_below_usr_local = $inst->files("DBI", "all", "/usr/local");
          my $all_dirs = $inst->directories("DBI");
          my $dirs_below_usr_local = $inst->directory_tree("DBI", "prog");
          my $packlist = $inst->packlist("DBI");

DESCRIPTION
       ExtUtils::Installed  provides a standard way to find out what core and module files have been
       installed.  It uses the information stored in .packlist files created during installation to provide
       this information.  In addition it provides facilities to classify the installed files and to extract
       directory information from the .packlist files.

USAGE
       The new() function searches for all the installed .packlists on the system, and stores their
       contents. The .packlists can be queried with the functions described below. Where it searches by
       default is determined by the settings found in %Config::Config, and what the value is of the PERL5LIB
       environment variable.

METHODS
       Unless specified otherwise all method can be called as class methods, or as object methods. If called
       as class methods then the "default" object will be used, and if necessary created using the current
       processes %Config and @INC.  See the 'default' option to new() for details.

       new()
           This takes optional named parameters. Without parameters, this searches for all the installed
           .packlists on the system using information from %Config::Config and the default module search
           paths @INC. The packlists are read using the ExtUtils::Packlist module.

           If the named parameter "skip_cwd" is true, the current directory "." will be stripped from @INC
           before searching for .packlists.  This keeps ExtUtils::Installed from finding modules installed
           in other perls that happen to be located below the current directory.

           If the named parameter "config_override" is specified, it should be a reference to a hash which
           contains all information usually found in %Config::Config. For example, you can obtain the
           configuration information for a separate perl installation and pass that in.

               my $yoda_cfg  = get_fake_config('yoda');
               my $yoda_inst =
                          ExtUtils::Installed->new(config_override=>$yoda_cfg);

           Similarly, the parameter "inc_override" may be a reference to an array which is used in place of
           the default module search paths from @INC.

               use Config;
               my @dirs = split(/\Q$Config{path_sep}\E/, $ENV{PERL5LIB});
               my $p5libs = ExtUtils::Installed->new(inc_override=>\@dirs);

           Note: You probably do not want to use these options alone, almost always you will want to set
           both together.

           The parameter "extra_libs" can be used to specify additional paths to search for installed
           modules. For instance

               my $installed =
                        ExtUtils::Installed->new(extra_libs=>["/my/lib/path"]);

           This should only be necessary if "/my/lib/path" is not in PERL5LIB.

           Finally there is the 'default', and the related 'default_get' and 'default_set' options. These
           options control the "default" object which is provided by the class interface to the methods.
           Setting "default_get" to true tells the constructor to return the default object if it is
           defined. Setting "default_set" to true tells the constructor to make the default object the
           constructed object. Setting the "default" option is like setting both to true. This is used
           primarily internally and probably isn't interesting to any real user.

       modules()
           This returns a list of the names of all the installed modules.  The perl 'core' is given the
           special name 'Perl'.

       files()
           This takes one mandatory parameter, the name of a module.  It returns a list of all the filenames
           from the package.  To obtain a list of core perl files, use the module name 'Perl'.  Additional
           parameters are allowed.  The first is one of the strings "prog", "doc" or "all", to select either
           just program files, just manual files or all files.  The remaining parameters are a list of
           directories. The filenames returned will be restricted to those under the specified directories.

       directories()
           This takes one mandatory parameter, the name of a module.  It returns a list of all the
           directories from the package.  Additional parameters are allowed.  The first is one of the
           strings "prog", "doc" or "all", to select either just program directories, just manual
           directories or all directories.  The remaining parameters are a list of directories. The
           directories returned will be restricted to those under the specified directories.  This method
           returns only the leaf directories that contain files from the specified module.

       directory_tree()
           This is identical in operation to directories(), except that it includes all the intermediate
           directories back up to the specified directories.

       validate()
           This takes one mandatory parameter, the name of a module.  It checks that all the files listed in
           the modules .packlist actually exist, and returns a list of any missing files.  If an optional
           second argument which evaluates to true is given any missing files will be removed from the
           .packlist

       packlist()
           This returns the ExtUtils::Packlist object for the specified module.

       version()
           This returns the version number for the specified module.

EXAMPLE
       See the example in ExtUtils::Packlist.

AUTHOR
       Alan Burlison <Alan.Burlison@uk.sun.com>



perl v5.16.2                                     2012-10-11                         ExtUtils::Installed(3pm)