ExtUtils::Installed(3pmPerl Programmers Reference GuidExtUtils::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 AT uk.com>
perl v5.16.3 2013-03-04 ExtUtils::Installed(3pm)
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