Acme-Sort-Sleep
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local/lib/perl5/Module/Build/API.pod view on Meta::CPAN
A hash of key/value pairs that should be merged into the F<META.yml>
file during the C<distmeta> action. Any existing entries with the
same names will be overridden.
The only difference between C<meta_add> and C<meta_merge> is their
behavior on hash-valued and array-valued entries: C<meta_add> will
completely blow away the existing hash or array value, but
C<meta_merge> will merge the supplied data into the existing hash or
array value.
See the L</"MODULE METADATA"> section for details.
=item module_name
[version 0.03]
The C<module_name> is a shortcut for setting default values of
C<dist_name> and C<dist_version_from>, reflecting the fact that the
majority of CPAN distributions are centered around one "main" module.
For instance, if you set C<module_name> to C<Foo::Bar>, then
C<dist_name> will default to C<Foo-Bar> and C<dist_version_from> will
default to C<lib/Foo/Bar.pm>. C<dist_version_from> will in turn be
used to set C<dist_version>.
Setting C<module_name> won't override a C<dist_*> parameter you
specify explicitly.
=item needs_compiler
[version 0.36]
The C<needs_compiler> parameter indicates whether a compiler is required to
build the distribution. The default is false, unless XS files are found or
the C<c_source> parameter is set, in which case it is true. If true,
L<ExtUtils::CBuilder> is automatically added to C<build_requires> if needed.
For a distribution where a compiler is I<optional>, e.g. a dual XS/pure-Perl
distribution, C<needs_compiler> should explicitly be set to a false value.
=item PL_files
[version 0.06]
An optional parameter specifying a set of C<.PL> files in your
distribution. These will be run as Perl scripts prior to processing
the rest of the files in your distribution with the name of the file
they're generating as an argument. They are usually used as templates
for creating other files dynamically, so that a file like
C<lib/Foo/Bar.pm.PL> might create the file C<lib/Foo/Bar.pm>.
The files are specified with the C<.PL> files as hash keys, and the
file(s) they generate as hash values, like so:
my $build = Module::Build->new
(
module_name => 'Foo::Bar',
...
PL_files => { 'lib/Foo/Bar.pm.PL' => 'lib/Foo/Bar.pm' },
);
Note that the path specifications are I<always> given in Unix-like
format, not in the style of the local system.
If your C<.PL> scripts don't create any files, or if they create files
with unexpected names, or even if they create multiple files, you can
indicate that so that Module::Build can properly handle these created
files:
PL_files => {
'lib/Foo/Bar.pm.PL' => 'lib/Foo/Bar.pm',
'lib/something.PL' => ['/lib/something', '/lib/else'],
'lib/funny.PL' => [],
}
Here's an example of a simple PL file.
my $output_file = shift;
open my $fh, ">", $output_file or die "Can't open $output_file: $!";
print $fh <<'END';
#!/usr/bin/perl
print "Hello, world!\n";
END
PL files are not installed by default, so its safe to put them in
F<lib/> and F<bin/>.
=item pm_files
[version 0.19]
An optional parameter specifying the set of C<.pm> files in this
distribution, specified as a hash reference whose keys are the files'
locations in the distributions, and whose values are their logical
locations based on their package name, i.e. where they would be found
in a "normal" Module::Build-style distribution. This parameter is
mainly intended to support alternative layouts of files.
For instance, if you have an old-style C<MakeMaker> distribution for a
module called C<Foo::Bar> and a F<Bar.pm> file at the top level of the
distribution, you could specify your layout in your C<Build.PL> like
this:
my $build = Module::Build->new
(
module_name => 'Foo::Bar',
...
pm_files => { 'Bar.pm' => 'lib/Foo/Bar.pm' },
);
Note that the values should include C<lib/>, because this is where
they would be found in a "normal" Module::Build-style distribution.
Note also that the path specifications are I<always> given in
Unix-like format, not in the style of the local system.
=item pod_files
[version 0.19]
Just like C<pm_files>, but used for specifying the set of C<.pod>
files in your distribution.
=item recommends
[version 0.08]
This is just like the L</requires> argument, except that modules listed
in this section aren't essential, just a good idea. We'll just print
a friendly warning if one of these modules aren't found, but we'll
continue running.
If a module is recommended but not required, all tests should still
pass if the module isn't installed. This may mean that some tests
may be skipped if recommended dependencies aren't present.
Automated tools like CPAN.pm should inform the user when recommended
modules aren't installed, and it should offer to install them if it
wants to be helpful.
See the documentation for L<Module::Build::Authoring/"PREREQUISITES">
for the details of how requirements can be specified.
=item recursive_test_files
[version 0.28]
Normally, C<Module::Build> does not search subdirectories when looking
for tests to run. When this options is set it will search recursively
in all subdirectories of the standard 't' test directory.
=item release_status
[version 0.37]
The CPAN Meta Spec version 2 adds C<release_status> to allow authors
to specify how a distribution should be indexed. Consistent with the
spec, this parameter can only have one three values: 'stable',
'testing' or 'unstable'.
Unless explicitly set by the author, C<release_status> will default
to 'stable' unless C<dist_version> contains an underscore, in which
case it will default to 'testing'.
It is an error to specify a C<release_status> of 'stable' when
C<dist_version> contains an underscore character.
=item requires
[version 0.07]
An optional C<requires> argument specifies any module prerequisites
that the current module depends on.
One note: currently C<Module::Build> doesn't actually I<require> the
local/lib/perl5/Module/Build/API.pod view on Meta::CPAN
When this method is called, a new property will be installed in the
Module::Build class, and an accessor will be built to allow the property to be
get or set on the build object.
print $build->pedantic, $/;
$build->pedantic(0);
If the default value is a hash reference, this generates a special-case
accessor method, wherein individual key/value pairs may be set or fetched:
print "stuff{foo} is: ", $build->stuff( 'foo' ), $/;
$build->stuff( foo => 'bar' );
print $build->stuff( 'foo' ), $/; # Outputs "bar"
Of course, you can still set the entire hash reference at once, as well:
$build->stuff( { foo => 'bar', baz => 'yo' } );
In either case, if a C<check> has been specified for the property, it will be
applied to the entire hash. So the check code reference should look something
like:
check => sub {
return 1 if defined $_ && exists $_->{foo};
shift->property_error(qq{Property "stuff" needs "foo"});
return 0;
},
=item property_error
[version 0.31]
=back
=head2 METHODS
=over 4
=item add_build_element($type)
[version 0.26]
Adds a new type of entry to the build process. Accepts a single
string specifying its type-name. There must also be a method defined
to process things of that type, e.g. if you add a build element called
C<'foo'>, then you must also define a method called
C<process_foo_files()>.
See also
L<Module::Build::Cookbook/"Adding new file types to the build process">.
=item add_to_cleanup(@files)
[version 0.03]
You may call C<< $self->add_to_cleanup(@patterns) >> to tell
C<Module::Build> that certain files should be removed when the user
performs the C<Build clean> action. The arguments to the method are
patterns suitable for passing to Perl's C<glob()> function, specified
in either Unix format or the current machine's native format. It's
usually convenient to use Unix format when you hard-code the filenames
(e.g. in F<Build.PL>) and the native format when the names are
programmatically generated (e.g. in a testing script).
I decided to provide a dynamic method of the C<$build> object, rather
than just use a static list of files named in the F<Build.PL>, because
these static lists can get difficult to manage. I usually prefer to
keep the responsibility for registering temporary files close to the
code that creates them.
=item args()
[version 0.26]
my $args_href = $build->args;
my %args = $build->args;
my $arg_value = $build->args($key);
$build->args($key, $value);
This method is the preferred interface for retrieving the arguments passed via
command line options to F<Build.PL> or F<Build>, minus the Module-Build
specific options.
When called in a scalar context with no arguments, this method returns a
reference to the hash storing all of the arguments; in an array context, it
returns the hash itself. When passed a single argument, it returns the value
stored in the args hash for that option key. When called with two arguments,
the second argument is assigned to the args hash under the key passed as the
first argument.
=item autosplit_file($from, $to)
[version 0.28]
Invokes the L<AutoSplit> module on the C<$from> file, sending the
output to the C<lib/auto> directory inside C<$to>. C<$to> is
typically the C<blib/> directory.
=item base_dir()
[version 0.14]
Returns a string containing the root-level directory of this build,
i.e. where the C<Build.PL> script and the C<lib> directory can be
found. This is usually the same as the current working directory,
because the C<Build> script will C<chdir()> into this directory as
soon as it begins execution.
=item build_requires()
[version 0.21]
Returns a hash reference indicating the C<build_requires>
prerequisites that were passed to the C<new()> method.
=item can_action( $action )
Returns a reference to the method that defines C<$action>, or false
otherwise. This is handy for actions defined (or maybe not!) in subclasses.
[version 0.32_xx]
local/lib/perl5/Module/Build/API.pod view on Meta::CPAN
Perl's C<system()>. It returns true or false to indicate success or
failure (the opposite of how C<system()> works, but more intuitive).
Note that if you supply a single argument to C<do_system()>, it
will/may be processed by the system's shell, and any special
characters will do their special things. If you supply multiple
arguments, no shell will get involved and the command will be executed
directly.
=item extra_compiler_flags()
=item extra_compiler_flags(@flags)
[version 0.25]
Set or retrieve the extra compiler flags. Returns an arrayref of flags.
=item extra_linker_flags()
=item extra_linker_flags(@flags)
[version 0.25]
Set or retrieve the extra linker flags. Returns an arrayref of flags.
=item feature($name)
=item feature($name => $value)
[version 0.26]
With a single argument, returns true if the given feature is set.
With two arguments, sets the given feature to the given boolean value.
In this context, a "feature" is any optional functionality of an
installed module. For instance, if you write a module that could
optionally support a MySQL or PostgreSQL backend, you might create
features called C<mysql_support> and C<postgres_support>, and set them
to true/false depending on whether the user has the proper databases
installed and configured.
Features set in this way using the Module::Build object will be
available for querying during the build/test process and after
installation via the generated C<...::ConfigData> module, as
C<< ...::ConfigData->feature($name) >>.
The C<feature()> and C<config_data()> methods represent
Module::Build's main support for configuration of installed modules.
See also L<Module::Build::Authoring/"SAVING CONFIGURATION INFORMATION">.
=item fix_shebang_line(@files)
[version 0.??]
Modify any "shebang" line in the specified files to use the path to the
perl executable being used for the current build. Files are modified
in-place. The existing shebang line must have a command that contains
"C<perl>"; arguments to the command do not count. In particular, this
means that the use of C<#!/usr/bin/env perl> will not be changed.
For an explanation of shebang lines, see
L<http://en.wikipedia.org/wiki/Shebang_%28Unix%29>.
=item have_c_compiler()
[version 0.21]
Returns true if the current system seems to have a working C compiler.
We currently determine this by attempting to compile a simple C source
file and reporting whether the attempt was successful.
=item install_base_relpaths()
=item install_base_relpaths($type)
=item install_base_relpaths($type => $path)
[version 0.28]
Set or retrieve the relative paths that are appended to
C<install_base> for any installable element. This is useful if you
want to set the relative install path for custom build elements.
With no argument, it returns a reference to a hash containing all
elements and their respective values. This hash should not be modified
directly; use the multiple argument below form to change values.
The single argument form returns the value associated with the
element C<$type>.
The multiple argument form allows you to set the paths for element types.
C<$value> must be a relative path using Unix-like paths. (A series of
directories separated by slashes, e.g. C<foo/bar>.) The return value is a
localized path based on C<$value>.
Assigning the value C<undef> to an element causes it to be removed.
=item install_destination($type)
[version 0.28]
Returns the directory in which items of type C<$type> (e.g. C<lib>,
C<arch>, C<bin>, or anything else returned by the L</install_types()>
method) will be installed during the C<install> action. Any settings
for C<install_path>, C<install_base>, and C<prefix> are taken into
account when determining the return value.
=item install_path()
=item install_path($type)
=item install_path($type => $path)
[version 0.28]
Set or retrieve paths for specific installable elements. This is
useful when you want to examine any explicit install paths specified
by the user on the command line, or if you want to set the install
path for a specific installable element based on another attribute
like C<install_base()>.
With no argument, it returns a reference to a hash containing all
elements and their respective values. This hash should not be modified
directly; use the multiple argument below form to change values.
The single argument form returns the value associated with the
element C<$type>.
The multiple argument form allows you to set the paths for element types.
The supplied C<$path> should be an absolute path to install elements
of C<$type>. The return value is C<$path>.
Assigning the value C<undef> to an element causes it to be removed.
=item install_types()
[version 0.28]
Returns a list of installable types that this build knows about.
These types each correspond to the name of a directory in F<blib/>,
and the list usually includes items such as C<lib>, C<arch>, C<bin>,
C<script>, C<libdoc>, C<bindoc>, and if HTML documentation is to be
built, C<libhtml> and C<binhtml>. Other user-defined types may also
exist.
=item invoked_action()
[version 0.28]
This is the name of the original action invoked by the user. This
value is set when the user invokes F<Build.PL>, the F<Build> script,
or programmatically through the L<dispatch()|/"dispatch($action, %args)">
method. It does not change as sub-actions are executed as
dependencies are evaluated.
To get the name of the currently executing dependency, see
L</current_action()> above.
=item notes()
=item notes($key)
=item notes($key => $value)
[version 0.20]
The C<notes()> value allows you to store your own persistent
information about the build, and to share that information among
different entities involved in the build. See the example in the
C<current()> method.
The C<notes()> method is essentially a glorified hash access. With no
arguments, C<notes()> returns the entire hash of notes. With one argument,
C<notes($key)> returns the value associated with the given key. With two
arguments, C<notes($key, $value)> sets the value associated with the given key
to C<$value> and returns the new value.
The lifetime of the C<notes> data is for "a build" - that is, the
C<notes> hash is created when C<perl Build.PL> is run (or when the
C<new()> method is run, if the Module::Build Perl API is being used
instead of called from a shell), and lasts until C<perl Build.PL> is
run again or the C<clean> action is run.
=item orig_dir()
[version 0.28]
Returns a string containing the working directory that was in effect
before the F<Build> script chdir()-ed into the C<base_dir>. This
might be useful for writing wrapper tools that might need to chdir()
back out.
=item os_type()
[version 0.04]
If you're subclassing Module::Build and some code needs to alter its
behavior based on the current platform, you may only need to know
whether you're running on Windows, Unix, MacOS, VMS, etc., and not the
fine-grained value of Perl's C<$^O> variable. The C<os_type()> method
will return a string like C<Windows>, C<Unix>, C<MacOS>, C<VMS>, or
whatever is appropriate. If you're running on an unknown platform, it
will return C<undef> - there shouldn't be many unknown platforms
though.
=item is_vmsish()
=item is_windowsish()
=item is_unixish()
Convenience functions that return a boolean value indicating whether
this platform behaves respectively like VMS, Windows, or Unix. For
arbitrary reasons other platforms don't get their own such functions,
at least not yet.
=item prefix_relpaths()
=item prefix_relpaths($installdirs)
=item prefix_relpaths($installdirs, $type)
=item prefix_relpaths($installdirs, $type => $path)
[version 0.28]
Set or retrieve the relative paths that are appended to C<prefix> for
any installable element. This is useful if you want to set the
relative install path for custom build elements.
With no argument, it returns a reference to a hash containing all
elements and their respective values as defined by the current
C<installdirs> setting.
With a single argument, it returns a reference to a hash containing
all elements and their respective values as defined by
C<$installdirs>.
The hash returned by the above calls should not be modified directly;
use the three-argument below form to change values.
The two argument form returns the value associated with the
element C<$type>.
The multiple argument form allows you to set the paths for element types.
C<$value> must be a relative path using Unix-like paths. (A series of
directories separated by slashes, e.g. C<foo/bar>.) The return value is a
localized path based on C<$value>.
Assigning the value C<undef> to an element causes it to be removed.
=item get_metadata()
[version 0.36]
This method returns a hash reference of metadata that can be used to create a
YAML datastream. It is provided for authors to override or customize the fields
of F<META.yml>. E.g.
package My::Builder;
use base 'Module::Build';
sub get_metadata {
my $self, @args = @_;
my $data = $self->SUPER::get_metadata(@args);
$data->{custom_field} = 'foo';
return $data;
}
Valid arguments include:
=over
=item *
C<fatal> -- indicates whether missing required
metadata fields should be a fatal error or not. For META creation, it
generally should, but for MYMETA creation for end-users, it should not be
fatal.
=item *
C<auto> -- indicates whether any necessary configure_requires should be
automatically added. This is used in META creation.
=back
This method is a wrapper around the old prepare_metadata API now that we
no longer use YAML::Node to hold metadata.
=item prepare_metadata() [deprecated]
[version 0.36]
[Deprecated] As of 0.36, authors should use C<get_metadata> instead. This
method is preserved for backwards compatibility only.
It takes three positional arguments: a hashref (to which metadata will be
added), an optional arrayref (to which metadata keys will be added in order if
the arrayref exists), and a hashref of arguments (as provided to get_metadata).
The latter argument is new as of 0.36. Earlier versions are always fatal on
errors.
Prior to version 0.36, this method took a YAML::Node as an argument to hold
assembled metadata.
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