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.\" ========================================================================
.\"
.IX Title "Module::Build 3"
.TH Module::Build 3 "2019-08-02" "perl v5.10.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Module::Build \- Build and install Perl modules
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
Standard process for building & installing modules:
.PP
.Vb 4
\& perl Build.PL
\& ./Build
\& ./Build test
\& ./Build install
.Ve
.PP
Or, if you're on a platform (like \s-1DOS\s0 or Windows) that doesn't require
the \*(L"./\*(R" notation, you can do this:
.PP
.Vb 4
\& perl Build.PL
\& Build
\& Build test
\& Build install
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`Module::Build\*(C'\fR is a system for building, testing, and installing
Perl modules. It is meant to be an alternative to
\&\f(CW\*(C`ExtUtils::MakeMaker\*(C'\fR. Developers may alter the behavior of the
module through subclassing. It also does not require a \f(CW\*(C`make\*(C'\fR on your
system \- most of the \f(CW\*(C`Module::Build\*(C'\fR code is pure-perl and written in a
very cross-platform way.
.PP
See \*(L"\s-1COMPARISON\s0\*(R" for more comparisons between \f(CW\*(C`Module::Build\*(C'\fR and
other installer tools.
.PP
To install \f(CW\*(C`Module::Build\*(C'\fR, and any other module that uses
\&\f(CW\*(C`Module::Build\*(C'\fR for its installation process, do the following:
.PP
.Vb 4
\& perl Build.PL # \*(AqBuild.PL\*(Aq script creates the \*(AqBuild\*(Aq script
\& ./Build # Need ./ to ensure we\*(Aqre using this "Build" script
\& ./Build test # and not another one that happens to be in the PATH
\& ./Build install
.Ve
.PP
This illustrates initial configuration and the running of three
\&'actions'. In this case the actions run are 'build' (the default
action), 'test', and 'install'. Other actions defined so far include:
.PP
.Vb 10
\& build manifest
\& clean manifest_skip
\& code manpages
\& config_data pardist
\& diff ppd
\& dist ppmdist
\& distcheck prereq_data
\& distclean prereq_report
\& distdir pure_install
\& distinstall realclean
\& distmeta retest
\& distsign skipcheck
\& disttest test
\& docs testall
\& fakeinstall testcover
\& help testdb
\& html testpod
\& install testpodcoverage
\& installdeps versioninstall
.Ve
.PP
You can run the 'help' action for a complete list of actions.
.SH "GUIDE TO DOCUMENTATION"
.IX Header "GUIDE TO DOCUMENTATION"
The documentation for \f(CW\*(C`Module::Build\*(C'\fR is broken up into sections:
.IP "General Usage (Module::Build)" 4
.IX Item "General Usage (Module::Build)"
This is the document you are currently reading. It describes basic
usage and background information. Its main purpose is to assist the
user who wants to learn how to invoke and control \f(CW\*(C`Module::Build\*(C'\fR
scripts at the command line.
.IP "Authoring Reference (Module::Build::Authoring)" 4
.IX Item "Authoring Reference (Module::Build::Authoring)"
This document describes the structure and organization of
\&\f(CW\*(C`Module::Build\*(C'\fR, and the relevant concepts needed by authors who are
writing \fIBuild.PL\fR scripts for a distribution or controlling
\&\f(CW\*(C`Module::Build\*(C'\fR processes programmatically.
.IP "\s-1API\s0 Reference (Module::Build::API)" 4
.IX Item "API Reference (Module::Build::API)"
This is a reference to the \f(CW\*(C`Module::Build\*(C'\fR \s-1API\s0.
.IP "Cookbook (Module::Build::Cookbook)" 4
.IX Item "Cookbook (Module::Build::Cookbook)"
This document demonstrates how to accomplish many common tasks. It
covers general command line usage and authoring of \fIBuild.PL\fR
scripts. Includes working examples.
.SH "ACTIONS"
.IX Header "ACTIONS"
There are some general principles at work here. First, each task when
building a module is called an \*(L"action\*(R". These actions are listed
above; they correspond to the building, testing, installing,
packaging, etc., tasks.
.PP
Second, arguments are processed in a very systematic way. Arguments
are always key=value pairs. They may be specified at \f(CW\*(C`perl Build.PL\*(C'\fR
time (i.e. \f(CW\*(C`perl Build.PL destdir=/my/secret/place\*(C'\fR), in which case
their values last for the lifetime of the \f(CW\*(C`Build\*(C'\fR script. They may
also be specified when executing a particular action (i.e.
\&\f(CW\*(C`Build test verbose=1\*(C'\fR), in which case their values last only for the
lifetime of that command. Per-action command line parameters take
precedence over parameters specified at \f(CW\*(C`perl Build.PL\*(C'\fR time.
.PP
The build process also relies heavily on the \f(CW\*(C`Config.pm\*(C'\fR module.
If the user wishes to override any of the
values in \f(CW\*(C`Config.pm\*(C'\fR, she may specify them like so:
.PP
.Vb 1
\& perl Build.PL \-\-config cc=gcc \-\-config ld=gcc
.Ve
.PP
The following build actions are provided by default.
.IP "build" 4
.IX Item "build"
[version 0.01]
.Sp
If you run the \f(CW\*(C`Build\*(C'\fR script without any arguments, it runs the
\&\f(CW\*(C`build\*(C'\fR action, which in turn runs the \f(CW\*(C`code\*(C'\fR and \f(CW\*(C`docs\*(C'\fR actions.
.Sp
This is analogous to the \f(CW\*(C`MakeMaker\*(C'\fR \fImake all\fR target.
.IP "clean" 4
.IX Item "clean"
[version 0.01]
.Sp
This action will clean up any files that the build process may have
created, including the \f(CW\*(C`blib/\*(C'\fR directory (but not including the
\&\f(CW\*(C`_build/\*(C'\fR directory and the \f(CW\*(C`Build\*(C'\fR script itself).
.IP "code" 4
.IX Item "code"
[version 0.20]
.Sp
This action builds your code base.
.Sp
By default it just creates a \f(CW\*(C`blib/\*(C'\fR directory and copies any \f(CW\*(C`.pm\*(C'\fR
and \f(CW\*(C`.pod\*(C'\fR files from your \f(CW\*(C`lib/\*(C'\fR directory into the \f(CW\*(C`blib/\*(C'\fR
directory. It also compiles any \f(CW\*(C`.xs\*(C'\fR files from \f(CW\*(C`lib/\*(C'\fR and places
them in \f(CW\*(C`blib/\*(C'\fR. Of course, you need a working C compiler (probably
the same one that built perl itself) for the compilation to work
properly.
.Sp
The \f(CW\*(C`code\*(C'\fR action also runs any \f(CW\*(C`.PL\*(C'\fR files in your \fIlib/\fR
directory. Typically these create other files, named the same but
without the \f(CW\*(C`.PL\*(C'\fR ending. For example, a file \fIlib/Foo/Bar.pm.PL\fR
could create the file \fIlib/Foo/Bar.pm\fR. The \f(CW\*(C`.PL\*(C'\fR files are
processed first, so any \f(CW\*(C`.pm\*(C'\fR files (or other kinds that we deal
with) will get copied correctly.
.IP "config_data" 4
.IX Item "config_data"
[version 0.26]
.Sp
\&...
.IP "diff" 4
.IX Item "diff"
[version 0.14]
.Sp
This action will compare the files about to be installed with their
installed counterparts. For .pm and .pod files, a diff will be shown
(this currently requires a 'diff' program to be in your \s-1PATH\s0). For
other files like compiled binary files, we simply report whether they
differ.
.Sp
A \f(CW\*(C`flags\*(C'\fR parameter may be passed to the action, which will be passed
to the 'diff' program. Consult your 'diff' documentation for the
parameters it will accept \- a good one is \f(CW\*(C`\-u\*(C'\fR:
.Sp
.Vb 1
\& ./Build diff flags=\-u
.Ve
.IP "dist" 4
.IX Item "dist"
[version 0.02]
.Sp
This action is helpful for module authors who want to package up their
module for source distribution through a medium like \s-1CPAN\s0. It will create a
tarball of the files listed in \fI\s-1MANIFEST\s0\fR and compress the tarball using
\&\s-1GZIP\s0 compression.
.Sp
By default, this action will use the \f(CW\*(C`Archive::Tar\*(C'\fR module. However, you can
force it to use binary \*(L"tar\*(R" and \*(L"gzip\*(R" executables by supplying an explicit
\&\f(CW\*(C`tar\*(C'\fR (and optional \f(CW\*(C`gzip\*(C'\fR) parameter:
.Sp
.Vb 1
\& ./Build dist \-\-tar C:\epath\eto\etar.exe \-\-gzip C:\epath\eto\ezip.exe
.Ve
.IP "distcheck" 4
.IX Item "distcheck"
[version 0.05]
.Sp
Reports which files are in the build directory but not in the
\&\fI\s-1MANIFEST\s0\fR file, and vice versa. (See \*(L"manifest\*(R" for details.)
.IP "distclean" 4
.IX Item "distclean"
[version 0.05]
.Sp
Performs the 'realclean' action and then the 'distcheck' action.
.IP "distdir" 4
.IX Item "distdir"
[version 0.05]
.Sp
Creates a \*(L"distribution directory\*(R" named \f(CW\*(C`$dist_name\-$dist_version\*(C'\fR
(if that directory already exists, it will be removed first), then
copies all the files listed in the \fI\s-1MANIFEST\s0\fR file to that directory.
This directory is what the distribution tarball is created from.
.IP "distinstall" 4
.IX Item "distinstall"
[version 0.37]
.Sp
Performs the 'distdir' action, then switches into that directory and runs a
\&\f(CW\*(C`perl Build.PL\*(C'\fR, followed by the 'build' and 'install' actions in that
directory. Use \s-1PERL_MB_OPT\s0 or \fI.modulebuildrc\fR to set options that should be
applied during subprocesses
.IP "distmeta" 4
.IX Item "distmeta"
[version 0.21]
.Sp
Creates the \fI\s-1META\s0.yml\fR file that describes the distribution.
.Sp
\&\fI\s-1META\s0.yml\fR is a file containing various bits of \fImetadata\fR about the
distribution. The metadata includes the distribution name, version,
abstract, prerequisites, license, and various other data about the
distribution. This file is created as \fI\s-1META\s0.yml\fR in a simplified \s-1YAML\s0 format.
.Sp
\&\fI\s-1META\s0.yml\fR file must also be listed in \fI\s-1MANIFEST\s0\fR \- if it's not, a
warning will be issued.
.Sp
The current version of the \fI\s-1META\s0.yml\fR specification can be found
on \s-1CPAN\s0 as CPAN::Meta::Spec.
.IP "distsign" 4
.IX Item "distsign"
[version 0.16]
.Sp
Uses \f(CW\*(C`Module::Signature\*(C'\fR to create a \s-1SIGNATURE\s0 file for your
distribution, and adds the \s-1SIGNATURE\s0 file to the distribution's
\&\s-1MANIFEST\s0.
.IP "disttest" 4
.IX Item "disttest"
[version 0.05]
.Sp
Performs the 'distdir' action, then switches into that directory and runs a
\&\f(CW\*(C`perl Build.PL\*(C'\fR, followed by the 'build' and 'test' actions in that directory.
Use \s-1PERL_MB_OPT\s0 or \fI.modulebuildrc\fR to set options that should be applied
during subprocesses
.IP "docs" 4
.IX Item "docs"
[version 0.20]
.Sp
This will generate documentation (e.g. Unix man pages and \s-1HTML\s0
documents) for any installable items under \fBblib/\fR that
contain \s-1POD\s0. If there are no \f(CW\*(C`bindoc\*(C'\fR or \f(CW\*(C`libdoc\*(C'\fR installation
targets defined (as will be the case on systems that don't support
Unix manpages) no action is taken for manpages. If there are no
\&\f(CW\*(C`binhtml\*(C'\fR or \f(CW\*(C`libhtml\*(C'\fR installation targets defined no action is
taken for \s-1HTML\s0 documents.
.IP "fakeinstall" 4
.IX Item "fakeinstall"
[version 0.02]
.Sp
This is just like the \f(CW\*(C`install\*(C'\fR action, but it won't actually do
anything, it will just report what it \fIwould\fR have done if you had
actually run the \f(CW\*(C`install\*(C'\fR action.
.IP "help" 4
.IX Item "help"
[version 0.03]
.Sp
This action will simply print out a message that is meant to help you
use the build process. It will show you a list of available build
actions too.
.Sp
With an optional argument specifying an action name (e.g. \f(CW\*(C`Build help
test\*(C'\fR), the 'help' action will show you any \s-1POD\s0 documentation it can
find for that action.
.IP "html" 4
.IX Item "html"
[version 0.26]
.Sp
This will generate \s-1HTML\s0 documentation for any binary or library files
under \fBblib/\fR that contain \s-1POD\s0. The \s-1HTML\s0 documentation will only be
installed if the install paths can be determined from values in
\&\f(CW\*(C`Config.pm\*(C'\fR. You can also supply or override install paths on the
command line by specifying \f(CW\*(C`install_path\*(C'\fR values for the \f(CW\*(C`binhtml\*(C'\fR
and/or \f(CW\*(C`libhtml\*(C'\fR installation targets.
.Sp
With an optional \f(CW\*(C`html_links\*(C'\fR argument set to a false value, you can
skip the search for other documentation to link to, because that can
waste a lot of time if there aren't any links to generate anyway:
.Sp
.Vb 1
\& ./Build html \-\-html_links 0
.Ve
.IP "install" 4
.IX Item "install"
[version 0.01]
.Sp
This action will use \f(CW\*(C`ExtUtils::Install\*(C'\fR to install the files from
\&\f(CW\*(C`blib/\*(C'\fR into the system. See \*(L"\s-1INSTALL\s0 \s-1PATHS\s0\*(R"
for details about how Module::Build determines where to install
things, and how to influence this process.
.Sp
If you want the installation process to look around in \f(CW@INC\fR for
other versions of the stuff you're installing and try to delete it,
you can use the \f(CW\*(C`uninst\*(C'\fR parameter, which tells \f(CW\*(C`ExtUtils::Install\*(C'\fR to
do so:
.Sp
.Vb 1
\& ./Build install uninst=1
.Ve
.Sp
This can be a good idea, as it helps prevent multiple versions of a
module from being present on your system, which can be a confusing
situation indeed.
.IP "installdeps" 4
.IX Item "installdeps"
[version 0.36]
.Sp
This action will use the \f(CW\*(C`cpan_client\*(C'\fR parameter as a command to install
missing prerequisites. You will be prompted whether to install
optional dependencies.
.Sp
The \f(CW\*(C`cpan_client\*(C'\fR option defaults to 'cpan' but can be set as an option or in
\&\fI.modulebuildrc\fR. It must be a shell command that takes a list of modules to
install as arguments (e.g. 'cpanp \-i' for \s-1CPANPLUS\s0). If the program part is a
relative path (e.g. 'cpan' or 'cpanp'), it will be located relative to the perl
program that executed Build.PL.
.Sp
.Vb 3
\& /opt/perl/5.8.9/bin/perl Build.PL
\& ./Build installdeps \-\-cpan_client \*(Aqcpanp \-i\*(Aq
\& # installs to 5.8.9
.Ve
.IP "manifest" 4
.IX Item "manifest"
[version 0.05]
.Sp
This is an action intended for use by module authors, not people
installing modules. It will bring the \fI\s-1MANIFEST\s0\fR up to date with the
files currently present in the distribution. You may use a
\&\fI\s-1MANIFEST\s0.SKIP\fR file to exclude certain files or directories from
inclusion in the \fI\s-1MANIFEST\s0\fR. \fI\s-1MANIFEST\s0.SKIP\fR should contain a bunch
of regular expressions, one per line. If a file in the distribution
directory matches any of the regular expressions, it won't be included
in the \fI\s-1MANIFEST\s0\fR.
.Sp
The following is a reasonable \fI\s-1MANIFEST\s0.SKIP\fR starting point, you can
add your own stuff to it:
.Sp
.Vb 7
\& ^_build
\& ^Build$
\& ^blib
\& ~$
\& \e.bak$
\& ^MANIFEST\e.SKIP$
\& CVS
.Ve
.Sp
See the \*(L"distcheck\*(R" and \*(L"skipcheck\*(R" actions if you want to find out
what the \f(CW\*(C`manifest\*(C'\fR action would do, without actually doing anything.
.IP "manifest_skip" 4
.IX Item "manifest_skip"
[version 0.3608]
.Sp
This is an action intended for use by module authors, not people
installing modules. It will generate a boilerplate \s-1MANIFEST\s0.SKIP file
if one does not already exist.
.IP "manpages" 4
.IX Item "manpages"
[version 0.28]
.Sp
This will generate man pages for any binary or library files under
\&\fBblib/\fR that contain \s-1POD\s0. The man pages will only be installed if the
install paths can be determined from values in \f(CW\*(C`Config.pm\*(C'\fR. You can
also supply or override install paths by specifying there values on
the command line with the \f(CW\*(C`bindoc\*(C'\fR and \f(CW\*(C`libdoc\*(C'\fR installation
targets.
.IP "pardist" 4
.IX Item "pardist"
[version 0.2806]
.Sp
Generates a \s-1PAR\s0 binary distribution for use with \s-1PAR\s0 or PAR::Dist.
.Sp
It requires that the PAR::Dist module (version 0.17 and up) is
installed on your system.
.IP "ppd" 4
.IX Item "ppd"
[version 0.20]
.Sp
Build a \s-1PPD\s0 file for your distribution.
.Sp
This action takes an optional argument \f(CW\*(C`codebase\*(C'\fR which is used in
the generated \s-1PPD\s0 file to specify the (usually relative) \s-1URL\s0 of the
distribution. By default, this value is the distribution name without
any path information.
.Sp
Example:
.Sp
.Vb 1
\& ./Build ppd \-\-codebase "MSWin32\-x86\-multi\-thread/Module\-Build\-0.21.tar.gz"
.Ve
.IP "ppmdist" 4
.IX Item "ppmdist"
[version 0.23]
.Sp
Generates a \s-1PPM\s0 binary distribution and a \s-1PPD\s0 description file. This
action also invokes the \f(CW\*(C`ppd\*(C'\fR action, so it can accept the same
\&\f(CW\*(C`codebase\*(C'\fR argument described under that action.
.Sp
This uses the same mechanism as the \f(CW\*(C`dist\*(C'\fR action to tar & zip its
output, so you can supply \f(CW\*(C`tar\*(C'\fR and/or \f(CW\*(C`gzip\*(C'\fR parameters to affect
the result.
.IP "prereq_data" 4
.IX Item "prereq_data"
[version 0.32]
.Sp
This action prints out a Perl data structure of all prerequisites and the versions
required. The output can be loaded again using \f(CW\*(C`eval()\*(C'\fR. This can be useful for
external tools that wish to query a Build script for prerequisites.
.IP "prereq_report" 4
.IX Item "prereq_report"
[version 0.28]
.Sp
This action prints out a list of all prerequisites, the versions required, and
the versions actually installed. This can be useful for reviewing the
configuration of your system prior to a build, or when compiling data to send
for a bug report.
.IP "pure_install" 4
.IX Item "pure_install"
[version 0.28]
.Sp
This action is identical to the \f(CW\*(C`install\*(C'\fR action. In the future,
though, when \f(CW\*(C`install\*(C'\fR starts writing to the file
\&\fI$(\s-1INSTALLARCHLIB\s0)/perllocal.pod\fR, \f(CW\*(C`pure_install\*(C'\fR won't, and that
will be the only difference between them.
.IP "realclean" 4
.IX Item "realclean"
[version 0.01]
.Sp
This action is just like the \f(CW\*(C`clean\*(C'\fR action, but also removes the
\&\f(CW\*(C`_build\*(C'\fR directory and the \f(CW\*(C`Build\*(C'\fR script. If you run the
\&\f(CW\*(C`realclean\*(C'\fR action, you are essentially starting over, so you will
have to re-create the \f(CW\*(C`Build\*(C'\fR script again.
.IP "retest" 4
.IX Item "retest"
[version 0.2806]
.Sp
This is just like the \f(CW\*(C`test\*(C'\fR action, but doesn't actually build the
distribution first, and doesn't add \fIblib/\fR to the load path, and
therefore will test against a \fIpreviously\fR installed version of the
distribution. This can be used to verify that a certain installed
distribution still works, or to see whether newer versions of a
distribution still pass the old regression tests, and so on.
.IP "skipcheck" 4
.IX Item "skipcheck"
[version 0.05]
.Sp
Reports which files are skipped due to the entries in the
\&\fI\s-1MANIFEST\s0.SKIP\fR file (See \*(L"manifest\*(R" for details)
.IP "test" 4
.IX Item "test"
[version 0.01]
.Sp
This will use \f(CW\*(C`Test::Harness\*(C'\fR or \f(CW\*(C`TAP::Harness\*(C'\fR to run any regression
tests and report their results. Tests can be defined in the standard
places: a file called \f(CW\*(C`test.pl\*(C'\fR in the top-level directory, or several
files ending with \f(CW\*(C`.t\*(C'\fR in a \f(CW\*(C`t/\*(C'\fR directory.
.Sp
If you want tests to be 'verbose', i.e. show details of test execution
rather than just summary information, pass the argument \f(CW\*(C`verbose=1\*(C'\fR.
.Sp
If you want to run tests under the perl debugger, pass the argument
\&\f(CW\*(C`debugger=1\*(C'\fR.
.Sp
If you want to have Module::Build find test files with different file
name extensions, pass the \f(CW\*(C`test_file_exts\*(C'\fR argument with an array
of extensions, such as \f(CW\*(C`[qw( .t .s .z )]\*(C'\fR.
.Sp
If you want test to be run by \f(CW\*(C`TAP::Harness\*(C'\fR, rather than \f(CW\*(C`Test::Harness\*(C'\fR,
pass the argument \f(CW\*(C`tap_harness_args\*(C'\fR as an array reference of arguments to
pass to the TAP::Harness constructor.
.Sp
In addition, if a file called \f(CW\*(C`visual.pl\*(C'\fR exists in the top-level
directory, this file will be executed as a Perl script and its output
will be shown to the user. This is a good place to put speed tests or
other tests that don't use the \f(CW\*(C`Test::Harness\*(C'\fR format for output.
.Sp
To override the choice of tests to run, you may pass a \f(CW\*(C`test_files\*(C'\fR
argument whose value is a whitespace-separated list of test scripts to
run. This is especially useful in development, when you only want to
run a single test to see whether you've squashed a certain bug yet:
.Sp
.Vb 1
\& ./Build test \-\-test_files t/something_failing.t
.Ve
.Sp
You may also pass several \f(CW\*(C`test_files\*(C'\fR arguments separately:
.Sp
.Vb 1
\& ./Build test \-\-test_files t/one.t \-\-test_files t/two.t
.Ve
.Sp
or use a \f(CW\*(C`glob()\*(C'\fR\-style pattern:
.Sp
.Vb 1
\& ./Build test \-\-test_files \*(Aqt/01\-*.t\*(Aq
.Ve
.IP "testall" 4
.IX Item "testall"
[version 0.2807]
.Sp
[Note: the 'testall' action and the code snippets below are currently
in alpha stage, see
<http://www.nntp.perl.org/group/perl.module.build/2007/03/msg584.html> ]
.Sp
Runs the \f(CW\*(C`test\*(C'\fR action plus each of the \f(CW\*(C`test$type\*(C'\fR actions defined by
the keys of the \f(CW\*(C`test_types\*(C'\fR parameter.
.Sp
Currently, you need to define the ACTION_test$type method yourself and
enumerate them in the test_types parameter.
.Sp
.Vb 12
\& my $mb = Module::Build\->subclass(
\& code => q(
\& sub ACTION_testspecial { shift\->generic_test(type => \*(Aqspecial\*(Aq); }
\& sub ACTION_testauthor { shift\->generic_test(type => \*(Aqauthor\*(Aq); }
\& )
\& )\->new(
\& ...
\& test_types => {
\& special => \*(Aq.st\*(Aq,
\& author => [\*(Aq.at\*(Aq, \*(Aq.pt\*(Aq ],
\& },
\& ...
.Ve
.IP "testcover" 4
.IX Item "testcover"
[version 0.26]
.Sp
Runs the \f(CW\*(C`test\*(C'\fR action using \f(CW\*(C`Devel::Cover\*(C'\fR, generating a
code-coverage report showing which parts of the code were actually
exercised during the tests.
.Sp
To pass options to \f(CW\*(C`Devel::Cover\*(C'\fR, set the \f(CW$DEVEL_COVER_OPTIONS\fR
environment variable:
.Sp
.Vb 1
\& DEVEL_COVER_OPTIONS=\-ignore,Build ./Build testcover
.Ve
.IP "testdb" 4
.IX Item "testdb"
[version 0.05]
.Sp
This is a synonym for the 'test' action with the \f(CW\*(C`debugger=1\*(C'\fR
argument.
.IP "testpod" 4
.IX Item "testpod"
[version 0.25]
.Sp
This checks all the files described in the \f(CW\*(C`docs\*(C'\fR action and
produces \f(CW\*(C`Test::Harness\*(C'\fR\-style output. If you are a module author,
this is useful to run before creating a new release.
.IP "testpodcoverage" 4
.IX Item "testpodcoverage"
[version 0.28]
.Sp
This checks the pod coverage of the distribution and
produces \f(CW\*(C`Test::Harness\*(C'\fR\-style output. If you are a module author,
this is useful to run before creating a new release.
.IP "versioninstall" 4
.IX Item "versioninstall"
[version 0.16]
.Sp
** Note: since \f(CW\*(C`only.pm\*(C'\fR is so new, and since we just recently added
support for it here too, this feature is to be considered
experimental. **
.Sp
If you have the \f(CW\*(C`only.pm\*(C'\fR module installed on your system, you can
use this action to install a module into the version-specific library
trees. This means that you can have several versions of the same
module installed and \f(CW\*(C`use\*(C'\fR a specific one like this:
.Sp
.Vb 1
\& use only MyModule => 0.55;
.Ve
.Sp
To override the default installation libraries in \f(CW\*(C`only::config\*(C'\fR,
specify the \f(CW\*(C`versionlib\*(C'\fR parameter when you run the \f(CW\*(C`Build.PL\*(C'\fR script:
.Sp
.Vb 1
\& perl Build.PL \-\-versionlib /my/version/place/
.Ve
.Sp
To override which version the module is installed as, specify the
\&\f(CW\*(C`version\*(C'\fR parameter when you run the \f(CW\*(C`Build.PL\*(C'\fR script:
.Sp
.Vb 1
\& perl Build.PL \-\-version 0.50
.Ve
.Sp
See the \f(CW\*(C`only.pm\*(C'\fR documentation for more information on
version-specific installs.
.SH "OPTIONS"
.IX Header "OPTIONS"
.SS "Command Line Options"
.IX Subsection "Command Line Options"
The following options can be used during any invocation of \f(CW\*(C`Build.PL\*(C'\fR
or the Build script, during any action. For information on other
options specific to an action, see the documentation for the
respective action.
.PP
\&\s-1NOTE:\s0 There is some preliminary support for options to use the more
familiar long option style. Most options can be preceded with the
\&\f(CW\*(C`\-\-\*(C'\fR long option prefix, and the underscores changed to dashes
(e.g. \f(CW\*(C`\-\-use\-rcfile\*(C'\fR). Additionally, the argument to boolean options is
optional, and boolean options can be negated by prefixing them with
\&\f(CW\*(C`no\*(C'\fR or \f(CW\*(C`no\-\*(C'\fR (e.g. \f(CW\*(C`\-\-noverbose\*(C'\fR or \f(CW\*(C`\-\-no\-verbose\*(C'\fR).
.IP "quiet" 4
.IX Item "quiet"
Suppress informative messages on output.
.IP "verbose" 4
.IX Item "verbose"
Display extra information about the Build on output. \f(CW\*(C`verbose\*(C'\fR will
turn off \f(CW\*(C`quiet\*(C'\fR
.IP "cpan_client" 4
.IX Item "cpan_client"
Sets the \f(CW\*(C`cpan_client\*(C'\fR command for use with the \f(CW\*(C`installdeps\*(C'\fR action.
See \f(CW\*(C`installdeps\*(C'\fR for more details.
.IP "use_rcfile" 4
.IX Item "use_rcfile"
Load the \fI~/.modulebuildrc\fR option file. This option can be set to
false to prevent the custom resource file from being loaded.
.IP "allow_mb_mismatch" 4
.IX Item "allow_mb_mismatch"
Suppresses the check upon startup that the version of Module::Build
we're now running under is the same version that was initially invoked
when building the distribution (i.e. when the \f(CW\*(C`Build.PL\*(C'\fR script was
first run). As of 0.3601, a mismatch results in a warning instead of
a fatal error, so this option effectively just suppresses the warning.
.IP "debug" 4
.IX Item "debug"
Prints Module::Build debugging information to \s-1STDOUT\s0, such as a trace of
executed build actions.
.SS "Default Options File (\fI.modulebuildrc\fP)"
.IX Subsection "Default Options File (.modulebuildrc)"
[version 0.28]
.PP
When Module::Build starts up, it will look first for a file,
\&\fI\f(CI$ENV\fI{\s-1HOME\s0}/.modulebuildrc\fR. If it's not found there, it will look
in the \fI.modulebuildrc\fR file in the directories referred to by
the environment variables \f(CW\*(C`HOMEDRIVE\*(C'\fR + \f(CW\*(C`HOMEDIR\*(C'\fR, \f(CW\*(C`USERPROFILE\*(C'\fR,
\&\f(CW\*(C`APPDATA\*(C'\fR, \f(CW\*(C`WINDIR\*(C'\fR, \f(CW\*(C`SYS$LOGIN\*(C'\fR. If the file exists, the options
specified there will be used as defaults, as if they were typed on the
command line. The defaults can be overridden by specifying new values
on the command line.
.PP
The action name must come at the beginning of the line, followed by any
amount of whitespace and then the options. Options are given the same
as they would be on the command line. They can be separated by any
amount of whitespace, including newlines, as long there is whitespace at
the beginning of each continued line. Anything following a hash mark (\f(CW\*(C`#\*(C'\fR)
is considered a comment, and is stripped before parsing. If more than
one line begins with the same action name, those lines are merged into
one set of options.
.PP
Besides the regular actions, there are two special pseudo-actions: the
key \f(CW\*(C`*\*(C'\fR (asterisk) denotes any global options that should be applied
to all actions, and the key 'Build_PL' specifies options to be applied
when you invoke \f(CW\*(C`perl Build.PL\*(C'\fR.
.PP
.Vb 5
\& * verbose=1 # global options
\& diff flags=\-u
\& install \-\-install_base /home/ken
\& \-\-install_path html=/home/ken/docs/html
\& installdeps \-\-cpan_client \*(Aqcpanp \-i\*(Aq
.Ve
.PP
If you wish to locate your resource file in a different location, you
can set the environment variable \f(CW\*(C`MODULEBUILDRC\*(C'\fR to the complete
absolute path of the file containing your options.
.SS "Environment variables"
.IX Subsection "Environment variables"
.IP "\s-1MODULEBUILDRC\s0" 4
.IX Item "MODULEBUILDRC"
[version 0.28]
.Sp
Specifies an alternate location for a default options file as described above.
.IP "\s-1PERL_MB_OPT\s0" 4
.IX Item "PERL_MB_OPT"
[version 0.36]
.Sp
Command line options that are applied to Build.PL or any Build action. The
string is split as the shell would (e.g. whitespace) and the result is
prepended to any actual command-line arguments.
.SH "INSTALL PATHS"
.IX Header "INSTALL PATHS"
[version 0.19]
.PP
When you invoke Module::Build's \f(CW\*(C`build\*(C'\fR action, it needs to figure
out where to install things. The nutshell version of how this works
is that default installation locations are determined from
\&\fIConfig.pm\fR, and they may be overridden by using the \f(CW\*(C`install_path\*(C'\fR
parameter. An \f(CW\*(C`install_base\*(C'\fR parameter lets you specify an
alternative installation root like \fI/home/foo\fR, and a \f(CW\*(C`destdir\*(C'\fR lets
you specify a temporary installation directory like \fI/tmp/install\fR in
case you want to create bundled-up installable packages.
.PP
Natively, Module::Build provides default installation locations for
the following types of installable items:
.IP "lib" 4
.IX Item "lib"
Usually pure-Perl module files ending in \fI.pm\fR.
.IP "arch" 4
.IX Item "arch"
\&\*(L"Architecture-dependent\*(R" module files, usually produced by compiling
\&\s-1XS\s0, Inline, or similar code.
.IP "script" 4
.IX Item "script"
Programs written in pure Perl. In order to improve reuse, try to make
these as small as possible \- put the code into modules whenever
possible.
.IP "bin" 4
.IX Item "bin"
\&\*(L"Architecture-dependent\*(R" executable programs, i.e. compiled C code or
something. Pretty rare to see this in a perl distribution, but it
happens.
.IP "bindoc" 4
.IX Item "bindoc"
Documentation for the stuff in \f(CW\*(C`script\*(C'\fR and \f(CW\*(C`bin\*(C'\fR. Usually
generated from the \s-1POD\s0 in those files. Under Unix, these are manual
pages belonging to the 'man1' category.
.IP "libdoc" 4
.IX Item "libdoc"
Documentation for the stuff in \f(CW\*(C`lib\*(C'\fR and \f(CW\*(C`arch\*(C'\fR. This is usually
generated from the \s-1POD\s0 in \fI.pm\fR files. Under Unix, these are manual
pages belonging to the 'man3' category.
.IP "binhtml" 4
.IX Item "binhtml"
This is the same as \f(CW\*(C`bindoc\*(C'\fR above, but applies to \s-1HTML\s0 documents.
.IP "libhtml" 4
.IX Item "libhtml"
This is the same as \f(CW\*(C`libdoc\*(C'\fR above, but applies to \s-1HTML\s0 documents.
.PP
Four other parameters let you control various aspects of how
installation paths are determined:
.IP "installdirs" 4
.IX Item "installdirs"
The default destinations for these installable things come from
entries in your system's \f(CW\*(C`Config.pm\*(C'\fR. You can select from three
different sets of default locations by setting the \f(CW\*(C`installdirs\*(C'\fR
parameter as follows:
.Sp
.Vb 2
\& \*(Aqinstalldirs\*(Aq set to:
\& core site vendor
\&
\& uses the following defaults from Config.pm:
\&
\& lib => installprivlib installsitelib installvendorlib
\& arch => installarchlib installsitearch installvendorarch
\& script => installscript installsitescript installvendorscript
\& bin => installbin installsitebin installvendorbin
\& bindoc => installman1dir installsiteman1dir installvendorman1dir
\& libdoc => installman3dir installsiteman3dir installvendorman3dir
\& binhtml => installhtml1dir installsitehtml1dir installvendorhtml1dir [*]
\& libhtml => installhtml3dir installsitehtml3dir installvendorhtml3dir [*]
\&
\& * Under some OS (eg. MSWin32) the destination for HTML documents is
\& determined by the C<Config.pm> entry C<installhtmldir>.
.Ve
.Sp
The default value of \f(CW\*(C`installdirs\*(C'\fR is \*(L"site\*(R". If you're creating
vendor distributions of module packages, you may want to do something
like this:
.Sp
.Vb 1
\& perl Build.PL \-\-installdirs vendor
.Ve
.Sp
or
.Sp
.Vb 1
\& ./Build install \-\-installdirs vendor
.Ve
.Sp
If you're installing an updated version of a module that was included
with perl itself (i.e. a \*(L"core module\*(R"), then you may set
\&\f(CW\*(C`installdirs\*(C'\fR to \*(L"core\*(R" to overwrite the module in its present
location.
.Sp
(Note that the 'script' line is different from \f(CW\*(C`MakeMaker\*(C'\fR \-
unfortunately there's no such thing as \*(L"installsitescript\*(R" or
\&\*(L"installvendorscript\*(R" entry in \f(CW\*(C`Config.pm\*(C'\fR, so we use the
\&\*(L"installsitebin\*(R" and \*(L"installvendorbin\*(R" entries to at least get the
general location right. In the future, if \f(CW\*(C`Config.pm\*(C'\fR adds some more
appropriate entries, we'll start using those.)
.IP "install_path" 4
.IX Item "install_path"
Once the defaults have been set, you can override them.
.Sp
On the command line, that would look like this:
.Sp
.Vb 1
\& perl Build.PL \-\-install_path lib=/foo/lib \-\-install_path arch=/foo/lib/arch
.Ve
.Sp
or this:
.Sp
.Vb 1
\& ./Build install \-\-install_path lib=/foo/lib \-\-install_path arch=/foo/lib/arch
.Ve
.IP "install_base" 4
.IX Item "install_base"
You can also set the whole bunch of installation paths by supplying the
\&\f(CW\*(C`install_base\*(C'\fR parameter to point to a directory on your system. For
instance, if you set \f(CW\*(C`install_base\*(C'\fR to \*(L"/home/ken\*(R" on a Linux
system, you'll install as follows:
.Sp
.Vb 8
\& lib => /home/ken/lib/perl5
\& arch => /home/ken/lib/perl5/i386\-linux
\& script => /home/ken/bin
\& bin => /home/ken/bin
\& bindoc => /home/ken/man/man1
\& libdoc => /home/ken/man/man3
\& binhtml => /home/ken/html
\& libhtml => /home/ken/html
.Ve
.Sp
Note that this is \fIdifferent\fR from how \f(CW\*(C`MakeMaker\*(C'\fR's \f(CW\*(C`PREFIX\*(C'\fR
parameter works. \f(CW\*(C`install_base\*(C'\fR just gives you a default layout under the
directory you specify, which may have little to do with the
\&\f(CW\*(C`installdirs=site\*(C'\fR layout.
.Sp
The exact layout under the directory you specify may vary by system \-
we try to do the \*(L"sensible\*(R" thing on each platform.
.IP "destdir" 4
.IX Item "destdir"
If you want to install everything into a temporary directory first
(for instance, if you want to create a directory tree that a package
manager like \f(CW\*(C`rpm\*(C'\fR or \f(CW\*(C`dpkg\*(C'\fR could create a package from), you can
use the \f(CW\*(C`destdir\*(C'\fR parameter:
.Sp
.Vb 1
\& perl Build.PL \-\-destdir /tmp/foo
.Ve
.Sp
or
.Sp
.Vb 1
\& ./Build install \-\-destdir /tmp/foo
.Ve
.Sp
This will effectively install to \*(L"/tmp/foo/$sitelib\*(R",
\&\*(L"/tmp/foo/$sitearch\*(R", and the like, except that it will use
\&\f(CW\*(C`File::Spec\*(C'\fR to make the pathnames work correctly on whatever
platform you're installing on.
.IP "prefix" 4
.IX Item "prefix"
Provided for compatibility with \f(CW\*(C`ExtUtils::MakeMaker\*(C'\fR's \s-1PREFIX\s0 argument.
\&\f(CW\*(C`prefix\*(C'\fR should be used when you want Module::Build to install your
modules, documentation, and scripts in the same place as
\&\f(CW\*(C`ExtUtils::MakeMaker\*(C'\fR's \s-1PREFIX\s0 mechanism.
.Sp
The following are equivalent.
.Sp
.Vb 2
\& perl Build.PL \-\-prefix /tmp/foo
\& perl Makefile.PL PREFIX=/tmp/foo
.Ve
.Sp
Because of the complex nature of the prefixification logic, the
behavior of \s-1PREFIX\s0 in \f(CW\*(C`MakeMaker\*(C'\fR has changed subtly over time.
Module::Build's \-\-prefix logic is equivalent to the \s-1PREFIX\s0 logic found
in \f(CW\*(C`ExtUtils::MakeMaker\*(C'\fR 6.30.
.Sp
The maintainers of \f(CW\*(C`MakeMaker\*(C'\fR do understand the troubles with the
\&\s-1PREFIX\s0 mechanism, and added \s-1INSTALL_BASE\s0 support in version 6.31 of
\&\f(CW\*(C`MakeMaker\*(C'\fR, which was released in 2006.
.Sp
If you don't need to retain compatibility with old versions (pre\-6.31) of \f(CW\*(C`ExtUtils::MakeMaker\*(C'\fR or
are starting a fresh Perl installation we recommend you use
\&\f(CW\*(C`install_base\*(C'\fR instead (and \f(CW\*(C`INSTALL_BASE\*(C'\fR in \f(CW\*(C`ExtUtils::MakeMaker\*(C'\fR).
See \*(L"Installing in the same location as
ExtUtils::MakeMaker\*(R" in Module::Build::Cookbook for further information.
.SH "COMPARISON"
.IX Header "COMPARISON"
A comparison between \f(CW\*(C`Module::Build\*(C'\fR and other \s-1CPAN\s0 distribution installers.
.IP "\(bu" 4
ExtUtils::MakeMaker requires \f(CW\*(C`make\*(C'\fR and use of a \fIMakefile\fR.
\&\f(CW\*(C`Module::Build\*(C'\fR does not, nor do other pure-perl installers following the
\&\fIBuild.PL\fR spec such as Module::Build::Tiny. In practice, this is usually
not an issue for the end user, as \f(CW\*(C`make\*(C'\fR is already required to install most
\&\s-1CPAN\s0 modules, even on Windows.
.IP "\(bu" 4
ExtUtils::MakeMaker has been a core module in every version of Perl 5, and
must maintain compatibility to install the majority of \s-1CPAN\s0 modules.
\&\f(CW\*(C`Module::Build\*(C'\fR was added to core in Perl 5.10 and removed from core in Perl
5.20, and (like ExtUtils::MakeMaker) is only updated to fix critical issues
and maintain compatibility. \f(CW\*(C`Module::Build\*(C'\fR and other non-core installers like
Module::Build::Tiny are installed from \s-1CPAN\s0 by declaring themselves as a
\&\f(CW\*(C`configure\*(C'\fR phase prerequisite, and in this way any installer can be used in
place of ExtUtils::MakeMaker.
.IP "\(bu" 4
Customizing the build process with ExtUtils::MakeMaker involves overriding
certain methods that form the \fIMakefile\fR by defining the subs in the \f(CW\*(C`MY::\*(C'\fR
namespace, requiring in-depth knowledge of \fIMakefile\fR, but allowing targeted
customization of the entire build. Customizing \f(CW\*(C`Module::Build\*(C'\fR involves
subclassing \f(CW\*(C`Module::Build\*(C'\fR itself, adding or overriding pure-perl methods
that represent build actions, which are invoked as arguments passed to the
generated \f(CW\*(C`./Build\*(C'\fR script. This is a simpler concept but requires redefining
the standard build actions to invoke your customizations.
Module::Build::Tiny does not allow for customization.
.IP "\(bu" 4
\&\f(CW\*(C`Module::Build\*(C'\fR provides more features and a better experience for distribution
authors than ExtUtils::MakeMaker. However, tools designed specifically for
authoring, such as Dist::Zilla and its spinoffs Dist::Milla and
Minilla, provide these features and more, and generate a configure script
(\fIMakefile.PL\fR/\fIBuild.PL\fR) that will use any of the various installers
separately on the end user side. App::ModuleBuildTiny is an alternative
standalone authoring tool for distributions using Module::Build::Tiny, which
requires only a simple two-line \fIBuild.PL\fR.
.SH "TO DO"
.IX Header "TO DO"
The current method of relying on time stamps to determine whether a
derived file is out of date isn't likely to scale well, since it
requires tracing all dependencies backward, it runs into problems on
\&\s-1NFS\s0, and it's just generally flimsy. It would be better to use an \s-1MD5\s0
signature or the like, if available. See \f(CW\*(C`cons\*(C'\fR for an example.
.PP
.Vb 2
\& \- append to perllocal.pod
\& \- add a \*(Aqplugin\*(Aq functionality
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
Ken Williams <kwilliams@cpan.org>
.PP
Development questions, bug reports, and patches should be sent to the
Module-Build mailing list at <module\-build@perl.org>.
.PP
Bug reports are also welcome at
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Module\-Build>.
.PP
The latest development version is available from the Git
repository at <https://github.com/Perl\-Toolchain\-Gang/Module\-Build>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2001\-2006 Ken Williams. All rights reserved.
.PP
This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIperl\fR\|(1), Module::Build::Cookbook, Module::Build::Authoring,
Module::Build::API, ExtUtils::MakeMaker
.PP
\&\fI\s-1META\s0.yml\fR Specification:
CPAN::Meta::Spec
.PP
<http://www.dsmit.com/cons/>
.PP
<http://search.cpan.org/dist/PerlBuildSystem/>
Copyright 2K16 - 2K18 Indonesian Hacker Rulez
;?>)