6d3962f0bd
This commit improves the scancpan script to automatically populate the LICENSE_FILES variable using informations available in the Perl package MANIFEST file. Signed-off-by: Francois Perrad <francois.perrad@gadz.org> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
119 lines
4.6 KiB
Plaintext
119 lines
4.6 KiB
Plaintext
// -*- mode:doc; -*-
|
|
// vim: set syntax=asciidoc:
|
|
|
|
=== Infrastructure for Perl/CPAN packages
|
|
|
|
[[perl-package-tutorial]]
|
|
|
|
==== +perl-package+ tutorial
|
|
|
|
First, let's see how to write a +.mk+ file for a Perl/CPAN package,
|
|
with an example :
|
|
|
|
------------------------
|
|
01: ################################################################################
|
|
02: #
|
|
03: # perl-foo-bar
|
|
04: #
|
|
05: ################################################################################
|
|
06:
|
|
07: PERL_FOO_BAR_VERSION = 0.02
|
|
08: PERL_FOO_BAR_SOURCE = Foo-Bar-$(PERL_FOO_BAR_VERSION).tar.gz
|
|
09: PERL_FOO_BAR_SITE = $(BR2_CPAN_MIRROR)/authors/id/M/MO/MONGER/
|
|
10: PERL_FOO_BAR_DEPENDENCIES = perl-strictures
|
|
11: PERL_FOO_BAR_LICENSE = Artistic or GPLv1+
|
|
12: PERL_FOO_BAR_LICENSE_FILES = LICENSE
|
|
13:
|
|
14: $(eval $(perl-package))
|
|
------------------------
|
|
|
|
On line 7, we declare the version of the package.
|
|
|
|
On line 8 and 9, we declare the name of the tarball and the location
|
|
of the tarball on a CPAN server. Buildroot will automatically download
|
|
the tarball from this location.
|
|
|
|
On line 10, we declare our dependencies, so that they are built
|
|
before the build process of our package starts.
|
|
|
|
On line 11 and 12, we give licensing details about the package (its
|
|
license on line 11, and the file containing the license text on line
|
|
12).
|
|
|
|
Finally, on line 14, we invoke the +perl-package+ macro that
|
|
generates all the Makefile rules that actually allow the package to be
|
|
built.
|
|
|
|
Most of these data can be retrieved from https://metacpan.org/.
|
|
So, this file and the Config.in can be generated by running
|
|
the script +supports/scripts/scancpan Foo-Bar+ in the Buildroot directory
|
|
(or in the +BR2_EXTERNAL+ directory).
|
|
This script creates a Config.in file and foo-bar.mk file for the
|
|
requested package, and also recursively for all dependencies specified by
|
|
CPAN. You should still manually edit the result. In particular, the
|
|
following things should be checked.
|
|
|
|
* If the perl module links with a shared library that is provided by
|
|
another (non-perl) package, this dependency is not added automatically.
|
|
It has to be added manually to +PERL_FOO_BAR_DEPENDENCIES+.
|
|
* The +package/Config.in+ file has to be updated manually to include the
|
|
generated Config.in files. As a hint, the +scancpan+ script prints out
|
|
the required +source "..."+ statements, sorted alphabetically.
|
|
|
|
[[perl-package-reference]]
|
|
|
|
==== +perl-package+ reference
|
|
|
|
As a policy, packages that provide Perl/CPAN modules should all be
|
|
named +perl-<something>+ in Buildroot.
|
|
|
|
This infrastructure handles various Perl build systems :
|
|
+ExtUtils-MakeMaker+, +Module-Build+ and +Module-Build-Tiny+.
|
|
+Build.PL+ is always preferred when a package provides a +Makefile.PL+
|
|
and a +Build.PL+.
|
|
|
|
The main macro of the Perl/CPAN package infrastructure is
|
|
+perl-package+. It is similar to the +generic-package+ macro. The ability to
|
|
have target and host packages is also available, with the
|
|
+host-perl-package+ macro.
|
|
|
|
Just like the generic infrastructure, the Perl/CPAN infrastructure
|
|
works by defining a number of variables before calling the
|
|
+perl-package+ macro.
|
|
|
|
First, all the package metadata information variables that exist in the
|
|
generic infrastructure also exist in the Perl/CPAN infrastructure:
|
|
+PERL_FOO_VERSION+, +PERL_FOO_SOURCE+,
|
|
+PERL_FOO_PATCH+, +PERL_FOO_SITE+,
|
|
+PERL_FOO_SUBDIR+, +PERL_FOO_DEPENDENCIES+,
|
|
+PERL_FOO_INSTALL_TARGET+.
|
|
|
|
Note that setting +PERL_FOO_INSTALL_STAGING+ to +YES+ has no effect
|
|
unless a +PERL_FOO_INSTALL_STAGING_CMDS+ variable is defined. The perl
|
|
infrastructure doesn't define these commands since Perl modules generally
|
|
don't need to be installed to the +staging+ directory.
|
|
|
|
A few additional variables, specific to the Perl/CPAN infrastructure,
|
|
can also be defined. Many of them are only useful in very specific
|
|
cases, typical packages will therefore only use a few of them.
|
|
|
|
* +PERL_FOO_CONF_ENV+/+HOST_PERL_FOO_CONF_ENV+, to specify additional
|
|
environment variables to pass to the +perl Makefile.PL+ or +perl Build.PL+.
|
|
By default, empty.
|
|
|
|
* +PERL_FOO_CONF_OPT+/+HOST_PERL_FOO_CONF_OPT+, to specify additional
|
|
configure options to pass to the +perl Makefile.PL+ or +perl Build.PL+.
|
|
By default, empty.
|
|
|
|
* +PERL_FOO_BUILD_OPT+/+HOST_PERL_FOO_BUILD_OPT+, to specify additional
|
|
options to pass to +make pure_all+ or +perl Build build+ in the build step.
|
|
By default, empty.
|
|
|
|
* +PERL_FOO_INSTALL_TARGET_OPT+, to specify additional options to
|
|
pass to +make pure_install+ or +perl Build install+ in the install step.
|
|
By default, empty.
|
|
|
|
* +HOST_PERL_FOO_INSTALL_OPT+, to specify additional options to
|
|
pass to +make pure_install+ or +perl Build install+ in the install step.
|
|
By default, empty.
|