kumquat-buildroot/docs/manual/adding-packages-perl.txt

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// -*- mode:doc; -*-
// vim: set syntax=asciidoc:
manual: use one-line titles instead of two-line titles (trivial) Asciidoc supports two syntaxes for section titles: two-line titles (title plus underline consisting of a particular symbol), and one-line titles (title prefixed with a specific number of = signs). The two-line title underlines are: Level 0 (top level): ====================== Level 1: ---------------------- Level 2: ~~~~~~~~~~~~~~~~~~~~~~ Level 3: ^^^^^^^^^^^^^^^^^^^^^^ Level 4 (bottom level): ++++++++++++++++++++++ and the one-line title prefixes: = Document Title (level 0) = == Section title (level 1) == === Section title (level 2) === ==== Section title (level 3) ==== ===== Section title (level 4) ===== The buildroot manual is currenly using the two-line titles, but this has multiple disadvantages: - asciidoc also uses some of the underline symbols for other purposes (like preformatted code, example blocks, ...), which makes it difficult to do mass replacements, such as a planned follow-up patch that needs to move all sections one level down. - it is difficult to remember which level a given underline symbol (=-~^+) corresponds to, while counting = signs is easy. This patch changes all two-level titles to one-level titles in the manual. The bulk of the change was done with the following Python script, except for the level 1 titles (-----) as these underlines are also used for literal code blocks. This patch only changes the titles, no other changes. In adding-packages-directory.txt, I did add missing newlines between some titles and their content. ---------------------------------------------------------------------------- #!/usr/bin/env python import sys import mmap import re for input in sys.argv[1:]: f = open(input, 'r+') f.flush() s = mmap.mmap(f.fileno(), 0) # Level 0 (top level): ====================== = # Level 1: ---------------------- == # Level 2: ~~~~~~~~~~~~~~~~~~~~~~ === # Level 3: ^^^^^^^^^^^^^^^^^^^^^^ ==== # Level 4 (bottom level): ++++++++++++++++++++++ ===== def replace_title(s, symbol, replacement): pattern = re.compile(r'(.+\n)\%s{2,}\n' % symbol, re.MULTILINE) return pattern.sub(r'%s \1' % replacement, s) new = s new = replace_title(new, '=', '=') new = replace_title(new, '+', '=====') new = replace_title(new, '^', '====') new = replace_title(new, '~', '===') #new = replace_title(new, '-', '==') s.seek(0) s.write(new) s.resize(s.tell()) s.close() f.close() ---------------------------------------------------------------------------- Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-05-02 07:47:30 +02:00
=== Infrastructure for Perl/CPAN packages
[[perl-package-tutorial]]
manual: use one-line titles instead of two-line titles (trivial) Asciidoc supports two syntaxes for section titles: two-line titles (title plus underline consisting of a particular symbol), and one-line titles (title prefixed with a specific number of = signs). The two-line title underlines are: Level 0 (top level): ====================== Level 1: ---------------------- Level 2: ~~~~~~~~~~~~~~~~~~~~~~ Level 3: ^^^^^^^^^^^^^^^^^^^^^^ Level 4 (bottom level): ++++++++++++++++++++++ and the one-line title prefixes: = Document Title (level 0) = == Section title (level 1) == === Section title (level 2) === ==== Section title (level 3) ==== ===== Section title (level 4) ===== The buildroot manual is currenly using the two-line titles, but this has multiple disadvantages: - asciidoc also uses some of the underline symbols for other purposes (like preformatted code, example blocks, ...), which makes it difficult to do mass replacements, such as a planned follow-up patch that needs to move all sections one level down. - it is difficult to remember which level a given underline symbol (=-~^+) corresponds to, while counting = signs is easy. This patch changes all two-level titles to one-level titles in the manual. The bulk of the change was done with the following Python script, except for the level 1 titles (-----) as these underlines are also used for literal code blocks. This patch only changes the titles, no other changes. In adding-packages-directory.txt, I did add missing newlines between some titles and their content. ---------------------------------------------------------------------------- #!/usr/bin/env python import sys import mmap import re for input in sys.argv[1:]: f = open(input, 'r+') f.flush() s = mmap.mmap(f.fileno(), 0) # Level 0 (top level): ====================== = # Level 1: ---------------------- == # Level 2: ~~~~~~~~~~~~~~~~~~~~~~ === # Level 3: ^^^^^^^^^^^^^^^^^^^^^^ ==== # Level 4 (bottom level): ++++++++++++++++++++++ ===== def replace_title(s, symbol, replacement): pattern = re.compile(r'(.+\n)\%s{2,}\n' % symbol, re.MULTILINE) return pattern.sub(r'%s \1' % replacement, s) new = s new = replace_title(new, '=', '=') new = replace_title(new, '+', '=====') new = replace_title(new, '^', '====') new = replace_title(new, '~', '===') #new = replace_title(new, '-', '==') s.seek(0) s.write(new) s.resize(s.tell()) s.close() f.close() ---------------------------------------------------------------------------- Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-05-02 07:47:30 +02:00
==== +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 a br2-external tree).
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]]
manual: use one-line titles instead of two-line titles (trivial) Asciidoc supports two syntaxes for section titles: two-line titles (title plus underline consisting of a particular symbol), and one-line titles (title prefixed with a specific number of = signs). The two-line title underlines are: Level 0 (top level): ====================== Level 1: ---------------------- Level 2: ~~~~~~~~~~~~~~~~~~~~~~ Level 3: ^^^^^^^^^^^^^^^^^^^^^^ Level 4 (bottom level): ++++++++++++++++++++++ and the one-line title prefixes: = Document Title (level 0) = == Section title (level 1) == === Section title (level 2) === ==== Section title (level 3) ==== ===== Section title (level 4) ===== The buildroot manual is currenly using the two-line titles, but this has multiple disadvantages: - asciidoc also uses some of the underline symbols for other purposes (like preformatted code, example blocks, ...), which makes it difficult to do mass replacements, such as a planned follow-up patch that needs to move all sections one level down. - it is difficult to remember which level a given underline symbol (=-~^+) corresponds to, while counting = signs is easy. This patch changes all two-level titles to one-level titles in the manual. The bulk of the change was done with the following Python script, except for the level 1 titles (-----) as these underlines are also used for literal code blocks. This patch only changes the titles, no other changes. In adding-packages-directory.txt, I did add missing newlines between some titles and their content. ---------------------------------------------------------------------------- #!/usr/bin/env python import sys import mmap import re for input in sys.argv[1:]: f = open(input, 'r+') f.flush() s = mmap.mmap(f.fileno(), 0) # Level 0 (top level): ====================== = # Level 1: ---------------------- == # Level 2: ~~~~~~~~~~~~~~~~~~~~~~ === # Level 3: ^^^^^^^^^^^^^^^^^^^^^^ ==== # Level 4 (bottom level): ++++++++++++++++++++++ ===== def replace_title(s, symbol, replacement): pattern = re.compile(r'(.+\n)\%s{2,}\n' % symbol, re.MULTILINE) return pattern.sub(r'%s \1' % replacement, s) new = s new = replace_title(new, '=', '=') new = replace_title(new, '+', '=====') new = replace_title(new, '^', '====') new = replace_title(new, '~', '===') #new = replace_title(new, '-', '==') s.seek(0) s.write(new) s.resize(s.tell()) s.close() f.close() ---------------------------------------------------------------------------- Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-05-02 07:47:30 +02:00
==== +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_OPTS+/+HOST_PERL_FOO_CONF_OPTS+, to specify additional
configure options to pass to the +perl Makefile.PL+ or +perl Build.PL+.
By default, empty.
* +PERL_FOO_BUILD_OPTS+/+HOST_PERL_FOO_BUILD_OPTS+, 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_OPTS+, 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_OPTS+, to specify additional options to
pass to +make pure_install+ or +perl Build install+ in the install step.
By default, empty.