2013-12-11 21:26:36 +01:00
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// -*- mode:doc; -*-
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// vim: set syntax=asciidoc:
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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
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=== Infrastructure for Python packages
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2013-12-11 21:26:36 +01:00
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This infrastructure applies to Python packages that use the standard
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Python setuptools mechanism as their build system, generally
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recognizable by the usage of a +setup.py+ script.
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[[python-package-tutorial]]
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|
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
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==== +python-package+ tutorial
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2013-12-11 21:26:36 +01:00
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First, let's see how to write a +.mk+ file for a Python package,
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with an example :
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------------------------
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01: ################################################################################
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02: #
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03: # python-foo
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04: #
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05: ################################################################################
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06:
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07: PYTHON_FOO_VERSION = 1.0
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2014-08-06 04:41:52 +02:00
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08: PYTHON_FOO_SOURCE = python-foo-$(PYTHON_FOO_VERSION).tar.xz
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2013-12-11 21:26:36 +01:00
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09: PYTHON_FOO_SITE = http://www.foosoftware.org/download
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10: PYTHON_FOO_LICENSE = BSD-3c
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11: PYTHON_FOO_LICENSE_FILES = LICENSE
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12: PYTHON_FOO_ENV = SOME_VAR=1
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13: PYTHON_FOO_DEPENDENCIES = libmad
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14: PYTHON_FOO_SETUP_TYPE = distutils
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15:
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16: $(eval $(python-package))
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------------------------
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On line 7, we declare the version of the package.
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On line 8 and 9, we declare the name of the tarball (xz-ed tarball
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recommended) and the location of the tarball on the Web. Buildroot
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will automatically download the tarball from this location.
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On line 10 and 11, we give licensing details about the package (its
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license on line 10, and the file containing the license text on line
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11).
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On line 12, we tell Buildroot to pass custom options to the Python
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+setup.py+ script when it is configuring the package.
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On line 13, we declare our dependencies, so that they are built
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before the build process of our package starts.
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On line 14, we declare the specific Python build system being used. In
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this case the +distutils+ Python build system is used. The two
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supported ones are +distutils+ and +setuptools+.
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Finally, on line 16, we invoke the +python-package+ macro that
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generates all the Makefile rules that actually allow the package to be
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built.
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[[python-package-reference]]
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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
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==== +python-package+ reference
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2013-12-11 21:26:36 +01:00
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As a policy, packages that merely provide Python modules should all be
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named +python-<something>+ in Buildroot. Other packages that use the
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Python build system, but are not Python modules, can freely choose
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their name (existing examples in Buildroot are +scons+ and
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+supervisor+).
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In their +Config.in+ file, they should depend on +BR2_PACKAGE_PYTHON+
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so that when Buildroot will enable Python 3 usage for modules, we will
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be able to enable Python modules progressively on Python 3.
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The main macro of the Python package infrastructure is
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+python-package+. It is similar to the +generic-package+ macro. It is
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also possible to create Python host packages with the
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+host-python-package+ macro.
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Just like the generic infrastructure, the Python infrastructure works
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by defining a number of variables before calling the +python-package+
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or +host-python-package+ macros.
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All the package metadata information variables that exist in the
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xref:generic-package-reference[generic package infrastructure] also
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exist in the Python infrastructure: +PYTHON_FOO_VERSION+,
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+PYTHON_FOO_SOURCE+, +PYTHON_FOO_PATCH+, +PYTHON_FOO_SITE+,
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+PYTHON_FOO_SUBDIR+, +PYTHON_FOO_DEPENDENCIES+, +PYTHON_FOO_LICENSE+,
|
2014-07-16 22:23:59 +02:00
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+PYTHON_FOO_LICENSE_FILES+, +PYTHON_FOO_INSTALL_STAGING+, etc.
|
2013-12-11 21:26:36 +01:00
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Note that:
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* It is not necessary to add +python+ or +host-python+ in the
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+PYTHON_FOO_DEPENDENCIES+ variable of a package, since these basic
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dependencies are automatically added as needed by the Python
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package infrastructure.
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* Similarly, it is not needed to add +host-setuptools+ and/or
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+host-distutilscross+ dependencies to +PYTHON_FOO_DEPENDENCIES+ for
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setuptools-based packages, since these are automatically added by
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the Python infrastructure as needed.
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One variable specific to the Python infrastructure is mandatory:
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* +PYTHON_FOO_SETUP_TYPE+, to define which Python build system is used
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by the package. The two supported values are +distutils+ and
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+setuptools+. If you don't know which one is used in your package,
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look at the +setup.py+ file in your package source code, and see
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whether it imports things from the +distutils+ module or the
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+setuptools+ module.
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A few additional variables, specific to the Python infrastructure, can
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optionally be defined, depending on the package's needs. Many of them
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are only useful in very specific cases, typical packages will
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therefore only use a few of them, or none.
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* +PYTHON_FOO_ENV+, to specify additional environment variables to
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pass to the Python +setup.py+ script (for both the build and install
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steps). Note that the infrastructure is automatically passing
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several standard variables, defined in +PKG_PYTHON_DISTUTILS_ENV+
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(for distutils target packages), +HOST_PKG_PYTHON_DISTUTILS_ENV+
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(for distutils host packages), +PKG_PYTHON_SETUPTOOLS_ENV+ (for
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setuptools target packages) and +HOST_PKG_PYTHON_SETUPTOOLS_ENV+
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(for setuptools host packages).
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|
2014-09-27 21:32:45 +02:00
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* +PYTHON_FOO_BUILD_OPTS+, to specify additional options to pass to the
|
2013-12-11 21:26:36 +01:00
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Python +setup.py+ script during the build step. For target distutils
|
2014-09-27 21:32:45 +02:00
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packages, the +PKG_PYTHON_DISTUTILS_BUILD_OPTS+ options are already
|
2013-12-11 21:26:36 +01:00
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passed automatically by the infrastructure.
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2014-09-27 21:32:41 +02:00
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* +PYTHON_FOO_INSTALL_TARGET_OPTS+, +PYTHON_FOO_INSTALL_STAGING_OPTS+,
|
2014-09-27 21:32:39 +02:00
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+HOST_PYTHON_FOO_INSTALL_OPTS+ to specify additional options to pass
|
2014-07-16 22:23:59 +02:00
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to the Python +setup.py+ script during the target installation step,
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the staging installation step or the host installation,
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respectively. Note that the infrastructure is automatically passing
|
2014-09-27 21:32:40 +02:00
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some options, defined in +PKG_PYTHON_DISTUTILS_INSTALL_TARGET_OPTS+
|
2014-09-27 21:32:41 +02:00
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or +PKG_PYTHON_DISTUTILS_INSTALL_STAGING_OPTS+ (for target distutils
|
2014-09-27 21:32:39 +02:00
|
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packages), +HOST_PKG_PYTHON_DISTUTILS_INSTALL_OPTS+ (for host
|
2014-09-27 21:32:40 +02:00
|
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distutils packages), +PKG_PYTHON_SETUPTOOLS_INSTALL_TARGET_OPTS+ or
|
2014-09-27 21:32:41 +02:00
|
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+PKG_PYTHON_SETUPTOOLS_INSTALL_STAGING_OPTS+ (for target setuptools
|
2014-09-27 21:32:39 +02:00
|
|
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packages) and +HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS+ (for host
|
2014-07-16 22:23:59 +02:00
|
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setuptools packages).
|
2013-12-11 21:26:36 +01:00
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|
2014-03-05 23:04:42 +01:00
|
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* +HOST_PYTHON_FOO_NEEDS_HOST_PYTHON+, to define the host python
|
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|
interpreter. The usage of this variable is limited to host
|
2014-12-19 08:12:33 +01:00
|
|
|
packages. The two supported value are +python2+ and +python3+. It
|
2015-07-14 17:17:20 +02:00
|
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|
will ensure the right host python package is available and will
|
2014-03-05 23:04:42 +01:00
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invoke it for the build. If some build steps are overloaded, the
|
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right python interpreter must be explicitly called in the commands.
|
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|
2013-12-11 21:26:36 +01:00
|
|
|
With the Python infrastructure, all the steps required to build and
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|
|
install the packages are already defined, and they generally work well
|
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|
for most Python-based packages. However, when required, it is still
|
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|
|
possible to customize what is done in any particular step:
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* By adding a post-operation hook (after extract, patch, configure,
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build or install). See xref:hooks[] for details.
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* By overriding one of the steps. For example, even if the Python
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infrastructure is used, if the package +.mk+ file defines its own
|
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|
+PYTHON_FOO_BUILD_CMDS+ variable, it will be used instead of the
|
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|
default Python one. However, using this method should be restricted
|
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|
|
to very specific cases. Do not use it in the general case.
|
2016-02-22 10:20:59 +01:00
|
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|
|
2016-05-31 17:03:41 +02:00
|
|
|
[[scanpypi]]
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|
==== Generating a +python-package+ from a PyPI repository
|
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|
If the Python package for which you would like to create a Buildroot
|
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|
package is available on PyPI, you may want to use the +scanpypi+ tool
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located in +support/scripts+ to automate the process.
|
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|
You can find the list of existing PyPI packages
|
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|
|
https://pypi.python.org[here].
|
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|
+scanpypi+ requires Python's +setuptools+ package to be installed on
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|
your host.
|
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|
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|
|
When at the root of your buildroot directory just do :
|
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|
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|
|
|
|
-----------------------
|
|
|
|
|
./support/script/scanpypi foo bar -o package
|
|
|
|
|
-----------------------
|
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|
|
This will generate packages +python-foo+ and +python-bar+ in the package
|
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|
|
folder if they exist on https://pypi.python.org.
|
|
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|
Find the +external python modules+ menu and insert your package inside.
|
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|
|
Keep in mind that the items inside a menu should be in alphabetical order.
|
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|
Please keep in mind that you'll most likely have to manually check the
|
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|
|
package for any mistakes as there are things that cannot be guessed by
|
|
|
|
|
the generator (e.g. dependencies on any of the python core modules
|
|
|
|
|
such as BR2_PACKAGE_PYTHON_ZLIB). Also, please take note that the
|
|
|
|
|
license and license files are guessed and must be checked. You also
|
|
|
|
|
need to manually add the package to the +package/Config.in+ file.
|
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If your Buildroot package is not in the official Buildroot tree but in
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a +BR2_EXTERNAL+ tree, use the -o flag as follows:
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-----------------------
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./support/script/scanpypi foo bar -o other_package_dir
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-----------------------
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This will generate packages +python-foo+ and +python-bar+ in the
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+other_package_directory+ instead of +package+.
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Option +-h+ will list the available options:
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-----------------------
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./support/script/scanpypi -h
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-----------------------
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2016-02-22 10:20:59 +01:00
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[[python-package-cffi-backend]]
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==== +python-package+ CFFI backend
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C Foreign Function Interface for Python (CFFI) provides a convenient
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and reliable way to call compiled C code from Python using interface
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declarations written in C. Python packages relying on this backend can
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be identified by the appearance of a +cffi+ dependency in the
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+install_requires+ field of their +setup.py+ file.
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Such a package should:
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* add +python-cffi+ as a runtime dependency in order to install the
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compiled C library wrapper on the target. This is achieved by adding
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+select BR2_PACKAGE_PYTHON_CFFI+ to the package +Config.in+.
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------------------------
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config BR2_PACKAGE_PYTHON_FOO
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bool "python-foo"
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select BR2_PACKAGE_PYTHON_CFFI # runtime
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------------------------
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* add +host-python-cffi+ as a build-time dependency in order to
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cross-compile the C wrapper. This is achieved by adding
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+host-python-cffi+ to the +PYTHON_FOO_DEPENDENCIES+ variable.
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------------------------
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################################################################################
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#
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# python-foo
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#
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################################################################################
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...
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PYTHON_FOO_DEPENDENCIES = host-python-cffi
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$(eval $(python-package))
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------------------------
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