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# A debhelper build system class for building Python Distutils based
# projects. It prefers out of source tree building.
#
# Copyright: © 2008 Joey Hess
# © 2008-2009 Modestas Vainius
# License: GPL-2+
package Debian::Debhelper::Buildsystem::python_distutils;
use strict;
use Cwd ();
use Debian::Debhelper::Dh_Lib qw(error);
use base 'Debian::Debhelper::Buildsystem';
sub DESCRIPTION {
"Python Distutils (setup.py)"
}
sub DEFAULT_BUILD_DIRECTORY {
my $this=shift;
return $this->canonpath($this->get_sourcepath("build"));
}
sub new {
my $class=shift;
my $this=$class->SUPER::new(@_);
# Out of source tree building is prefered.
$this->prefer_out_of_source_building(@_);
return $this;
}
sub check_auto_buildable {
my $this=shift;
return -e $this->get_sourcepath("setup.py");
}
sub not_our_cfg {
my $this=shift;
my $ret;
if (open(my $cfg, $this->get_buildpath(".pydistutils.cfg"))) {
$ret = not "# Created by dh_auto\n" eq <$cfg>;
close $cfg;
}
return $ret;
}
sub create_cfg {
my $this=shift;
if (open(my $cfg, ">", $this->get_buildpath(".pydistutils.cfg"))) {
print $cfg "# Created by dh_auto", "\n";
print $cfg "[build]\nbuild-base=", $this->get_build_rel2sourcedir(), "\n";
close $cfg;
return 1;
}
return 0;
}
sub pre_building_step {
my $this=shift;
my $step=shift;
return unless grep /$step/, qw(build install clean);
if ($this->get_buildpath() ne $this->DEFAULT_BUILD_DIRECTORY()) {
# --build-base can only be passed to the build command. However,
# it is always read from the config file (really weird design).
# Therefore create such a cfg config file.
# See http://bugs.python.org/issue818201
# http://bugs.python.org/issue1011113
not $this->not_our_cfg() or
error("cannot set custom build directory: .pydistutils.cfg is in use");
$this->mkdir_builddir();
$this->create_cfg() or
error("cannot set custom build directory: unwritable .pydistutils.cfg");
# Distutils reads $HOME/.pydistutils.cfg
$ENV{HOME} = Cwd::abs_path($this->get_buildpath());
}
$this->SUPER::pre_building_step($step);
}
sub dbg_build_needed {
my $this=shift;
my $act=shift;
# Return a list of python-dbg package which are listed
# in the build-dependencies. This is kinda ugly, but building
# dbg extensions without checking if they're supposed to be
# built may result in various FTBFS if the package is not
# built in a clean chroot.
my @dbg;
open (CONTROL, 'debian/control') ||
error("cannot read debian/control: $!\n");
foreach my $builddeps (join('', <CONTROL>) =~
/^Build-Depends[^:]*:.*\n(?:^[^\w\n].*\n)*/gmi) {
while ($builddeps =~ /(python[^, ]*-dbg)/g) {
push @dbg, $1;
}
}
close CONTROL;
return @dbg;
}
sub setup_py {
my $this=shift;
my $act=shift;
# We need to to run setup.py with the default python first
# as distutils/setuptools modifies the shebang lines of scripts.
# This ensures that #!/usr/bin/python is used and not pythonX.Y
# Take into account that the default Python must not be in
# the requested Python versions.
# Then, run setup.py with each available python, to build
# extensions for each.
my $python_default = `pyversions -d`;
$python_default =~ s/^\s+//;
$python_default =~ s/\s+$//;
my @python_requested = split ' ', `pyversions -r 2>/dev/null`;
if (grep /^\Q$python_default\E/, @python_requested) {
@python_requested = ("python", grep(!/^\Q$python_default\E/,
@python_requested));
}
my @python_dbg;
my @dbg_build_needed = $this->dbg_build_needed();
foreach my $python (map { $_."-dbg" } @python_requested) {
if (grep /^(python-all-dbg|\Q$python\E)/, @dbg_build_needed) {
push @python_dbg, $python;
}
elsif (($python eq "python-dbg")
and (grep /^\Q$python_default\E/, @dbg_build_needed)) {
push @python_dbg, $python_default."-dbg";
}
}
foreach my $python (@python_requested, @python_dbg) {
if (-x "/usr/bin/".$python) {
# To allow backports of debhelper we don't pass
# --install-layout=deb to 'setup.py install` for
# those Python versions where the option is
# ignored by distutils/setuptools.
if ( $act eq "install" and not
( ($python =~ /^python(?:-dbg)?$/
and $python_default =~ /^python2\.[2345]$/)
or $python =~ /^python2\.[2345](?:-dbg)?$/ )) {
$this->doit_in_sourcedir($python, "setup.py",
$act, @_, "--install-layout=deb");
}
else {
$this->doit_in_sourcedir($python, "setup.py",
$act, @_);
}
}
}
}
sub build {
my $this=shift;
$this->setup_py("build", @_);
}
sub install {
my $this=shift;
my $destdir=shift;
$this->setup_py("install",
"--root=$destdir",
"--no-compile",
"-O0",
@_);
}
sub clean {
my $this=shift;
$this->setup_py("clean", "-a", @_);
# Config file will remain if it was created by us
if (!$this->not_our_cfg()) {
unlink($this->get_buildpath(".pydistutils.cfg"));
$this->rmdir_builddir(1); # only if empty
}
# The setup.py might import files, leading to python creating pyc
# files.
$this->doit_in_sourcedir('find', '.', '-name', '*.pyc', '-exec', 'rm', '{}', ';');
}
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