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1 # A debhelper build system class for building Python Distutils based
2 # projects. It prefers out of source tree building.
3 #
4 # Copyright: © 2008 Joey Hess
5 #            © 2008-2009 Modestas Vainius
6 # License: GPL-2+
7
8 package Debian::Debhelper::Buildsystem::python_distutils;
9
10 use strict;
11 use Cwd ();
12 use Debian::Debhelper::Dh_Lib qw(error);
13 use base 'Debian::Debhelper::Buildsystem';
14
15 sub DESCRIPTION {
16         "Python Distutils (setup.py)"
17 }
18
19 sub DEFAULT_BUILD_DIRECTORY {
20         my $this=shift;
21         return $this->_canonpath($this->get_sourcepath("build"));
22 }
23
24 sub new {
25         my $class=shift;
26         my $this=$class->SUPER::new(@_);
27         # Out of source tree building is prefered.
28         $this->enforce_out_of_source_building(@_);
29         return $this;
30 }
31
32 sub check_auto_buildable {
33         my $this=shift;
34         return -e $this->get_sourcepath("setup.py");
35 }
36
37 sub not_our_cfg {
38         my $this=shift;
39         my $ret;
40         if (open(my $cfg, $this->get_buildpath(".pydistutils.cfg"))) {
41                 $ret = not "# Created by dh_auto\n" eq <$cfg>;
42                 close $cfg;
43         }
44         return $ret;
45 }
46
47 sub create_cfg {
48         my $this=shift;
49         if (open(my $cfg, ">", $this->get_buildpath(".pydistutils.cfg"))) {
50                 print $cfg "# Created by dh_auto", "\n";
51                 print $cfg "[build]\nbuild-base=", $this->get_build_rel2sourcedir(), "\n";
52                 close $cfg;
53                 return 1;
54         }
55         return 0;
56 }
57
58 sub pre_building_step {
59         my $this=shift;
60         my $step=shift;
61
62         return unless grep /$step/, qw(build install clean);
63
64         # --build-base can only be passed to the build command. However,
65         # it is always read from the config file (really weird design).
66         # Therefore create such a cfg config file.
67         if ($this->get_buildpath() ne $this->DEFAULT_BUILD_DIRECTORY()) {
68                 not $this->not_our_cfg() or
69                     error("cannot set custom build directory: .pydistutils.cfg is in use");
70                 $this->mkdir_builddir();
71                 $this->create_cfg() or
72                     error("cannot set custom build directory: unwritable .pydistutils.cfg");
73                 # Distutils reads $HOME/.pydistutils.cfg
74                 $ENV{HOME} = Cwd::abs_path($this->get_buildpath());
75         }
76 }
77
78 sub setup_py {
79         my $this=shift;
80         my $act=shift;
81         $this->doit_in_sourcedir("python", "setup.py", $act, @_);
82 }
83
84 sub build {
85         my $this=shift;
86         $this->setup_py("build", @_);
87 }
88
89 sub install {
90         my $this=shift;
91         my $destdir=shift;
92         $this->setup_py("install",
93                 "--root=$destdir",
94                 "--no-compile",
95                 "-O0",
96                 "--install-layout=deb",
97                 @_);
98 }
99
100 sub clean {
101         my $this=shift;
102         $this->setup_py("clean", "-a", @_);
103
104         # Config file will remain if it was created by us
105         if (!$this->not_our_cfg()) {
106                 unlink($this->get_buildpath(".pydistutils.cfg"));
107                 $this->rmdir_builddir(1); # only if empty
108         }
109         # The setup.py might import files, leading to python creating pyc
110         # files.
111         $this->doit_in_sourcedir('find', '.', '-name', '*.pyc', '-exec', 'rm', '{}', ';');
112 }
113
114 1