summaryrefslogtreecommitdiff
path: root/Debian/Debhelper/Dh_Buildsystems.pm
blob: 8713aab44fbaf28974d7b7bd0f5495ebb3c1adfe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
# A module for loading and managing debhelper build system classes.
# This module is intended to be used by all dh_auto_* programs.
#
# Copyright: © 2009 Modestas Vainius
# License: GPL-2+

package Debian::Debhelper::Dh_Buildsystems;

use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;
use File::Spec;

use base 'Exporter';
our @EXPORT=qw(&buildsystems_init &buildsystems_do &load_buildsystem &load_all_buildsystems);

# Historical order must be kept for backwards compatibility. New
# build systems MUST be added to the END of the list.
our @BUILDSYSTEMS = (
	"autoconf",
	"perl_makemaker",
	"makefile",
	"python_distutils",
	"perl_build",
	"cmake",
	"ant",
);

my $opt_buildsys;
my $opt_sourcedir;
my $opt_builddir;
my $opt_list;
my $opt_parallel;

sub create_buildsystem_instance {
	my $system=shift;
	my %bsopts=@_;
	my $module = "Debian::Debhelper::Buildsystem::$system";

	eval "use $module";
	if ($@) {
		error("unable to load build system class '$system': $@");
	}

	if (!exists $bsopts{builddir} && defined $opt_builddir) {
		$bsopts{builddir} = ($opt_builddir eq "") ? undef : $opt_builddir;
	}
	if (!exists $bsopts{sourcedir} && defined $opt_sourcedir) {
		$bsopts{sourcedir} = ($opt_sourcedir eq "") ? undef : $opt_sourcedir;
	}
	if (!exists $bsopts{parallel}) {
		$bsopts{parallel} = $opt_parallel;
	}
	return $module->new(%bsopts);
}

# Similar to create_build system_instance(), but it attempts to autoselect
# a build system if none was specified. In case autoselection fails, undef
# is returned.
sub load_buildsystem {
	my $system=shift;
	my $step=shift;
	if (defined $system) {
		my $inst = create_buildsystem_instance($system, @_);
		return $inst;
	}
	else {
		# Try to determine build system automatically
		for $system (@BUILDSYSTEMS) {
			my $inst = create_buildsystem_instance($system, @_);
			if ($inst->check_auto_buildable($step)) {
				return $inst;
			}
		}
	}
	return;
}

sub load_all_buildsystems {
	my $incs=shift || \@INC;
	my (%buildsystems, @buildsystems);

	for my $inc (@$incs) {
		my $path = File::Spec->catdir($inc, "Debian/Debhelper/Buildsystem");
		if (-d $path) {
			for my $module_path (glob "$path/*.pm") {
				my $name = basename($module_path);
				$name =~ s/\.pm$//;
				next if exists $buildsystems{$name};
				$buildsystems{$name} = create_buildsystem_instance($name, @_);
			}
		}
	}

	# Standard debhelper build systems first
	for my $name (@BUILDSYSTEMS) {
		error("standard debhelper build system '$name' could not be found/loaded")
		    if not exists $buildsystems{$name};
		push @buildsystems, $buildsystems{$name};
		delete $buildsystems{$name};
	}

	# The rest are 3rd party build systems
	for my $name (keys %buildsystems) {
		my $inst = $buildsystems{$name};
		$inst->{thirdparty} = 1;
		push @buildsystems, $inst;
	}

	return @buildsystems;
}

sub buildsystems_init {
	my %args=@_;
	
	my $max_parallel=0;

	# Available command line options
	my %options = (
	    "D=s" => \$opt_sourcedir,
	    "sourcedirectory=s" => \$opt_sourcedir,
	
	    "B:s" => \$opt_builddir,
	    "builddirectory:s" => \$opt_builddir,

	    "S=s" => \$opt_buildsys,
	    "buildsystem=s" => \$opt_buildsys,

	    "l" => \$opt_list,
	    "list" => \$opt_list,

	    "max-parallel:i" => \$max_parallel,
	);
	$args{options}{$_} = $options{$_} foreach keys(%options);
	Debian::Debhelper::Dh_Lib::init(%args);
	set_parallel($max_parallel);
}

sub set_parallel {
	my $max=shift;

	if (exists $ENV{DEB_BUILD_OPTIONS}) {
		# Parse parallel=n tag
		my $n;
		foreach my $opt (split(/\s+/, $ENV{DEB_BUILD_OPTIONS})) {
			$n = $1 if $opt =~ /^parallel=(\d+)$/;
		}
		if (defined $n && $n > 0) {
			if ($max && $n < $max) {
				$opt_parallel = $n;
			}
			else {
				$opt_parallel = $max;
			}
		}
		else {
			# Invalid value in the parallel tag. Disable.
			$opt_parallel = 1;
		}
	}
	else {
		$opt_parallel = 1;
	}
}

sub buildsystems_list {
	my $step=shift;

	# List build systems (including auto and specified status)
	my ($auto, $specified);
	for my $inst (load_all_buildsystems()) {
		my $is_specified = defined $opt_buildsys && $opt_buildsys eq $inst->NAME();
		if (! defined $specified && defined $opt_buildsys && $opt_buildsys eq $inst->NAME()) {
			$specified = $inst->NAME();
		}
		elsif (! defined $auto && ! $inst->{thirdparty} && $inst->check_auto_buildable($step)) {
			$auto = $inst->NAME();
		}
		printf("%-20s %s", $inst->NAME(), $inst->DESCRIPTION());
		print " [3rd party]" if $inst->{thirdparty};
		print "\n";
	}
	print "\n";
	print "Auto-selected: $auto\n" if defined $auto;
	print "Specified: $specified\n" if defined $specified;
	print "No system auto-selected or specified\n"
		if ! defined $auto && ! defined $specified;
}

sub buildsystems_do {
	my $step=shift;

	if (!defined $step) {
		$step = basename($0);
		$step =~ s/^dh_auto_//;
	}

	if (grep(/^\Q$step\E$/, qw{configure build test install clean}) == 0) {
		error("unrecognized build step: " . $step);
	}

	if ($opt_list) {
		buildsystems_list($step);
		exit 0;
	}

	my $buildsystem = load_buildsystem($opt_buildsys, $step);
	if (defined $buildsystem) {
		$buildsystem->pre_building_step($step);
		$buildsystem->$step(@_, @{$dh{U_PARAMS}});
		$buildsystem->post_building_step($step);
	}
	return 0;
}

1