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#!/usr/bin/perl -w

=head1 NAME

dh_auto_install - automatically runs make install or similar

=cut

use strict;
use Debian::Debhelper::Dh_Lib;
use Cwd;

=head1 SYNOPSIS

B<dh_auto_install> [S<I<debhelper options>>] [S<B<--> I<params>>]

=head1 DESCRIPTION

dh_auto_install is a debhelper program that tries to automatically install
built files. If there's a Makefile and it contains a "install" target,
then this is done by running make (or MAKE, if the environment variable is
set). If there is a setup.py or Build.PL, it is used.

The files are installed into debian/<package>/ if there is only one binary
package to act on. In the multiple binary package case, the files are
instead installed into debian/tmp/, and should be moved from there to the
appropriate package build directory using L<dh_install(1)> or
L<dh_movefiles(1)>.

DESTDIR is used to tell make where to install the files. 
If the Makefile was generated by MakeMaker from a Makefile.PL, it will
automatically set PREFIX=/usr too, since such Makefiles need that.

This is intended to work for about 90% of packages. If it doesn't work, or
tries to use the wrong clean target, you're encouraged to skip using
dh_auto_install at all, and just run make install manually.

=head1 OPTIONS

=over 4

=item B<--> I<params>

Pass "params" to the program that is run. These can be used to suppliment
or override the any standard parameters that dh_auto_clean passes.

=back

=cut

init();

my $destdir;
if (@{$dh{DOPACKAGES}} > 1) {
	$destdir="debian/tmp";
}
else {
	$destdir=tmpdir($dh{MAINPACKAGE});
}
$destdir=cwd()."/".$destdir;

if (-e "Makefile" || -e "makefile" || -e "GNUmakefile") {
	$ENV{MAKE}="make" unless exists $ENV{MAKE};
	my @params="DESTDIR=$destdir";
	# Special case for MakeMaker.
	if (-e "Makefile.PL") {
		push @params, "PREFIX=/usr";
	}
	foreach my $target (qw{install}) {
		# Use make -n to check to see if the target would do
		# anything. There's no good way to test if a target exists.
		my $ret=`$ENV{MAKE} -s -n $target 2>/dev/null`;
		chomp $ret;
		if (length $ret) {
			doit($ENV{MAKE}, $target,
				@params,
				@{$dh{U_PARAMS}});
			last;
		}
	}
}
elsif (-e "setup.py") {
	doit("python", "setup.py", "install", 
		"--root=$destdir",
		"--no-compile", "-O0",
		@{$dh{U_PARAMS}});
}
elsif (-e "Build.PL" && -e "Build") {
	doit("perl", "Build", "install", "destdir=$destdir",
		"create_packlist=0", @{$dh{U_PARAMS}});
}

=head1 SEE ALSO

L<debhelper(7)>

This program is a part of debhelper.

=head1 AUTHOR

Joey Hess <joeyh@debian.org>

=cut