Modular object-orientied buildsystem implementation (try 2).

Major changess:

* Dh_Buildsystem_Option dropped and Dh_Buildsystem_Chdir functionality
  partitially merged into Dh_Buildsystem_Basic. Dh_Buildsystem_Bases.pm
  renamed to Dh_Buildsystem_Basic.pm to match classname.
* *_impl() ditched completely. Previous {configure,build,test,install,clean}_impl()
  renamed to just configure(), build(), test(), install(), clean() instead.
  Added pre_action($action) and post_action($action) hooks instead which are called
  by Dh_Buildsystems::buildsystems_do().
* Builddir is handled via mkdir_builddir(), doit_in_buildddir(), clean_builddir()
  methods which buildsystems should call directly. Removed get_top* method, added
  get_rel2builddir_path().
* is_buildable() method renamed to is_auto_buildable() to reflect its
  purpose more.
* ::perl_makefile renamed to ::perl_makemaker and which is based on ::makefile
  now. MakeMaker hack moved from ::makefile to ::perl_makemaker where it belongs
  (thanks for the tip).
* Dh_Buildsystems refactored into a simple perl module rather than OO class and
  simplified a bit.
* @BUILDSYSTEMS and is_auto_buildable() modified to 100% match historical order.

TODO: user documentation (e.g. DH_AUTO_BUILDDIRECTORY and DH_AUTO_BUILDSYSTEM
environment variables and common dh_auto_* options (--buildsystem and --builddirectory)).

Current plugin inheritance hierarchy is like this:

    Buildsystem::perl_build -> Dh_Buildsystem_Basic  <- Buildsystem::python_distutils
                                      ^
                                      |
                              Buildsystem::makefile  <- Buildsystem::perl_makemaker
                              ^       ^           ^
                             /        |             \
       Buildsystem::autotools  Buildsystem::cmake   Buildsystem::python_distutils

Signed-off-by: Modestas Vainius <modestas@vainius.eu>

1 files changed, 21 insertions, 28 deletions

diff --git a/Debian/Debhelper/Buildsystem/python_distutils.pm b/Debian/Debhelper/Buildsystem/python_distutils.pm
index 2e7eacb..a69b36f 100644
--- a/Debian/Debhelper/Buildsystem/python_distutils.pm
+++ b/Debian/Debhelper/Buildsystem/python_distutils.pm
@@ -9,54 +9,47 @@ package Debian::Debhelper::Buildsystem::python_distutils;
 
 use strict;
 use Debian::Debhelper::Dh_Lib;
-use Debian::Debhelper::Dh_Buildsystem_Bases;
-use base 'Debian::Debhelper::Dh_Buildsystem_Option';
+use base 'Debian::Debhelper::Dh_Buildsystem_Basic';
 
 sub DESCRIPTION {
 	"support for building Python distutils based packages"
 }
 
-sub is_buildable {
-	return -e "setup.py";
+sub is_auto_buildable {
+	my $self=shift;
+	my $action=shift;
+
+	# Handle build install clean; the rest - next class
+	if (grep(/^\Q$action\E$/, qw{build install clean})) {
+		return -e "setup.py";
+	}
+	return 0;
 }
 
-sub get_builddir_option {
+sub setup_py {
 	my $self=shift;
+	my $act=shift;
+
 	if ($self->get_builddir()) {
-		return "--build-base=". $self->get_builddir();
+		unshift @_, "--build-base=" . $self->get_builddir();
 	}
-	return;
+	doit("python", "setup.py", $act, @_);
 }
 
-# XXX JEH the default for all these methods is to do nothing successfully.
-# So either this, or those default stubs, need to be removed.
-sub configure_impl {
-	# Do nothing
-	1;
-}
-
-sub build_impl {
+sub build {
 	my $self=shift;
-	doit("python", "setup.py", "build", @_);
-}
-
-# XXX JEH see anove comment
-sub test_impl {
-	1;
+	$self->setup_py("build", @_);
 }
 
-sub install_impl {
+sub install {
 	my $self=shift;
 	my $destdir=shift;
-
-	doit("python", "setup.py", "install", 
-	     "--root=$destdir",
-	     "--no-compile", "-O0", @_);
+	$self->setup_py("install", "--root=$destdir", "--no-compile", "-O0", @_);
 }
 
-sub clean_impl {
+sub clean {
 	my $self=shift;
-	doit("python", "setup.py", "clean", "-a", @_);
+	$self->setup_py("clean", "-a", @_);
 	# The setup.py might import files, leading to python creating pyc
 	# files.
 	doit('find', '.', '-name', '*.pyc', '-exec', 'rm', '{}', ';');