alpm_db_update now supports updating multiple databases at once the so
called parallel download feature. This requires an adjustment of the
alpm_db_update function call.

alpm_db_search now returns an int and set's pm_errno when the result is
-1 add a todo as this needs to be handled later

The current pyalpm implementation has no proper refcounting for Package
objects. Add refcount handling for the Database Object in the Package
model and Decref when the package object goes out of scope.

The current pyalpm implementation does not handle proper refcounting
which means the alpm_handle was never freed otherwise accessing an
object when the Handle goes out of scope leads to segfaults.

This means everything needs to keep a reference to the pyalpm Handle
object for every object created from it. The database object now
receives a Handle and increases the refcount for it to stop it from
being removed by the Python garbage collector.

Signed-off-by: Jelle van der Waa <jelle@archlinux.org>

Eli Schwartz via arch-projects authored Jan 18, 2019 and Jelle van der Waa committed Oct 21, 2019

alpm_sync_newversion becomes alpm_sync_get_new_version and changes
behavior slightly. See for details:
https://git.archlinux.org/pacman.git/commit/?id=e9d91a688d1a2ebe58e8a895853debf745a529cf

Add a repr for the alpm.DB class for interactive usage.

db_list is not free'd which leads to memory being leaked.

-Werror can be enabled by including pyconfig.h in db, package,
transaction.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

API CHANGE:
 * The usedelta property of class Handle is no longer a boolean
   but a float property called deltaratio.

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

The error string from libalpm is included in the formatted
string obtained from the exception.

Also pkgcache is now a property of databases.