Changes/DNF-2.0

DNF 2.0

Summary

DNF rebase to version 2.0.

Owner

• Name: Jan Silhan
• Name: Michal Luscon
• Name: Igor Gnatenko
• Email: jsilhan@redhat.com, mluscon@redhat.com, ignatenko@redhat.com
• Release notes owner:

Current status

• Targeted release: Fedora 26
• Last updated: 2016-09-16
• Tracker bug: <will be assigned by the Wrangler>

Detailed Description

DNF-2.0 is the next upcoming major version of DNF package manager. Unfortunately, it brings some incompatibilities with previous version of DNF (DNF-1) which were either needed to preserve compatibility with YUM CLI or where bigger redesigns were needed. A list of identified incompatible changes can be found here[1].

Benefit to Fedora

DNF-2 is the upstream DNF version, the only version actively developed. Currently the upstream contains many user requested features, increased compatibility with yum and over 30 bug fixes. To DNF-1 back porting of patches from upstream is difficult and only critical security and usability fixes will be cherry-picked to Fedora.

Scope

• Proposal owners:
  • complete release notes 
  • deliver DNF-2.0 stack to Rawhide
• Other developers:
  • Owners of 3rd party DNF plugins or components depending on DNF should check and adjust their packages otherwise they may not work with DNF-2.0.
• Release engineering:
  • All release engineering tools that depends on DNF should be tested against DNF-2.0.

Upgrade/compatibility impact

Plugins based on DNF-1 providing commands will abort run of DNF. Any Python script or extension using 5 changed methods in DNF-2 will not work correctly. Components using DNF private Python functions could experience some issues. User or applications calling DNF CLI API can experience differences if any of 2 changed options were used. The code changes are needed for applications affected by mentioned changes. For main applications requiring DNF the patches were provided.

How To Test

• you can install DNF-2 from this COPR repo for testing
• testing scenarios:
  • anaconda installation
  •  upgrade from previous Fedora version
  • core functionality: install, upgrade, remove, repoquery
  •  dnf-plugins: copr, system-upgrade, download
  • third party software: mock, yumex

User Experience

N/A (unaffected)

Dependencies

N/A (not a System Wide Change)

Contingency Plan

• Contingency mechanism:
  • revert to DNF-1.1.x (epoch bump)
  • revert to dnf-plugins-core-0.1.x (epoch bump)
  • revert to dnf-plugins-extras-0.0.x (epoch bump)
  • revert to dnf-plugin-system-upgrade-0.7.x (epoch bump)
  • consequent rollback of already ported components in the table where the change for dnf-2.0 was needed
• Contingency deadline: F26 Alpha Freeze
• Blocks release? Yes

Documentation

documented differences between 1.x and 2.0

Packages that requires dnf, python3-dnf or python2-dnf in Fedora 24

Package	DNF-2.0 compatibility patch	Status
anaconda-core	https://github.com/rhinstaller/anaconda/pull/763	Agreed to merge after DNF release
auter		Not informed
calamares		Not informed
copr-frontend		Not informed
devassistant-core		Not informed
dnf-automatic	In upstream	Compatible
dnf-plugin-spacewalk		Not informed
dnf-plugin-subscription-manager		Not informed
dnf-plugin-system-upgrade	https://github.com/rpm-software-management/dnf-plugins-extras/pull/66	In progress
dnf-yum	In upstream	Compatible
dnfdaemon	https://github.com/timlau/dnf-daemon/pull/6	Merged
etckeeper-dnf		Not informed
fedora-upgrade		Not informed
fontpackages-tools		Not informed
freight-tools		Not informed
freight-tools-agent		Not informed
freight-tools-proxy		Not informed
libreport-python		Not informed
libreport-python3		Not informed
libtaskotron-fedora		Not informed
lorax		Not informed
policycoreutils-devel		Not informed
python-dnf-langpacks		Retired in Fc25
python3-dnf-langpacks		Retired in Fc25
python3-dnf-plugin-system-upgrade	https://github.com/rpm-software-management/dnf-plugins-extras/pull/66	In progress
rhn-client-tools		Not informed
rolekit		Not informed
supermin		Not informed
system-config-language		Not informed