OFFLINE UPDATES USING PACKAGEKIT AND SYSTEMD
This functionality adds the offline updates feature to PackageKit as
described in http://freedesktop.org/wiki/Software/systemd/OSUpgrade
What do do if you're a backend:
* If the transaction_flags contain PREPARE then download all the
metadata and packages for the transaction, but don't actually apply
the transaction.
What to do if you're a frontend:
* If the /var/lib/PackageKit/prepared-update file exists then offer
the user to:
- _Install updates and restart
- _Suspend
rather than just:
- _Suspend
* If the user clicks "Install updates and restart" then execute
pkexec /usr/libexec/pk-trigger-offline-update and then restart the
computer the usual way.
The next reboot will happen, the updates will be installed, and the
computer will be restarted again.
The /var/lib/PackageKit/prepared-update file will be automatically
removed if the offline update succeeded, but the offline update will
only be attempted once.
The /var/lib/PackageKit/offline-update-competed file will be created
once the pk-offline-update program has been run by systemd. For failure,
the file will contain the following:
"""
[PackageKit Offline Update Results]
Success=false
ErrorCode=missing-gpg-signature
ErrorDetails="The GPG signature 0xDEADBEEF is not installed"
"""
For success, the file will contain the following:
"""
[PackageKit Offline Update Results]
Success=true
Packages=upower;0.9.16-1.fc17;x86_64;updates,zif;0.3.0-1.fc17;x86_64;updates
"""
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TESTING OFFLINE UPDATES
* Ensure powertop and colorhug-client are installed and the system is
othewise up to date. Ensure PackageKit 0.8.1-3 or later is installed.
* Downgrade the powertop and colorhug-client packages on your system so
that you have exactly two updates when you do "pkcon get-updates"
* Download the new powertop update with:
pkcon --only-download update powertop
* Observe there are no PolicyKit dialogs shown as the command completes
* Ensure /var/lib/PackageKit/prepared-update contains just the powertop
package on a single line
[You can also use 'pkcon offline-get-prepared' to do the same thing]
* Download the new colorhug-client update with:
pkcon --only-download update colorhug-client
* Ensure /var/lib/PackageKit/prepared-update contains both powertop and
colorhug-client on two lines
* Run pkexec /usr/libexec/pk-trigger-offline-update and confirm that
the system-update symlink exists on '/'.
[You can also use 'pkcon offline-trigger' to do the same thing]
* Check that /var/lib/PackageKit/offline-update-action is "reboot"
* Observe that pkexec ran without showing a PolicyKit dialog
* Run sudo PK_OFFLINE_UPDATE_TEST=1 /usr/libexec/pk-offline-update and
observe that the two updates are applied
* Confirm that /var/lib/PackageKit/prepared-update has been deleted
* Confirm that /var/lib/PackageKit/offline-update-competed exists
and no error messages have been logged.
[You can also use 'pkcon offline-status' to do the same thing]
* Downgrade powertop and colorhug-client again, and do:
pkcon --only-download update powertop colorhug-client
pkexec /usr/libexec/pk-trigger-offline-update
* Reboot, and observe that the updates are applied in the special
system-update.service with plymouth going from 0% to 100%
* Confirm that the system is rebooted into a running system that has
has the updates applied.
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