[OE-core] [PATCH v3 0/5] systemd patches

[Jonas Bonn]

Changed in v3:
- parameterize preset-file installation location (as suggested in patch
  review)

Changed in v2:
- address patchtest warnings:
  - include sign-offs on patches
  - include License-Update tag on patch that makes licensing change
- dropped patch implementing brute-force removal of unit files installed
  by systemd into /etc
- reworked the systemd-conf patch to restore the installation of the
  base systemd configuration files


**********

These patches make some modifications to systemd with the long-term goal
of being able to run OE in systemd's "stateless" configuration.
"Stateless" boils down to building an image with empty /etc and /var
directories so that volatile (tmpfs) filesystems can be mounted there;
this requires that the system subsequently be able to populate these
directories dynamically, which systemd mostly takes care of if things
are done right.

In these patches:
i)    Don't include machine-id in writable images so that systemd can run
its first-boot machinery
ii)  Allow systemd to dynamically enable services and populate
/etc/systemd/system via the presets mechanism

There's a long way to go to get to a working "stateless" configuration.
Getting to a "volatile" system (just empty /var) should be easier and
I'll post patches moving things in that direction shortly.

/Jonas

Jonas Bonn (5):
  systemd: do not create machine-id
  systemd-conf: simplify creation of machine-specific configuration
  systemd: create preset files instead of installing in image
  systemd-systemctl-native: simplify and support preset-all
  rootfs-postcommands: call preset-all for read-only-rootfs

 meta/classes/rootfs-postcommands.bbclass      |  8 +++
 meta/classes/systemd.bbclass                  | 33 ++++++------
 meta/recipes-core/systemd/systemd-conf.bb     | 53 ++++++++-----------
 .../systemd/systemd-systemctl/systemctl       | 36 +++----------
 meta/recipes-core/systemd/systemd_239.bb      | 17 +++---
 5 files changed, 62 insertions(+), 85 deletions(-)

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2.19.1