Unset GRUB_SAVEDEFAULT if / or /boot is in btrfs or f2fs partition. This avoids the error "sparse file not allowed" at boot time. Btrfs and f2fs do not support saving default entry in grub.
- Scenario: *keepDistribution* is true, and the existing file contains
a GRUB_DISTRIBUTION line **followed** by a commented-out GRUB_DISTRIBUTION
line.
- In that case, the commented-out line would change the flag back to
False, and we'd end up writing a second GRUB_DISTRIBUTION line at the end.
Prevent that: the flag can only go to "True" and then stays there.
Editorial: If your grub configuration would have tripped this up, then
you're doing something wrong. Clean up the configuration file first.
- If we update the line, then GRUB_DISTRIBUTION has been set
- If we don't update the line (e.g. because of *keepDistribution*)
then a comment doesn't count as "have seen that line".
This means that if we get to the end of the file, with only commented-
out GRUB_DISTRIBUTION lines, and *keepDistribution* is set, then we'll
still write a distribution line -- because otherwise it's not set at all.
- Previous fix would erase the distribution information (using an
empty string to flag 'preserve existing GRUB_DISTRIBUTION lines'),
but that is fragile. A distro might set that, and yet **not**
set a GRUB_DISTRIBUTION line, in which case it would end up with
a setup without any GRUB_DISTRIBUTION set.
- When a GRUB_DISTRIBUTION line is found, **then** check if it should
update the line or not. This way, we have a suitable distribution
to write if no GRUB_DISTRIBUTION is found at all.
The plymouthcfg Calamares module is optional. Distributions which
write filesystems with a full plymouth configuration won't even
want to use it (see plymouthcfg docs).
However, now grubcfg depends on plymouthcfg to run because
the globalstorage value to trigger setting 'splash' in grub,
is set in the plymouthcfg module.
Just check for plymouth existence separately in the grub module.
Fixes ea1c8a0e5d
* add rd.luks.uuid to GRUB_CMDLINE (fixes unbootable system with dracut --nohostonly, and doesn't affect any other initramfs generators)
* typo
* only write rd.luks.uuid line if dracut is present, and leave other initramfs generators alone :D
* add missing = operator
