Some .install plugins does not require that machine ID is set such as
20-grubby.install for Fedora and 50-depmod.install.
To support such plugins to run without valid machine-id, this commit
makes the following change:
* if /etc/machine-id is missing or empty, create temporary directory
and set its path to BOOT_DIR_ABS,
* run the .install helpers with KERNEL_INSTALL_MACHINE_ID environment
variable that'd be empty if /etc/machine-id is missing or empty.
This may be useful for installing kernel for e.g. stateless systems
which initialize machine-id while booting the systems.
bash implements process substitution using /dev/fd/N (this is documented
in man bash). We'd like kernel-install to work in chrooted RPM
scriptlets without /dev.
We can use here-strings instead. bash uses temporary files to implement
those.
Will be used by rpm-ostree (and likely lorax) to suppress
RPM->kernel->%posttrans->dracut runs, and basically everything
else this script is doing.
I'll also likely change the `kernel.spec` to respect this as well.
With this change kernel-install will now first look for an existing kernel
installation in /efi, /boot and /boot/efi. If none is found, /efi is used if it
is a mount point, otherwise /boot/efi if it is one. If nothing of that worked
/boot is used without further checking.
This means /boot should be the default unless something was installed before or
something else was explicitly mounted.
If 'kernel-install' is called as 'installkernel' it will be compatible with the
syntax used by the kernel's build system.
This means it can be called by doing 'make install' in a kernel build
directory, if the correct symlink has been installed (which we don't do by
default yet).
[Edit harald@redhat.com: removed basename and use shift]
Do the depmod in the kernel-install hooks, so hooks can produce/install
kernel modules and be part of the depmod.
Also move the basic boot loader entry creation and removal to a
plugin script.
If PRETTY_NAME is not defined in /etc/os-release, fallback to
PRETTY_NAME="Linux $KERNEL_VERSION".
Add documentation for everything in the man page.
- Consistent use of $VAR vs ${VAR}
- Consistent use of && vs 'if'
- Add error checking to some places
- Consistent error messages ("Can't" vs "Cannot", etc.)
- Function declarations at the top
- Miscellaneous adjustments
The wildcard matching the default loader entry should always be able to point to
the same machine.
So instead of sorting by <distribution>-<kernel-version>-<machine-id>
we better sort by <machine-id>-<kernel-version>.
