Booting from extlinux.conf is preferred over booting in EFI mode.

This space can be used by single board for u-boot.

The @META suffix is used to expand the metapackage into a list.
apt asks for the dependencies of such a package and adds them to the
package list after this metapackage.

The missing glob resulted in disk images properly
partitioned only for e2kv3 ("e2k" for historical
reasons in ALT), and v4+ ones only got a single
ext4 partition that wouldn't work with current
MCST's Boot code.

os-probe finds loopback devices.

While this argument can only have one "EFI" value.
Thus, the problem of building an image for Raspberry Pi on armh,
where there is no grub-efi, was solved.

extlinux.conf is not tied to the u-boot bootloader and always
needed replace Label with the UUID if the file exist.

Since the main goal for aarch64 and armh for us is Raspberry Pi,
it is always worth creating a fat32 partition for these arches.
At least for now.

For Raspberry Pi needed to build grub-efi + MBR images.

tar2fs does not run in hasher and without qemu. This causes build
problems for an architecture other than the host.

If build is performed on a system with EFI Secure Boot enabled,
then grub will not boot even on EFI without Secure Boot.
This problem is caused by the use of the --removable option, which
is not compatible with option --uefi-secure-boot  the current grub.
Option --uefi-secure-boot is enabled automatically if the system is
booted in EFI Secure Boot mode.

There are use cases when having this common knob would be desirable.

I've long wanted to have this nice helper around in m-p too
but might have set the bar too high.

The "prorper integration" idea was to have the script check
just those pkglists which are relevant for a given image IIRC.

Let's toss it in to begin.

This code started breeding within pkg.in/*/Makefile,
and it was lacking both E2K (as a generic alias,
not just "e2k or e2kv4") _and_ the ability to negate
selection, as in "everywhere but not on any e2k").

Let's fix all of that at once, and parallelize sed
execution as well; my tests with 1000-line file
containing "a b c d@!E2K e@e2k f g@!X86 h i@IA32"
lines show roughly 3x higher CPU load and lower
execution time (~0.3 sec vs ~0.9 sec on 801-PC).

And turn that code snippet into a proper filter
with inline edit capability (I've dropped the exit
trap as failing to mv signals a disaster anyway).

This commit fixes duplication of root device entry in /etc/fstab
and changes LABEL=ROOT entry with the proper one if found.

Apparently this didn't hurt qemu images much though...

This allows one not to hope that only the packages of the desired
loader will be installed.

Should be done this way in the first place it seems.

NB: 07-kernel change breaks multi-kernel setup!

Breaks: 650e92bf

Sometimes REPORT=1 just wasn't passed to make, and the build.log
saved is noisy and harder to compare through diff(1); let's move
the implementation out of the makefile and into a standalone
script so it can be reused like this:

  BUILDDIR=$(sed -rn "s/^mki-image-scripts: export GLOBAL_BUILDDIR='(.*)'$/\1/p" build/build.log
  bin/cleanlog < build/build.log > build/reports/clean.log

See "export GLOBAL_BUILDDIR=" line in the particular log
(grabbing that one from stdin is not exactly trivial though).

Currently, only e2k requires specific disk partitioning.

INITRD_MODULES is reset further down the script.

Fixes: be75d3c3

Changing ROOTFS owner causes a problem:
created image's root directory is owned
by user executing make instead of root.

Changing WORKDIR owner is unnecessary
because it will be removed anyways.

The original commit broke system tar2fs use by accidentally
moving TOPDIR definition into a separate shell execution;
thanks iv@ for spotting and fixing it promptly.
Co-authored-by: Ivan A. Melnikov" <iv@altlinux.org>

...for vm images; BIOS one tested, EFI one untested yet
but will be required for AArch64 VMs it seems.

No sense to "provide" choice when there's none.

...so that umounts can happen reliably.
Reported-by: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>

This one supports multiple kernels (and tweaks boot
labels aiming to simplify target kernel selection
for the CPU at hand) instead of an earlier attempt
to fill in a template.

No need for the template so just drop it.

This was crucial for e2k rescue image supporting
multiple CPU versions but can be useful elsewhere.

The current state made vm images belong to root group,
no reason to not change those to the primary group of
the user building an image.

kpartx -d -s could fail in some circumstances,
make a safety cleanup call more verbose.

Somewhat ARM-like with only the bootloader bits
standing out; Elbrus 2000 firmware can read ext2
and boot the kernel directly.

No need to deduce kernel version again,
just save it in a temporary file.

The main reason to change what worked is
that e2k kernel-image package has Linux bits
named as image-$kver and not vmlinuz-$kver;
the guessing logic taking all of this into
account resulted in non-aesthetic patch.

NB: there's a duplicating script within
    kernel feature; it wasn't easy to avoid
    this and it might differ when handling
    multiple kernels, I didn't think much
    about this now as vm images tend to ship
    with the sole one.

These commits are temporary, so we do not care about stuff like
trailing whitespaces at all.