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rootfs presented a special case when there is no resulting
directory at all as it gets merged with the target subprofile
by design.
Still those features adding only rootfs scripts need to depend
on it but this resulted in an attempt to process a missing subdir.
This is brought back to sanity now.
Its support was dropped in mkimage some time ago
since xorriso semantics changed quite considerably
and the tweak that was done here is now performed
out-of-box thus no longer needed.
That sub/stage2/install2 was somewhat clumsy actually as it looked
like a hierarchical thing while being a substitution thing:
generic stage2 would get put in place renamed as install2.
This could only get worse with hierarchical features which have
already been both requested and considered for quite a time,
and "stage2 at install2" reads much more naturally.
There were heaps of "if type -t git" there already;
it wasn't an unintentional mishap but rather a moderate
copy-paste to get the use cases, and now these seem to
have essentially settled.
So time to scrap some dups.
NB: the scripts in the generated profile can't rely on
the contents of the metaprofile (these need to be able
to work in standalone case either), so a bit of crap
still lurks there.
Yes, mkimage-profiles is now able to build VM disk images.
So far the support is pretty basic:
- a single hard drive image with a single partition/FS
- only stock root password is configurable
- LILO is hardwired as a bootloader
The resulting images tend to boot under qemu/kvm though.
Please see doc/vm.txt for the warning regarding additional
privileges and setup required. This was started back in
February but I still hoped to avoid sudo/privileged helper
(and libguestfs is almost as undistributable as can be)...
Thanks:
- http://blog.quinthar.com/2008/07/building-1gb-bootable-qemu-image-using.html
- Alexey Morarash who reworked that as https://github.com/tuxofil/linsygen
- led@, legion@, vitty@, aen@ for providing advice and inspiration
This further refines the modular build by making
metadata being a clearly separated feature rather
than having to rely on runtime tests, and also by
moving the code which cares for kernel bits of base
installation (.base list) in a feature of its own.
There's more to it but let's get the ball rolling first.
The initial work covered live images but missed an installer bit
(thus notes and slideshow were missing in install2) while forgetting
to put branding packages into base list (thus kindly making these
available for *manual* installation sometime after, ouch).
As was noted by Alexey Shabalin in libosinfo context,
current ALT Linux images tend to lack ISO9660 metadata
-- which they did have back in the day of Master 2.4.
Please note that the data collection occurs this way
due to mkimage's config.mk resetting the values to be
empty; this was worked around by using another config
file, $(BUILDDIR)lib/iso.mk, and including it later
but that would require a separate target with per-target
CONFIG variable which isn't elegant at all given the need
to actually build up the metadata set.
So the variables were changed (to be more readable anyways)
and then proxied back to BOOT_*. This might be cleaned up
some day after the inclusion order is tweaked or mkimage
defaults get set-if-unset-yet (?=).
As too many things started duplicating between distros proper
and (e.g. corresponding) LiveCDs, it became apparent that a class
of entities which end up working for THE_USER (not a sysadmin,
and not a developer, just a Linux user) is in need.
So THE_KMODULES will power installed basesystem and live image,
while THE_PACKAGES, THE_LISTS and THE_GROUPS will participate
in building those.
Actually there's an added duplication in the form of the
test that was previously missing in pkg.in/lists/Makefile
-- that has to be done properly when it's clear how.
This fully omits pkg/lists/.base generation in environments
that won't make use of it.
The features might get copy-pasted (or even copied-and-pruned)
when initialized; there's an unneccessary duplication of the
function name in the line adding it to FEATURES list, thus
prone to being forgotten and causing some havoc later on.
It was wrong in the first place but tackling this with some
double-colon rules ran into terminality issues, and further
tortures were considered unneccessary.
The current solution isn't perfect (no completely transparent
function name registration upon corresponding target being called)
but at least it is an improvement...
We've got some parts of it in build-distro feature,
and some went to dev feature for no real reason.
But a bare installer might go without package base,
and LiveCDs other than live-builder might find local
repository useful given aufs2 root overlay.
Now the overall scheme is more straightforward:
- a distro:
+ asks that a package repo be included
+ cares to further add the packages to it
- a repo feature:
+ pulls in sub/main for it to happen
+ provides genbasedir script to create repo metadata
+ supplements live feature with repo configuration
If you make distro/live-builder.iso, the result is an image
containing almost everything (short of actual full enough
repository) to rebuild itself. It will attempt to configure
eth0 with DHCP and reach http://ftp.altlinux.org for packages.
RAM requirements start with 2Gb, self-build is accomplished
on a 4Gb host with "make CLEAN=1 distro/live-builder.iso".
Packages required for "make distro/syslinux.iso" get included.
(some due fixups all over the place too)
This is quite a large-scale change since mkimage-profiles got used to
baking distributions over the last year, and virtual environments are
quite different, so e.g. image.in/Makefile had to be split in two with
the main part of it moved into features.in/iso/lib/.
Short overview:
- features.in/Makefile: lib/ support
(supporting VE images requires dynamic modifications
to image.in/Makefile before starting the build;
the most natural way to achieve that seems to use
features mechanism along with makefile include dir)
- packaging format related part moved into features.in/pack
(should be better prepared for diversity either)
- features.in/iso renamed to features.in/build-distro
- features.in/ve renamed to features.in/build-ve
+ NB: these could not be merged as e.g. features.in/build
due to completely different script hooks
- lib/image.mk renamed to lib/build.mk
- image, config, log postprocessing moved downstream
- added a sort of a topping in the form of lib/sugar.mk
- assorted style fixups (like ifeq usage)
- clean.mk: reliability fix (the problem was observed by Oleg Ivanov
and me too but finally it did get the attention quantum)
- reviewed, updated and extended docs
+ QUICKSTART: should be[come] a step-by-step guide
(thanks Leo-sp50 for prodiving feedback)
