This patch allows giving a list of items for the conditionals in package
lists. For example, it's possible to specify some packages for more than one
architecture in the same conditional block:
package01
#if ARCHITECTURE i386 amd64
package02
package03
#endif
package04
where package01 and package04 are available for all architectures, but
package02 and package03 are available only for i386 and amd64 architectures.
This patch adds support for simple conditionals in package lists. For
example, to limit a package to i386 only:
foo
#if ARCHITECTURE i386
package-only-in-i386
#endif
bar
Any variable that beings in LH_ can be expanded:
#if MODE ubuntu
package-only-in-ubuntu
#endif
Nesting of conditionals is not supported. If the variable to be expanded
does not exist, the conditional is false.
Without this, a modified version of the (say) "gnome" list inside
chroot_package-lists would be completely ignored when installing binary
packagelists.
This patch installs (almost) all chroot packages by queueing the package
names into a single file and then installing that. It depends on my
previous patch to install local packages by using an APT mirror.
This speeds up image build causes even greater speedups once more packages
adopt triggers.
(Packages installed by debconf preseeding are not touched, nor are packages
installed by tasks.)
This patch modifies chroot_sources to build a small APT repo of the
local-packages and use that for local package installation instead of
"dpkg -i". This has a few advantages:
* Removes the true ugliness that is "dpkg -i *.deb && apt-get install -f".
This not only is slow and brittle, it causes scary "dpkg dependency
error" messages to appear in build logs.
* We can (ie. not implemented here) move to installing all the packages
from:
- lh_chroot_packages (ie. ${LH_PACKAGES})
- lh_chroot_local-packages (ie. config/chroot_local-packages/*.deb)
- lh_chroot_local-packageslists
- lh_chroot_packages-lists
- lh_chroot_linux-image
.. in one shot. This would primarily improve speed as we would not keep
invoking ${LH_APT}, and package installations can share triggers and
suchlike -- installing a custom live-initramfs via local packages
currently costs an additional "update-initramfs -u" call.
It would also fix a number of obscure dependency cases, such as the one
documented in #475739, and--if the user is using aptitude--may even
result in better resolution choices.
* Removes some messy and somewhat brittle code in lh_chroot_linux-image
that edgecases a local live-initramfs.
The disadvantages are:
* If local packages are being used and we are building in a chroot, we
must refresh the sources list and rebuild the repo before building the
binary images. (However, before this patch, we had to do this anyway if
the binary mirrors were different from the chroot ones.)
* We must add a little hack to the minimal hook to detect whether we are
using local packages and not remove apt-utils (which creates the
repository in lh_chroot_sources) if that is the case -- we cannot simply
use "Install_package" inside lh_chroot_sources as we are not guaranteed
to have working APT data because the minimal hook deliberately removes
them!
This patch disables the installation of "Recommends:" packages whilst
obtaining build utilities such as 'syslinux'.
It has three benefits:
* Doesn't waste time installing useless packages whilst building.
* Keeps the "binary chroot" clean - packages leak into the the live system
on a rebuild.
* Makes the behaviour of Install_Package more predictable and independent
of the chroot's APT configuration.
This means that /isolinux/isolinux.bin and /boot/grub/stage2_eltorito are
not included in md5sum files anymore as intended. It also prevents a
strange and verbose warning from appearing in build logs.
Daniel Baumann
Tiago Bortoletto Vaz
Chris Lamb