On server is currently used invalid configuration. This commit can be
reverted after merge to master and configuration file update.

Until now it was called somewhat not systematically before every build
and after OpenWRT patching.

This is code that was originally only in Jenkins but it makes sense to
have this prepare stage externally documented and git tracked so I moved
it here.

Empty make argument causes make to build default target. This commit
removes any empty arguments from make calls.

Build is not split to multiple steps and having one central statistics
does not make sense. Also this stat is tracked by external build system
tool (Jenkins).

This also introduces new argument: -jNUM
This is more comfortable way to specify number of parallel jobs.

In configure command there are two major changes. VERSION_REPO is now
set to new path path that is unfortunately board unspecific but as
only one makes sense in new repository arrangement. Second change is
that we no longer build image builder and SDK. Image builder does not
make sense for use. We use updater to build images (medkits). SDK is at
current state useless. It does not contain anything other then compiler,
libraries are missing.

Second change is primarily done because of next change that is going to
be splitting off compile command to few subcommands and making sure that
we build only packages not anything else.

Karel Koci authored 6 years ago and Karel Koci committed 6 years ago

This is more appropriate name as this script now only generates
packages not complete firmware.

Yes grand new and innovative version. Well I had need to be able to not
only roll with branch also to optionally to latest tag only. This in
reality are two scripts. autopkg-branch to replace original pkguato and
autopkg-tag to track latest tagged version.

Previous change to compile_fw broken execution in clean directory
(without git). compile_fw could not been run, not even to display help.

This commit changes how configuration is applied to git tree of OpenWRT.
It is used only when needed and never set to git tree it self.

This introduces new _git function. This function is not required to be
used every time but for `git commit` and `git am` it is necessary to use
it instead of plain git.

For mirrors we are now using `git clone --mirror` istead of `--bare`.
Previous implementation with `clone --bare` and `fetch` is problematic
in case of force pushes. In such case fetch does not update refs that
were force pushed. This change solves that.

This allows smooth execution on systems where git is not configured and
also clearly marks commits that were created by compile_fw and not by
user.

These commands checkout OpenWRT repository with same commits as current
build on repo.turris.cz. You have to specify target branch and board to
make this work.

This command deploys extension of OpenWRT build that can be used to
always build tip of the git branch. It is intended for software
development.