Don't list debian-stretch-build and debian-stretch-titan as dependencies
anymore, now that docker_images_require finds them automatically.
Related: OS#4564
Change-Id: I3cb6b693f3dd9df84fb29c0217bb3dae454cc18f
Set the OSMO_TTCN3_BRANCH build argument from ttcn3-*/Dockerfile from
the environment variable of the same name, so it can be changed when
building the images with 'make' or './jenkins.sh'.
Dockerfiles that do not have a OSMO_TCCN3_BRANCH build arg produce a
warning. But this is also the case with Dockerfiles that don't have an
USER build arg, and avoiding the warning would only be possible with a
much more complex patch.
Change-Id: If2c312ff9206d1613fc19f41bd088c9aad523684
Obsoleted by docker_images_require(). The top-level Makefile had the
following drawbacks:
* it was not maintained: many targets were missing, and some of the
existing ones did not build anymore
* make targets have the same names as the folders, so if they are not
listed in the Makefile, it will assume that the target has been built
already (prone to making mistakes)
Extend README.md to describe how to run tests, container caching, how
container dependencies are resolved now and the reasoning for doing
it that way instead of using a top-level Makefile.
Related: OS#3268
Change-Id: Id18a9a7a70f85127e6f6c9447d71764018bdb4ff
Oliver Smith
Pau Espin
Harald Welte