When you source a file that just does
export FOO=$(bar)
you miss any invalid return codes from "bar" (even under -e) because
bash returns the value of the "export", which is 0
On centos-minimal, we stopped bringing in systemd early and this was
causing dib-init-system to not know what init was available. Since it
did not fail correctly, it lead to confusing errors much later in the
build when service files were not copied correctly. See also
I24ce648485c3d6f3c27ab8f87a638516b3727017
A dib-lint check is added. One minor fixup is in 00-set-apt-sources
(this one is less likely to cause problems). I have run dib-lint over
project-config elements and none use this pattern.
Change-Id: I076c08190d40c315ad6a6d96a3823e9fc52630be
Adding a test function which allows us to use elements to perform
element-specific tests. In order for this to work sanely, also adding
some configuration to our break system so we can assert on negative
tests.
Also adding a test for apt-sources to verify this code actually works.
Change-Id: I378a74255010eca192f5766b653f8a42404be5ea
