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Recently the Semaphore CI started to fail pretty much constantly due to
GPG key verification fails. After a quick search this is a pretty common
issue with the Ubuntu keyserver in the last month. To make this,
hopefully, a bit more stable, let's use a few different keyservers in
case some of them fail.
lxc-create has been failing to download the image today with
```
+ sudo lxc-create -n buster-amd64 -t download -- -d debian -r buster -a amd64
Setting up the GPG keyring
ERROR: Unable to fetch GPG key from keyserver
lxc-create: buster-amd64: lxccontainer.c: create_run_template: 1617 Failed to create container from template
lxc-create: buster-amd64: tools/lxc_create.c: main: 327 Failed to create container buster-amd64
```
Let's try another keyserver.
Debian unstable is frozen for the Debian 9 release, current development
happens in experimental. After the release, this can be switched back to
master, and the branch set through the `$BRANCH` env variable in the
semaphore config.
This makes the default build much quicker. If people are building systemd for
packaging or actual installation, they probably need to set some more options
anyway (-Ddns-servers=, -Dntp-servers=), so adding -Dman=true is not a big
burden.
For CIs configured locally, -Dman=true is added to restore status quo ante.
We had all kinds of indentation: 2 sp, 3 sp, 4 sp, 8 sp, and mixed.
4 sp was the most common, in particular the majority of scripts under test/
used that. Let's standarize on 4 sp, because many commandlines are long and
there's a lot of nesting, and with 8sp indentation less stuff fits. 4 sp
also seems to be the default indentation, so this will make it less likely
that people will mess up if they don't load the editor config. (I think people
often use vi, and vi has no support to load project-wide configuration
automatically. We distribute a .vimrc file, but it is not loaded by default,
and even the instructions in it seem to discourage its use for security
reasons.)
Also remove the few vim config lines that were left. We should either have them
on all files, or none.
Also remove some strange stuff like '#!/bin/env bash', yikes.
lxc-create in semaphore sometimes fails with
ERROR: Unable to fetch GPG key from keyserver
Which often happens behind proxies. As the default key server is a load
balancer, retry a few times.
Also, cache the container image between runs, and only recreate it when
it is older than a week.
Run build/test in LXC for now, as full nested QEMU is too brittle right
now: https://github.com/semaphoreci/semaphore/issues/37
But this at least runs some tests. It ensures that systemd generally
works in containers, as well as provides some backup results if the main
Ubuntu CI is down.
It should make it easier to tweak them without having access to
SemaphoreCI itself (I'm glad I'm an admin there now but it shouldn't
be necessary to be an admin to add a couple of kludges :-)). More
importantly, changes to the settings will go through review and
be tested before they're applied globally potentially breaking
Semaphore as it happened two days ago.
I'll point Semaphore CI to these scripts once the PR is merged.
