GitLab

Replace `hostname` and `whoami` by method calls

See merge request !383

Remove checking if gpg knows import-filter

See merge request !384

Fix verifying encapsulated messages

Closes #502

See merge request !387

I don't want to change the code style rubocop flags, because it is
foreign code copied verbatim. Future comparison or patching would be
harder if we changed the style.

This monkeypatches mail-gpg to restore the use of the unaltered raw
source of the relevant email part.
This code was removed in
<https://github.com/jkraemer/mail-gpg/commit/5fded41ccee4a58f848a2f8e7bd53d11236f8984>
for yet unknown reasons.

Delete dead code.

See merge request !385

It wasn't even used in the original commit? o_O

We require a version of gpg that does know about import-filters since
v4.0. So this code is superfluous.

This gets rid of the dependency on "coreutils". A lightweight but
unnecessary dependency.

This reduces the (lightweight, but sometimes overlooked) dependency on a
"hostname" executable, which really is not necessary.

Enable using ActiveRecords's rake tasks.

See merge request !381

This also fixes the strange error about "default_env" when repeatedly
running `rake db:init`

gemspec: sort dependencies alphabetically

See merge request !380

Add gpgme dependency again

See merge request !379

It was removed by accident with the last commit.

Remove bigdecimal.

See merge request !378

It's not requried anymore and loading v1.4 results in an error with ruby
3.0 (`bigdecimal-1.4.4/bigdecimal.so: undefined symbol: rb_check_safe_obj)`).

CI: changelog: fetch our repository

See merge request !375

The changelog job requires to fetch the latest state of the repository,
otherwise the result of this check might not be correct.

Up until now, 'origin' was fetched, which points, by default, to the
remote repository a local checkout was cloned from, initially.

This works for our repository, but might fail for forks, depending on
when they were forked and if they were updated in the meantime.

This commit ensures the correct repository is fetched. Besides this, the
amount of data fetched is limited.

Ref !374

x-add-key: handle binary attachments

Closes #495

See merge request !372

No master, but main

See merge request !370

README: we're at 4.x now!

See merge request !371

README: headline: drop version

See merge request !368

ruby 2.1 support is gone

See merge request !369

CI: Transition to rules, instead of deprecated only/except clauses

Closes #469

See merge request !365

spec_helper: save simplecov output as HTML

See merge request !366

In most cases, relying on rules instead of only/except clauses offers
more possibilites.

This commit changes the CI pipeline configuration as follows:

- Pipelines are executed with the Ruby rspec jobs for all branches,
except if an associated MR exists.

- In this case, create a so called "detached pipeline" with all, the
Ruby rspec and MR-specific, jobs.

- Pipelines aren't executed for tags at all, as the relevant commits are
tested in any case.

This prevents duplicated pipelines and therefore wasted resources.

Besides this, the CHANGELOG job result gets more reliable: up until now,
the result of it was timing-sensitive, as it queried the GitLab API to
search for an associated MR, to get the target branch to compare
against. This would fail in case a branch was pushed, the job started
but a MR only created some time afterwards, as there would be no target
branch, yet.

Now, as the job is run within the "detached pipeline" of a MR, and
relies on the MR-specific target branch exposed via a variable, this job
isn't timing-sensitive anymore.

To ensure these changes do work as expected, they were extensively
tested in a forked repo.

Closes #469

Ref !287
Ref 2f779414

Collected changes for v4.0

Closes #286, #380, #174, #374, #411, and #422

See merge request !367