These unit-tests cover operations via both PGP providers:
built-in `openpgp` and external `gpg`.
Next step is to run these tests for gpg1 & gpg2
as separate entities.
Init is actually never called and I have no clue why it is there if it is
not called.
Take this opportunity to introduce a New function which only does the
helper lookup and panics iff that fails. Panic may be a bit too aggressive,
but seems the most certain way to get out of not finding a suitable gpg1
binary.
Newer versions of debian and ubuntu come with gpg pointing to gpg2.
We can currently only handle gpg1 CLIs though. Luckily the old gpg is still
available in the package gnupg1 (providing bin/gpg1).
As a bit of a stop-gap, until #657 can be resolved properly, we'll detect
the version of bin/gpg. If it is unsuitable we'll fall back and try
bin/gpg1. If neither is found to be suitable the signer/verifier will
not work.
Same applies to gpgv/gpgv1.
Andrey Smirnov
Harald Sitter