tree a02b202c4799185e8db49a1668865ecf193de17b
parent 19bed3399de12654481f8072cab60cb4b1796d8a
author Thomas Wolf <thomas.wolf@paranor.ch> 1611449829 +0100
committer Matthias Sohn <matthias.sohn@sap.com> 1612737150 -0500

GPG: support git config gpg.program

Add it to the GpgConfig. Change GpgConfig to load the values once only.
Add a parameter to the GpgObjectSigner interface's operations to pass
in a GpgConfig. Update CommitCommand and TagCommand to pass the value
to the signer. Let the signer decide whether it can actually produce
the wanted signature type (openpgp or x509).

No behavior change. But this makes it possible to implement different
signers that might support x509 signatures, or use gpg.program and
shell out to an external GPG executable for signing.

Change-Id: I427f83eb1ece81c310e1cddd85315f6f88cc99ea
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>