I'm working on fixing the issues in the gpg plugin.   I just committed some 
changes but would like a bit of discussion before finalizing some of it.

MGPG-2 - Allow the selection of a particular signature
I added a keyname parameter (-Dkeyname=foo) etc... which can be used.   It 
maps directly to the gpg --local-user flag.    That should solve that one.

MGPG-1 - Prompt for pass phrase if it is not supplied
This one is a bit nasty.   I basically have done two changes:
1) made passphrase non-required.   If passphrase is not specified, gpg will 
automatically ask for it.  We really don't have to do anything.   The 
DOWNSIDE is gpg will ask for it for every artifact it signs.

2) I've added a useAgent parameter (default to false, should that be true?) 
to pass the --use-agent of --no-use-agent flag to gpg.   The agent can ask 
for the passphrase and cache it (outside of maven) so it only is asked for 
once.   (this solves my use case of NO passphrase stored on disk anywhere, 
plaintext or not, yet still only ask once)


The questions I have are:
1) Is allowing GPG to ask for the passphrase for every artifact acceptable?   
If not, we'll need to ask ahead of time and cache it.   However, what 
happens in multi-module builds?   Where can we store it so we don't have 
to ask again?  (I suppose we could abuse System.setProperty(...) or 
something.   Ick.)  

2) The comment on MGPG-1 says "the plugin should detect that Maven is 
running in batch mode, and not prompt in that case".   In that case, 
what's supposed to happen?   gpg really needs a passphrase.   Should it 
fail?   Should it just not sign anything?

Thanks!
-- 
J. Daniel Kulp
Principal Engineer
IONA
P: 781-902-8727    C: 508-380-7194
[EMAIL PROTECTED]
http://www.dankulp.com/blog

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