Add post_processing code to update copyright year automatically.

Add post processing code to update copyright year automatically.

This simplifies contributor's life by not having to do this kind of bureaucracy.

Update pending_manager_test.py to be more forward compatible.

TEST=lots

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=82588

[M-A Ruel, 2011-04-21 19:37:36]

Depends on http://codereview.chromium.org/6891003/

[Dirk Pranke, 2011-04-21 20:26:13]

This feels like a lot of scaffolding to implement what is essentially one
~20-line function with a single regexp. Do you have other post-processing that
you plan to do already queued up?

Otherwise I'd be tempted to just land the core callback logic and the single
function, and wait until there are other post-processors to introduce the
general framework.

Separately, it would be nice if there was a post-process command that was
invocable from gcl/git-cl for people that wanted to land things by hand. 

I'm leery of putting to much logic only in the commit queue. I think we should
be pushing as much of it into the base modules in depot_tools as possible.

WDYT?

All that aside, the patch looks fine, except I would probably make the one
change suggested below.

http://codereview.chromium.org/6880115/diff/1/projects.py
File projects.py (right):

http://codereview.chromium.org/6880115/diff/1/projects.py#newcode51
projects.py:51: datetime.date.today().year)
I think it's a little weird to (a) use a CONSTANT notation to describe an object
and (b) pass the method function of a constant object as the callback below.

How about something more like:

def chromium_copyright_updater(args):
  mangler = foo()
  mangler.process(args)

instead?

[M-A Ruel, 2011-04-21 20:51:05]

I went a bit berserk when writing the unit test until I found out I had miswrote
"(c) 2010" for "2010 (c)"...

Simplified the code accordingly.

[Dirk Pranke, 2011-04-21 21:55:57]

LGTM. Much easier to follow. Thanks!