Add InputApi.AffectedSourceFile() and custom filtering support.

Add InputApi.AffectedSourceFile() and custom filtering support.

TEST=none
BUG=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=17975

[M-A Ruel, 2009-06-09 19:44:00]

Ok I think I'm there now. It supports on a per call black/white list override
and uses regexp for both lists. I think it's just the right level of flexibility
and InputApi stays immutable.

[Jói Sigurðsson, 2009-06-09 20:28:53]

LGTM with nits

http://codereview.chromium.org/119365/diff/1011/1012
File presubmit_canned_checks.py (right):

http://codereview.chromium.org/119365/diff/1011/1012#newcode71
Line 71: text files to be submitted.
'text files' -> 'source files'

http://codereview.chromium.org/119365/diff/1011/1013
File presubmit_support.py (right):

http://codereview.chromium.org/119365/diff/1011/1013#newcode142
Line 142: DEFAULT_WHITE_LIST = [
Prepend the name with _ (this and the next constant list) to make it clear
they're private (see http://www.corp.google.com/eng/doc/pyguide.xml#Naming)

[M-A Ruel, 2009-06-09 20:35:22]

On 2009/06/09 20:28:53, Jói wrote:
> http://codereview.chromium.org/119365/diff/1011/1013
> File presubmit_support.py (right):
> 
> http://codereview.chromium.org/119365/diff/1011/1013#newcode142
> Line 142: DEFAULT_WHITE_LIST = [
> Prepend the name with _ (this and the next constant list) to make it clear
> they're private (see http://www.corp.google.com/eng/doc/pyguide.xml#Naming)

I disagree. The use case in chromium would be:

black_list = input_api.DEFAULT_BLACK_LIST + [r".*\bskia[\\\/].*", ...]
f = lambda x: input_api.FilterSourceFile(x, black_list=black_list)
CheckChangeHasNoCR(input_api, output_api, f)