Re: pre-commit hook to reject whitespace

> On Fri, Jun 3, 2011 at 7:58 PM, Neal Kreitzinger<nkreitzinger@gmail.com>  wrote:
>> On 6/3/2011 6:31 PM, Neal Kreitzinger wrote:
>>>
>>> The reference manuals state in the hooks documentation that the pre-commit
>>> hook sample will reject whitespace only changes.  However, the
>>> pre-commit.sample in the 1.7.1 and 1.7.5.4 downloads do not appear to do
>>> this (I'm new to linux scripts).  The appear to only reject non-ascii
>>> filenames.  Does someone have a pre-commit hook example I can use to
>>> reject
>>> whitespace-only changes?  Thanks!
>>>
>> As someone kindly pointed out, the documentation actually says:
>> "The default 'pre-commit' hook, when enabled, catches introduction of lines
>> with trailing whitespaces and aborts the commit when such a line is found."
>>
>> I'm not seeing this functionality in the pre-commit.sample for 1.7.1 or
>> 1.7.5.4.
>
> I've never tried that hook script myself, but it appears to be on the last line:
>     exec git diff-index --check --cached $against --
>
> In particular, the --check option says:
>      Warn if changes introduce trailing whitespace or an indent that
> uses a space before a tab. Exits with non-zero status if problems are
> found. Not compatible with --exit-code.
>