Re: Advices to imlement update hook

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Hello,

On Wed, Feb 9, 2011 at 6:05 PM, Jeff King <peff@xxxxxxxx> wrote:
> On Wed, Feb 09, 2011 at 05:51:24PM +0100, Francis Moreau wrote:
>
>> >>>    git diff-tree <oldref> <newref> -- ^b || exit 1
>> >>>
>> >>> but it doesn't work.
>> >>
>> >>   git diff-tree --quiet <oldref> <newref> -- b
>> >
>> > should do it; it sets the exit code.
>>
>> but does that work if a commit modify b/ and another directory ?
>
> No, it just looks for commits that modified b. There is currently no way
> to specify a path to say "commit that did not modify b". You need to
> check the output of:
>
>  git rev-list | git diff-tree --stdin -m --name-only
>
> which should list all paths modified by all commits. And then you can
> either blacklist or whitelist as appropriate (note that the names can be
> quoted; you might want to look at the "-z" option and do your
> list-checking in perl).
>
>> > But don't you also want to inspect all commits between oldref and newref?
>>
>> Yes I want to inspect all commits in the range.
>
> see above.
>
>> > Someone could have modified the directory, and then reverted the
>> > modification in a later commit. If these commits arrive in a single push,
>> > the above code wouldn't notice this.
>>
>> I agree but I thought that git diff-tree would list all changes made
>> between the 2 refs.
>
> Between the two endpoints. It won't even look at the commits in the
> middle, so as long as a later middle commit reverts the change of an
> earlier middle commit, the endpoints won't be affected.

Oh, I see. I undestand why the git-rev-list is needed now.

Thanks for your help !
-- 
Francis
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