Disallow pushing of new trailing whitespace

[Simon Marlow]

On 22/08/13 12:32, Austin Seipp wrote:
> This seems acceptable IMO. The general working conventions already are
> to separate whitespace and/or tab changes from a commit containing
> actual content. If you ./validate cleanly, but the server rejects the
> push for whitespace, adding an extra commit on top to clean up the
> affected files seems very sensible (it's simple to 'untabify' and
> eliminate trailing white space in most editors these days, so I imagine
> this isn't really going to cost you a lot of time.)

You still have to validate the new commit, so it costs you at least 20 
mins, which is a lot.

> I also add bonus
> points for the fact the server will reject it unless you clean up *all*
> affected files you touched, so things can't slip by. This is how the tab
> check works now, and it does deal with a 'range' of commits where later
> commits eliminate tabs introduced in earlier ones.
>
> We'd also have to introduce the concept of git into ./validate for this
> to work (and add the ability to specify a commit range for stuff like
> this,) but a basic implementation may not be difficult, looking at the
> pre-receive script.

Checking everything in 'git rev-list origin..' is probably good enough.

Cheers,
	Simon



> Alternatively, these could be pre-commit hooks in the developer
> repository, but I believe you have to opt into that. Maybe worth putting
> on the wiki, though.
>
>
>
> On Thu, Aug 22, 2013 at 2:33 AM, Simon Marlow <marlowsd at gmail.com
> <mailto:marlowsd at gmail.com>> wrote:
>
>     On 20/08/13 12:21, Geoffrey Mainland wrote:
>
>         Would be nice to have. How about a third hook that disallows commits
>         that include whitespace-only changes unless *all* changes are
>         whitespace-only? ;)
>
>
>     The problem with these kind of commit-time checks is that you only
>     find out the problem *after* you've validated your nicely polished
>     commits. If we're going to add more checks on commits they should be
>     done by validate (yes I know that's not at all trivial, but it's not
>     impossible either).
>
>     Cheers,
>              Simon
>
>
>
>
>         Geoff
>
>         On 08/20/2013 10:59 AM, Jan Stolarek wrote:
>
>             Right now we have a git hook that prevents pushing a file
>             containing tabs, unless that file had them already (in other
>             words: no new files with tabs in our repos). I propose to
>             add similar hook for trailing whitespaces. Herbert says he
>             can implement that. What do others think? Would you find
>             that useful or problematic?
>
>             Janek
>
>
>         _________________________________________________
>         ghc-devs mailing list
>         ghc-devs at haskell.org <mailto:ghc-devs at haskell.org>
>         http://www.haskell.org/__mailman/listinfo/ghc-devs
>         <http://www.haskell.org/mailman/listinfo/ghc-devs>
>
>
>
>     _________________________________________________
>     ghc-devs mailing list
>     ghc-devs at haskell.org <mailto:ghc-devs at haskell.org>
>     http://www.haskell.org/__mailman/listinfo/ghc-devs
>     <http://www.haskell.org/mailman/listinfo/ghc-devs>
>
>
>
>
> --
> Regards,
> Austin - PGP: 4096R/0x91384671