On Tue, Mar 5, 2013 at 10:09 AM, Junio C Hamano <gitster@xxxxxxxxx> wrote: > Heiko Voigt <hvoigt@xxxxxxxxxx> writes: > >> On Mon, Mar 04, 2013 at 03:00:45PM -0800, Junio C Hamano wrote: >>> So if you want a single boolean to toggle between the current >>> behaviour and the other one, it would be --post-order. But you may >>> at least want to consider pros and cons of allowing users to give >>> two separate commands, one for the pre-order visitation (which is >>> the current "command") and the other for the post-order >>> visitation. Being able to run both might turn out to be useful. >> >> I second that. Having a --post-order=<command/script> switch will give >> us much more flexibility. For ease of use we could allow --post-order >> without command to switch the meaning of the main command. >> >> So a final solution would have these switches: >> >> git submodule foreach ... [--pre-order[=<command>]] [--post-order[=<command>]] [<command>] >> >> If only --pre-order without argument is given the command will be >> executed pre-order. If only --post-order the command will be executed >> post-order. If both are given its an error and so on... >> >> There are some combinations we would need to catch as errors but this >> design should allow a step by step implementation: >> >> 1. just the --post-order switch >> 2. --post-order with argument switch >> 3. --pre-order (including argument) for symmetry of usage > > Yeah, I think I can agree with that direction, and Eric's patch > could be that first step of the three-step progression, without > painting us into a corner we cannot get out of when we want to > advance to 2 and 3 later. > > I was more interested in the design aspect and I didn't look at the > actual patch text, though. Would these be the correct behaviors of Heiko's implementation? git submodule foreach # Empty command, pre-order git submodule foreach --pre-order # Same behavior git submodule foreach --post-order # Empty command, post-order git submodule foreach 'frotz' # Do 'frotz' pre-order in each submodule git submodule foreach --post-order 'frotz' # Do 'frotz' post-order in each submodule git submodule foreach --pre-order='frotz' --post-order='shimmy' # Do 'frotz' pre-order and 'shimmy' post-order in each submodule git submodule foreach --post-order='shimmy' 'frotz' # Invalid usage of the command git submodule foreach --post-order --pre-order # It should not be too hard to have this functionality affect the --include-super command as well. And would it be worth it to abstract this traversal to expose it to other commands, such as 'update', to consolidate the code some? I think Imram was doing something like that in his post. - Eric -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html