Hi Junio, On Tue, May 28, 2013 at 10:04:46AM -0700, Junio C Hamano wrote: > Matthijs Kooijman <matth...@stdin.nl> writes: > > > Did you consider how to implement this? Looking at the code, it seems > > the "deepen" parameter in the wire protocol now means: > > - 0: Do not change anything about the shallowness (i.e., fetch > > everything from the shallow root to the tip). > > - > 0: Create new shallow commits at depth commits below the tip (so > > depth == 1 means tip and one below). > > - INFINITE_DEPTH (0x7fffffff): Remove all shallowness and fetch > > complete history. > > > > Given this, I'm not sure how one can express "fetch the tip and nothing > > below that", since depth == 0 already has a different meaning. > > Doing it "correctly" (in the shorter term) would involve:
Given below suggestion, I take it you don't like what Jonathan proposed (changing the meaning of the deepen parameter in the protocol so that the server effectively decides how to interpret --depth)? > - adding a capability on the sending side "fixed-off-by-one-depth" > to the protocol, and teaching the sending side to advertise the > capability; > > - teaching the sending side to see if the new behaviour to fix > off-by-one is asked by the requestor, and stop at the correct > number of commits, not oversending one more. Otherwise retain > the old behaviour. We can implement these two in current git already, since they only add to the protocol, not break it in an incompatible manner, right? > - teaching the requestor that got --depth=N from the end user to > pay attention to the new capability in such a way that: > > - when talking to an old sender (i.e. without the off-by-one > fix), send N-1 for N greater than 1. Punt on N==1; > > - when talking to a fixed sender, ask to enable the capability, > and send N as is (including N==1). And these should wait for git2, since they change the meaning of the --depth parameter? Or is this change ok for current git as well? What do you mean by "punt" exactly? Show an error to the user, saying only depth >= 2 is supported? > In the longer term, I think we should introduce a better deepening > mechanism. Cf. Even when there will be a better deepening mechanism, the above is still useful (passing --depth=1 serves to get just a single commit without history, which is a distinct usecase from deepening the history of an existing shallow repository). In other words, I think the "improved deepening" and "fixed depth" should be complementary features. Gr. Matthijs -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
