On Thu, Aug 21, 2014 at 10:39 PM, Matthias Urlichs <matth...@urlichs.de> wrote: > What I would like to have, instead, is a version of shallow cloning which > cuts off not at a pre-determined depth, but at a given branch (or set of > branches). In other words, given > > +-J--K (packaged) > / / > +-F--G--H----I (clean) > / / > A---B---C---D---E (upstream) > > a command "git clone --shallow-until upstream $REPO" (or however that would > be named) would create a shallow git archive which contains branches > packaged+clean, with commits FGHIJK. In contrast, with --single-branch and > --depth 4 I would get CGHIJK, which isn't what I'd want.
I would imagine a more generic mechanism "git clone --shallow-rev=<rev> $REPO" where you could pass anything that "git rev-list" can accept (maybe more restricted, and some verification required). --shallow-rev could be repeated. So in your case it could be "git clone --shallow-rev="^A" $REPO". We could even maybe turn --depth into a generic thing that is accepted by rev-list so that it could be easily combined with other rev-list options (--shallow-rev and --depth are mutually exclusive). > As I have not spent too much time with the git sources lately (as in "None > at all"), some pointers where to start implementing this would be > appreciated, assuming (a) this has a reasonable chance of landing in git and > (b) nobody beats me to it. ;-) I'd like to see this implemented. You are not the first one complaining about the (lack of) flexibility of --depth. If you have time, I may be able to support (I should not take on another topic given my many ongoing/unfinished topics). The starting point is upload-pack.c. And GIT_TRACE env variable will be your friend. Search for get_shallow_commits(). There the function is supposed to traverse down from want_obj and set/unset SHALLOW/NOT_SHALLOW flags properly. SHALLOW flag should be set right before the cut-out commit (e.g. B and F if you want to cut A out). NOT_SHALLOW flags could be used to remove shallow lines in the receiver repo. If you traverse past an existing shallow point in the client (this is the fetch/pull case, not clone), then you should set NOT_SHALLOW so the client knows to remove that point from their $GIT_DIR/shallow. Once you set these properly, the rest should work. -- Duy -- 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
