git log reverse and then limit the results to one -


i @ commit on master, , need next commit wrt origin/master. 

git log --ancestry-path --date-order --reverse head..origin/master

or similar git rev-list command gives me right commits, reversed, |head -n 1 , done it.

however, wonder it's possible using 1 process (one git invokation). limiting -1 limits first, , reverses list, not need.

how accomplish this?

i know dag is, know enough graph theory understand why -1 behaves that. i'm asking here not matter of theory, it's matter of using tool used in software development.

i'm 90% confident can't done in single git invocation 2 reasons.

  1. it doesn't they've implemented it. commits have pointers parents, not children, why --max-count (-1) , --skip (which tried bit) run before --reverse. since git's capable of printing in --reverse or not, seems running -1 afterwards should technically feasible, perhaps there's underlying reason it's not. or perhaps considered , decided --reverse | head -n 1 you're doing.

  2. more importantly, you're not guaranteed unique next commit, when using --ancestry-path, picking --reverse -1 ambiguous. here's example --ancestry-path description in git-log docs, head commit e. if you're happy --date-order, it's more of academic issue, dag nature of git makes whole "next commit" concept unsound.

as example use case, consider following commit history:

    d---e-------f    /     \       \   b---c---g---h---i---j  /                     \ a-------k---------------l--m

a regular d..m computes set of commits ancestors of m, excludes ones ancestors of d. useful see happened history leading m since d, in sense “what m have did not exist in d”. result in example commits, except , b (and d itself, of course).

when want find out commits in m contaminated bug introduced d , need fixing, however, might want view subset of d..m descendants of d, i.e. excluding c , k. --ancestry-path option does. applied d..m range, results in:

e-------f  \       \   g---h---i---j                \                 l--m

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