Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> writes: > @@ -773,6 +773,14 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix) > return 1; > continue; > } > + if (opt_with_value(arg, "--abbrev-len", &arg)) { > + unsigned long v; > + if (!git_parse_ulong(arg, &v)) > + return 1; > + int len = abbrev_length_for_object_count(v); > + printf("%d\n", len); > + continue; > + } Instead of exposing this pretty-much "test-only" feature as a new option to t/helper/test-tool, I think it is OK, if not even better, to have it in rev-parse proper like this patch does. I however have a mildly strong suspition that people would expect "rev-parse --abbrev-len=<num>" to be a synonym of "--short=<num>" As this is pretty-much a test-only option, perhaps going longer but more descriptive would make sense? git rev-parse --compute-abbrev-length-for <object-count> may be an overkill, but something along those lines. Oh by the way, the code has decl-after-stmt, and perhaps len needs to be of type "const int" ;-)