From: Philippe Blain Date: Fri, 16 Jul 2021 01:31:45 GMT Subject: Re: [PATCH] parse-options: don't complete option aliases by default Message-ID: <1f41f94a-ebe1-69f0-7631-864cbbd1e1a0@gmail.com> In-Reply-To: <8735sfzgkg.fsf@evledraar.gmail.com> Hi Ævar, Le 2021-07-15 à 12:16, Ævar Arnfjörð Bjarmason a écrit : > > > I'm a bit biased here since I like --recursive better, but let's not > drag that whole argument up again. I don't find the argument in > bb62e0a99fc (clone: teach --recurse-submodules to optionally take a > pathspec, 2017-03-17) convincing enough to have moved such a prominent > use-case to a longer option name. > > But, water under the bridge. Aside from that: > > For me a Google search for "git clone --recursive" is ~40k results, but > "git clone --recurse-submodules". The former links to various > discussions/docs/stackoverflow answers, often --recurse-submodules isn't > mentioned at all or as an aside. > > I think it's unfortunate that we: > > 1. Conflate whether something shows up in completion v.s. the > help. Given its prominence and that "git clone -h" is ~50 lines why > not note --recursive there. As far as I understand (and tested), '--recursive' was listed in the short help but not the completion before bb62e0a99f (clone: teach --recurse-submodules to optionally take a pathspec, 2017-03-17). At the time the completion did not use '--git-completion-helper' and only '--recurse-submodules' was listed (since 5f072e0017 (completion: add option '--recurse-submodules' to 'git clone', 2016-07-27)). Starting from bb62e0a99f, it was not listed in the short help (because of PARSE_OPT_HIDDEN) nor the completion (because it was still not listed). Then starting from 5c387428f1 (parse-options: don't emit "ambiguous option" for aliases, 2019-04-29), it started being listed in the short help AND the completion again; in the short help because of the new code in usage_with_options_internal and in the completion because of the way preprocess_options is implemented, and at that time '--git-completion-helper' was used for '_git_clone'. After my patch, it would still be listed in the short help, as "alias of --recurse-submodules", but would not be listed by the completion (unless GIT_COMPLETION_SHOW_ALL is set). > > 2. Don't have the completion aware of these aliases, i.e. "git clone > --rec" before your chance offers a completion of both, that sucks, > we should fully complete the non-alias instead. Indeed. That's my main motivation. > > 3. Making it PARSE_OPT_HIDDEN "solves" #2 at the cost of hiding it in > "git help -h", and now this won't work, but did before: > > git clone --recursi > > I.e. even if we didn't want to do #2 *and* wanted to hide it in the > usage output surely completing an unmbigous prefix is better, even > if it's a hidden option? I agree that with my patch 'git clone --recursi' does not complete to '--recursive' (unless you've set GIT_COMPLETION_SHOW_ALL). But I'm not sure it's that big of a deal (after all if you typed this far you only have two letters left :P) But '--rec' will be sufficient to complete to '--recurse-submoduele', so it's even less letters to type. But this has nothing to do with PARSE_OPT_HIDDEN ('--recurse-submodules' is not hidden and aliases are not hidden either). So I'm not sure what you mean... > > Per-se none of this is a blocker or "we must fix this first" for this > particular change, we have this in many existing cases. > > I daresay there's no other alias that's in as wide a use in the wild, so > we should think about this one particularly carefully though. > > It's not fully clear from your commit message which of 1-3 you're aiming > for, I think it's more of the "discourage its use". As I wrote it's mainly #2, I'll update the commit message to be clearer. > > Sure, fair enough, but PARSE_OPT_HIDDEN is not a 1=1 mapping to that, > and can often lead to more user confusion. > > E.g. the user has used --recursive for years, but can't even find it in > -h (I also think it's a mistake to have entirely removed it from the > docs, even if one agrees with its "deprecation" I'd say we should keep > some "used to be called --recursive" note there). > Yeah, maybe it should have stayed in the docs. Again, my patch does not remove it from the short help. Thanks for you comments!:) Philippe.