From: Taylor Blau <email@example.com> To: Denton Liu <firstname.lastname@example.org> Cc: Git Mailing List <email@example.com>, "brian m . carlson" <firstname.lastname@example.org> Subject: Re: [PATCH 2/4] builtin/rev-parse: learn --null-oid Date: Fri, 18 Sep 2020 10:11:25 -0400 [thread overview] Message-ID: <20200918141125.GB1602321@nand.local> (raw) In-Reply-To: <email@example.com> Hi Denton, On Fri, Sep 18, 2020 at 04:19:03AM -0700, Denton Liu wrote: > When a user needed the null OID for scripting purposes, it used to be > very easy: hardcode 40 zeros. However, since Git started supporting > SHA-256, this assumption became false which may break some scripts. > Allow users to fix their broken scripts by providing users with a > hash-agnostic method of obtaining the null OID. I have not been very involved in the hash transition, so please take my comments with a grain of salt (and if they are misplaced, feel free to ignore them). This '--null-oid' thing makes me wonder exactly what it does. Yours gives a type-less object back, but what about scripts that want the OID of the empty blob or tree? Would having something like '--null-oid[=<type>]' be useful for them? On the one hand, it seems like a thing that would be useful, but on the other, those aren't *the* null OID when 'type' is 'blob' or 'tree'. A more appropriate name in that case might be '--empty-oid=tree'. So, that's an argument that '--null-oid' and '--empty-oid[=<type>]' should be two distinct things. I think I like that best. Do you have any thoughts about it? Thanks, Taylor
next prev parent reply other threads:[~2020-09-18 14:11 UTC|newest] Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-18 11:19 [PATCH 0/4] sample hooks: become hash agnostic Denton Liu 2020-09-18 11:19 ` [PATCH 1/4] hooks--pre-push.sample: prefer $() for command substitution Denton Liu 2020-09-18 16:57 ` Eric Sunshine 2020-09-18 11:19 ` [PATCH 2/4] builtin/rev-parse: learn --null-oid Denton Liu 2020-09-18 14:11 ` Taylor Blau [this message] 2020-09-18 14:16 ` Taylor Blau 2020-09-18 18:16 ` Junio C Hamano 2020-09-18 18:21 ` Taylor Blau 2020-09-18 21:26 ` brian m. carlson 2020-09-20 4:25 ` Chris Torek 2020-09-20 18:58 ` brian m. carlson 2020-09-20 15:35 ` Taylor Blau 2020-09-20 16:03 ` Andreas Schwab 2020-09-18 11:19 ` [PATCH 3/4] hooks--pre-push.sample: use hash-agnostic null OID Denton Liu 2020-09-18 17:06 ` Eric Sunshine 2020-09-18 11:19 ` [PATCH 4/4] hooks--update.sample: " Denton Liu 2020-09-18 17:08 ` Eric Sunshine 2020-09-18 21:35 ` [PATCH 0/4] sample hooks: become hash agnostic brian m. carlson 2020-09-23 9:38 ` [PATCH v2 0/3] " Denton Liu 2020-09-23 9:38 ` [PATCH v2 1/3] hooks--pre-push.sample: modernize script Denton Liu 2020-09-23 9:38 ` [PATCH v2 2/3] hooks--pre-push.sample: use hash-agnostic zero OID Denton Liu 2020-09-23 9:38 ` [PATCH v2 3/3] hooks--update.sample: " Denton Liu 2020-09-23 16:34 ` [PATCH v2 0/3] sample hooks: become hash agnostic Junio C Hamano
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