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From: Jonathan Tan <jonathantanmy@google.com>
To: gitster@pobox.com
Cc: jonathantanmy@google.com, git@vger.kernel.org, peff@peff.net
Subject: Re: [RFC PATCH 4/7] fetch: --stdin
Date: Fri,  7 Aug 2020 14:10:28 -0700	[thread overview]
Message-ID: <20200807211028.2736644-1-jonathantanmy@google.com> (raw)
In-Reply-To: <xmqqft90omsw.fsf@gitster.c.googlers.com>

> > @@ -1741,6 +1745,13 @@ static int fetch_one(struct remote *remote, int argc, const char **argv, int pru
> >  		}
> >  	}
> >  
> > +	if (use_stdin_refspecs) {
> > +		struct strbuf line = STRBUF_INIT;
> > +		while (strbuf_getline_lf(&line, stdin) != EOF)
> > +			refspec_append(&rs, line.buf);
> > +		strbuf_release(&line);
> > +	}
> 
> This will use refspecs both from the command line and the standard
> input by appending?  IOW, these refspecs that came from the standard
> input are treated otherwise identically to those that came from the
> command line?
> 
> I do not particularly care whether it is "append to command line" or
> "replace command line", as I do not think it makes much difference
> in usability.  Just wanted to be sure you coded the behaviour you
> wanted.

Yes, except that I didn't plan to support the "tag foo" format. (My aim
with this is just to allow "git fetch" to take large numbers of
refspecs, because when we lazy fetch, the number of objects we fetch
might be large.)

> > @@ -1849,6 +1860,10 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
> >  			die(_("--filter can only be used with the remote "
> >  			      "configured in extensions.partialclone"));
> >  
> > +		if (stdin_refspecs)
> > +			die(_("--stdin can only be used when fetching "
> > +			      "from one remote"));
> 
> Is that only because you happened to have implemented the reading in
> fetch_one() that is designed to be called once per remote?  
> 
> You could read them here to a refspec for everybody, and then pass a
> pointer to that refspec as the extra parameter to fetch_one(), and
> fetch_one() can use that by duplicating and appending to its "rs",
> if we wanted to, no?  I do not know how important to support such a
> use case, though.  It just feels a bit of shame if this restriction
> is purely imposed by the implementation, when lifting the refstiction
> does not seem too involved.

Yes, and I only implemented the reading in fetch_one() because
fetch_multiple() does not read additional refspecs from the command-line
(it does not take "argv"). Looking at the code, this seems to be on
purpose - there is the error message "fetch --all does not make sense
with refspecs", and when --multiple is set, all args are assumed to be
remotes.

  reply	other threads:[~2020-08-07 21:10 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24 22:38 [RFC PATCH] Modify fetch-pack to no longer die on error? Jonathan Tan
2020-07-24 23:07 ` Junio C Hamano
2020-07-24 23:11 ` Junio C Hamano
2020-07-25 21:41   ` Jeff King
2020-07-25 23:01     ` Junio C Hamano
2020-07-27 17:11       ` Jeff King
2020-07-28 19:23       ` Jonathan Tan
2020-07-28 20:08         ` Jeff King
2020-07-29 18:53           ` Jonathan Tan
2020-07-29 19:29             ` Jeff King
2020-07-29 19:02           ` Junio C Hamano
2020-07-29 22:55             ` Jonathan Tan
2020-08-05  1:20 ` [RFC PATCH 0/7] Lazy fetch with subprocess Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 1/7] fetch-pack: allow NULL negotiator->add_tip Jonathan Tan
2020-08-05 19:53     ` Junio C Hamano
2020-08-07 20:53       ` Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 2/7] fetch-pack: allow NULL negotiator->known_common Jonathan Tan
2020-08-05 20:08     ` Junio C Hamano
2020-08-05 22:11       ` Junio C Hamano
2020-08-07 20:59         ` Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 3/7] negotiator/null: add null fetch negotiator Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 4/7] fetch: --stdin Jonathan Tan
2020-08-05 20:33     ` Junio C Hamano
2020-08-07 21:10       ` Jonathan Tan [this message]
2020-08-07 21:58         ` Junio C Hamano
2020-08-07 21:10       ` Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 5/7] fetch: submodule config Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 6/7] fetch: only populate existing_refs if needed Jonathan Tan
2020-08-05  1:20   ` [RFC PATCH 7/7] promisor-remote: use subprocess to fetch Jonathan Tan
2020-08-11 22:52 ` [PATCH v2 0/7] Lazy fetch with subprocess Jonathan Tan
2020-08-11 22:52   ` [PATCH v2 1/7] negotiator/null: add null fetch negotiator Jonathan Tan
2020-08-12 12:55     ` Derrick Stolee
2020-08-12 16:44       ` Junio C Hamano
2020-08-12 17:29         ` Jonathan Tan
2020-08-11 22:52   ` [PATCH v2 2/7] fetch: allow refspecs specified through stdin Jonathan Tan
2020-08-11 22:52   ` [PATCH v2 3/7] fetch: avoid reading submodule config until needed Jonathan Tan
2020-08-12 17:34     ` Junio C Hamano
2020-08-11 22:52   ` [PATCH v2 4/7] fetch: only populate existing_refs if needed Jonathan Tan
2020-08-12 18:06     ` Junio C Hamano
2020-08-11 22:52   ` [PATCH v2 5/7] fetch-pack: do not lazy-fetch during ref iteration Jonathan Tan
2020-08-12 18:25     ` Junio C Hamano
2020-08-11 22:52   ` [PATCH v2 6/7] promisor-remote: lazy-fetch objects in subprocess Jonathan Tan
2020-08-12 18:28     ` Junio C Hamano
2020-08-11 22:52   ` [PATCH v2 7/7] fetch-pack: remove no_dependents code Jonathan Tan
2020-08-12 12:51   ` [PATCH v2 0/7] Lazy fetch with subprocess Derrick Stolee
2020-08-18  4:01 ` [PATCH v3 " Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 1/7] negotiator/noop: add noop fetch negotiator Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 2/7] fetch: allow refspecs specified through stdin Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 3/7] fetch: avoid reading submodule config until needed Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 4/7] fetch: only populate existing_refs if needed Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 5/7] fetch-pack: do not lazy-fetch during ref iteration Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 6/7] promisor-remote: lazy-fetch objects in subprocess Jonathan Tan
2020-08-18  4:01   ` [PATCH v3 7/7] fetch-pack: remove no_dependents code Jonathan Tan
2020-08-18 19:56   ` [PATCH v3 0/7] Lazy fetch with subprocess Junio C Hamano
2020-08-18 22:32     ` Junio C Hamano
2020-08-18 23:36       ` [PATCH] fixup! promisor-remote: lazy-fetch objects in subprocess Jonathan Tan
2020-08-18 23:57         ` Junio C Hamano

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