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From: Junio C Hamano <gitster@pobox.com>
To: Jonathan Tan <jonathantanmy@google.com>
Cc: git@vger.kernel.org, peff@peff.net
Subject: Re: [RFC PATCH 4/7] fetch: --stdin
Date: Wed, 05 Aug 2020 13:33:19 -0700	[thread overview]
Message-ID: <xmqqft90omsw.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <9ebcc5808a21e1f87370b6c18ea28168e63d4e3a.1596590295.git.jonathantanmy@google.com> (Jonathan Tan's message of "Tue, 4 Aug 2020 18:20:47 -0700")

Jonathan Tan <jonathantanmy@google.com> writes:

> Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
> ---
>  builtin/fetch.c | 19 +++++++++++++++++--
>  1 file changed, 17 insertions(+), 2 deletions(-)
>
> diff --git a/builtin/fetch.c b/builtin/fetch.c
> index 3ccf69753f..a5498646bf 100644
> --- a/builtin/fetch.c
> +++ b/builtin/fetch.c
> @@ -80,6 +80,7 @@ static struct list_objects_filter_options filter_options;
>  static struct string_list server_options = STRING_LIST_INIT_DUP;
>  static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
>  static int fetch_write_commit_graph = -1;
> +static int stdin_refspecs = 0;

Don't initialize statics to 0 (leave that to BSS).

> @@ -209,6 +210,8 @@ static struct option builtin_fetch_options[] = {
>  		 N_("check for forced-updates on all updated branches")),
>  	OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
>  		 N_("write the commit-graph after fetching")),
> +	OPT_BOOL(0, "stdin", &stdin_refspecs,
> +		 N_("accept refspecs from stdin")),
>  	OPT_END()
>  };
>  
> @@ -1684,7 +1687,8 @@ static inline void fetch_one_setup_partial(struct remote *remote)
>  	return;
>  }
>  
> -static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
> +static int fetch_one(struct remote *remote, int argc, const char **argv,
> +		     int prune_tags_ok, int use_stdin_refspecs)
>  {
>  	struct refspec rs = REFSPEC_INIT_FETCH;
>  	int i;
> @@ -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.

> @@ -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.

Thanks.


>  		if (max_children < 0)
>  			max_children = fetch_parallel_config;

  reply	other threads:[~2020-08-05 20:33 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 [this message]
2020-08-07 21:10       ` Jonathan Tan
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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