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From: Junio C Hamano <gitster@pobox.com>
To: nbelakovski@gmail.com
Cc: git@vger.kernel.org, peff@peff.net, rafa.almas@gmail.com,
	avarab@gmail.com
Subject: Re: [PATCH v6 1/3] ref-filter: add worktreepath atom
Date: Wed, 23 Jan 2019 10:57:19 -0800	[thread overview]
Message-ID: <xmqq36pjcicw.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20190122232301.95971-2-nbelakovski@gmail.com> (nbelakovski's message of "Tue, 22 Jan 2019 15:22:59 -0800")

nbelakovski@gmail.com writes:

> From: Nickolai Belakovski <nbelakovski@gmail.com>
>
> Add an atom providing the path of the linked worktree where this ref is
> checked out, if it is checked out in any linked worktrees, and empty
> string otherwise.
> ---

Missing sign-off?

> +static int ref_to_worktree_map_cmpfnc(const void *unused_lookupdata, const void *existing_hashmap_entry_to_test,
> +				   const void *key, const void *keydata_aka_refname)
> +{
> +	const struct ref_to_worktree_entry *e = existing_hashmap_entry_to_test;
> +	const struct ref_to_worktree_entry *k = key;
> +	return strcmp(e->wt->head_ref, keydata_aka_refname ? keydata_aka_refname : k->wt->head_ref);

Overlong line.

> +}


> +
> +static struct hashmap ref_to_worktree_map;
> +static struct worktree **worktrees = NULL;

No need to initialize static vars to 0/NULL.

> @@ -438,6 +456,34 @@ static int head_atom_parser(const struct ref_format *format, struct used_atom *a
>  	return 0;
>  }
>  
> +static int worktree_atom_parser(const struct ref_format *format,
> +				struct used_atom *atom,
> +				const char *arg,
> +				struct strbuf *unused_err)
> +{
> +	int i;
> +
> +	if (worktrees)
> +		return 0;
> +
> +	worktrees = get_worktrees(0);
> +
> +	hashmap_init(&ref_to_worktree_map, ref_to_worktree_map_cmpfnc, NULL, 0);
> +
> +	for (i = 0; worktrees[i]; i++) {
> +		if (worktrees[i]->head_ref) {
> +			struct ref_to_worktree_entry *entry;
> +			entry = xmalloc(sizeof(*entry));
> +			entry->wt = worktrees[i];
> +			hashmap_entry_init(entry, strhash(worktrees[i]->head_ref));
> +
> +			hashmap_add(&ref_to_worktree_map, entry);
> +		}
> +	}
> +
> +	return 0;
> +}

It is kind of interesting that a function for parsing an "atom" in
"format" does not look at none of its arguments at all ;-)  The fact
that "%(worktreepath)" atom got noticed by verify_ref_format() alone
is of interest for this function.

The helper iterates over all worktrees, registers them in a hashmap
ref_to_worktree_map, indexed by the head reference.

OK.

> +static char *get_worktree_path(const struct used_atom *atom, const struct ref_array_item *ref)
> +{
> +	struct strbuf val = STRBUF_INIT;
> +	struct hashmap_entry entry;
> +	struct ref_to_worktree_entry *lookup_result;
> +
> +	hashmap_entry_init(&entry, strhash(ref->refname));
> +	lookup_result = hashmap_get(&ref_to_worktree_map, &entry, ref->refname);
> +
> +	if (lookup_result)
> +		strbuf_addstr(&val, lookup_result->wt->path);
> +
> +	return strbuf_detach(&val, NULL);
> +}

We do not need a strbuf to do the above, do we?

	hashmap_entry_init(...);
	lookup_result = hashmap_get(...);
	if (lookup_result)
		return xstrdup(lookup_result->wt->path);
	else
		return xstrdup("");

or something like that, perhaps?

> @@ -1562,6 +1624,13 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
>  
>  		if (starts_with(name, "refname"))
>  			refname = get_refname(atom, ref);
> +		else if (starts_with(name, "worktreepath")) {
> +			if (ref->kind == FILTER_REFS_BRANCHES)
> +				v->s = get_worktree_path(atom, ref);
> +			else
> +				v->s = xstrdup("");
> +			continue;
> +		}

I am wondering if get_worktree_path() being called should be the
triggering event for lazy initialization worktree_atom_parser() is
doing in this patch, instead of verify_ref_format() seeing the
"%(worktreepath)" atom.  Is there any codepath that wants to make
sure the lazy initialization is done without/before populate_value()
sees a use of the "%(worktreepath)" atom?  If so, such a plan would
not work, but otherwise, we can do the following:

 - rename worktree_atom_parser() to lazy_init_worktrees() or
   something, and remove all of its unused parameters.

 - remove parser callback for "worktreepath" from valid_atom[].

 - call lazy_inti_worktrees() at the beginning of
   get_worktree_path().

Hmm?

  reply	other threads:[~2019-01-23 18:57 UTC|newest]

Thread overview: 125+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <"<CAC05386q2iGoiJ_fRgwoOTF23exEN2D1+oh4VjajEvYQ58O1TQ@mail.gmail.com>
2018-09-27 15:13 ` [PATCH] branch: colorize branches checked out in a linked working tree the same way as the current branch is colorized Nickolai Belakovski
2018-09-27 15:33   ` Ævar Arnfjörð Bjarmason
2018-09-27 17:46     ` Nickolai Belakovski
     [not found]     ` <CAC05387S9P+w8yqqcjkQDnURYSgQmqtukxS4KvqJu-kDA+_o0g@mail.gmail.com>
2018-09-27 17:59       ` Ævar Arnfjörð Bjarmason
2018-10-02 20:41         ` Johannes Schindelin
2018-09-27 17:58   ` Duy Nguyen
2018-09-27 18:17   ` Jeff King
2018-09-27 18:39     ` Nickolai Belakovski
2018-09-27 18:51       ` Jeff King
2018-09-27 19:28     ` Rafael Ascensão
2018-09-27 19:35       ` Jeff King
2018-09-27 19:41         ` Jeff King
2018-09-27 21:22           ` Junio C Hamano
2018-09-28  1:05             ` Jeff King
2018-09-28  1:28               ` Junio C Hamano
2018-09-27 21:35         ` Rafael Ascensão
2018-09-28  1:07           ` Jeff King
2018-09-27 20:02       ` Ævar Arnfjörð Bjarmason
2018-09-27 20:16         ` Nickolai Belakovski
2018-09-27 20:40           ` Rafael Ascensão
2018-11-11 23:58             ` [PATCH v2 0/2] refactoring branch colorization to ref-filter nbelakovski
2018-11-11 23:58               ` [PATCH v2 1/2] ref-filter: add worktree atom nbelakovski
2018-11-12 10:11                 ` Junio C Hamano
2018-11-12 12:22                   ` Jeff King
2018-11-13  1:38                     ` Junio C Hamano
2018-11-21 14:05                       ` Nickolai Belakovski
2018-11-21 14:08                         ` Jeff King
2018-11-12 12:23                 ` Jeff King
2018-11-11 23:58               ` [PATCH v2 2/2] branch: Mark and colorize a branch differently if it is checked out in a linked worktree nbelakovski
2018-11-12 10:20                 ` Junio C Hamano
2018-11-12 12:14                   ` Jeff King
2018-11-12 18:07                     ` Rafael Ascensão
2018-11-13  1:45                       ` Junio C Hamano
2018-11-13 14:49                       ` Jeff King
2018-11-21 14:07                         ` Nickolai Belakovski
2018-12-16 21:57               ` [PATCH v3 0/3] nbelakovski
2018-12-16 21:57                 ` [PATCH v3 1/3] ref-filter: add worktreepath atom nbelakovski
2018-12-18 17:22                   ` Jeff King
2018-12-20  7:09                     ` Nickolai Belakovski
2018-12-20 14:59                       ` Jeff King
2018-12-24  8:47                         ` [PATCH v4 0/3] nbelakovski
2018-12-24  8:47                           ` [PATCH v4 1/3] ref-filter: add worktreepath atom nbelakovski
2019-01-03  5:40                             ` Jeff King
2019-01-03  9:31                               ` Eric Sunshine
2018-12-24  8:47                           ` [PATCH v4 2/3] branch: Mark and color a branch differently if it is checked out in a linked worktree nbelakovski
2018-12-24  8:47                           ` [PATCH v4 3/3] branch: Add an extra verbose output displaying worktree path for refs " nbelakovski
2019-01-03  5:42                             ` Jeff King
2019-01-03  5:22                           ` [PATCH v4 0/3] Jeff King
2018-12-16 21:57                 ` [PATCH v3 2/3] branch: Mark and color a branch differently if it is checked out in a linked worktree nbelakovski
2018-12-16 21:57                 ` [PATCH v3 3/3] branch: Add an extra verbose output displaying worktree path for refs " nbelakovski
2018-12-18 17:25                 ` [PATCH v3 0/3] Jeff King
2019-01-06  0:26   ` [PATCH v5 0/3] nbelakovski
2019-01-06  0:26     ` [PATCH v5 1/3] ref-filter: add worktreepath atom nbelakovski
2019-01-07 18:20       ` Junio C Hamano
2019-01-18 22:17         ` Nickolai Belakovski
2019-01-18 22:20           ` Nickolai Belakovski
2019-01-06  0:26     ` [PATCH v5 2/3] branch: Mark and color a branch differently if it is checked out in a linked worktree nbelakovski
2019-01-07 19:04       ` Junio C Hamano
2019-01-10 21:42         ` Philip Oakley
2019-01-13  1:41           ` Nickolai Belakovski
2019-01-14 18:18             ` Junio C Hamano
2019-01-18 22:18               ` Nickolai Belakovski
2019-01-06  0:26     ` [PATCH v5 3/3] branch: Add an extra verbose output displaying worktree path for refs " nbelakovski
2019-01-07 19:09       ` Junio C Hamano
2019-01-22 23:22   ` [PATCH v6 0/3] nbelakovski
2019-01-22 23:22     ` [PATCH v6 1/3] ref-filter: add worktreepath atom nbelakovski
2019-01-23 18:57       ` Junio C Hamano [this message]
2019-01-23 23:34         ` Nickolai Belakovski
2019-01-24 18:26           ` Junio C Hamano
2019-01-24 18:32             ` Jeff King
2019-01-24 19:27               ` Junio C Hamano
2019-01-24 19:34                 ` Jeff King
2019-01-24 19:30               ` Junio C Hamano
2019-01-24 21:26                 ` Jeff King
2019-01-31 20:53                   ` Nickolai Belakovski
2019-01-31 23:21                     ` Jeff King
2019-01-31 21:42                   ` Junio C Hamano
2019-01-31 23:20                     ` Jeff King
2019-01-22 23:23     ` [PATCH v6 2/3] branch: Mark and color a branch differently if it is checked out in a linked worktree nbelakovski
2019-01-22 23:23     ` [PATCH v6 3/3] branch: Add an extra verbose output displaying worktree path for refs " nbelakovski
2019-02-01 22:04   ` [PATCH v7 0/3] nbelakovski
2019-02-01 22:28     ` Junio C Hamano
2019-02-01 23:31       ` Nickolai Belakovski
2019-02-01 22:04   ` [PATCH v7 1/3] ref-filter: add worktreepath atom nbelakovski
2019-02-01 22:20     ` Eric Sunshine
2019-02-01 22:41       ` Nickolai Belakovski
2019-02-04 18:14         ` Junio C Hamano
2019-02-18 10:09           ` Nickolai Belakovski
2019-02-01 22:31     ` Junio C Hamano
2019-02-01 22:04   ` [PATCH v7 2/3] branch: Mark and color a branch differently if it is checked out in a linked worktree nbelakovski
2019-02-01 22:34     ` Junio C Hamano
2019-02-01 23:12       ` Nickolai Belakovski
2019-02-04 18:18         ` Junio C Hamano
2019-02-01 22:04   ` [PATCH v7 3/3] branch: Add an extra verbose output displaying worktree path for refs " nbelakovski
2019-02-01 22:27     ` Eric Sunshine
2019-02-01 22:45       ` Nickolai Belakovski
2019-02-01 22:53     ` Junio C Hamano
2019-02-01 23:06       ` Nickolai Belakovski
2019-02-02  1:22         ` [RFC] Sample of test for git branch -vv nbelakovski
2019-02-19  8:31   ` [PATCH v8 0/3] nbelakovski
2019-02-19  8:31     ` [PATCH v8 1/3] ref-filter: add worktreepath atom nbelakovski
2019-02-19  8:31     ` [PATCH v8 2/3] branch: update output to include worktree info nbelakovski
2019-02-21 12:44       ` Jeff King
2019-03-14  5:45         ` Nickolai Belakovski
2019-02-19  8:31     ` [PATCH v8 3/3] branch: add worktree info on verbose output nbelakovski
2019-02-21 12:59       ` Jeff King
2019-03-14  5:58         ` Nickolai Belakovski
2019-03-18  2:12           ` Junio C Hamano
2019-02-21 12:36     ` [PATCH v8 0/3] Jeff King
2019-03-14  6:10       ` Nickolai Belakovski
2019-03-16  1:38   ` [PATCH v9 0/3] nbelakovski
2019-03-16  1:38     ` [PATCH v9 1/3] ref-filter: add worktreepath atom nbelakovski
2019-03-16  1:38     ` [PATCH v9 2/3] branch: update output to include worktree info nbelakovski
2019-03-16  1:38     ` [PATCH v9 3/3] branch: add worktree info on verbose output nbelakovski
2019-03-18 12:10       ` SZEDER Gábor
2019-03-18  5:30     ` [PATCH v9 0/3] Junio C Hamano
2019-04-29  5:19   ` [PATCH v10 0/3] nbelakovski
2019-04-29  5:19     ` [PATCH v10 1/3] ref-filter: add worktreepath atom nbelakovski
2019-04-29  5:19     ` [PATCH v10 2/3] branch: update output to include worktree info nbelakovski
2019-04-29  5:19     ` [PATCH v10 3/3] branch: add worktree info on verbose output nbelakovski
2019-04-29 14:12     ` [PATCH v10 0/3] SZEDER Gábor
2019-04-29 19:27       ` Nickolai Belakovski
2019-04-29 20:57     ` Johannes Schindelin
2019-04-29 21:33       ` Nickolai Belakovski
     [not found]       ` <CAC05385Mc7pqiCd5mb+1c4WM+v7K=h=GMHuvkw9xizhRFJXXBA@mail.gmail.com>
2019-04-30 21:46         ` Johannes Schindelin

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