From: Dmitry Gutov <dgutov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Generation of tags for the current project on the fly
Date: Thu, 18 Jan 2018 01:19:58 +0300 [thread overview]
Message-ID: <37a5b9db-92f2-bd86-b9a6-2a2314248a51@yandex.ru> (raw)
In-Reply-To: <834lnkw8gq.fsf@gnu.org>
On 1/17/18 23:12, Eli Zaretskii wrote:
>>>> The information is inside the TAGS file, isn't it?
>>>
>>> Not really: the signature of each file at the moment of scan is
>>> missing, and maybe also other things.
>>
>> Meaning it's not known at etags runtime? That's true.
>
> It's also not recorded after the run, so that the next run could
> compare against it.
What's a signature? The file names are recorded, of course. But not
mtimes, if you mean them.
>> Make tracks which files need to be recompiled, right? This could reuse
>> the same mechanism, if possible.
>
> Make doesn't support incremental builds, except on file granularity.
> Doing that with etags would be easy, but you say that is not the
> "incremental" tagging you had in mind, you want the granularity to be
> below file, i.e. on tag level. For that, a single time stamp of the
> TAGS file is insufficient, because all it can tell you is which files
> need to be re-tagged, whereas you want to know that on a per-tag
> basis.
On the contrary: file granularity should be fine. We just need *some*
accounting somewhere to detect which files to reindex.
It's hard for me to imagine how a granularity lower than file would even
work.
Another question is how to deal with file deletions: when a file is
absent, there's nothing to take into account, for Make to trigger an
incremental rebuild (or actually a deletion of this file's entry). Maybe
this is a rare enough case, though, that 'make tags' users will deal
with it manually in some fashion or other.
next prev parent reply other threads:[~2018-01-17 22:19 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-12 1:02 Generation of tags for the current project on the fly Dmitry Gutov
2018-01-12 9:01 ` Eli Zaretskii
2018-01-12 13:52 ` Dmitry Gutov
2018-01-12 18:52 ` Eli Zaretskii
2018-01-14 2:05 ` Dmitry Gutov
2018-01-14 16:21 ` Eli Zaretskii
2018-01-15 1:44 ` Dmitry Gutov
2018-01-15 5:37 ` Eli Zaretskii
2018-01-15 18:50 ` Dmitry Gutov
2018-01-16 17:50 ` Eli Zaretskii
2018-01-16 21:56 ` Dmitry Gutov
2018-01-17 15:40 ` Eli Zaretskii
2018-01-17 19:43 ` Dmitry Gutov
2018-01-17 20:12 ` Eli Zaretskii
2018-01-17 22:19 ` Dmitry Gutov [this message]
2018-01-17 22:28 ` Dmitry Gutov
2018-01-17 22:02 ` Tom Tromey
2018-01-17 22:44 ` Dmitry Gutov
2018-01-17 23:20 ` Tom Tromey
2018-01-18 0:14 ` Dmitry Gutov
2018-01-18 1:30 ` Dmitry Gutov
2018-01-19 1:21 ` Dmitry Gutov
2018-01-20 22:15 ` Tom Tromey
2018-01-20 23:57 ` Tom Tromey
2018-01-21 12:26 ` Dmitry Gutov
2018-01-30 4:45 ` Tom Tromey
2018-02-04 23:32 ` Dmitry Gutov
2018-01-30 5:05 ` Tom Tromey
2018-02-04 23:40 ` Dmitry Gutov
2018-02-05 17:06 ` Eli Zaretskii
2018-02-05 20:10 ` Dmitry Gutov
2018-02-06 19:36 ` Eli Zaretskii
2018-02-06 20:41 ` Dmitry Gutov
2018-02-07 3:26 ` Eli Zaretskii
2018-02-07 9:47 ` Dmitry Gutov
2018-02-07 21:30 ` Tom Tromey
2018-02-09 9:41 ` Dmitry Gutov
2018-02-08 20:31 ` John Yates
2018-02-09 0:22 ` Dmitry Gutov
2020-12-08 22:26 ` Dmitry Gutov
2018-01-17 11:08 ` Dmitry Gutov
2018-01-15 1:50 ` John Yates
2018-01-15 5:42 ` Eli Zaretskii
2018-01-15 15:01 ` Dmitry Gutov
2018-01-15 17:21 ` Eli Zaretskii
2018-01-15 17:45 ` Dmitry Gutov
2018-01-15 20:56 ` Matthias Meulien
2018-01-15 21:44 ` Dmitry Gutov
2018-01-15 16:33 ` John Yates
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