linux-kernel - Re: [PATCH] kbuild: incremental tags updating with GNU GLOBAL

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Message-ID: <20110725133746.GD15684@lit.local.igalia.com>
Date:	Mon, 25 Jul 2011 15:37:46 +0200
From:	Víctor M. Jáquez L. <vjaquez@...lia.com>
To:	Michal Marek <mmarek@...e.cz>
Cc:	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
	Jianbin Kang <kjbmail@...il.com>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH] kbuild: incremental tags updating with GNU GLOBAL

On Mon, Jul 25, 2011 at 03:20:40PM +0200, Michal Marek wrote:
> On Mon, Jul 11, 2011 at 03:17:25PM +0200, Víctor M. Jáquez L. wrote:
> > On Mon, Jul 11, 2011 at 02:17:38PM +0200, Michal Marek wrote:
> > > On 11.7.2011 12:26, Víctor Manuel Jáquez Leal wrote:
> > > >Instead of generating the tag database each time the target is ran, is better
> > > >just update incrementally the database. It will expend less time.
> > > >
> > > >Signed-off-by: Víctor Manuel Jáquez Leal<vjaquez@...lia.com>
> > > >---
> > > >  scripts/tags.sh |    6 +++++-
> > > >  1 files changed, 5 insertions(+), 1 deletions(-)
> > > >
> > > >diff --git a/scripts/tags.sh b/scripts/tags.sh
> > > >index 75c5d24..6a2fedc 100755
> > > >--- a/scripts/tags.sh
> > > >+++ b/scripts/tags.sh
> > > >@@ -116,7 +116,11 @@ docscope()
> > > >
> > > >  dogtags()
> > > >  {
> > > >-	all_sources | gtags -f -
> > > >+	if global -p; then
> > > >+		global -u
> > > >+	else
> > > >+		all_sources | gtags -f -
> > > >+	fi
> > > 
> > > Will this handle new source files properly?
> > 
> > I ran a quick test and yes, it does.
> 
> I installed global and tried it myself:

Thanks a lot for the review and the testing!

> 1) The first 'make gtags' run prints a rather confusing message (fixable)
>  $ make gtags
>    GEN     gtags
>    global: GTAGS not found.
>  $

yep, I guess a 2>&1 > /dev/null could do it

> 2) A second run indexes the _whole_ tree, including everything under
> arch/. The point of the tags.sh script is that it indexes only files
> relevant to the current architecture. If someone wants to index the
> whole tree, they can run global directly.

nice catch! 

Well, that makes this patch a bit pointless :( 

Thanks again for the review and sorry for noise.

vmjl
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