[gentoo-portage-dev] Portage persistence structures :: information about ports tree

[gentoo-portage-dev] Portage persistence structures :: information about ports tree

[João Macaíba]

Hi.

I'm reading portage docs and sources at /usr/lib/portage trying to
understand how portage persists information on 'available ports'.

So, I'm reading /usr/lib/portage/bin/emerge:

--- snip ---

	portdb = trees["porttree"].dbapi

--- snip ---

Where 'trees' is a parameter to 'search's object construction. 


But who really uses 'search class' is 'action_search' as we can see
below:

--- snip ---

def action_search(settings, trees, myopts, myfiles, spinner):
[...]
		searchinstance = search(settings, trees,
			spinner, "--searchdesc" in myopts,
			"--quiet" not in myopts, "--usepkg" in myopts,
			"--usepkgonly" in myopts)
[...]


--- snip ---

Later in 'emerge' file we have 

--- snip ---
action_search(settings, trees[settings["ROOT"]],
--- snip ---

... and so on ...

I'm trying to track the calls, instantiations, etc to figure out how
portage persists ports info.

May someone give me some help on this ? How does portage do the
searchs ? Walk into the ports tree and build some structure or store
this info on some embedded database like berkeley db or sqlite ?

Thanks in advance.

-- 
João Macaíba <joao.macaiba@gmail.com>

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Re: [gentoo-portage-dev] Portage persistence structures :: information about ports tree

[Marius Mauch]

On Mon, 09 Jun 2008 17:36:14 -0300
João Macaíba <joao.macaiba@gmail.com> wrote:

> May someone give me some help on this ? How does portage do the
> searchs ? Walk into the ports tree and build some structure or store
> this info on some embedded database like berkeley db or sqlite ?

You're probably looking for the portdbapi class defined in
pym/portage.py (or pym/portage/dbapi/porttree.py in 2.2), in particular
the cp_all(), cpv_all(), cp_list() and aux_get() methods.

Marius
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Re: [gentoo-portage-dev] Portage persistence structures :: information about ports tree

[João Macaíba]

On Tue, 2008-06-10 at 01:07 +0200, Marius Mauch wrote:
> On Mon, 09 Jun 2008 17:36:14 -0300
> João Macaíba <joao.macaiba@gmail.com> wrote:
> 
> > May someone give me some help on this ? How does portage do the
> > searchs ? Walk into the ports tree and build some structure or store
> > this info on some embedded database like berkeley db or sqlite ?
> 
> You're probably looking for the portdbapi class defined in
> pym/portage.py (or pym/portage/dbapi/porttree.py in 2.2), in particular
> the cp_all(), cpv_all(), cp_list() and aux_get() methods.
> 
> Marius

Thanks very much, Marius, for you help/time ! :)

I'll take a look at them.

Best regards.
-- 
João Macaíba <joao.macaiba@gmail.com>

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Re: [gentoo-portage-dev] Portage persistence structures :: information about ports tree

[Brian]

On Mon, 2008-06-09 at 20:51 -0300, João Macaíba wrote:
> On Tue, 2008-06-10 at 01:07 +0200, Marius Mauch wrote:
> > On Mon, 09 Jun 2008 17:36:14 -0300
> > João Macaíba <joao.macaiba@gmail.com> wrote:
> > 
> > > May someone give me some help on this ? How does portage do the
> > > searchs ? Walk into the ports tree and build some structure or store
> > > this info on some embedded database like berkeley db or sqlite ?
> > 
> > You're probably looking for the portdbapi class defined in
> > pym/portage.py (or pym/portage/dbapi/porttree.py in 2.2), in particular
> > the cp_all(), cpv_all(), cp_list() and aux_get() methods.
> > 
> > Marius
> 

I think for searching you may find the xmatch function to be a very
versatile and useful tool.  I think it is one of the more used functions
that porthole uses from portage.


> Thanks very much, Marius, for you help/time ! :)
> 
> I'll take a look at them.
> 
> Best regards.
> -- 
> João Macaíba <joao.macaiba@gmail.com>
> 
-- 
Brian <dol-sen@telus.net>

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Re: [gentoo-portage-dev] Portage persistence structures :: information about ports tree

[Zac Medico]

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João Macaíba wrote:
> May someone give me some help on this ? How does portage do the
> searchs ? Walk into the ports tree and build some structure or store
> this info on some embedded database like berkeley db or sqlite ?

If you want to use sqlite, you might find this useful:

http://gentoo-wiki.com/TIP_speed_up_portage_with_sqlite

Zac
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