[gentoo-dev] Depending on a range of slots

[gentoo-dev] Depending on a range of slots

[Michael Orlitzky]

In the dev-lang/php ebuilds, we currently have:

 DEPEND="... berkdb? ( =sys-libs/db-4* ) ..."

PHP will actually accept any 4.x or 5.x version of db; the ./configure
flag is poorly-named:

  https://bugs.gentoo.org/show_bug.cgi?id=521222

Now, we also get repoman warnings for not specifying a slot on that
dependency. But sys-libs/db has a bunch of 4.x and 5.x slots:

  * sys-libs/db
     Available versions:
     (1)    1.85-r3
     (3)    3.2.9_p2
     (4.2)  4.2.52_p5-r1
     (4.3)  4.3.29_p1-r1
     (4.4)  ~4.4.20_p4-r1
     (4.5)  4.5.20_p2-r1
     (4.6)  4.6.21_p4
     (4.7)  4.7.25_p4
     (4.8)  4.8.30-r1 4.8.30-r2
     (5.1)  ~5.1.29-r1
     (5.3)  ~5.3.28-r2
     (6.0)  ~6.0.30-r1 ~6.0.35
     (6.1)  [M]~6.1.26

Is there a way to say "give me any 4.x or 5.x slot"?

Re: [gentoo-dev] Depending on a range of slots

[Kristian Fiskerstrand]

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On 11/02/2015 06:48 PM, Michael Orlitzky wrote:
> In the dev-lang/php ebuilds, we currently have:
> 

..

> 
> Is there a way to say "give me any 4.x or 5.x slot"?
> 

Is that necessarily a good idea? Given that the database formats are
not compatible between versions without cleaning out the BDB
environment files etc it seems like a source of conflict?

Granted I'm not sure how this is used primarily in PHP, but for
net-misc/sks I just stick to a known good stable slot (in that case
4.8) and if switching that in the future expecting a news item or at
least an elog pointing to the upstream UPGRADING instructions[0]

References:
[0]
https://bitbucket.org/skskeyserver/sks-keyserver/src/867fbbe9720c269761472a64f047d416021a4e4a/UPGRADING?at=default&fileviewer=file-view-default

-- 
Kristian Fiskerstrand
Public PGP key 0xE3EDFAE3 at hkp://pool.sks-keyservers.net
fpr:94CB AFDD 3034 5109 5618 35AA 0B7F 8B60 E3ED FAE3


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Re: [gentoo-dev] Depending on a range of slots

[Michael Orlitzky]

On 11/02/2015 01:00 PM, Kristian Fiskerstrand wrote:
> On 11/02/2015 06:48 PM, Michael Orlitzky wrote:
>> In the dev-lang/php ebuilds, we currently have:
>>
>> Is there a way to say "give me any 4.x or 5.x slot"?
>>
> 
> Is that necessarily a good idea? Given that the database formats are
> not compatible between versions without cleaning out the BDB
> environment files etc it seems like a source of conflict?
> 

It depends on what the user needs it for. If somebody gives me a BDB
file and wants me to create a webpage listing its contents, then I need
to use whatever version of BDB the file's creator used.

If I'm writing a new application and just need to store some stuff, it
doesn't matter which version I have (so long as it doesn't change).

Using BDB with PHP is pretty rare from what I gather, but maybe somebody
has a crazy use case for it in Gentoo. The current dependency says "any
4.x version" so the least intrusive change to the ebuild would be to
retain that behavior or to extend it to allow any 4.x or 5.x version.

Re: [gentoo-dev] Depending on a range of slots

[Ciaran McCreesh]

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On Mon, 2 Nov 2015 12:48:29 -0500
Michael Orlitzky <mjo@gentoo.org> wrote:
> Is there a way to say "give me any 4.x or 5.x slot"?

No. Slots are meaningless strings and do not support any comparison
except equality.

-- 
Ciaran McCreesh

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Re: [gentoo-dev] Depending on a range of slots

[Michael Orlitzky]

On 11/02/2015 02:21 PM, Ciaran McCreesh wrote:
> On Mon, 2 Nov 2015 12:48:29 -0500
> Michael Orlitzky <mjo@gentoo.org> wrote:
>> Is there a way to say "give me any 4.x or 5.x slot"?
> 
> No. Slots are meaningless strings and do not support any comparison
> except equality.
> 

Followup question, which of these is less dumb?

Option 1: berkdb? ( >=sys-libs/db-4:*  <sys-libs/db-6:* )

Option 2: berkdb? ( || ( sys-libs/db:4.2 ... sys-libs/db:5.3 ) )

Re: [gentoo-dev] Depending on a range of slots

[Ciaran McCreesh]

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On Mon, 2 Nov 2015 14:33:57 -0500
Michael Orlitzky <mjo@gentoo.org> wrote:
> Followup question, which of these is less dumb?
> 
> Option 1: berkdb? ( >=sys-libs/db-4:*  <sys-libs/db-6:* )

This doesn't mean what you think it means. A user who has db-3 and db-7
installed satisfies that dependency.

> Option 2: berkdb? ( || ( sys-libs/db:4.2 ... sys-libs/db:5.3 ) )

Best option goes leftmost in ||.

-- 
Ciaran McCreesh

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Re: [gentoo-dev] Depending on a range of slots

[Michał Górny]

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On Mon, 2 Nov 2015 14:33:57 -0500
Michael Orlitzky <mjo@gentoo.org> wrote:

> On 11/02/2015 02:21 PM, Ciaran McCreesh wrote:
> > On Mon, 2 Nov 2015 12:48:29 -0500
> > Michael Orlitzky <mjo@gentoo.org> wrote:  
> >> Is there a way to say "give me any 4.x or 5.x slot"?  
> > 
> > No. Slots are meaningless strings and do not support any comparison
> > except equality.
> >   
> 
> Followup question, which of these is less dumb?
> 
> Option 1: berkdb? ( >=sys-libs/db-4:*  <sys-libs/db-6:* )

This one can install two berkdb versions...

-- 
Best regards,
Michał Górny
<http://dev.gentoo.org/~mgorny/>

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Re: [gentoo-dev] Depending on a range of slots

[Michael Orlitzky]

On 11/02/2015 02:48 PM, Ciaran McCreesh wrote:
> On Mon, 2 Nov 2015 14:33:57 -0500
> Michael Orlitzky <mjo@gentoo.org> wrote:
>> Followup question, which of these is less dumb?
>>
>> Option 1: berkdb? ( >=sys-libs/db-4:*  <sys-libs/db-6:* )
> 
> This doesn't mean what you think it means. A user who has db-3 and db-7
> installed satisfies that dependency.
> 

Indeed, thanks.


>> Option 2: berkdb? ( || ( sys-libs/db:4.2 ... sys-libs/db:5.3 ) )
> 
> Best option goes leftmost in ||.
> 

Got it, I'll reverse them.

Re: [gentoo-dev] Depending on a range of slots

[hasufell]

On 11/02/2015 09:51 PM, Michael Orlitzky wrote:
> On 11/02/2015 02:48 PM, Ciaran McCreesh wrote:
>> On Mon, 2 Nov 2015 14:33:57 -0500
>> Michael Orlitzky <mjo@gentoo.org> wrote:
>>> Followup question, which of these is less dumb?
>>>
>>> Option 1: berkdb? ( >=sys-libs/db-4:*  <sys-libs/db-6:* )
>>
>> This doesn't mean what you think it means. A user who has db-3 and db-7
>> installed satisfies that dependency.
>>
> 
> Indeed, thanks.
> 

That's an interesting pitfall. I am pretty sure we have this kind of
syntax a lot in the tree. Might make sense to document it.

Re: [gentoo-dev] Depending on a range of slots

[Ciaran McCreesh]

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On Mon, 2 Nov 2015 22:01:05 +0100
hasufell <hasufell@gentoo.org> wrote:
> That's an interesting pitfall. I am pretty sure we have this kind of
> syntax a lot in the tree. Might make sense to document it.

Would make more sense just to implement version ranges in full
generality, since developers seem to insist upon using < dependencies
anyway...

-- 
Ciaran McCreesh

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Re: [gentoo-dev] Depending on a range of slots

[Chí-Thanh Christopher Nguyễn]

hasufell schrieb:
>>>> Followup question, which of these is less dumb?
>>>>
>>>> Option 1: berkdb? ( >=sys-libs/db-4:*  <sys-libs/db-6:* )
>>>
>>> This doesn't mean what you think it means. A user who has db-3 and db-7
>>> installed satisfies that dependency.
>>>
>>
>> Indeed, thanks.
>>
> 
> That's an interesting pitfall. I am pretty sure we have this kind of
> syntax a lot in the tree. Might make sense to document it.

It's ok and works as expected as long as you depend on only one slot.


Best regards,
Chí-Thanh Christopher Nguyễn