Re: [gentoo-dev] [RFC] Deprecating an eclass

2008-02-18 Thread Doug Klima

Doug Klima wrote:

Howdy all,

We need to agree upon some syntax which we can mark an eclass as 
deprecated and potentially point to a replacement or multiple 
replacements.


Discuss.


Ok. I guess no one else has any feelings about this.

Potentially doing something like:

DEPRECIATED=$DEPRECATED $ECLASS

at the top of each deprecated eclass. In the end $DEPRECATED would have 
a list of all the eclasses that are deprecated?


Maybe even:

DEPRECATED_MYECLASS=myreplacement

would mean that myeclass.eclass is replaced by myreplacement.eclass ?
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Re: [gentoo-dev] [RFC] Deprecating an eclass

2008-02-18 Thread Ciaran McCreesh
On Mon, 18 Feb 2008 15:43:56 -0500
Doug Klima [EMAIL PROTECTED] wrote:
 Ok. I guess no one else has any feelings about this.
 
 Potentially doing something like:
 
 DEPRECIATED=$DEPRECATED $ECLASS

Deprecated != depreciated.

 at the top of each deprecated eclass. In the end $DEPRECATED would
 have a list of all the eclasses that are deprecated?
 
 Maybe even:
 
 DEPRECATED_MYECLASS=myreplacement
 
 would mean that myeclass.eclass is replaced by myreplacement.eclass ?

Well, that depends upon whether you want it to be part of the C/P-V
metadata... If you do, it's a cache format change (and you can't easily
do DEPRECATED_*). But then, deprecation is a property of the eclass,
not an C/P-V.

-- 
Ciaran McCreesh


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Re: [gentoo-dev] [RFC] Deprecating an eclass

2008-02-18 Thread Doug Klima

Ciaran McCreesh wrote:

On Mon, 18 Feb 2008 15:43:56 -0500
Doug Klima [EMAIL PROTECTED] wrote:
  

Ok. I guess no one else has any feelings about this.

Potentially doing something like:

DEPRECIATED=$DEPRECATED $ECLASS



Deprecated != depreciated.
  

You caught my typo. You clearly still got the meaning of the e-mail...
  

at the top of each deprecated eclass. In the end $DEPRECATED would
have a list of all the eclasses that are deprecated?

Maybe even:

DEPRECATED_MYECLASS=myreplacement

would mean that myeclass.eclass is replaced by myreplacement.eclass ?



Well, that depends upon whether you want it to be part of the C/P-V
metadata... If you do, it's a cache format change (and you can't easily
do DEPRECATED_*). But then, deprecation is a property of the eclass,
not an C/P-V.

  
Deprecation is a property of the eclass. Not of an ebuild. The point is 
to allow utilities and users/developers to clearly see that an eclass is 
deprecated and what they should be using in place of it.

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Re: [gentoo-dev] [RFC] Deprecating an eclass

2008-02-18 Thread Ciaran McCreesh
On Mon, 18 Feb 2008 17:19:55 -0500
Doug Klima [EMAIL PROTECTED] wrote:
  Well, that depends upon whether you want it to be part of the C/P-V
  metadata... If you do, it's a cache format change (and you can't
  easily do DEPRECATED_*). But then, deprecation is a property of the
  eclass, not an C/P-V.

 Deprecation is a property of the eclass. Not of an ebuild. The point
 is to allow utilities and users/developers to clearly see that an
 eclass is deprecated and what they should be using in place of it.

Right. eclasses don't currently have metadata (and there's no easy way
for them to have it, since eclasses can't be sourced standalone). If
you make deprecation a metadata variable, there will be no way for a
package manager to determine whether an eclass is deprecated unless it
has an ebuild that uses that eclass. Is this a satisfactory restriction?

-- 
Ciaran McCreesh


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Re: [gentoo-dev] [RFC] Deprecating an eclass

2008-02-18 Thread Torsten Rehn
On Monday 18 February 2008, Doug Klima wrote:
 Potentially doing something like:
 DEPRECIATED=$DEPRECATED $ECLASS
 at the top of each deprecated eclass.

Adding deprecation info directly into the eclass file feels wrong to me. 
(Eclasses are free software after all and can be reused - ok, nobody will 
ever do that, but we're talking theory here - so we shouldn't put Gentoo 
policy in there.)

What about /usr/portage/profiles/deprecated_eclasses looking like

old_eclass_1,old_eclass_2:new_eclass_1,new_eclass_2

indicating that the old_eclasses have been deprecated by the new_eclasses. 
Having multiple eclasses deprecated by multiple eclasses may not be that 
common, but this kind of syntax allows for some grouping of related eclasses 
being replaced together.
-- 
Torsten Rehn [EMAIL PROTECTED]
Gentoo AMD64 Arch Tester
http://scel.info


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Re: [gentoo-dev] [RFC] Deprecating an eclass

2008-02-18 Thread Petteri Räty

Ciaran McCreesh kirjoitti:

On Mon, 18 Feb 2008 17:19:55 -0500
Doug Klima [EMAIL PROTECTED] wrote:

Well, that depends upon whether you want it to be part of the C/P-V
metadata... If you do, it's a cache format change (and you can't
easily do DEPRECATED_*). But then, deprecation is a property of the
eclass, not an C/P-V.

Deprecation is a property of the eclass. Not of an ebuild. The point
is to allow utilities and users/developers to clearly see that an
eclass is deprecated and what they should be using in place of it.


Right. eclasses don't currently have metadata (and there's no easy way
for them to have it, since eclasses can't be sourced standalone). If
you make deprecation a metadata variable, there will be no way for a
package manager to determine whether an eclass is deprecated unless it
has an ebuild that uses that eclass. Is this a satisfactory restriction?



A metadata.xml like file for eclasses could fit the bill. It could have 
both the maintainer info and the deprecation information among other 
things.


Regards,
Petteri



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[gentoo-dev] [RFC] Deprecating an eclass

2008-02-15 Thread Doug Klima

Howdy all,

We need to agree upon some syntax which we can mark an eclass as 
deprecated and potentially point to a replacement or multiple replacements.


Discuss.

--
Doug
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