HEADSUP: FLAVORS (initial version) and subpackages proposals

[Bryan Drewery]

On 12/18/2016 4:31 PM, Baptiste Daroussin wrote:
> Hi all,
> 
> I have been working for a while on 2 long standing feature request for the ports
> tree: flavors and subpackages.
> 
> For flavors I would like to propose a simple approach first which is more like a
> rework of the slave ports for now:
> 
> Examples available here:
> https://reviews.freebsd.org/D8840 (with the implementation)
> and
> https://reviews.freebsd.org/D8843
> 
> Design: introduce a 3rd level in the hierarchy and make it work a bit like slave
> ports
> 
> pros:
> - all slave ports are self hosted under the same directory: easier for
>   maintenance
> - should work with all existing tools
> 
> cons:
> - hackish: it is not really much more than a slave port
> - it adds plenty of new Makefiles :(
> 
> I think anyway this is an improvement
> 
> Next step after that is in would be to extend it to allow some dependency on "I
> depend on whatever flavor if port X"
> 
> Subpackages:
> Design:
> Add a new macro MULTI_PACKAGES
> flag plist with an @pkg{suffixofthesubpackage} file
> the framework will split the plist into small plist and create all the packages
> All variables like COMMENT can be overridden with a COMMENT_${suffixofthesubpackage}
> 
> pros:
> - simple and working almost now
> - allow to simplify lots of ports
> - options friendly (<optionname>_PACKAGE automatically appends a new entry to
>   MULTI_PACKAGES)
> 
> cons:
> - will break the paradigm that certain tools depend on (portmaster/portupgrade
>   in particular are a huge problem since they are not actively maintained)
> 
> Example of the usage:
> https://people.freebsd.org/~bapt/multipackage.diff
> 
> Note that I took the mpg123 as an example because it was a simple one to test
> not because it may need subpackages
> 
> As a result you build 3 packages:
> mpg123 (the runtime tools)
> mpg123-lib: the runtime libraries
> mpg123-sndio: the sndio plugin
> 
> LIB_DEPENDS on ports depending on libmpg123.so does not have to be changed, the
> framework already automatically register only the mpg123-lib as a dependency and
> not others.
> 
> Not the example is missing one thing: a dependency between mpeg123-lib and
> mpg123
> 
> The second is not ready yet and would take time to land
> 
> Any comment?
> 
> Best regards,
> Bapt
> 

By the way, support for Poudriere on this is progressing.  A Pull
request was submitted with support for another FLAVORS-type
implementation, that pretty much works with your patches as well. I am
working to resolve the DEPENDS_ARGS bug first, which also fixes allowing
the same ORIGIN into the queue multiple times.  Once that is done, then
FLAVORS can be supported in Poudriere.

-- 
Regards,
Bryan Drewery

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