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Re: [buckminster-dev] Still fuzzy on generators/artifacts [message #15504] Wed, 16 April 2008 16:54
Todd Lee is currently offline Todd LeeFriend
Messages: 44
Registered: July 2009
Thanks Thomas,

I guess for starters, looking at the metadata lang ref, I'm not exactly
certain how the generator is defined or how the dependency on a generator
(or an attribute generated by a generator) works.

Assuming a component X has been specified as a Dependency in a given Cspec.
Generator allows to declare that component X can be obtained (or generated)
via an attribute y in a component Z. NOTE that the enclosing Cspec and all
dependant ones would than only declare Dependencys on X and Z to allow a
successful resolution.

>From the above it would seem that what you're saying is, given an enclosing
CSPEC for a component 'A'

Component:A "depends on" Component:X
and if
Component:Z "contributes" Attribute:Y
Attribute:Y "generates" Component:X
Component:A "depends on" Component:Z

So, a couple of really basic questions:

1) in the example above, where does the generator get defined - in
Component Z's cspec (and if not, then where)?
2) does the generator always have to generate a 'component' (i.e. an entity
with it's own cspec)? In the case I'm working on right now, what I'd really
like to do is trigger the build action for an artifact as part of the
resolution/materialization process. Is that possible?

The process I need would look something like this:

Component:A "depends on" Component:X (or more precisely, Attribute:Y)
Component:X "contributes" Attribute:Y
Attribute:Y "is generated by" Action:Z

I'm wondering if there's a way to, somewhere in the resolve/materialze/bind
phase, call Action:Z, producing Attribute (Artifact) Y?

I wonder if I need to revise my component definitions so that what I'm
defining as 'Artifacts' in my component (binary products built in
subdirectories) get bumped up to 'components' themselves....

Does that explaination clarify what I'm trying to do?
If you've got any suggestions here, I'd love to hear them :)


Todd Lee
Software Tools
ON Semiconductor
Tel: +1.519.884.9696 ext 2242
Fax: +1.519.884.0228

Thomas Hallgren
Sent by: To
buckminster-dev-b Buckminster developer discussions
ounces@eclipse.or <>
g cc

04/16/2008 11:47 Re: [buckminster-dev] Still fuzzy
AM on generators/artifacts

Please respond to

Hi Todd,
I don't think the generator concept is widely used at present and I haven't
got around to write any
demo sample for it just yet. We added it to support some use-cases in
Buckminster that we since then
moved away from (we moved from Axis with and interfaces generated from WSDL
to using JSON).

I'm more then happy to help though but in order to do that, you must tell
me some more about what
specific problems that you are facing.

Thomas Hallgren wrote:
> Hi there,
> Does anybody have any examples of a component which has a dependency on a
> sub-component (ie attribute) of another component which itself is a
> of an action?
> i.e. -
> Component A depends on Component B's 'artifact.lib' artifact.
> artifact.lib is generated by an action which depends only on the source
> the binary and the ant actor that builds it.
> I'm trying to manually write the buckminster cspecs (they're non-java
> components) for 'A' and 'B' above so that when B is resolved as a
> dependency of A, 'artifact.lib' is automatically built by the actor that
> generates it... Is this possible?
> Any help is greatly appreciated.
> T
> Todd Lee
> Software Tools
> ON Semiconductor
> Tel: +1.519.884.9696 ext 2242
> Fax: +1.519.884.0228
> E-mail:


> Sent by:

> buckminster-dev-b
> ounces@eclipse.or

> g

> 04/10/2008 04:13 [buckminster-dev] question about

> PM generators and/or 'just in time'

> building of dependencies


> Please respond to

> Buckminster

> developer

> discussions

> <buckminster-dev@




> I've got a couple of non-java (python) projects that I'm trying to
> 'buckminsterize' - The relation is something like this:
> Component A depends on artifact X contained in Component B
> So I've set up the dependencies so that when I call my top level cquery
> (dependent on Component A) I get a workspace with both Component A and
> Component B materialized (I'm working in the IDE right now). I've created
> buckminster.cspec's for both components as well as build.xml wrappers for
> the actual python build operations.
> I'm wondering if there's a way (I'm sure there must be, so I guess the
> question is really 'what's the recommended way') to build Component B so
> that artifact X is ready and waiting when Component A looks for it to
> fulfill the build-time dependency? Looking at the documentation, it would
> seem that perhaps this is the role of the 'generator' element in the
> but I'm not clear on how it should be implemented. Any help would be
> greatly appreciated.
> Thanks!
> Todd
> Todd Lee
> Software Tools
> ON Semiconductor
> Tel: +1.519.884.9696 ext 2242
> Fax: +1.519.884.0228
> E-mail:
> _______________________________________________
> buckminster-dev mailing list

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