[Scons-users] Doing a build time Glob()

[Gary Oberbrunner]

Hi Marc; you might try something like
http://www.scons.org/wiki/DynamicSourceGenerator.  I can't say it's "easy"
but it should work.


On Fri, Nov 29, 2013 at 3:32 PM, Marc Branchaud <marcnarc at xiplink.com>wrote:


> On 13-11-28 07:10 PM, Bill Deegan wrote:

> >

> > Correctness and repeatability are the main goal of SCons. (as well as a

> > certain amount of "batteries included" on understanding various build

> tools

> > and platforms, and also performance (which is still a work in progress))

> > It's very very unlikely you'll convince us to alter that.

>

> I agree 100% with these goals.  My point is that I think SCons could be a

> bit

> more flexible about how to achieve them.

>

> I also agree with you and Dirk that the make example has flawed dependency

> tracking, and that typical make-based solutions to those problems (e.g. a

> ".headers-installed" touchstone file) do not fully fix them.  But make's

> 80%

> solution means that it's easier to use make (instead of SCons) to

> construct a

> usually-good-enough build that integrates foreign build systems.

>

> Is there really just no way to make it easier for SCons to work with

> non-SCons builds while still meeting its goals?  Just because no other

> build

> system scans an output directory after a tool is run, does that mean that

> SCons can't?

>

> Because that's really what this comes down to, I think:  Some form of

> controlled dependency injection as the Builders are run.  And lo, this

> conversation is starting to sound familiar...  [1]

>

>                 M.

>

> [1] I'm sure I've said something like the following before:

>

> I have no idea of what SCons's internals look like, but imagine some kind

> of

> DynamicBuilder which specifies an output directory rather than a fixed list

> of target files.  When SCons first builds the dependency tree, it remembers

> any Nodes that might have a dependency on something inside that output

> directory (not on the directory itself; rather, maybe the directory is in

> the

> CPPPATH for some targets).  Then after the DynamicBuilder runs SCons

> rebuilds

> the dependencies of Nodes that might've depended on the contents of the

> output directory.

>

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-- 
Gary
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