[Scons-users] Command and Libscanner

[Jason Kenny]

Well the command case I am seeing as I am working a project at work is that I have "component" that have complex build scripts that may not be easy to "translate" into pure SCons. Calling the there build systems or scripts is the quick and easy way to get this to work with the Commad(). I am trying to see on the side about making a better "Cmake" and "automake" wrapper for common cases. custom makefile seem to be more interesting.. either way the issue I found was that my -j build would fail.. looking at the tree SCons did not see that a certain lib was needed to make the command happened. If this code was being built natively in SCons the Program or ShareLibrary builders would have the target scanners catch this via the ProgramScanner.
 Having this in the Command would be very useful, as well as exposing ProgramScanner as we do the DirScanner. I guess making a one-off builder via Command is doing what I am after. As far as flags... would we just be able to pass in current items as is? I was doing this in Parts:
https://bitbucket.org/dragon512/parts/src/master/parts/pieces/ccommand.py
I guess a little more tweaking would be needed to allow override of source_factory and target_factory and this should support all the builder flags via the **kw argument
Jason
________________________________
From: Scons-users <scons-users-bounces at scons.org> on behalf of Bill Deegan <bill at baddogconsulting.com>
Sent: Thursday, May 17, 2018 12:16 PM
To: SCons users mailing list
Subject: Re: [Scons-users] Command and Libscanner

So are you thinking this would be for effectively a one-off builder via Command?
Would you support all the Builder flags?


On Thu, May 17, 2018 at 12:22 PM, Jason Kenny <dragon512 at live.com<mailto:dragon512 at live.com>> wrote:
Do you have an concerns with me making a PR  to add target_source logic to Command() and program scanner to Defaults.py. I think this will really help with integrating scons with other build systems.

Jason
________________________________
From: Scons-users <scons-users-bounces at scons.org<mailto:scons-users-bounces at scons.org>> on behalf of Bill Deegan <bill at baddogconsulting.com<mailto:bill at baddogconsulting.com>>
Sent: Thursday, May 17, 2018 10:48 AM
To: SCons users mailing list
Subject: Re: [Scons-users] Command and Libscanner

Builder..


On Thu, May 17, 2018 at 11:43 AM, Jason Kenny <dragon512 at live.com<mailto:dragon512 at live.com>> wrote:
Hi,


I have a Command() that I need to add a SCons.Scanner.Prog.ProgramScanner() to so the libraries get scanned correctly so parallel build will work.

I am unclear if this can be done. I see I can add a source_scanner, but it does not look like I can add a target scanner.

Am I missing something or is the only way to do this is by making a builder?

Jason


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