[Scons-users] Customize build decision logic for phony targets, that doesn't involve files

[William Blevins]

Correction. With Value('target') as output, SCons will not build even with
AlwaysBuild apparently. The point I am trying to make is that 'target' is
expected to be a file by default. In theory, you can define your own Node.*
type, but in your example, 'target' is expected to be a file.

V/R,
William

On Tue, Mar 29, 2016 at 1:20 PM, William Blevins <wblevins001 at gmail.com>
wrote:

> Andrew,
>
> In this case, SCons will always rebuild because specified target 'target'
> will never be created. If you, for example, change the target to
> Value('target') SCons will never call the action because the target never
> needs to be built without wrapping the env.Custom output in
> env.AlwaysBuild(). The rebuild has nothing to do with the source Value('a')
> since Value('a') obviously never changes. You can look at the contents of
> the scons database file using "sconsign <database_file>" which defaults to
> .scons.dblite I believe in the "#" directory.
>
> Does that answer your question?
>
> V/R,
> William
>
> On Tue, Mar 29, 2016 at 11:00 AM, Andrew Pashkin <andrew.pashkin at gmx.co.uk
> > wrote:
>
>> On 03/28/2016 07:59 PM, Bill Deegan wrote:
>>
>> Try:
>> scons --debug=explain
>>
>> Here is what I get:
>>
>> scons: Reading SConscript files ...
>> scons: done reading SConscript files.
>> scons: Building targets ...
>> scons: building `target' because it doesn't exist
>> action(["target"], ['a'])
>> Do crazy things
>> scons: done building targets.
>>
>> What I want to know is not a concrete solution, but an answer on a
>> question: conceptually, should SCons handle such case, as this script, or
>> not? Meaning - is it a bug or it's a intended constraint for SCons to work
>> only on files?
>>
>> _______________________________________________
>> Scons-users mailing list
>> Scons-users at scons.org
>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist4.pair.net/pipermail/scons-users/attachments/20160329/6033a2c9/attachment.html>