[Scons-users] Have cache ignore some env variables

[Gilles CARRY]

Yes I meant "change detection" and indeed, enclosing the variables in 
$(...$) works.

Thanks for your help.

Best regards,

Gilles.


On 02/10/2017 06:47 PM, Dirk Bächle wrote:
> Hi Gilles,
>
>
> On 10.02.2017 12:58, Gilles CARRY wrote:
>> Hello,
>>
>> I would like Scons cache system ignore a defined set of env variables
>> that cause spurious rebuild. A typical one is "http_proxy" embedding
>> user/password strings.
>>
>> Is there a way to do this?
>
> what exactly do you mean by "cache system"? In the following, I assume 
> that you don't want the "change detection" mechanism to kick in for 
> some of your targets...
>
> The command line that you specify in the Action of your Builder gets 
> "substituted" twice, while replacing all defined environment 
> variables. Once for the actual shell command that is executed to build 
> the target, and once for computing the "signature" version of this 
> very command line.
> For the latter, you can cut out portions of the actual command by 
> enclosing them in "$( ... $)". For an example you can have a look at 
> the testcase "test/long-lines/signature.py"...
>
> Hope this helps.
>
> Best regards,
>
> Dirk
>
> _______________________________________________
> Scons-users mailing list
> Scons-users at scons.org
> https://pairlist4.pair.net/mailman/listinfo/scons-users