Re: [boost] [bjam] copy a file

Subject: Re: [boost] [bjam] copy a file
From: lcaminiti (lorcaminiti_at_[hidden])
Date: 2012-01-23 15:50:04

Steven Watanabe-4 wrote
> 
> AMDG
> 
> On 01/23/2012 10:26 AM, lcaminiti wrote:
>> Hello all,
>> 
>> I'd have a Jamfile that has a "doc" rule to build documentation `bjam
>> doc`.
>> I'd like to program another rule "config_doc" inside the Jamfile that
>> does
>> the following:
>> 
>> bjam config_doc:
>> 1) Copy the file /etc/config.txt to ./
>> 2) Copy the file ./src/config.txt to /etc/
>> 3) Run the doc rule
>> 4) Copy the file ./config.txt into /etc/
>> Where ./ is the current directory from where I'm running bjam. Ideally,
>> I'd
>> like 4) to be executed even if 3) fails.
>> 
>> Is there a way to do this?
>> 
> 
> If there's any way to avoid this, you should.
> 
> a) This can't safely run in parallel with
> other uses of the same rule or anything else
> that uses /etc/config.txt
> b) You can't guarantee that /etc/config.txt
> is restored properly if the process is interrupted.
> 
> If you really, /really/ need to do this,
> you should probably use a single action
> that does all of this.
> 

This is for one of my own projects (not Boost) for which I don't have to
worry about parallel access to the file. However, I do want to "catch"
errors and restore the file if I can't build the docs. If I can't use bjam,
I might create a script to do that...

Thanks.
--Lorenzo

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