Re: Attributes and :include

On Mon, 2004-09-27 at 12:22, Tim Hemel wrote:
> I am trying to debug an aap file and while doing that, I run into
> some strange behaviour, which is not the actual problem, but might
> be related.
> 
> I have the following files:
> 
> child.aap:
> 
> @for i in var2list(Items):
> 	:print `get_attr(i)`
> 
> 
> ----------------------------------------------------
> parent.aap:
> 
> Items = a { myattr=done }
> 	b { myattr=notdone }
> 	c
> 
> :attr { all = mine } $Items
> 
> @for i in var2list(_no.Items):
> 	:print `get_attr(i)` ...
> 
> :include child.aap
> -----------------------------------------------------
> 
> 
> When I run this, I get the following output:
> [tim@localhost ~]$ aap -f parent.aap
> {'all': 'mine', 'myattr': 'done'} ...
> {'all': 'mine', 'myattr': 'notdone'} ...
> {'all': 'mine'} ...
> {'all': 'mine', 'myattr': 'done'}
> {'all': 'mine', 'myattr': 'notdone'}
> {'all': 'mine'}
> Aap: No target on the command line and no $TARGET, build rules or "all"
> target in a recipe
> 
> Ok, so that works as expected, the attributes are available in both the
> parent and the child recipe.
> 
> Now, I comment out the :attr command in the parent file, and we get an
> unexpected result:
> [tim@localhost ~]$ aap -f parent.aap
> {} ...
> {} ...
> {} ...
> {}
> {}
> {}
> Aap: No target on the command line and no $TARGET, build rules or "all"
> target in a recipe
> 
> Hey! where did all my attributes go?
> 
> The actual problem I am trying to solve has an :attr command, but tries
> to access the attributes from within a dependency and an action, where
> it, for some reason, fails to do this.
> 
> 
> Tim
> 
Ok, I can reproduce the original bug as well. For this, I have changed
the child.aap to the following:

@for i in var2list(Items):
	:mkdir {f} bla
	:pushdir bla
	:print `get_attr(i)`
	:popdir

If I run the script now, I get:
[tim@localhost ~]$ aap -f parent.aap
{'all': 'mine', 'myattr': 'done'} ...
{'all': 'mine', 'myattr': 'notdone'} ...
{'all': 'mine'} ...
{}
{}
{}
Aap: No target on the command line and no $TARGET, build rules or "all"
target in a recipe

All attributes are gone, and it is apparently caused by the :pushdir
command. My workaround is to copy the variables first and then use them,
like:

	@d = `get_attr(i)`
	:pushdir bla
	:print `d`
	:popdir


Tim



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