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https://issues.apache.org/jira/browse/BUILDR-134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623191#action_12623191
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Ittay Dror commented on BUILDR-134:
-----------------------------------

I guess the missing link here is the ability to specify a symbolic path in the 
right hand of the first command. something like
project.layout[:source, :main] = [:source, 'my_main]

then in 'expand', if the value is an array, its components are expanded to form 
the result

> changing "parent" component in layout  doesn't change child if already 
> referenced
> ---------------------------------------------------------------------------------
>
>                 Key: BUILDR-134
>                 URL: https://issues.apache.org/jira/browse/BUILDR-134
>             Project: Buildr
>          Issue Type: Bug
>    Affects Versions: 1.3.2
>            Reporter: Ittay Dror
>             Fix For: 1.3.3
>
>
> Take this code:
>   project.layout[:source :main] = project.layout.expand(:source, 'my_main')
>   project.layout[:source] = 'my_source'
> I would expect project.layout.expand(:source, :main) to then expand to 
> my_source/my_main. It doesn't, it expands to source/my_main.
> Obviously the above is just a toy example and can be solved by reordering the 
> lines, however in a complex buildfile and extensions, this is not so easy.

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