Hi Alex,
On Jan 24, 2010, at 1:33 PM, Alex Boisvert wrote:
> On many occasions I've been wanting to write a build.yml such as,
>
> scala.version: 2.8.0.Beta1-RC8-SNAPSHOT
>
> scala.test: 1.0.1-for-scala-#{scala.version}
> scala.check: 1.7-for-scala-#{scala.version}
>
> but YAML's support for variable/references is pretty basic and doesn't allow
> to compose/templatize values like this. As far as I understand, you can
> only declare a reference (&ref) and reuse its value as-is later on (*ref).
>
> Any suggestions on how we could/should do this? I would really prefer to
> keep these contants out of my buildfile.
>
One option would be to have build.yml evaluated with ERB before it is parsed as
YAML. Then you could do something like
<%
scala_version = '2.8.0.Beta1-RC8-SNAPSHOT'
%>
scala.test: 1.0.1-for-scala-<%= scala_version %>
scala.check: 1.7-for-scala-<%= scala_version %>
Rhett
