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From mattf <matt...@hotmail.com>
Subject Re: AW: How to fail if property expansion failed...
Date Fri, 22 Oct 2010 21:39:54 GMT

I was hoping to avoid introducing additional requirements, such as antcontrib
or Ivy.<p/>The list is a merge of two files, one global property list of
libs that have names that dereference to a list of jars (produced and
managed by an external program); and one local -- just part of that name.
These artifacts are introduced in ant as
<loadfile><filterchain><expandproperties/>...<p/>
Then processed by <pathconvert><path><existing/>...<p/>
Thus, the list would have pathsep, not comma; but maybe that doesn't
matter.<p/>

Jan Matèrne-2 wrote:
> 
> - you have defined a list of libraries (@classpath) which you require 
> 
Yes, sort of; a library property is a list of jars, a library-list names
those properties by name; and is passed to classpath after expansion to the
actual jars, and relative names expanded.  If the expansion fails, then the
origin list named an undeclared property, and the name-form (${name}) is
passed to classpath, indicating failure.  Now, I want ant to fail when
failure is indicated.<p/>
Isn't there something in ant core that will help?<p/>
A loop isn't actually required, and for lack of a better solution pattern
matching the whole text is also possible.
<code>
<fail message="missing library ${missing.library}">
      <condition>
        <matches pattern="libs\.(.+)\.classpath"
string="${libs.list.classpath}"/>
      </condition>
    </fail>
</code>

Will give me the full stop I desire, but how can I set the property
${missing.library} to the value of the capture at (.+)?
-- 
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