Gradle/Ivy

> Could not resolve commons-codec:commons-codec:1.8.
  Required by:
      com.brightcove.roebuck:roebuck-rest-server:1.0-SNAPSHOT > org.apache.httpcomponents:httpclient:4.2.5
   > Could not parse Ivy file file:/Users/ahepburn/.gradle/caches/modules-2/metadata-2.13/descriptors/commons-codec/commons-codec/1.8/4471c3b2f5ea2d40ffaa8b3948cdbacd/ivy.xml
      > key can't be empty
   > Could not parse Ivy file file:/Users/ahepburn/.gradle/caches/modules-2/metadata-2.13/descriptors/commons-codec/commons-codec/1.8/daf17559c12241dfa14faa8ec744533e/ivy.xml
      > key can't be empty
   > Could not parse Ivy file file:/Users/ahepburn/.gradle/caches/modules-2/metadata-2.13/descriptors/commons-codec/commons-codec/1.8/4471c3b2f5ea2d40ffaa8b3948cdbacd/ivy.xml
      > key can't be empty
   > Could not parse Ivy file file:/Users/ahepburn/.gradle/caches/modules-2/metadata-2.13/descriptors/commons-codec/commons-codec/1.8/daf17559c12241dfa14faa8ec744533e/ivy.xml
      > key can't be empty

a sample .ivy file form the above is:

cat /Users/ahepburn/.gradle/caches/modules-2/metadata-2.13/descriptors/commons-codec/commons-codec/1.8/4471c3b2f5ea2d40ffaa8b3948cdbacd/ivy.xml

<?xml version="1.0" encoding="UTF-8"?>
<ivy-module version="2.0" xmlns:m="http://ant.apache.org/ivy/maven">
  <info organisation="commons-codec" module="commons-codec" revision="1.8" status="release" publication="20141105080718">
    <description homepage="http://commons.apache.org/proper/commons-codec/">The codec package contains simple encoder and decoders for
     various formats such as Base64 and Hexadecimal.  In addition to these
     widely used encoders and decoders, the codec package also maintains a
     collection of phonetic encoding utilities.</description>
  </info>
  <configurations>
    <conf name="default" visibility="public" description="runtime dependencies and master artifact can be used with this conf" extends="runtime,master"/>
    <conf name="master" visibility="public" description="contains only the artifact published by this module itself, with no transitive dependencies"/>
    <conf name="compile" visibility="public" description="this is the default scope, used if none is specified. Compile dependencies are available in all classpaths."/>
    <conf name="provided" visibility="public" description="this is much like compile, but indicates you expect the JDK or a container to provide it. It is only available on the compilation classpath, and is not transitive."/>
    <conf name="runtime" visibility="public" description="this scope indicates that the dependency is not required for compilation, but is for execution. It is in the runtime and test classpaths, but not the compile classpath." extends="compile"/>
    <conf name="test" visibility="private" description="this scope indicates that the dependency is not required for normal use of the application, and is only available for the test compilation and execution phases." extends="runtime"/>
    <conf name="system" visibility="public" description="this scope is similar to provided except that you have to provide the JAR which contains it explicitly. The artifact is always available and is not looked up in a repository."/>
    <conf name="sources" visibility="public" description="this configuration contains the source artifact of this module, if any."/>
    <conf name="javadoc" visibility="public" description="this configuration contains the javadoc artifact of this module, if any."/>
    <conf name="optional" visibility="public" description="contains all optional dependencies"/>
  </configurations>
  <publications/>
  <dependencies>
    <dependency org="junit" name="junit" rev="4.11" force="true" conf="test-&gt;runtime(*),master(*)"/>
  </dependencies>
</ivy-module>