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Subject: problem getting "native" dependency
From: Colin Surprenant <colin.surprenant@gmail.com>
To: ivy-user@ant.apache.org
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Hi,

I am having troubles finding the "right way" to fetch some "native"
dependencies with Ivy and I am hoping someone can point me in the
right direction.

My project has a dependency on the org-jruby:jruby-core artifact
http://mvnrepository.com/artifact/org.jruby/jruby-core/1.7.4. One of
the jruby-core dependency is com.github.jnr:jffi
http://mvnrepository.com/artifact/com.github.jnr/jffi/1.2.5 and jffi
has also a "native" artifact which I need to fetch.

By default, specifying a transitive dependency on jruby-core does not
fetch the jffi-native artifact, just the "compile" scope jar file.
jffi-native is in the "runtime" scope and so far the only way I was
able to fetch it is using this dependency declaration:

<dependency org="com.github.jnr" name="jffi" rev="1.2.5" conf="default">
  <artifact name="jffi" type="jar" />
  <artifact name="jffi" type="jar" m:classifier="native"/>
</dependency>

I tried using Ivy conf for compile and runtime but it does not fetch
jffi-native. here's what I tried:

<configurations>
  <conf name="compile" visibility="public" description="default dependencies" />
  <conf name="runtime" visibility="public" description="runtime dependencies" />
</configurations>

 <dependencies>
   <dependency org="org.jruby" name="jruby-core" rev="1.7.4"
conf="compile->default" transitive="true" />
   <dependency org="org.jruby" name="jruby-core" rev="1.7.4"
conf="runtime->default" transitive="true" />
 </dependencies>

When looking at the mvm dependency:tree we can see
com.github.jnr:jffi:jar:native:1.2.7:runtime in the "runtime" scope.

INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @ jruby-core ---
[INFO] artifact com.github.jnr:jffi: checking for updates from central
[INFO] artifact com.github.jnr:jnr-x86asm: checking for updates from central
[INFO] org.jruby:jruby-core:jar:1.7.4
[INFO] +- org.jruby:jruby-stdlib:jar:1.7.4:compile
[INFO] +- org.jruby.joni:joni:jar:2.0.0:compile
[INFO] +- com.github.jnr:jnr-netdb:jar:1.1.2:compile
[INFO] +- com.github.jnr:jnr-enxio:jar:0.4:compile
[INFO] +- com.github.jnr:jnr-unixsocket:jar:0.3:compile
[INFO] +- com.github.jnr:jnr-posix:jar:2.5.2:compile
[INFO] +- org.jruby.extras:bytelist:jar:1.0.10:compile
[INFO] +- com.github.jnr:jnr-constants:jar:0.8.4:compile
[INFO] +- org.jruby.jcodings:jcodings:jar:1.0.10:compile
[INFO] +- com.github.jnr:jffi:jar:1.2.5:compile
[INFO] +- org.yaml:snakeyaml:jar:1.11:compile
[INFO] +- jline:jline:jar:2.7:compile
[INFO] +- joda-time:joda-time:jar:2.1:compile
[INFO] +- com.jcraft:jzlib:jar:1.1.2:compile
[INFO] +- com.headius:invokebinder:jar:1.2:compile
[INFO] +- com.github.jnr:jnr-ffi:jar:1.0.4:compile
[INFO] |  +- com.github.jnr:jffi:jar:native:1.2.7:runtime
[INFO] |  \- com.github.jnr:jnr-x86asm:jar:1.0.2:compile
[INFO] +- junit:junit:jar:4.7:test
[INFO] +- bsf:bsf:jar:2.3.0:provided
[INFO] \- org.apache.ant:ant:jar:1.7.0:provided
[INFO]    \- org.apache.ant:ant-launcher:jar:1.7.0:provided

I do not understand exactly why
com.github.jnr:jffi:jar:native:1.2.7:runtime is not fetched when using
the "runtime" conf with Ivy. What am I missing here? What would be the
correct way to do this?

Thanks,
Colin