[jira] [Created] (NIFI-222) Versions of extensions should have no impact on ability to pull in artifacts

["Joseph Witt (JIRA)" <ji...@apache.org>]

Joseph Witt created NIFI-222:
--------------------------------

             Summary: Versions of extensions should have no impact on ability to pull in artifacts
                 Key: NIFI-222
                 URL: https://issues.apache.org/jira/browse/NIFI-222
             Project: Apache NiFi
          Issue Type: Bug
          Components: Tools and Build
            Reporter: Bryan Bende
            Assignee: Joseph Witt


Hi all,

I'm trying to setup a Maven project for a custom nar and from looking at
the other nars I created something like the following:

1) parent project with a pom that has two modules

2) a jar project where the main code lives, the pom for this project has a
parent of the pom referenced in #1

3) a nar project that has a dependency on #2 and a parent of:
 <parent>
        <groupId>org.apache.nifi</groupId>
        <artifactId>nar-bundle-parent</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

Now all three of my poms had a version of 0.1-SNAPSHOT by default, so my
nar project had something like this:

<artifactId>example-nar</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>nar</packaging>

When I ran mvn clean install from the root, the jar built fine, and when it
hit the nar project it failed with this:

The following artifacts could not be resolved:
org.apache.nifi:nifi-api:jar:0.1-SNAPSHOT,
org.apache.nifi:nifi-processor-utils:jar:0.1-SNAPSHOT

For some reason it used the version of my nar to look for the Nifi
artifacts, even though the dependencies I had declared in the jar project
were:

<dependency>
            <groupId>org.apache.nifi</groupId>
            <artifactId>nifi-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.nifi</groupId>
            <artifactId>nifi-processor-utils</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

Then I changed the version in my nar pom from 0.1-SNAPSHOT to
0.0.1-SNAPSHOT and the build works fine and I'm able to deploy the nar no
problem.

Is this the expected behavior, or did I set these projects up wrong?

Thanks,

Bryan
++++++

As found here in maven docs:
http://maven.apache.org/guides/introduction/introduction-to-the-pom.html#Project_Aggregation

The following quote is key:

"One factor to note is that these variables are processed after inheritance as outlined above. This means that if a parent project uses a variable, then its definition in the child, not the parent, will be the one eventually used."



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