Issues building external plugins (Interested in importing the MQTT plugin)

[DrNatsu]

Hi, I’m running into issues while building Apache Hop external plugins (version 2.12.0-SNAPSHOT). The build process fails specifically at the hop-external-plugins-dropbox module, and the rest of the plugins (including MQTT) are being skipped.

The key error message is:

[ERROR] Failed to execute goal on project hop-external-plugins-dropbox: Could not resolve dependencies for project org.apache.hop:hop-external-plugins-dropbox:jar:2.12.0-SNAPSHOT
[ERROR] dependency: org.apache.hop:hop-core:jar:2.12.0-SNAPSHOT (compile)
[ERROR] Could not find artifact org.apache.hop:hop-core:jar:2.12.0-SNAPSHOT in eclipse-maven-repo (https://mvnrepository.com/)
[ERROR] Could not find artifact org.apache.hop:hop-core:jar:2.12.0-SNAPSHOT in snapshot-repository.java.net (https://maven.java.net/content/repositories/snapshots/)
[ERROR] Could not find artifact org.apache.hop:hop-core:jar:2.12.0-SNAPSHOT in apache.snapshots (https://repository.apache.org/snapshots/)

It seems like Maven is unable to locate key dependencies (hop-core, hop-ui, hop-engine, etc.) in any of the defined repositories.

I’ve already cloned and built the main Apache Hop project. Is there a way to link these core components locally or correctly resolve the dependencies to proceed with building the external plugins?

[hansva]

We should change the version to a release version.
If you change the version to 2.12.0 or 2.13.0-SNAPSHOT everything should build.
The SNAPSHOT releases get cleaned up after a while so 2.12.0-SNAPSHOT is no longer available.

[DrNatsu]

As you have suggested I have done the same, but i am unable to view the step in the IDE or use it.

[bamaer]

I just updated the external plugins repository to 2.12.0 instead of the snapshot releases. Just like @hansva mentioned, I can unzip the MQTT plugins to the plugins folder and add both MQTT plugins to a pipeline.

[DrNatsu]

Does it have to do anything with Jandex Plugin? Because I commented the Line , and it should be a step which is usually skipable...
For reference, this is the error I get when i dont comment it.

[ERROR] Failed to execute goal org.jboss.jandex:jandex-maven-plugin:1.0.8:jandex (make-index) on project hop-external-plugins-mqtt: Execution make-index of goal org.jboss.jandex:jandex-maven-plugin:1.0.8:jandex failed: Cannot read the array length because "bytes" is null -> [Help 1]

[hansva]

I don't know what's going wrong in your build but lets solve it like this...
hop-external-plugins-assemblies-mqtt-2.12.0-SNAPSHOT.zip

[DrNatsu]

It works now, i see the plugin in the GUI successfully,
But does it have to do something with the hop-import.bat or the hop-run.bat file, are they responsible to importing the plugin or making it recognisable? or do they serve different functions (just to eliminate my confusion
)