Is this plugin threadsafe?

[buckett]

Currently if you attempt a parallel build with projects that use this plugin you get a warning:

$ mvn -T1C install
[..snipped..]
[WARNING] *****************************************************************
[WARNING] * Your build is requesting parallel execution, but project      *
[WARNING] * contains the following plugin(s) that have goals not marked   *
[WARNING] * as @threadSafe to support parallel building.                  *
[WARNING] * While this /may/ work fine, please look for plugin updates    *
[WARNING] * and/or request plugins be made thread-safe.                   *
[WARNING] * If reporting an issue, report it against the plugin in        *
[WARNING] * question, not against maven-core                              *
[WARNING] *****************************************************************
[WARNING] The following plugins are not marked @threadSafe in Sakai Library:
[WARNING] com.github.warmuuh:libsass-maven-plugin:0.2.6-libsass_3.4.0
[WARNING] Enable debug to see more precisely which goals are not marked @threadSafe.
[WARNING] *****************************************************************

Is the plugin threadsafe and just not marked as such, or are there problems running this plugin this way?

[warmuuh]

i honestly did not look into it... i guess, it is, but did not tested it. i gladly accept any PR, if you want to spend time looking into this.

[fostersdesign]

I just noticed my Maven build that uses libsass-maven outputs a similar log message as @buckett mentioned above. I'm using 0.2.10-libsass_3.5.3 with Maven 3.6.1.

Here is a Maven page about parallel builds including a plugin checklist for "@threadsafe":
https://cwiki.apache.org/confluence/display/MAVEN/Parallel+builds+in+Maven+3

I personally don't have much experience or expertise with multi-threading, so I'm mentioning this in case someone else does.