liberty:install-feature - variable-based defined includes are not resolved correctly

[LarsBesselmann]

It seems that the Liberty maven plugin does not handle default values for includes correctly during liberty:install-feature.
In liberty:install-feature, the variable-based defined includes in server.xml are only resolved correctly when the variable is defined in the bootstrap.properties.

Here the details:
Next to the server.xml, I created two files basic.xml and ldap.xml in the ${server.config.dir}/includes directory.
In my server.xml, I defined the include like this:

<variable name="AUTH_TYPE"  defaultValue="basic"/>
<include optional="false" location="${server.config.dir}/includes/${AUTH_TYPE}.xml"/>

If I define in the bootstrap.properties file the variable "AUTH_TYPE=basic" everything works fine:
mvn io.openliberty.tools:liberty-maven-plugin:dev -f "c:\myWork\WCA\vscode\Liberty-JakartaEE-mvn\pom.xml"
[INFO] Running liberty:create
[INFO] Running liberty:install-feature
...
[INFO] Parsing the server file for features and includes: defaultServer\server.xml
[INFO] Parsing the server file for features and includes: defaultServer\includes/basic.xml
[INFO] Features were included for file C:\myWork\WCA\vscode\Liberty-JakartaEE-mvn\target\liberty\wlp\usr\servers\defaultServer\includes\basic.xml

But if I do not define the variable AUTH_TYPE in the bootstrap.properties file, the liberty:install-feature does not use the default value but complains that the include file cannot be parsed:
mvn io.openliberty.tools:liberty-maven-plugin:dev -f "c:\myWork\WCA\vscode\Liberty-JakartaEE-mvn\pom.xml"
[INFO] Running liberty:create
[INFO] Running liberty:install-feature
...
[INFO] Parsing the server file for features and includes: defaultServer\server.xml
[WARNING] Unable to parse include file ${server.config.dir}/includes/${AUTH_TYPE}.xml. Skipping the included features.
...
[INFO] Running liberty:deploy
[INFO] [AUDIT ] CWWKG0028A: Processing included configuration resource: C:\myWork\WCA\vscode\Liberty-JakartaEE-mvn\target\liberty\wlp\usr\servers\defaultServer\includes\basic.xml

Environment:
--- liberty-maven-plugin:3.11.2 (edited)

[arunvenmany-ibm]

@cherylking

Currently we are not handling the logic to do variable resolution for included location while installing features

[cherylking]

@arunvenmany-ibm Can you verify that the Liberty server itself resolves the variable for the include location when installing features? We want our plugin to mimic what the Liberty server does.