michael-o commented on issue #813:
URL: https://github.com/apache/maven-mvnd/issues/813#issuecomment-1500603572

   > > > > > Ok, so add `-Dlogback.configurationFile=​logback.​xml` to 
`maven.config`? Will that always find `.mvn/logback.xml`?
   > > > > 
   > > > > 
   > > > > This is wrong! What you want is a system property, but 
`maven.config` is _only_ about Maven user properties. You must use `jvm.config` 
for this.
   > > > 
   > > > 
   > > > That's irrelevant. The question is the same with `jvm.config`... Or 
that mean that there's a need for yet another level of property, which may 
become a bit too much...
   > > 
   > > 
   > > I wouldn't say so because both files are processed in completely 
different ways. This matters.
   > 
   > This is purely a technical problem however. Some system properties can be 
set before the JVM is started (using `-Dxxx` options on the JVM command line), 
others can be set by the java code using `System.setProperty`. Both may need to 
be supported, and splitting completely user properties from system properties 
(i.e. not setting user properties as system properties) may open the need for 
properties to be set by maven early (i.e. same time as user properties atm).
   
   Correct. My point was to clarify for/with the user that he is not 
interacting with system properties actually.


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