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https://issues.apache.org/jira/browse/MNG-7914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17864755#comment-17864755
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ASF GitHub Bot commented on MNG-7914:
-------------------------------------

gnodet commented on code in PR #1595:
URL: https://github.com/apache/maven/pull/1595#discussion_r1672709032


##########
maven-api-impl/src/main/java/org/apache/maven/internal/impl/model/MavenBuildTimestamp.java:
##########
@@ -26,18 +26,18 @@
 import java.util.Properties;
 import java.util.TimeZone;
 
+import org.apache.maven.api.Constants;
+
 /**
  * MavenBuildTimestamp
  */
 public class MavenBuildTimestamp {
     // ISO 8601-compliant timestamp for machine readability
-    public static final String DEFAULT_BUILD_TIMESTAMP_FORMAT = 
"yyyy-MM-dd'T'HH:mm:ss'Z'";
-
-    public static final String BUILD_TIMESTAMP_FORMAT_PROPERTY = 
"maven.build.timestamp.format";
+    public static final String DEFAULT_BUILD_TIMESTAMP_FORMAT = 
"yyyy-MM-dd'T'HH:mm:ssXXX";

Review Comment:
   `Constants.MAVEN_BUILD_TIMESTAMP_FORMAT` defines the property name.  The 
default value is available on the `@Config` annotation, but at this point, it 
is for documentation only.  
   
   Another way would be to move the default values as constants, i.e. move 
DEFAULT_BUILD_TIMESTAMP_FORMAT to `Constants` and link both there.
   





> Provide a single entry point for configuration
> ----------------------------------------------
>
>                 Key: MNG-7914
>                 URL: https://issues.apache.org/jira/browse/MNG-7914
>             Project: Maven
>          Issue Type: New Feature
>            Reporter: Guillaume Nodet
>            Priority: Major
>             Fix For: 4.0.x-candidate
>
>
> Looking at MNG-7772, this should not require any code change, but it's all 
> about configuration.
> I propose to load / interpolate the following files:
>  * {{${maven.home}/conf/maven.user.properties}}
>  * {{${maven.home}/conf/maven.system.properties}}
> Those files would be used to load additional user properties and system 
> properties for Maven.  In addition to the simple interpolation mechanism, we 
> should provide two enhancements using special keys {{{}$\{includes{}}}} and 
> {{{}$\{optionals{}}}} which would be used to load additional referenced 
> configuration files such as:
> {{    ${optionals} = ${user.home}/.m2/maven.user.properties, 
> ${session.rootDirectory}/.mvn/maven.user.properties}}
> Being loaded early when Maven is loaded, those files could reference 
> directories to load extensions from:
>   {{{}maven.core.extensions.directories = 
> ${session.rootDirectory}/.mvn/extensions.xml,{}}}{{{}${user.home}/.m2/extensions.xml,${maven.home}/extensions.xml{}}}
>  
> In various places, the maven code could be simplified and offer more 
> configuration points at the same time.



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