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https://issues.apache.org/jira/browse/MNG-7914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17864694#comment-17864694
 ] 

ASF GitHub Bot commented on MNG-7914:
-------------------------------------

michael-o commented on code in PR #1595:
URL: https://github.com/apache/maven/pull/1595#discussion_r1672416637


##########
apache-maven/src/assembly/maven/conf/maven.properties:
##########
@@ -0,0 +1,40 @@
+#
+# Maven user properties
+#
+
+maven.installation.conf = ${maven.home}/conf
+maven.user.conf         = ${user.home}/.m2
+maven.project.conf      = ${session.rootDirectory}/.mvn
+
+# Comma-separated list of files to include.
+# Each item may be enclosed in quotes to gracefully include spaces. Items are 
trimmed before being loaded.
+# If the first character of an item is a question mark, the load will silently 
fail if the file does not exist.
+${includes} = "?${maven.user.conf}/maven.properties", \

Review Comment:
   Since you are quoting now the value, wouldn't it be more natural to put the 
question mark at the end? Unless you want to use "¿" as well. Maybe qoutes 
should be mandatory. Worth looking into Tomcat code for ths. I do not remember 
the motiviation.



##########
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:
   Why not use `Constants.MAVEN_BUILD_TIMESTAMP_FORMAT` instead of a literal 
again?





> 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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