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https://issues.apache.org/jira/browse/MNG-7914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17864625#comment-17864625
 ] 

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

michael-o commented on code in PR #1595:
URL: https://github.com/apache/maven/pull/1595#discussion_r1672113492


##########
maven-api-impl/src/main/java/org/apache/maven/internal/impl/DefaultToolchainsBuilder.java:
##########
@@ -57,13 +57,13 @@ public class DefaultToolchainsBuilder implements 
ToolchainsBuilder {
     public ToolchainsBuilderResult build(ToolchainsBuilderRequest request) 
throws ToolchainsBuilderException {
         List<BuilderProblem> problems = new ArrayList<>();
 
-        Source globalSource = request.getGlobalToolchainsSource().orElse(null);
-        PersistedToolchains global = readToolchains(globalSource, request, 
problems);
+        Source installSource = 
request.getInstallationToolchainsSource().orElse(null);

Review Comment:
   Same here



##########
maven-core/src/main/java/org/apache/maven/project/DefaultProjectBuilder.java:
##########
@@ -358,10 +359,7 @@ public void close() {
         private int getParallelism(ProjectBuildingRequest request) {
             int parallelism = DEFAULT_BUILDER_PARALLELISM;
             try {
-                String str = 
request.getUserProperties().getProperty(BUILDER_PARALLELISM);
-                if (str == null) {
-                    str = 
request.getSystemProperties().getProperty(BUILDER_PARALLELISM);
-                }
+                String str = 
request.getUserProperties().getProperty(Constants.MAVEN_PROJECT_BUILDER_PARALLELISM);

Review Comment:
   Very good, less dependence on system properties



##########
maven-api-impl/src/main/java/org/apache/maven/internal/impl/model/MavenBuildTimestamp.java:
##########
@@ -70,7 +67,6 @@ public MavenBuildTimestamp(Instant time, String 
timestampFormat) {
         }
         SimpleDateFormat dateFormat = new SimpleDateFormat(timestampFormat);
         dateFormat.setCalendar(new GregorianCalendar());
-        dateFormat.setTimeZone(DEFAULT_BUILD_TIME_ZONE);

Review Comment:
   Attention, this is a semantic change. We should retain `Etc/UTC` and maybe 
make it configurable in the future.



##########
maven-api-impl/src/main/java/org/apache/maven/internal/impl/DefaultSettingsBuilder.java:
##########
@@ -66,8 +66,8 @@ public class DefaultSettingsBuilder implements 
SettingsBuilder {
     public SettingsBuilderResult build(SettingsBuilderRequest request) throws 
SettingsBuilderException {
         List<BuilderProblem> problems = new ArrayList<>();
 
-        Source globalSource = request.getGlobalSettingsSource().orElse(null);
-        Settings global = readSettings(globalSource, false, request, problems);
+        Source installSource = 
request.getInstallationSettingsSource().orElse(null);

Review Comment:
   `installationSource`





> 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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