michael-o commented on a change in pull request #463:
URL: https://github.com/apache/maven/pull/463#discussion_r607034802



##########
File path: maven-embedder/src/main/java/org/apache/maven/cli/CLIManager.java
##########
@@ -121,11 +121,11 @@ public CLIManager()
         options.addOption( Option.builder( Character.toString( QUIET ) 
).longOpt( "quiet" ).desc( "Quiet output - only show errors" ).build() );
         options.addOption( Option.builder( Character.toString( DEBUG ) 
).longOpt( "debug" ).desc( "Produce execution debug output" ).build() );
         options.addOption( Option.builder( Character.toString( ERRORS ) 
).longOpt( "errors" ).desc( "Produce execution error messages" ).build() );
-        options.addOption( Option.builder( Character.toString( NON_RECURSIVE ) 
).longOpt( "non-recursive" ).desc( "Do not recurse into sub-projects" ).build() 
);
+        options.addOption( Option.builder( Character.toString( NON_RECURSIVE ) 
).longOpt( "non-recursive" ).desc( "Do not recurse into sub-projects. When used 
together with -pl, do not recurse into sub-projects of selected aggregators" 
).build() );
         options.addOption( Option.builder( Character.toString( 
UPDATE_SNAPSHOTS ) ).longOpt( "update-snapshots" ).desc( "Forces a check for 
missing releases and updated snapshots on remote repositories" ).build() );
-        options.addOption( Option.builder( Character.toString( 
ACTIVATE_PROFILES ) ).longOpt( "activate-profiles" ).desc( "Comma-delimited 
list of profiles to activate" ).hasArg().build() );
+        options.addOption( Option.builder( Character.toString( 
ACTIVATE_PROFILES ) ).longOpt( "activate-profiles" ).desc( "Comma-delimited 
list of profiles to activate. Prefixing a profile with ! excludes it, and ? 
marks it as optional" ).hasArg().build() );

Review comment:
       OK guys, let's add as-is and re-review as a whole later.




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