kwin commented on code in PR #198:
URL: https://github.com/apache/maven-release/pull/198#discussion_r1298050608


##########
maven-release-manager/src/main/java/org/apache/maven/shared/release/phase/AbstractRewritePomsPhase.java:
##########
@@ -89,6 +93,18 @@ public abstract class AbstractRewritePomsPhase extends 
AbstractReleasePhase impl
      */
     private String modelETL = JDomModelETLFactory.NAME;
 
+    /**
+     * Regular expression pattern matching Maven expressions (i.e. references 
to Maven properties).
+     * The first group selects the property name the expression refers to.
+     */
+    private static final Pattern EXPRESSION_PATTERN = 
Pattern.compile("\\$\\{(.+)\\}");
+
+    /**
+     * All Maven properties allowed to be referenced in parent versions via 
expressions
+     * @see <a 
href="https://maven.apache.org/maven-ci-friendly.html";>CI-Friendly Versions</a>
+     */
+    private static final List<String> CI_FRIENDLY_PROPERTIES = 
Arrays.asList("revision", "sha1", "changelist");

Review Comment:
   It is available in 
https://github.com/apache/maven/blob/eff2fbf2a9baaa2178825b5745c7f152330c8946/maven-model-builder/src/main/java/org/apache/maven/model/interpolation/DefaultModelVersionProcessor.java#L38
 but it has only been introduced with 3.8.5 
(https://issues.apache.org/jira/browse/MNG-7407) so I would stick with the 
separate copy inside this class.



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