Added support for generating POM properties.

Projects with javaRelease specified automatically set the maven compiler properties in their POM at generation.

src/main/java/rife/bld/operations/PublishOperation.java

@@ -45,6 +45,7 @@ public class PublishOperation extends AbstractOperation<PublishOperation> {
     private final List<Repository> repositories_ = new ArrayList<>();
     private final DependencyScopes dependencies_ = new DependencyScopes();
     private PublishInfo info_ = new PublishInfo();
+    private PublishProperties properties_ = new PublishProperties();
     private final List<PublishArtifact> artifacts_ = new ArrayList<>();
 
     /**
@@ -190,7 +191,7 @@ public class PublishOperation extends AbstractOperation<PublishOperation> {
         // generate and upload pom
         executePublishStringArtifact(
             repository,
-            new PomBuilder().info(info()).dependencies(dependencies()).build(),
+            new PomBuilder().properties(properties()).info(info()).dependencies(dependencies()).build(),
             info().version() + "/" + info().artifactId() + "-" + actualVersion + ".pom", true);
     }
 
@@ -496,6 +497,11 @@ public class PublishOperation extends AbstractOperation<PublishOperation> {
      * @since 1.5.7
      */
     public PublishOperation fromProject(BaseProject project) {
+        if (project.javaRelease() != null) {
+            properties()
+                .mavenCompilerSource(project.javaRelease())
+                .mavenCompilerTarget(project.javaRelease());
+        }
         artifactRetriever(project.artifactRetriever());
         dependencies().include(project.dependencies());
         artifacts(List.of(
@@ -593,6 +599,18 @@ public class PublishOperation extends AbstractOperation<PublishOperation> {
         return this;
     }
 
+    /**
+     * Provides the publication properties.
+     *
+     * @param properties the publication properties
+     * @return this operation instance
+     * @since 1.9.2
+     */
+    public PublishOperation properties(PublishProperties properties) {
+        properties_ = properties;
+        return this;
+    }
+
     /**
      * Provides the publication info structure.
      *
@@ -667,6 +685,18 @@ public class PublishOperation extends AbstractOperation<PublishOperation> {
         return dependencies_;
     }
 
+    /**
+     * Retrieves the publication properties.
+     * <p>
+     * This is a modifiable structure that can be retrieved and changed.
+     *
+     * @return the publication properties
+     * @since 1.9.2
+     */
+    public PublishProperties properties() {
+        return properties_;
+    }
+
     /**
      * Retrieves the publication info structure.
      * <p>

src/main/java/rife/bld/publish/PomBuilder.java

@@ -22,6 +22,7 @@ import java.util.Objects;
  */
 public class PomBuilder {
     private PublishInfo info_ = null;
+    private PublishProperties properties_ = new PublishProperties();
     private DependencyScopes dependencies_ = new DependencyScopes();
 
     /**
@@ -46,6 +47,28 @@ public class PomBuilder {
         return info_;
     }
 
+    /**
+     * Provides the properties to build the POM with.
+     *
+     * @param properties the properties to use
+     * @return this {@code PomBuilder} instance
+     * @since 1.9.2
+     */
+    public PomBuilder properties(PublishProperties properties) {
+        properties_ = properties;
+        return this;
+    }
+
+    /**
+     * Retrieves the properties to build the POM with.
+     *
+     * @return the properties to use
+     * @since 1.9.2
+     */
+    public PublishProperties properties() {
+        return properties_;
+    }
+
     /**
      * Provides the dependencies to build the POM for.
      *
@@ -115,6 +138,17 @@ public class PomBuilder {
             }
         }
 
+        if (properties() != null && !properties().isEmpty()) {
+            for (var entry : properties().entrySet()) {
+                if (entry.getKey() != null) {
+                    t.setValueEncoded("property-key", entry.getKey());
+                    t.setValueEncoded("property-value", Objects.requireNonNullElse(entry.getValue(), ""));
+                    t.appendBlock("properties", "property");
+                }
+            }
+            t.setBlock("properties-tag");
+        }
+
         if (dependencies() != null && !dependencies().isEmpty()) {
             addDependencies(t, Scope.compile);
             addDependencies(t, Scope.runtime);

src/main/java/rife/bld/publish/PublishInfo.java

@@ -163,7 +163,7 @@ public class PublishInfo {
     }
 
     /**
-     * Provides the custompath to the {@code gpg} executable used for signing.
+     * Provides the custom path to the {@code gpg} executable used for signing.
      * <p>
      * By default, {@code gpg} will be used.
      *

src/main/java/rife/bld/publish/PublishProperties.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2001-2024 Geert Bevin (gbevin[remove] at uwyn dot com)
+ * Licensed under the Apache License, Version 2.0 (the "License")
+ */
+package rife.bld.publish;
+
+import java.util.*;
+
+/**
+ * Provides the properties information for publication.
+ *
+ * @author Geert Bevin (gbevin[remove] at uwyn dot com)
+ * @since 1.9.2
+ */
+public class PublishProperties extends LinkedHashMap<String, String> {
+    private static final String MAVEN_COMPILER_SOURCE = "maven.compiler.source";
+    private static final String MAVEN_COMPILER_TARGET = "maven.compiler.target";
+
+    /**
+     * Sets the value of the 'maven.compiler.source' property.
+     *
+     * @param value the value to be set for the 'maven.compiler.source' property
+     * @return this {@code PomProperties} instance
+     * @since 1.9.2
+     */
+    public PublishProperties mavenCompilerSource(Integer value) {
+        if (value == null) {
+            remove(MAVEN_COMPILER_SOURCE);
+        }
+        else {
+            put(MAVEN_COMPILER_SOURCE, String.valueOf(value));
+        }
+        return this;
+    }
+
+    /**
+     * Retrieves the value of the 'maven.compiler.source' property.
+     *
+     * @return the value of the 'maven.compiler.source' property
+     * @since 1.9.2
+     */
+    public Integer mavenCompilerSource() {
+        var value = get(MAVEN_COMPILER_SOURCE);
+        if (value == null) {
+            return null;
+        }
+        return Integer.parseInt(value);
+    }
+
+    /**
+     * Sets the value of the 'maven.compiler.target' property.
+     *
+     * @param value the value to be set for the 'maven.compiler.target' property
+     * @return this {@code PomProperties} instance
+     * @since 1.9.2
+     */
+    public PublishProperties mavenCompilerTarget(Integer value) {
+        if (value == null) {
+            remove(MAVEN_COMPILER_TARGET);
+        }
+        else {
+            put(MAVEN_COMPILER_TARGET, String.valueOf(value));
+        }
+        return this;
+    }
+
+    /**
+     * Retrieves the value of the 'maven.compiler.target' property.
+     *
+     * @return the value of the 'maven.compiler.target' property
+     * @since 1.9.2
+     */
+    public Integer mavenCompilerTarget() {
+        var value = get(MAVEN_COMPILER_TARGET);
+        if (value == null) {
+            return null;
+        }
+        return Integer.parseInt(value);
+    }
+}