Configure more version alignment for Spring Data dependencies

Closes gh-45698

Author: wilkinsona

buildSrc/src/main/java/org/springframework/boot/build/bom/BomExtension.java

@@ -38,13 +38,17 @@
 import org.gradle.api.model.ObjectFactory;
 import org.gradle.api.plugins.JavaPlatformPlugin;
 
+import org.springframework.boot.build.bom.BomExtension.LibraryHandler.AlignWithHandler.PropertyHandler;
+import org.springframework.boot.build.bom.BomExtension.LibraryHandler.AlignWithHandler.VersionHandler;
+import org.springframework.boot.build.bom.Library.DependencyVersionAlignment;
 import org.springframework.boot.build.bom.Library.Exclusion;
 import org.springframework.boot.build.bom.Library.Group;
 import org.springframework.boot.build.bom.Library.ImportedBom;
 import org.springframework.boot.build.bom.Library.LibraryVersion;
 import org.springframework.boot.build.bom.Library.Link;
 import org.springframework.boot.build.bom.Library.Module;
 import org.springframework.boot.build.bom.Library.PermittedDependency;
+import org.springframework.boot.build.bom.Library.PomPropertyVersionAlignment;
 import org.springframework.boot.build.bom.Library.ProhibitedVersion;
 import org.springframework.boot.build.bom.Library.VersionAlignment;
 import org.springframework.boot.build.bom.bomr.version.DependencyVersion;
@@ -106,16 +110,26 @@ public void library(String name, String version, Action<LibraryHandler> action)
 				(version != null) ? version : "");
 		action.execute(libraryHandler);
 		LibraryVersion libraryVersion = new LibraryVersion(DependencyVersion.parse(libraryHandler.version));
-		VersionAlignment versionAlignment = (libraryHandler.alignWith.version != null)
-				? new VersionAlignment(libraryHandler.alignWith.version.from,
-						libraryHandler.alignWith.version.managedBy, this.project, this.libraries, libraryHandler.groups)
-				: null;
 		addLibrary(new Library(name, libraryHandler.calendarName, libraryVersion, libraryHandler.groups,
-				libraryHandler.prohibitedVersions, libraryHandler.considerSnapshots, versionAlignment,
+				libraryHandler.prohibitedVersions, libraryHandler.considerSnapshots, versionAlignment(libraryHandler),
 				libraryHandler.alignWith.dependencyManagementDeclaredIn, libraryHandler.linkRootName,
 				libraryHandler.links));
 	}
 
+	private VersionAlignment versionAlignment(LibraryHandler libraryHandler) {
+		VersionHandler version = libraryHandler.alignWith.version;
+		if (version != null) {
+			return new DependencyVersionAlignment(version.from, version.managedBy, this.project, this.libraries,
+					libraryHandler.groups);
+		}
+		PropertyHandler property = libraryHandler.alignWith.property;
+		if (property != null) {
+			return new PomPropertyVersionAlignment(property.name, property.of, property.managedBy, this.project,
+					this.libraries);
+		}
+		return null;
+	}
+
 	private String createDependencyNotation(String groupId, String artifactId, DependencyVersion version) {
 		return groupId + ":" + artifactId + ":" + version;
 	}
@@ -383,13 +397,20 @@ public static class AlignWithHandler {
 
 			private VersionHandler version;
 
+			private PropertyHandler property;
+
 			private String dependencyManagementDeclaredIn;
 
 			public void version(Action<VersionHandler> action) {
 				this.version = new VersionHandler();
 				action.execute(this.version);
 			}
 
+			public void property(Action<PropertyHandler> action) {
+				this.property = new PropertyHandler();
+				action.execute(this.property);
+			}
+
 			public void dependencyManagementDeclaredIn(String bomCoordinates) {
 				this.dependencyManagementDeclaredIn = bomCoordinates;
 			}
@@ -410,6 +431,28 @@ public void managedBy(String managedBy) {
 
 			}
 
+			public static class PropertyHandler {
+
+				private String name;
+
+				private String of;
+
+				private String managedBy;
+
+				public void name(String name) {
+					this.name = name;
+				}
+
+				public void of(String dependency) {
+					this.of = dependency;
+				}
+
+				public void managedBy(String managedBy) {
+					this.managedBy = managedBy;
+				}
+
+			}
+
 		}
 
 	}

buildSrc/src/main/java/org/springframework/boot/build/bom/Library.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.build.bom;
 
+import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -31,13 +32,19 @@
 import java.util.regex.Pattern;
 import java.util.stream.Stream;
 
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathFactory;
+
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
 import org.apache.maven.artifact.versioning.VersionRange;
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.Dependency;
 import org.gradle.api.artifacts.result.DependencyResult;
 import org.gradle.api.artifacts.result.ResolutionResult;
+import org.w3c.dom.Document;
 
 import org.springframework.boot.build.bom.bomr.version.DependencyVersion;
 
@@ -406,10 +413,16 @@ public String getArtifactId() {
 
 	}
 
+	public interface VersionAlignment {
+
+		Set<String> resolve();
+
+	}
+
 	/**
-	 * Version alignment for a library.
+	 * Version alignment for a library based on a dependency of another module.
 	 */
-	public static class VersionAlignment {
+	public static class DependencyVersionAlignment implements VersionAlignment {
 
 		private final String from;
 
@@ -423,14 +436,16 @@ public static class VersionAlignment {
 
 		private Set<String> alignedVersions;
 
-		VersionAlignment(String from, String managedBy, Project project, List<Library> libraries, List<Group> groups) {
+		DependencyVersionAlignment(String from, String managedBy, Project project, List<Library> libraries,
+				List<Group> groups) {
 			this.from = from;
 			this.managedBy = managedBy;
 			this.project = project;
 			this.libraries = libraries;
 			this.groups = groups;
 		}
 
+		@Override
 		public Set<String> resolve() {
 			if (this.alignedVersions != null) {
 				return this.alignedVersions;
@@ -539,6 +554,100 @@ public String toString() {
 
 	}
 
+	/**
+	 * Version alignment for a library based on a property in the pom of another module.
+	 */
+	public static class PomPropertyVersionAlignment implements VersionAlignment {
+
+		private final String name;
+
+		private final String from;
+
+		private final String managedBy;
+
+		private final Project project;
+
+		private final List<Library> libraries;
+
+		private Set<String> alignedVersions;
+
+		PomPropertyVersionAlignment(String name, String from, String managedBy, Project project,
+				List<Library> libraries) {
+			this.name = name;
+			this.from = from;
+			this.managedBy = managedBy;
+			this.project = project;
+			this.libraries = libraries;
+		}
+
+		@Override
+		public Set<String> resolve() {
+			if (this.alignedVersions != null) {
+				return this.alignedVersions;
+			}
+			Configuration alignmentConfiguration = this.project.getConfigurations()
+				.detachedConfiguration(getAligningDependencies().toArray(new Dependency[0]));
+			Set<File> files = alignmentConfiguration.resolve();
+			if (files.size() != 1) {
+				throw new IllegalStateException(
+						"Expected a single file when resolving the pom of " + this.from + " but found " + files.size());
+			}
+			File pomFile = files.iterator().next();
+			return Set.of(propertyFrom(pomFile));
+		}
+
+		private List<Dependency> getAligningDependencies() {
+			Library managingLibrary = findManagingLibrary();
+			List<Dependency> boms = getBomDependencies(managingLibrary);
+			List<Dependency> dependencies = new ArrayList<>();
+			dependencies.addAll(boms);
+			dependencies.add(this.project.getDependencies().create(this.from + "@pom"));
+			return dependencies;
+		}
+
+		private Library findManagingLibrary() {
+			if (this.managedBy == null) {
+				return null;
+			}
+			return this.libraries.stream()
+				.filter((candidate) -> this.managedBy.equals(candidate.getName()))
+				.findFirst()
+				.orElseThrow(() -> new IllegalStateException("Managing library '" + this.managedBy + "' not found."));
+		}
+
+		private List<Dependency> getBomDependencies(Library manager) {
+			return manager.getGroups()
+				.stream()
+				.flatMap((group) -> group.getBoms()
+					.stream()
+					.map((bom) -> this.project.getDependencies()
+						.platform(group.getId() + ":" + bom.name() + ":" + manager.getVersion().getVersion())))
+				.toList();
+		}
+
+		private String propertyFrom(File pomFile) {
+			try {
+				DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
+				Document document = documentBuilder.parse(pomFile);
+				XPath xpath = XPathFactory.newInstance().newXPath();
+				return xpath.evaluate("/project/properties/" + this.name + "/text()", document);
+			}
+			catch (Exception ex) {
+				throw new RuntimeException(ex);
+			}
+		}
+
+		@Override
+		public String toString() {
+			String result = "version from properties of " + this.from;
+			if (this.managedBy != null) {
+				result += " that is managed by " + this.managedBy;
+			}
+			return result;
+		}
+
+	}
+
 	public record Link(String rootName, Function<LibraryVersion, String> factory, List<String> packages) {
 
 		private static final Pattern PACKAGE_EXPAND = Pattern.compile("^(.*)\\[(.*)\\]$");

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -939,6 +939,13 @@ bom {
 		}
 	}
 	library("Jedis", "5.0.2") {
+		alignWith {
+			property {
+				name "jedis"
+				of "org.springframework.data:spring-data-redis"
+				managedBy "Spring Data Bom"
+			}
+		}
 		group("redis.clients") {
 			modules = [
 				"jedis"
@@ -1150,6 +1157,13 @@ bom {
 		}
 	}
 	library("Lettuce", "6.3.2.RELEASE") {
+		alignWith {
+			property {
+				name "lettuce"
+				of "org.springframework.data:spring-data-redis"
+				managedBy "Spring Data Bom"
+			}
+		}
 		group("io.lettuce") {
 			modules = [
 				"lettuce-core"
@@ -1452,6 +1466,12 @@ bom {
 		}
 	}
 	library("MongoDB", "5.0.1") {
+		alignWith {
+			version {
+				from "org.springframework.data:spring-data-mongodb"
+				managedBy "Spring Data Bom"
+			}
+		}
 		group("org.mongodb") {
 			modules = [
 				"bson",