eclipse-tycho · laeubi · Apr 1, 2022 · Mar 31, 2022
diff --git a/...o.p2.resolver.impl/src/main/java/org/eclipse/tycho/p2/resolver/P2ResolverFactoryImpl.java b/...o.p2.resolver.impl/src/main/java/org/eclipse/tycho/p2/resolver/P2ResolverFactoryImpl.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2008, 2020 Sonatype Inc. and others.
+ * Copyright (c) 2008, 2022 Sonatype Inc. and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -11,6 +11,7 @@
  *    Sonatype Inc. - initial API and implementation
  *    Christoph Läubrich - Bug 567098 - pomDependencies=consider should wrap non-osgi jars
  *                         Issue #443 - Use regular Maven coordinates -when possible- for dependencies 
+ *                         Issue #822 - If multiple fragments match a bundle all items are added to the classpath while only the one with the highest version should match
  *******************************************************************************/
 package org.eclipse.tycho.p2.resolver;
 
@@ -19,6 +20,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -132,11 +134,18 @@ public Set<IInstallableUnit> calculateDependencyFragments(ResolutionData data,
         if (fragmentsList.isEmpty()) {
             return Collections.emptySet();
         }
+        MavenLogger logger = mavenContext.getLogger();
+        if (logger.isExtendedDebugEnabled() && !fragmentsList.isEmpty()) {
+            logger.debug("Possible candidate fragments:");
+            for (Entry<IInstallableUnit, IRequiredCapability> fragmentEntry : fragmentsList) {
+                logger.debug(" " + fragmentEntry.getKey().toString());
+            }
+        }
 
         Map<String, List<IInstallableUnit>> resolvedUnitsById = resolvedUnits.stream()//
                 .collect(Collectors.groupingBy(iu -> iu.getId()));
 
-        return fragmentsList.stream()//
+        Map<String, List<IInstallableUnit>> matching = fragmentsList.stream()//
                 .filter(entry -> {
                     IRequiredCapability hostRequirement = entry.getValue();
                     List<IInstallableUnit> potentialHosts = resolvedUnitsById.get(hostRequirement.getName());
@@ -151,7 +160,21 @@ public Set<IInstallableUnit> calculateDependencyFragments(ResolutionData data,
                     return false;
                 })//
                 .map(entry -> entry.getKey())//
-                .collect(Collectors.toSet());
+                .collect(Collectors.groupingBy(IInstallableUnit::getId));
+        Set<IInstallableUnit> filteredResult = matching.values().stream().map(candidates -> {
+            if (candidates.size() == 1) {
+                return candidates.get(0);
+            }
+            return candidates.stream().max(Comparator.comparing(IInstallableUnit::getVersion)).get();
+        }).collect(Collectors.toSet());
+
+        if (logger.isDebugEnabled() && !filteredResult.isEmpty()) {
+            logger.info("Resolved fragments:");
+            for (IInstallableUnit unit : filteredResult) {
+                logger.info(" " + unit.toString());
+            }
+        }
+        return filteredResult;
     }
 
     private static Optional<Entry<IInstallableUnit, IRequiredCapability>> findFragmentHostRequirement(

diff --git a/tycho-its/projects/resolver.multipleDownloads/bundle1/META-INF/MANIFEST.MF b/tycho-its/projects/resolver.multipleDownloads/bundle1/META-INF/MANIFEST.MF
@@ -0,0 +1,7 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Bundle 1
+Bundle-SymbolicName: bundle1;singleton:=true
+Bundle-Version: 1.0.0.qualifier
+Bundle-RequiredExecutionEnvironment: JavaSE-11
+Require-Bundle: org.eclipse.swt;bundle-version="3.119.0"
diff --git a/tycho-its/projects/resolver.multipleDownloads/bundle1/build.properties b/tycho-its/projects/resolver.multipleDownloads/bundle1/build.properties
@@ -0,0 +1,4 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .
diff --git a/tycho-its/projects/resolver.multipleDownloads/bundle1/pom.xml b/tycho-its/projects/resolver.multipleDownloads/bundle1/pom.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.eclipse.tycho.its</groupId>
+		<artifactId>resolver-multiple-downloads-parent</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
+
+	<artifactId>bundle1</artifactId>
+	<packaging>eclipse-plugin</packaging>
+
+</project>
diff --git a/tycho-its/projects/resolver.multipleDownloads/pom.xml b/tycho-its/projects/resolver.multipleDownloads/pom.xml
@@ -0,0 +1,46 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>org.eclipse.tycho.its</groupId>
+	<artifactId>resolver-multiple-downloads-parent</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<packaging>pom</packaging>
+	<properties>
+		<tycho-version>3.0.0-SNAPSHOT</tycho-version>
+	</properties>
+
+	<modules>
+		<module>bundle1</module>
+	</modules>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.eclipse.tycho</groupId>
+				<artifactId>tycho-maven-plugin</artifactId>
+				<version>${tycho-version}</version>
+				<extensions>true</extensions>
+			</plugin>
+			<plugin>
+				<groupId>org.eclipse.tycho</groupId>
+				<artifactId>target-platform-configuration</artifactId>
+				<version>${tycho-version}</version>
+				<configuration>
+					<target>
+						<file>../test.target</file>
+					</target>
+					 <environments>
+                            <environment>
+                                <os>linux</os>
+                                <ws>gtk</ws>
+                                <arch>x86_64</arch>
+                            </environment>
+                        </environments>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
diff --git a/tycho-its/projects/resolver.multipleDownloads/sdk_4.21.target b/tycho-its/projects/resolver.multipleDownloads/sdk_4.21.target
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?pde version="3.8"?>
+<target name="Eclipse 4.21">
+	<locations>
+		<location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
+			<repository location="https://download.eclipse.org/eclipse/updates/4.21/"/>
+			<unit id="org.eclipse.platform.ide" version="4.21.0.I20210906-0500"/>
+		</location>
+	</locations>
+</target>
diff --git a/tycho-its/projects/resolver.multipleDownloads/sdk_4.22.target b/tycho-its/projects/resolver.multipleDownloads/sdk_4.22.target
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?pde version="3.8"?>
+<target name="Eclipse 4.22">
+	<locations>
+		<location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
+			<repository location="https://download.eclipse.org/eclipse/updates/4.22/"/>
+			<unit id="org.eclipse.platform.ide" version="4.22.0.I20211124-1800"/>
+		</location>
+	</locations>
+</target>
diff --git a/tycho-its/projects/resolver.multipleDownloads/sdk_4.23.target b/tycho-its/projects/resolver.multipleDownloads/sdk_4.23.target
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?pde version="3.8"?>
+<target name="Eclipse 4.23">
+	<locations>
+		<location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
+			<repository location="https://download.eclipse.org/eclipse/updates/4.23/"/>
+			<unit id="org.eclipse.platform.ide" version="4.23.0.I20220308-0310"/>
+		</location>
+	</locations>
+</target>
diff --git a/tycho-its/projects/resolver.multipleDownloads/test.target b/tycho-its/projects/resolver.multipleDownloads/test.target
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?pde version="3.8"?>
+<target name="test">
+	<locations>
+		<location type="Target" uri="file:${project_loc:/resolver-multiple-downloads-parent}/sdk_4.21.target"/>
+		<location type="Target" uri="file:${project_loc:/resolver-multiple-downloads-parent}/sdk_4.22.target"/>
+		<location type="Target" uri="file:${project_loc:/resolver-multiple-downloads-parent}/sdk_4.23.target"/>
+	</locations>
+</target>
diff --git a/tycho-its/src/test/java/org/eclipse/tycho/test/resolver/ResolverTests.java b/tycho-its/src/test/java/org/eclipse/tycho/test/resolver/ResolverTests.java
@@ -9,12 +9,21 @@
  *******************************************************************************/
 package org.eclipse.tycho.test.resolver;
 
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.util.List;
+
 import org.apache.maven.it.Verifier;
 import org.eclipse.tycho.test.AbstractTychoIntegrationTest;
 import org.junit.Test;
 
 public class ResolverTests extends AbstractTychoIntegrationTest {
 
+	private static final String SDK_23 = "org.eclipse.swt.gtk.linux.x86_64 3.119.0.v20220223-1102";
+	private static final String SDK_22 = "org.eclipse.swt.gtk.linux.x86_64 3.118.0.v20211123-0851";
+	private static final String SDK_21 = "org.eclipse.swt.gtk.linux.x86_64 3.117.0.v20210906-0842";
+
 	/**
 	 * This test case tests a combination that at a first glance looks very simple
 	 * but is hard to resolve due to the structure of 'org.eclipse.core.runtime'
@@ -53,4 +62,40 @@ public void testMixedReactor() throws Exception {
 		verifier.verifyErrorFreeLog();
 	}
 
+	@Test
+	public void testMultipleFragmentsOnlyOneIsChoosen() throws Exception {
+
+		Verifier verifier = getVerifier("resolver.multipleDownloads", false, false);
+		verifier.executeGoal("compile");
+		verifier.verifyErrorFreeLog();
+		List<String> lines = verifier.loadFile(verifier.getBasedir(), verifier.getLogFileName(), false);
+
+//        	[INFO] Resolved fragments:
+//       		[INFO]  org.eclipse.swt.gtk.linux.x86_64 3.118.0.v20211123-0851
+//       		[INFO]  org.eclipse.swt.gtk.linux.x86_64 3.119.0.v20220223-1102
+//       		[INFO]  org.eclipse.swt.gtk.linux.x86_64 3.117.0.v20210906-0842
+//       		[INFO] ------------------------------------------------------------------------
+		boolean startLine = false;
+		boolean highestVersionFound = false;
+		for (String ansiLine : lines) {
+			String line = Verifier.stripAnsi(ansiLine);
+			if (startLine) {
+				if (line.endsWith("------")) {
+					break;
+				}
+				if (line.endsWith(SDK_21)) {
+					fail("3.117 was found but should not be part of the result");
+				}
+				if (line.endsWith(SDK_22)) {
+					fail("3.118 was found but should not be part of the result");
+				}
+				highestVersionFound |= line.endsWith(SDK_23);
+			} else {
+				startLine = line.endsWith("Resolved fragments:");
+			}
+		}
+		assertTrue("Start line not found!", startLine);
+		assertTrue("Highest version was not found", highestVersionFound);
+	}
+
 }