Resolves mojohaus#899: Corrected the invocation of Resolver to retrie…

…ve the timestamped snapshot version; added unit tests for LockSnapshotsMojo for the case when no timestamped versions are found

versions-maven-plugin/src/it-repo/test/lock/dummy-api2-1.0.0-20230106172106-1.pom

@@ -0,0 +1,26 @@
+<!--
+  ~ Copyright MojoHaus and Contributors
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<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>test.lock</groupId>
+  <artifactId>dummy-api2</artifactId>
+  <version>1.0.0-20230106172106-1</version>
+  <packaging>pom</packaging>
+
+</project>

versions-maven-plugin/src/it-repo/test/lock/dummy-api2-1.0.0-SNAPSHOT.pom

@@ -0,0 +1,26 @@
+<!--
+  ~ Copyright MojoHaus and Contributors
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<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>test.lock</groupId>
+  <artifactId>dummy-api2</artifactId>
+  <version>1.0.0-SNAPSHOT</version>
+  <packaging>pom</packaging>
+
+</project>

versions-maven-plugin/src/it-repo/test/lock/dummy-api2/1.0.0-SNAPSHOT/maven-metadata.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metadata>
+  <groupId>test.lock</groupId>
+  <artifactId>dummy-api2</artifactId>
+  <versioning>
+    <lastUpdated>20230106172106</lastUpdated>
+    <snapshot>
+      <buildNumber>1</buildNumber>
+    </snapshot>
+    <snapshotVersions>
+      <snapshotVersion>
+        <extension>pom</extension>
+        <value>1.0.0-SNAPSHOT</value>
+        <updated>20230106172106</updated>
+      </snapshotVersion>
+    </snapshotVersions>
+  </versioning>
+  <version>1.0.0-SNAPSHOT</version>
+</metadata>

versions-maven-plugin/src/it-repo/test/lock/maven-metadata.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metadata>
+  <groupId>test.lock</groupId>
+  <artifactId>dummy-api2</artifactId>
+  <versioning>
+    <lastUpdated>20230106172106</lastUpdated>
+    <snapshot>
+      <buildNumber>1</buildNumber>
+    </snapshot>
+    <snapshotVersions>
+      <snapshotVersion>
+        <extension>pom</extension>
+        <value>1.0.0-SNAPSHOT</value>
+        <updated>20230106172106</updated>
+      </snapshotVersion>
+    </snapshotVersions>
+  </versioning>
+  <version>1.0.0-SNAPSHOT</version>
+</metadata>

versions-maven-plugin/src/it/it-lock-snapshots-junit5/invoker.properties

@@ -0,0 +1 @@
+invoker.goals = ${project.groupId}:${project.artifactId}:${project.version}:lock-snapshots

versions-maven-plugin/src/it/it-lock-snapshots-junit5/pom.xml

@@ -0,0 +1,20 @@
+<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>localhost</groupId>
+  <artifactId>it-lock-snapshots-001</artifactId>
+  <version>1.0</version>
+  <packaging>pom</packaging>
+
+  <dependencies>
+    <dependency>
+      <!-- Can't get mrm-maven-plugin to provide maven-metadata -->
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>5.0-SNAPSHOT</version>
+      <type>pom</type>
+    </dependency>
+  </dependencies>
+
+</project>

versions-maven-plugin/src/it/it-lock-snapshots-junit5/verify.groovy

@@ -0,0 +1,3 @@
+def project = new XmlSlurper().parse( new File( basedir, 'pom.xml' ) )
+
+assert !( project.dependencies.dependency.version =~ /-SNAPSHOT/ )

versions-maven-plugin/src/main/java/org/codehaus/mojo/versions/LockSnapshotsMojo.java

@@ -25,6 +25,7 @@
 import java.io.IOException;
 import java.util.Collection;
 import java.util.Map;
+import java.util.Optional;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -39,9 +40,12 @@
 import org.apache.maven.repository.RepositorySystem;
 import org.apache.maven.wagon.Wagon;
 import org.codehaus.mojo.versions.api.PomHelper;
+import org.codehaus.mojo.versions.api.VersionsHelper;
 import org.codehaus.mojo.versions.api.recording.ChangeRecorder;
 import org.codehaus.mojo.versions.rewriting.ModifiedPomXMLEventReader;
-import org.eclipse.aether.resolution.ArtifactRequest;
+import org.eclipse.aether.resolution.VersionRequest;
+import org.eclipse.aether.resolution.VersionResolutionException;
+import org.eclipse.aether.resolution.VersionResult;
 
 /**
  * Attempts to resolve unlocked snapshot dependency versions to the locked timestamp versions used in the build. For
@@ -96,13 +100,13 @@ protected void update(ModifiedPomXMLEventReader pom)
             if (getProject().getParent() != null && isProcessingParent()) {
                 lockParentSnapshot(pom, getProject().getParent());
             }
-        } catch (IOException e) {
+        } catch (IOException | VersionResolutionException e) {
             throw new MojoExecutionException(e.getMessage(), e);
         }
     }
 
-    private void lockSnapshots(ModifiedPomXMLEventReader pom, Collection<Dependency> dependencies)
-            throws XMLStreamException, MojoExecutionException {
+    protected void lockSnapshots(ModifiedPomXMLEventReader pom, Collection<Dependency> dependencies)
+            throws XMLStreamException, MojoExecutionException, VersionResolutionException {
         for (Dependency dep : dependencies) {
             if (isExcludeReactor() && isProducedByReactor(dep)) {
                 getLog().info("Ignoring reactor dependency: " + toString(dep));
@@ -121,24 +125,26 @@ private void lockSnapshots(ModifiedPomXMLEventReader pom, Collection<Dependency>
             String version = dep.getVersion();
             Matcher versionMatcher = TIMESTAMPED_SNAPSHOT_REGEX.matcher(version);
             if (versionMatcher.find() && versionMatcher.end() == version.length()) {
-                String lockedVersion = resolveSnapshotVersion(dep);
-                if (!version.equals(lockedVersion)) {
+                Optional<String> lockedVersion = resolveSnapshotVersion(dep);
+                if (lockedVersion.isPresent()) {
                     if (PomHelper.setDependencyVersion(
                             pom,
                             dep.getGroupId(),
                             dep.getArtifactId(),
                             version,
-                            lockedVersion,
+                            lockedVersion.get(),
                             getProject().getModel())) {
-                        getLog().info("Locked " + toString(dep) + " to version " + lockedVersion);
+                        getLog().info("Locked " + toString(dep) + " to version " + lockedVersion.get());
                     }
+                } else {
+                    getLog().info("No timestamped version for " + toString(dep) + " found.");
                 }
             }
         }
     }
 
-    private void lockParentSnapshot(ModifiedPomXMLEventReader pom, MavenProject parent)
-            throws XMLStreamException, MojoExecutionException {
+    protected void lockParentSnapshot(ModifiedPomXMLEventReader pom, MavenProject parent)
+            throws XMLStreamException, VersionResolutionException {
         if (parent == null) {
             getLog().info("Project does not have a parent");
             return;
@@ -154,65 +160,46 @@ private void lockParentSnapshot(ModifiedPomXMLEventReader pom, MavenProject pare
 
         Matcher versionMatcher = TIMESTAMPED_SNAPSHOT_REGEX.matcher(parentVersion);
         if (versionMatcher.find() && versionMatcher.end() == parentVersion.length()) {
-            String lockedParentVersion = resolveSnapshotVersion(parentArtifact);
-            if (!parentVersion.equals(lockedParentVersion)) {
-                if (PomHelper.setProjectParentVersion(pom, lockedParentVersion)) {
-                    getLog().info("Locked parent " + parentArtifact + " to version " + lockedParentVersion);
+            Optional<String> lockedParentVersion = resolveSnapshotVersion(parentArtifact);
+            if (lockedParentVersion.isPresent()) {
+                if (PomHelper.setProjectParentVersion(pom, lockedParentVersion.get())) {
+                    getLog().info("Locked parent " + parentArtifact + " to version " + lockedParentVersion.get());
                 }
+            } else {
+                getLog().info("No timestamped version for " + parentArtifact + " found.");
             }
         }
     }
 
     /**
      * Determine the timestamp version of the snapshot artifact used in the build.
      *
-     * @param artifact
-     * @return The timestamp version if exists, otherwise the original snapshot artifact version is returned.
+     * @param artifact artifact for which to retrieve the locked version
+     * @return The timestamp version if exists, otherwise {@link Optional#empty()}
+     * @throws VersionResolutionException thrown if version resolution fails
      */
-    private String resolveSnapshotVersion(Artifact artifact) {
+    private Optional<String> resolveSnapshotVersion(Artifact artifact) throws VersionResolutionException {
         getLog().debug("Resolving snapshot version for artifact: " + artifact);
-
-        String lockedVersion = artifact.getVersion();
-
-        try {
-            aetherRepositorySystem.resolveArtifact(
-                    session.getRepositorySession(),
-                    new ArtifactRequest(
-                            RepositoryUtils.toArtifact(artifact),
-                            getProject().getRemoteProjectRepositories(),
-                            getClass().getName()));
-
-            lockedVersion = artifact.getVersion();
-        } catch (Exception e) {
-            getLog().error(e);
-        }
-        return lockedVersion;
+        VersionResult versionResult = aetherRepositorySystem.resolveVersion(
+                session.getRepositorySession(),
+                new VersionRequest(
+                        RepositoryUtils.toArtifact(artifact),
+                        getProject().getRemoteProjectRepositories(),
+                        getClass().getSimpleName()));
+        return Optional.ofNullable(versionResult.getVersion())
+                .filter(v -> !String.valueOf(artifact.getVersion()).equals(v));
     }
 
     /**
      * Determine the timestamp version of the snapshot dependency used in the build.
      *
-     * @param dep
-     * @return The timestamp version if exists, otherwise the original snapshot dependency version is returned.
+     * @param dep dependency for which to retrieve the locked version
+     * @return The timestamp version if exists, otherwise {@link Optional#empty()}
+     * @throws MojoExecutionException thrown if retrieval of {@link VersionsHelper} fails
+     * @throws VersionResolutionException thrown if version resolution fails
      */
-    private String resolveSnapshotVersion(Dependency dep) {
-        getLog().debug("Resolving snapshot version for dependency: " + dep);
-
-        String lockedVersion = dep.getVersion();
-
-        try {
-            Artifact depArtifact = getHelper().createDependencyArtifact(dep);
-            aetherRepositorySystem.resolveArtifact(
-                    session.getRepositorySession(),
-                    new ArtifactRequest(
-                            RepositoryUtils.toArtifact(depArtifact),
-                            getProject().getRemoteProjectRepositories(),
-                            getClass().getName()));
-
-            lockedVersion = depArtifact.getVersion();
-        } catch (Exception e) {
-            getLog().error(e);
-        }
-        return lockedVersion;
+    private Optional<String> resolveSnapshotVersion(Dependency dep)
+            throws MojoExecutionException, VersionResolutionException {
+        return resolveSnapshotVersion(getHelper().createDependencyArtifact(dep));
     }
 }