Support adding plugin managed by parent

README.md

@@ -212,6 +212,22 @@ $ pom plug maven-resources-plugin
 🔌 org.apache.maven.plugins:maven-resources-plugin:1.0.0 plugged
 ```
 
+If the current POM is a child of another POM, you can add a plugin
+by simply stating the plugin's artifact ID.
+```
+$ # Add plugin managed by parent
+$ pom plug spring-boot-maven-plugin
+🔌 org.springframework.boot:spring-boot-maven-plugin:1.0.0 plugged
+```
+or, if you're starting with an empty project, you can run
+```
+pom parent parent.group:parent.artifactId:1.0.0 plug example-maven-plugin
+```
+e.g.:
+```
+pom parent org.springframework.boot:spring-boot-starter-parent plug spring-boot-maven-plugin
+```
+
 ## Building 
 
 This project requires Java 21+, GraalVM CE and Maven 3.8.4+.

src/main/java/com/github/andirady/pomcli/AddPlugin.java

@@ -15,15 +15,23 @@
  */
 package com.github.andirady.pomcli;
 
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.stream.Stream;
+
 import org.apache.maven.model.Build;
 import org.apache.maven.model.BuildBase;
 import org.apache.maven.model.Model;
+import org.apache.maven.model.Parent;
 import org.apache.maven.model.Plugin;
 import org.apache.maven.model.PluginContainer;
+import org.apache.maven.model.PluginManagement;
 import org.apache.maven.model.Profile;
 
 public class AddPlugin {
 
+    private static final int MAX_RECURSION = 10;
     private final String profileId;
 
     public AddPlugin() {
@@ -36,15 +44,16 @@ public AddPlugin(String profileId) {
 
     public Plugin addPlugin(Model model, String artifactId) {
         var plugin = new Plugin();
-        new Profile();
         plugin.setArtifactId(artifactId);
         return addPlugin(model, plugin);
     }
 
     public Plugin addPlugin(Model model, Plugin plugin) {
         if (plugin.getVersion() == null) {
-            var query = new QuerySpec(plugin.getGroupId(), plugin.getArtifactId(), null);
-            plugin.setVersion(new GetLatestVersion().execute(query).orElseThrow());
+            if (!resolvePluginManagement(model, plugin, 0)) {
+                var query = new QuerySpec(plugin.getGroupId(), plugin.getArtifactId(), null);
+                plugin.setVersion(new GetLatestVersion().execute(query).orElseThrow());
+            }
         }
 
         BuildBase build = switch (profileId) {
@@ -88,4 +97,32 @@ public Plugin addPlugin(Model model, Plugin plugin) {
         return plugin;
     }
 
+    private boolean resolvePluginManagement(Model model, Plugin plugin, int loopIndex) {
+        if (!(model.getParent() instanceof Parent parent)) {
+            return false;
+        }
+
+        var parentModel = ResolutionProvider.getInstance().readModel(parent.getGroupId(), parent.getArtifactId(),
+                parent.getVersion());
+        var managed = Optional.ofNullable(parentModel.getBuild())
+                .map(Build::getPluginManagement)
+                .filter(Objects::nonNull)
+                .map(PluginManagement::getPlugins).map(List::stream)
+                .orElseGet(Stream::of)
+                .filter(p -> p.getArtifactId().equals(plugin.getArtifactId()))
+                .findFirst()
+                .orElse(null);
+
+        if (managed != null) {
+            plugin.setGroupId(managed.getGroupId());
+            return true;
+        }
+
+        if (++loopIndex > MAX_RECURSION) {
+            throw new IllegalStateException("Exceeded max recursion of " + MAX_RECURSION);
+        }
+
+        return resolvePluginManagement(parentModel, plugin, loopIndex);
+    }
+
 }

src/test/java/com/github/andirady/pomcli/PlugCommandTest.java

@@ -15,8 +15,11 @@
  */
 package com.github.andirady.pomcli;
 
+import static java.nio.file.Files.writeString;
 import static org.junit.jupiter.api.Assertions.assertSame;
 
+import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
 
 import org.junit.jupiter.api.AfterEach;
@@ -33,7 +36,7 @@ class PlugCommandTest extends BaseTest {
     @TempDir
     Path tempDir;
 
-	@BeforeEach
+    @BeforeEach
     void setup() {
         var app = new Main();
         underTest = new CommandLine(app);
@@ -59,4 +62,25 @@ void basicUse(String input, String subexpr) throws Exception {
         var expr = "/project/build/plugins/plugin[" + subexpr + "]";
         assertXpath(pomPath, expr, 1);
     }
+
+    @ParameterizedTest
+    @CsvSource(quoteCharacter = '`', textBlock = """
+            `<project>
+              <modelVersion>4.0.0</modelVersion>
+              <parent>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-parent</artifactId>
+                <version>3.2.1</version>
+              </parent>
+              <artifactId>hello</artifactId>
+            </project>`, spring-boot-maven-plugin""")
+    void supportsManagedPlugin(String pomContent, String input) throws IOException {
+        var pomPath = writeString(tempDir.resolve("pom.xml"), pomContent);
+
+        var ec = underTest.execute("plug", "-f", pomPath.toString(), input);
+        assertSame(0, ec, "Exit code");
+
+        var expr = "/project/build/plugins/plugin[groupId='org.springframework.boot' and artifactId='spring-boot-maven-plugin']";
+        assertXpath(pomPath, expr, 1);
+    }
 }