feat: support running plugins from JAR in development mode

api/src/main/java/run/halo/app/plugin/BasePlugin.java

@@ -3,6 +3,8 @@
 import lombok.extern.slf4j.Slf4j;
 import org.pf4j.Plugin;
 import org.pf4j.PluginWrapper;
+import org.springframework.lang.NonNull;
+import org.springframework.util.Assert;
 
 /**
  * This class will be extended by all plugins and serve as the common class between a plugin and
@@ -14,12 +16,46 @@
 @Slf4j
 public class BasePlugin extends Plugin {
 
+    protected PluginContext context;
+
     @Deprecated
     public BasePlugin(PluginWrapper wrapper) {
         super(wrapper);
         log.info("Initialized plugin {}", wrapper.getPluginId());
     }
 
+    /**
+     * Constructor a plugin with the given plugin context.
+     * TODO Mark {@link PluginContext} as final to prevent modification.
+     *
+     * @param pluginContext plugin context must not be null.
+     */
+    public BasePlugin(PluginContext pluginContext) {
+        this.context = pluginContext;
+    }
+
+    /**
+     * use {@link #BasePlugin(PluginContext)} instead of.
+     *
+     * @deprecated since 2.10.0
+     */
     public BasePlugin() {
     }
+
+    /**
+     * Compatible with old constructors, if the plugin is not use
+     * {@link #BasePlugin(PluginContext)} constructor then base plugin factory will use this
+     * method to set plugin context.
+     *
+     * @param context plugin context must not be null.
+     */
+    void setContext(PluginContext context) {
+        Assert.notNull(context, "Plugin context must not be null");
+        this.context = context;
+    }
+
+    @NonNull
+    public PluginContext getContext() {
+        return context;
+    }
 }

api/src/main/java/run/halo/app/plugin/PluginContext.java

@@ -0,0 +1,27 @@
+package run.halo.app.plugin;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.pf4j.RuntimeMode;
+
+/**
+ * <p>This class will provide a context for the plugin, which will be used to store some
+ * information about the plugin.</p>
+ * <p>An instance of this class is provided to plugins in their constructor.</p>
+ * <p>It's safe for plugins to keep a reference to the instance for later use.</p>
+ * <p>This class facilitates communication with application and plugin manager.</p>
+ * <p>Pf4j recommends that you use a custom PluginContext instead of PluginWrapper.</p>
+ * <a href="https://github.com/pf4j/pf4j/blob/e4d7c7b9ea0c9a32179c3e33da1403228838944f/pf4j/src/main/java/org/pf4j/Plugin.java#L46">Use application custom PluginContext instead of PluginWrapper</a>
+ *
+ * @author guqing
+ * @since 2.10.0
+ */
+@Getter
+@RequiredArgsConstructor
+public class PluginContext {
+    private final String name;
+
+    private final String version;
+
+    private final RuntimeMode runtimeMode;
+}

application/src/main/java/run/halo/app/core/extension/reconciler/PluginReconciler.java

@@ -60,6 +60,7 @@
 import run.halo.app.infra.utils.PathUtils;
 import run.halo.app.infra.utils.YamlUnstructuredLoader;
 import run.halo.app.plugin.HaloPluginManager;
+import run.halo.app.plugin.HaloPluginWrapper;
 import run.halo.app.plugin.PluginConst;
 import run.halo.app.plugin.PluginExtensionLoaderUtils;
 import run.halo.app.plugin.PluginStartingError;
@@ -184,11 +185,12 @@ Optional<Setting> lookupPluginSetting(String name, String settingName) {
         Assert.notNull(name, "Plugin name must not be null");
         Assert.notNull(settingName, "Setting name must not be null");
         PluginWrapper pluginWrapper = getPluginWrapper(name);
+        var runtimeMode = getRuntimeMode(name);
 
         var resourceLoader =
             new DefaultResourceLoader(pluginWrapper.getPluginClassLoader());
         return PluginExtensionLoaderUtils.lookupExtensions(pluginWrapper.getPluginPath(),
-                pluginWrapper.getRuntimeMode())
+                runtimeMode)
             .stream()
             .map(resourceLoader::getResource)
             .filter(Resource::exists)
@@ -215,6 +217,7 @@ boolean waitForSettingCreation(Plugin plugin) {
             return false;
         }
 
+        var runtimeMode = getRuntimeMode(pluginName);
         Optional<Setting> settingOption = lookupPluginSetting(pluginName, settingName)
             .map(setting -> {
                 // This annotation is added to prevent it from being deleted when stopped.
@@ -804,11 +807,19 @@ static String initialReverseProxyName(String pluginName) {
     }
 
     private boolean isDevelopmentMode(String name) {
-        PluginWrapper pluginWrapper = haloPluginManager.getPlugin(name);
-        RuntimeMode runtimeMode = haloPluginManager.getRuntimeMode();
-        if (pluginWrapper != null) {
-            runtimeMode = pluginWrapper.getRuntimeMode();
+        return RuntimeMode.DEVELOPMENT.equals(getRuntimeMode(name));
+    }
+
+    private RuntimeMode getRuntimeMode(String name) {
+        var pluginWrapper = haloPluginManager.getPlugin(name);
+        if (pluginWrapper == null) {
+            return haloPluginManager.getRuntimeMode();
+        }
+        if (pluginWrapper instanceof HaloPluginWrapper haloPluginWrapper) {
+            return haloPluginWrapper.getRuntimeMode();
         }
-        return RuntimeMode.DEVELOPMENT.equals(runtimeMode);
+        return Files.isDirectory(pluginWrapper.getPluginPath())
+            ? RuntimeMode.DEVELOPMENT
+            : RuntimeMode.DEPLOYMENT;
     }
 }

application/src/main/java/run/halo/app/plugin/BasePluginFactory.java

@@ -23,13 +23,17 @@ public Plugin create(PluginWrapper pluginWrapper) {
         return getPluginContext(pluginWrapper)
             .map(context -> {
                 try {
-                    return context.getBean(BasePlugin.class);
+                    var basePlugin = context.getBean(BasePlugin.class);
+                    var pluginContext = context.getBean(PluginContext.class);
+                    basePlugin.setContext(pluginContext);
+                    return basePlugin;
                 } catch (NoSuchBeanDefinitionException e) {
                     log.info(
                         "No bean named 'basePlugin' found in the context create default instance");
                     DefaultListableBeanFactory beanFactory =
                         context.getDefaultListableBeanFactory();
-                    BasePlugin pluginInstance = new BasePlugin();
+                    var pluginContext = beanFactory.getBean(PluginContext.class);
+                    BasePlugin pluginInstance = new BasePlugin(pluginContext);
                     beanFactory.registerSingleton(Plugin.class.getName(), pluginInstance);
                     return pluginInstance;
                 }

application/src/main/java/run/halo/app/plugin/HaloPluginManager.java

@@ -108,6 +108,17 @@ protected PluginDescriptorFinder createPluginDescriptorFinder() {
         return new YamlPluginDescriptorFinder();
     }
 
+    @Override
+    protected PluginWrapper createPluginWrapper(PluginDescriptor pluginDescriptor, Path pluginPath,
+        ClassLoader pluginClassLoader) {
+        // create the plugin wrapper
+        log.debug("Creating wrapper for plugin '{}'", pluginPath);
+        HaloPluginWrapper pluginWrapper =
+            new HaloPluginWrapper(this, pluginDescriptor, pluginPath, pluginClassLoader);
+        pluginWrapper.setPluginFactory(getPluginFactory());
+        return pluginWrapper;
+    }
+
     @Override
     protected void firePluginStateEvent(PluginStateEvent event) {
         rootApplicationContext.publishEvent(

application/src/main/java/run/halo/app/plugin/HaloPluginWrapper.java

@@ -0,0 +1,34 @@
+package run.halo.app.plugin;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import org.pf4j.PluginDescriptor;
+import org.pf4j.PluginManager;
+import org.pf4j.PluginWrapper;
+import org.pf4j.RuntimeMode;
+
+/**
+ * A wrapper over plugin instance for Halo.
+ *
+ * @author guqing
+ * @since 2.10.0
+ */
+public class HaloPluginWrapper extends PluginWrapper {
+
+    private final RuntimeMode runtimeMode;
+
+    /**
+     * Creates a new plugin wrapper to manage the specified plugin.
+     */
+    public HaloPluginWrapper(PluginManager pluginManager, PluginDescriptor descriptor,
+        Path pluginPath, ClassLoader pluginClassLoader) {
+        super(pluginManager, descriptor, pluginPath, pluginClassLoader);
+        this.runtimeMode = Files.isDirectory(pluginPath)
+            ? RuntimeMode.DEVELOPMENT : RuntimeMode.DEPLOYMENT;
+    }
+
+    @Override
+    public RuntimeMode getRuntimeMode() {
+        return runtimeMode;
+    }
+}

application/src/main/java/run/halo/app/plugin/PluginApplicationInitializer.java

@@ -9,6 +9,7 @@
 import java.util.Set;
 import java.util.stream.Stream;
 import lombok.extern.slf4j.Slf4j;
+import org.pf4j.PluginRuntimeException;
 import org.pf4j.PluginWrapper;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.boot.env.PropertySourceLoader;
@@ -88,6 +89,8 @@ private PluginApplicationContext createPluginApplicationContext(String pluginId)
         AnnotationConfigUtils.registerAnnotationConfigProcessors(beanFactory);
         stopWatch.stop();
 
+        beanFactory.registerSingleton("pluginContext", createPluginContext(plugin));
+        // TODO deprecated
         beanFactory.registerSingleton("pluginWrapper", haloPluginManager.getPlugin(pluginId));
 
         populateSettingFetcher(pluginId, beanFactory);
@@ -131,6 +134,15 @@ private void initApplicationContext(String pluginId) {
             stopWatch.getTotalTimeMillis(), stopWatch.prettyPrint());
     }
 
+    PluginContext createPluginContext(PluginWrapper pluginWrapper) {
+        if (pluginWrapper instanceof HaloPluginWrapper haloPluginWrapper) {
+            return new PluginContext(haloPluginWrapper.getPluginId(),
+                pluginWrapper.getDescriptor().getVersion(),
+                haloPluginWrapper.getRuntimeMode());
+        }
+        throw new PluginRuntimeException("PluginWrapper must be instance of HaloPluginWrapper");
+    }
+
     private void populateSettingFetcher(String pluginName,
         DefaultListableBeanFactory listableBeanFactory) {
         ReactiveExtensionClient extensionClient =

application/src/main/java/run/halo/app/plugin/PluginAutoConfiguration.java

@@ -5,6 +5,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Constructor;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.time.Instant;
 import lombok.extern.slf4j.Slf4j;
@@ -109,33 +110,7 @@ protected PluginLoader createPluginLoader() {
                         }
                     } else {
                         return new CompoundPluginLoader()
-                            .add(new DevelopmentPluginLoader(this) {
-
-                                @Override
-                                protected PluginClassLoader createPluginClassLoader(Path pluginPath,
-                                    PluginDescriptor pluginDescriptor) {
-                                    return new PluginClassLoader(pluginManager, pluginDescriptor,
-                                        getClass().getClassLoader(), ClassLoadingStrategy.APD);
-                                }
-
-                                @Override
-                                public ClassLoader loadPlugin(Path pluginPath,
-                                    PluginDescriptor pluginDescriptor) {
-                                    if (pluginProperties.getClassesDirectories() != null) {
-                                        for (String classesDirectory :
-                                            pluginProperties.getClassesDirectories()) {
-                                            pluginClasspath.addClassesDirectories(classesDirectory);
-                                        }
-                                    }
-                                    if (pluginProperties.getLibDirectories() != null) {
-                                        for (String libDirectory :
-                                            pluginProperties.getLibDirectories()) {
-                                            pluginClasspath.addJarsDirectories(libDirectory);
-                                        }
-                                    }
-                                    return super.loadPlugin(pluginPath, pluginDescriptor);
-                                }
-                            }, this::isDevelopment)
+                            .add(createDevelopmentPluginLoader(this), this::isDevelopment)
                             .add(new JarPluginLoader(this) {
                                 @Override
                                 public ClassLoader loadPlugin(Path pluginPath,
@@ -145,9 +120,8 @@ public ClassLoader loadPlugin(Path pluginPath,
                                             getClass().getClassLoader(), ClassLoadingStrategy.APD);
                                     pluginClassLoader.addFile(pluginPath.toFile());
                                     return pluginClassLoader;
-
                                 }
-                            }, this::isNotDevelopment);
+                            });
                     }
                 }
 
@@ -167,9 +141,8 @@ protected PluginRepository createPluginRepository() {
                         .setFixedPaths(pluginProperties.getFixedPluginPath());
                     return new CompoundPluginRepository()
                         .add(developmentPluginRepository, this::isDevelopment)
-                        .add(new JarPluginRepository(getPluginsRoots()), this::isNotDevelopment)
-                        .add(new DefaultPluginRepository(getPluginsRoots()),
-                            this::isNotDevelopment);
+                        .add(new JarPluginRepository(getPluginsRoots()))
+                        .add(new DefaultPluginRepository(getPluginsRoots()));
                 }
             };
 
@@ -181,6 +154,41 @@ protected PluginRepository createPluginRepository() {
         return pluginManager;
     }
 
+    DevelopmentPluginLoader createDevelopmentPluginLoader(PluginManager pluginManager) {
+        return new DevelopmentPluginLoader(pluginManager) {
+            @Override
+            protected PluginClassLoader createPluginClassLoader(Path pluginPath,
+                PluginDescriptor pluginDescriptor) {
+                return new PluginClassLoader(pluginManager, pluginDescriptor,
+                    getClass().getClassLoader(), ClassLoadingStrategy.APD);
+            }
+
+            @Override
+            public ClassLoader loadPlugin(Path pluginPath,
+                PluginDescriptor pluginDescriptor) {
+                if (pluginProperties.getClassesDirectories() != null) {
+                    for (String classesDirectory :
+                        pluginProperties.getClassesDirectories()) {
+                        pluginClasspath.addClassesDirectories(classesDirectory);
+                    }
+                }
+                if (pluginProperties.getLibDirectories() != null) {
+                    for (String libDirectory :
+                        pluginProperties.getLibDirectories()) {
+                        pluginClasspath.addJarsDirectories(libDirectory);
+                    }
+                }
+                return super.loadPlugin(pluginPath, pluginDescriptor);
+            }
+
+            @Override
+            public boolean isApplicable(Path pluginPath) {
+                return Files.exists(pluginPath)
+                    && Files.isDirectory(pluginPath);
+            }
+        };
+    }
+
     String getSystemVersion() {
         return systemVersionSupplier.get().getNormalVersion();
     }