15: Create --list-plugins option

src/main/java/com/bartek/esa/cli/di/CliModule.java

@@ -1,14 +1,23 @@
 package com.bartek.esa.cli.di;
 
 import com.bartek.esa.cli.parser.CliArgsParser;
+import com.bartek.esa.cli.printer.PluginPrinter;
+import com.bartek.esa.core.archetype.Plugin;
 import dagger.Module;
 import dagger.Provides;
 
+import java.util.Set;
+
 @Module
 public class CliModule {
 
     @Provides
-    CliArgsParser cliArgsParser() {
-        return new CliArgsParser();
+    public CliArgsParser cliArgsParser(PluginPrinter pluginPrinter) {
+        return new CliArgsParser(pluginPrinter);
+    }
+
+    @Provides
+    public PluginPrinter pluginPrinter(Set<Plugin> plugins) {
+        return new PluginPrinter(plugins);
     }
 }

src/main/java/com/bartek/esa/cli/parser/CliArgsParser.java

@@ -1,6 +1,7 @@
 package com.bartek.esa.cli.parser;
 
 import com.bartek.esa.cli.model.CliArgsOptions;
+import com.bartek.esa.cli.printer.PluginPrinter;
 import com.bartek.esa.core.model.enumeration.Severity;
 import org.apache.commons.cli.*;
 
@@ -21,9 +22,14 @@ public class CliArgsParser {
     private static final String COLOR_OPT = "color";
     private static final String SEVERITIES_OPT = "severities";
     private static final String DEBUG_OPT = "debug";
+    private static final String LIST_PLUGINS_OPT = "list-plugins";
+
+    private final PluginPrinter pluginPrinter;
 
     @Inject
-    public CliArgsParser() {}
+    public CliArgsParser(PluginPrinter pluginPrinter) {
+        this.pluginPrinter = pluginPrinter;
+    }
 
     public CliArgsOptions parse(String[] args) {
         try {
@@ -43,6 +49,12 @@ public class CliArgsParser {
             return CliArgsOptions.empty();
         }
 
+        if (command.hasOption(LIST_PLUGINS_OPT)) {
+            pluginPrinter.printPlugins();
+
+            return CliArgsOptions.empty();
+        }
+
         boolean isNeitherAuditNorAnalysis = !command.hasOption(SRC_OPT) && !command.hasOption(APK_OPT);
         if (isNeitherAuditNorAnalysis) {
             printHelp();
@@ -75,6 +87,7 @@ public class CliArgsParser {
         options.addOption(color());
         options.addOption(severities());
         options.addOption(debug());
+        options.addOption(listPlugins());
         return options;
     }
 
@@ -144,4 +157,11 @@ public class CliArgsParser {
                 .desc("enable debug mode")
                 .build();
     }
+
+    private Option listPlugins() {
+        return Option.builder()
+                .longOpt(LIST_PLUGINS_OPT)
+                .desc("list available plugins")
+                .build();
+    }
 }

src/main/java/com/bartek/esa/cli/printer/PluginPrinter.java

@@ -0,0 +1,26 @@
+package com.bartek.esa.cli.printer;
+
+import com.bartek.esa.core.archetype.Plugin;
+
+import javax.inject.Inject;
+import java.util.Set;
+
+import static java.lang.String.format;
+
+public class PluginPrinter {
+    private final Set<Plugin> plugins;
+
+    @Inject
+    public PluginPrinter(Set<Plugin> plugins) {
+        this.plugins = plugins;
+    }
+
+    public void printPlugins() {
+        System.out.println("List of available plugins");
+        System.out.println(format("%-33s | Fully qualified plugin code", "Simple plugin code"));
+        plugins.stream()
+                .map(Object::getClass)
+                .map(p -> format(" - %-30s | - %s", p.getSimpleName(), p.getCanonicalName()))
+                .forEach(System.out::println);
+    }
+}