Add show/hide validation event filtering to CLI

The --show-validators and --hide-validators can now be used in the CLI
anywhere that --severity was being used. This allows validation events
to be hidden/show explicitly based on a comma separated list of
heirarchical validation event IDs (i.e., dot based prefix event
matching just like suppressions).

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/AstCommand.java

@@ -86,7 +86,7 @@ private int runWithClassLoader(SmithyBuildConfig config, Arguments arguments, En
                 .models(arguments.getPositional())
                 .validationPrinter(env.stderr())
                 .validationMode(Validator.Mode.QUIET)
-                .severity(Severity.DANGER)
+                .defaultSeverity(Severity.DANGER)
                 .build();
 
         ModelSerializer serializer = ModelSerializer.builder().build();

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/BuildCommand.java

@@ -72,7 +72,7 @@ public String getSummary() {
     public int execute(Arguments arguments, Env env) {
         arguments.addReceiver(new ConfigOptions());
         arguments.addReceiver(new DiscoveryOptions());
-        arguments.addReceiver(new SeverityOption());
+        arguments.addReceiver(new ValidatorOptions());
         arguments.addReceiver(new BuildOptions());
         arguments.addReceiver(new Options());
 

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/DiffCommand.java

@@ -65,7 +65,7 @@ public String getSummary() {
     @Override
     public int execute(Arguments arguments, Env env) {
         arguments.addReceiver(new ConfigOptions());
-        arguments.addReceiver(new SeverityOption());
+        arguments.addReceiver(new ValidatorOptions());
         arguments.addReceiver(new BuildOptions());
         arguments.addReceiver(new Options());
         arguments.getReceiver(BuildOptions.class).noPositionalArguments(true);
@@ -317,7 +317,7 @@ protected final ModelBuilder createModelBuilder(SmithyBuildConfig config, Argume
                     .validationPrinter(env.stderr())
                     // Only report issues that fail the build.
                     .validationMode(Validator.Mode.QUIET_CORE_ONLY)
-                    .severity(Severity.DANGER);
+                    .defaultSeverity(Severity.DANGER);
         }
 
         // Creating a new model is the same for each diff mode.
@@ -336,7 +336,7 @@ protected final void runDiff(ModelBuilder builder, Env env, Model oldModel, Mode
             builder
                     .titleLabel("DIFF", ColorTheme.DIFF_TITLE)
                     .validatedResult(new ValidatedResult<>(newModel, events))
-                    .severity(null) // reset so it takes on standard option settings.
+                    .defaultSeverity(null) // reset so it takes on standard option settings.
                     .build();
         }
 

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/MigrateCommand.java

@@ -152,7 +152,7 @@ private int run(Arguments arguments, Env env) {
                 .env(env)
                 .models(models)
                 .validationPrinter(env.stderr())
-                .severity(Severity.DANGER)
+                .defaultSeverity(Severity.DANGER)
                 .build();
 
         SmithyBuild smithyBuild = SmithyBuild.create(classLoader)

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/ModelBuilder.java

@@ -57,7 +57,7 @@ final class ModelBuilder {
     private List<String> models;
     private Command.Env env;
     private SmithyBuildConfig config;
-    private Severity severity;
+    private Severity defaultSeverity;
     private ValidatedResult<Model> validatedResult;
     private String titleLabel;
     private Style[] titleLabelStyles;
@@ -94,8 +94,8 @@ public ModelBuilder config(SmithyBuildConfig config) {
         return this;
     }
 
-    public ModelBuilder severity(Severity severity) {
-        this.severity = severity;
+    public ModelBuilder defaultSeverity(Severity defaultSeverity) {
+        this.defaultSeverity = defaultSeverity;
         return this;
     }
 
@@ -123,7 +123,13 @@ public Model build() {
 
         StandardOptions standardOptions = arguments.getReceiver(StandardOptions.class);
         BuildOptions buildOptions = arguments.getReceiver(BuildOptions.class);
-        Severity minSeverity = resolveMinSeverity(standardOptions);
+
+        // Resolve validator options and severity.
+        ValidatorOptions validatorOptions = arguments.hasReceiver(ValidatorOptions.class)
+                ? arguments.getReceiver(ValidatorOptions.class)
+                : new ValidatorOptions();
+        resolveMinSeverity(standardOptions, validatorOptions);
+
         ClassLoader classLoader = env.classLoader();
         ColorFormatter colors = env.colors();
         CliPrinter stderr = env.stderr();
@@ -176,8 +182,8 @@ public Model build() {
 
         for (ValidationEvent event : sortedEvents) {
             // Only log events that are >= --severity. Note that setting --quiet inherently
-            // configures events to need to be >= DANGER.
-            if (event.getSeverity().ordinal() >= minSeverity.ordinal()) {
+            // configures events to need to be >= DANGER. Also filter using --show-validators and --hide-validators.
+            if (validatorOptions.isVisible(event)) {
                 validationPrinter.println(formatter.format(event));
             }
         }
@@ -274,14 +280,11 @@ private static void discoverModelsWithClasspath(String rawClasspath, ModelAssemb
     }
 
     // Determine a default severity if one wasn't given, by inspecting if there is a --severity option.
-    private Severity resolveMinSeverity(StandardOptions standardOptions) {
-        if (severity != null) {
-            return severity;
-        } else if (arguments.hasReceiver(SeverityOption.class)) {
-            return arguments.getReceiver(SeverityOption.class).severity(standardOptions);
-        } else {
-            return Severity.WARNING;
+    private Severity resolveMinSeverity(StandardOptions standardOptions, ValidatorOptions validatorOption) {
+        if (defaultSeverity != null && validatorOption.severity() == null) {
+            validatorOption.severity(defaultSeverity);
         }
+        return validatorOption.detectAndGetSeverity(standardOptions);
     }
 
     static ModelAssembler createModelAssembler(ClassLoader classLoader) {

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/SelectCommand.java

@@ -232,7 +232,7 @@ private int runWithClassLoader(SmithyBuildConfig config, Arguments arguments, En
                 .models(arguments.getPositional())
                 .validationPrinter(env.stderr())
                 .validationMode(Validator.Mode.QUIET_CORE_ONLY)
-                .severity(Severity.DANGER)
+                .defaultSeverity(Severity.DANGER)
                 .build();
 
         Options options = arguments.getReceiver(Options.class);

smithy-cli/src/main/java/software/amazon/smithy/cli/commands/ValidateCommand.java

@@ -46,7 +46,7 @@ public String getSummary() {
     public int execute(Arguments arguments, Env env) {
         arguments.addReceiver(new ConfigOptions());
         arguments.addReceiver(new DiscoveryOptions());
-        arguments.addReceiver(new SeverityOption());
+        arguments.addReceiver(new ValidatorOptions());
         arguments.addReceiver(new BuildOptions());
 
         CommandAction action = HelpActionWrapper.fromCommand(