Update registrar usage forms in its help function & update docs

common/src/main/java/com/google/udmi/util/CommandLineProcessor.java

@@ -28,6 +28,7 @@ public class CommandLineProcessor {
   private static final int LINUX_ERROR_CODE = -1;
   private final Object target;
   private final Method showHelpMethod;
+  private List<String> usageForms = null;
 
   Map<CommandLineOption, Method> optionMap = new TreeMap<>(
       (a, b) -> CASE_INSENSITIVE_ORDER.compare(getSortArg(a), getSortArg(b)));
@@ -69,6 +70,13 @@ public CommandLineProcessor(Object target) {
     checkState(duplicateLong.isEmpty(), "duplicate short form command line option");
   }
 
+  public CommandLineProcessor(Object target, List<String> usageForms) {
+    this(target);
+    if (usageForms != null && !usageForms.isEmpty()) {
+      this.usageForms = usageForms;
+    }
+  }
+
   private Method getShowHelpMethod() {
     try {
       return CommandLineProcessor.class.getDeclaredMethod("showUsage");
@@ -91,6 +99,10 @@ private void showUsage() {
    */
   public void showUsage(String message) {
     ifNotNullThen(message, m -> System.err.println(m));
+    ifNotNullThen(this.usageForms, () -> {
+      System.err.println("Usage forms:");
+      this.usageForms.forEach(form -> System.err.printf("    %s%n", form));
+    });
     System.err.println("Options supported:");
     optionMap.forEach((option, method) -> System.err.printf("  %s %12s  %s%n",
         option.short_form(), option.arg_name(), option.description()));

docs/tools/registrar.md

@@ -39,22 +39,33 @@ be used to specific specific device(s) to register (rather than all).
 ```
 Usage:
 
-bin/registrar site_path [project_id] [options] [devices...]
+bin/registrar site_model project_spec [options] [devices...]
 
-bin/registrar config_file
+bin/registrar site_spec [options] [devices...]
 ```
 
-* `config_file`: Path to a configuration file which contains configuration options;
-* `site_path`: The _directory_ containing the site model, or a model-with-project _file_ directly.
-* `project_id`: The project ID that contains the target registry. The project ID can be prepended with iot_provider:
+* `site_model`: The path to the _directory_ containing the site model, or a model-with-project _file_ directly.
+* `project_spec`: The project ID that contains the target registry. The project ID can be prepended with iot_provider:
   * `//clearblade/PROJECT_ID` for a public ClearBlade project.
   * `//gbos/PROJECT_ID` for a Google operated ClearBlade project.
+* `site_spec`: Path to a configuration file which contains configuration options;
 * `options`: Various options to impact behavior:
-  * `-u` Update.
-  * `-d` Delete all device in the site model from the registry (combine with `-x` to delete all devices from the registry)
+  * `-a` Set alternate registry 
   * `-b` Block unknown devices.
-  * `-x` Delete unknown devices from the registry.
+  * `-c` Count of registries to be created
+  * `-d` Delete all device in the site model from the registry (combine with `-x` to delete all devices from the registry)
+  * `-e` Set registry suffix
+  * `-f` Set PubSub feed topic
+  * `-h` Show help and exit
+  * `-l` Set idle limit
+  * `-m` Initial metadata model out
   * `-n` Number of thread counts.
+  * `-p` Set Project ID
+  * `-q` Query only, registry to not be updated
+  * `-r` Set tool root path
+  * `-s` Set site path
+  * `-t` Do not validate metadata
+  * `-x` Delete unknown devices from the registry.
 * `devices`: Multiple device entries for limited registration. Can be just the device name
   (`AHU-12`), or path to device (`site/devices/AHU-12`) for use with file-name glob.
 

validator/src/main/java/com/google/daq/mqtt/registrar/Registrar.java

@@ -45,6 +45,7 @@
 import com.github.fge.jsonschema.main.JsonSchema;
 import com.github.fge.jsonschema.main.JsonSchemaFactory;
 import com.google.common.base.Joiner;
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Sets.SetView;
@@ -130,7 +131,11 @@ public class Registrar {
   private final Map<String, JsonSchema> schemas = new HashMap<>();
   private final String generation = JsonUtil.isoConvert();
   private final Set<Summarizer> summarizers = new HashSet<>();
-  private final CommandLineProcessor commandLineProcessor = new CommandLineProcessor(this);
+  private final List<String> usageForms = ImmutableList.of(
+      "bin/registrar site_model project_spec [options] [devices...]",
+      "bin/registrar site_spec [options] [devices...]");
+  private final CommandLineProcessor commandLineProcessor = new CommandLineProcessor(this,
+      usageForms);
   private CloudIotManager cloudIotManager;
   private File schemaBase;
   private PubSubPusher updatePusher;