feat: allow to export only specific client secrets (#36)

src/main/java/com/cycrilabs/keycloak/configurator/commands/secrets/boundary/ExportSecrets.java

@@ -7,9 +7,11 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -51,7 +53,8 @@ public void init() {
     public void export() throws IOException, ParseException, URISyntaxException {
         final Collection<Template> templates = VelocityUtils.loadTemplates(loadTemplateFiles());
         final Map<String, ClientRepresentation> clients = loadClients();
-        for (final ClientRepresentation client : clients.values()) {
+        final Collection<ClientRepresentation> filteredClients = getFilteredClients(clients);
+        for (final ClientRepresentation client : filteredClients) {
             // skip all clients without a secret
             if (StringUtil.isBlank(client.getSecret())) {
                 continue;
@@ -77,6 +80,18 @@ private Map<String, ClientRepresentation> loadClients() {
                 .collect(Collectors.toMap(ClientRepresentation::getClientId, Function.identity()));
     }
 
+    private Collection<ClientRepresentation> getFilteredClients(
+            final Map<String, ClientRepresentation> clients) {
+        if (StringUtil.isBlank(configuration.getClientIds())) {
+            return clients.values();
+        }
+        final String[] split = configuration.getClientIds().split(",");
+        return Arrays.stream(split)
+                .map(clients::get)
+                .filter(Objects::nonNull)
+                .collect(Collectors.toSet());
+    }
+
     /**
      * Derives all templates that must be expanded for the given client.
      *

src/main/java/com/cycrilabs/keycloak/configurator/commands/secrets/control/ExportSecretsCommand.java

@@ -19,6 +19,9 @@ public class ExportSecretsCommand implements Runnable {
     @CommandLine.Option(required = true, names = { "-c", "--config" },
             description = "Directory containing templates for secret output files.")
     String configDirectory;
+    @CommandLine.Option(names = { "-n", "--client-ids" },
+            description = "Comma separated list of client IDs to export secrets for.")
+    String clientIds;
     @CommandLine.Option(names = { "-o", "--output" }, defaultValue = "./",
             description = "Output directory for generate files.")
     String outputDirectory;

src/main/java/com/cycrilabs/keycloak/configurator/commands/secrets/entity/ExportSecretsCommandConfiguration.java

@@ -10,12 +10,14 @@
 public class ExportSecretsCommandConfiguration extends KeycloakConfiguration {
     private final String realmName;
     private final String configDirectory;
+    private final String clientIds;
     private final String outputDirectory;
 
     public ExportSecretsCommandConfiguration(final ParseResult parseResult) {
         super(parseResult);
         realmName = getMatchedOption(parseResult, "-r");
         configDirectory = getMatchedOption(parseResult, "-c");
+        clientIds = getMatchedOption(parseResult, "-n");
         outputDirectory = getMatchedOption(parseResult, "-o");
     }
 }