create lookup command

scm-core/src/main/java/sonia/scm/repository/api/Command.java

@@ -57,5 +57,10 @@ public enum Command
   /**
    * @since 2.0
    */
-  MODIFICATIONS, MERGE, DIFF_RESULT, BRANCH, MODIFY;
+  MODIFICATIONS, MERGE, DIFF_RESULT, BRANCH, MODIFY,
+
+  /**
+   * @since 2.8.0
+   */
+  LOOKUP;
 }

scm-core/src/main/java/sonia/scm/repository/api/LookupCommandBuilder.java

@@ -0,0 +1,49 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.repository.api;
+
+import sonia.scm.repository.spi.LookupCommand;
+import sonia.scm.repository.spi.LookupCommandRequest;
+
+/**
+ * The lookup command executes a lookup for additional repository information.
+ *
+ * @since 2.8.0
+ */
+public class LookupCommandBuilder {
+
+  private final LookupCommand lookupCommand;
+  private final LookupCommandRequest request = new LookupCommandRequest();
+
+  public LookupCommandBuilder(LookupCommand lookupCommand) {
+    this.lookupCommand = lookupCommand;
+  }
+
+  public <T> T lookup(Class<T> type, String... args) {
+    request.setType(type);
+    request.setArgs(args);
+    return lookupCommand.lookup(request);
+  }
+}

scm-core/src/main/java/sonia/scm/repository/api/RepositoryService.java

@@ -429,6 +429,20 @@ public final class RepositoryService implements Closeable {
     return new ModifyCommandBuilder(provider.getModifyCommand(), workdirProvider, eMail);
   }
 
+  /**
+   * The lookup command executes a lookup which returns additional information for the repository.
+   *
+   * @return instance of {@link LookupCommandBuilder}
+   * @throws CommandNotSupportedException if the command is not supported
+   *                                      by the implementation of the repository service provider.
+   * @since 2.8.0
+   */
+  public LookupCommandBuilder getLookupCommand() {
+    LOG.debug("create lookup command for repository {}",
+      repository.getNamespaceAndName());
+    return new LookupCommandBuilder(provider.getLookupCommand());
+  }
+
   /**
    * Returns true if the command is supported by the repository service.
    *

scm-core/src/main/java/sonia/scm/repository/spi/LookupCommand.java

@@ -0,0 +1,35 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.repository.spi;
+
+public interface LookupCommand {
+
+  /**
+   * Executes lookup for given parameters.
+   * @param request Arguments provided for the lookup.
+   * @return Result of provided type.
+   */
+  <T> T lookup(LookupCommandRequest request);
+}

scm-core/src/main/java/sonia/scm/repository/spi/LookupCommandRequest.java

@@ -0,0 +1,35 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.repository.spi;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class LookupCommandRequest {
+  private Class<?> type;
+  private String[] args;
+}

scm-core/src/main/java/sonia/scm/repository/spi/RepositoryServiceProvider.java

@@ -274,4 +274,12 @@ public abstract class RepositoryServiceProvider implements Closeable
   {
     throw new CommandNotSupportedException(Command.MODIFY);
   }
+
+  /**
+   * @since 2.8.0
+   */
+  public LookupCommand getLookupCommand()
+  {
+    throw new CommandNotSupportedException(Command.LOOKUP);
+  }
 }

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/spi/SvnLookupCommand.java

@@ -0,0 +1,55 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.repository.spi;
+
+import lombok.extern.slf4j.Slf4j;
+import org.tmatesoft.svn.core.SVNException;
+import org.tmatesoft.svn.core.io.SVNRepository;
+
+import java.util.Arrays;
+
+@Slf4j
+public class SvnLookupCommand extends AbstractSvnCommand implements LookupCommand {
+
+  protected SvnLookupCommand(SvnContext context) {
+    super(context);
+  }
+
+  @Override
+  public <T> T lookup(LookupCommandRequest request) {
+    try {
+      SVNRepository repository = context.open();
+      if (request.getArgs()[0].equalsIgnoreCase("props")) {
+        if (Arrays.stream(request.getArgs()).anyMatch(a -> a.equalsIgnoreCase("uuid"))) {
+          return (T) repository.getRepositoryUUID(false);
+        }
+      }
+    } catch (SVNException | ClassCastException e) {
+      log.error("Invalid lookup request", e);
+    }
+
+    return null;
+  }
+}

scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/spi/SvnRepositoryServiceProvider.java

@@ -46,7 +46,7 @@ public class SvnRepositoryServiceProvider extends RepositoryServiceProvider
   //J-
   public static final Set<Command> COMMANDS = ImmutableSet.of(
     Command.BLAME, Command.BROWSE, Command.CAT, Command.DIFF,
-    Command.LOG, Command.BUNDLE, Command.UNBUNDLE, Command.MODIFY
+    Command.LOG, Command.BUNDLE, Command.UNBUNDLE, Command.MODIFY, Command.LOOKUP
   );
   //J+
 
@@ -156,6 +156,8 @@ public class SvnRepositoryServiceProvider extends RepositoryServiceProvider
     return new SvnModifyCommand(context, workingCopyFactory);
   }
 
+  public LookupCommand getLookupCommand() { return new SvnLookupCommand(context);}
+
   /**
    * Method description
    *