ST6RI-836 Add option that allows changing the API basePath in a running Jupyter kernel

org.omg.sysml.interactive/src/org/omg/sysml/interactive/SysMLInteractive.java

@@ -160,6 +160,10 @@ public void setApiBasePath(String apiBasePath) {
 		this.apiBasePath = apiBasePath;
 	}
 
+	public String getApiBasePath() {
+		return apiBasePath;
+	}
+
 	public int next(String extension) {
 		this.resource = this.createResource(counter + extension);
 		this.addInputResource(this.resource);
@@ -275,6 +279,25 @@ public String help(String command) {
 				help(command, Collections.emptyList());
 	}
 
+	public String repo(String apiBasePath, List<String> help) {
+		this.counter++;
+		if (!help.isEmpty()) {
+			return SysMLInteractiveHelp.getApiBasePathHelp();
+		}
+
+		if (!Strings.isNullOrEmpty(apiBasePath)) {
+			setApiBasePath(apiBasePath);
+		}
+
+		return getApiBasePath() + "\n";
+	}
+
+	public String repo(String command) {
+		return "-h".equals(command)? 
+				repo(null, Collections.singletonList("true")):
+				repo(command, Collections.emptyList());
+	}
+
 	public String eval(String input, String targetName, List<String> help) {
 		if (Strings.isNullOrEmpty(input)) {
 			this.counter++;
@@ -466,7 +489,7 @@ protected String publish(String name) {
 	 * @return output of the command
 	 */
 	public String load(Map<String, String> parameters) {
-		counter++;
+		this.counter++;
 
 		if (parameters.containsKey(HELP_KEY)) {
 			return SysMLInteractiveHelp.getLoadHelp();
@@ -480,6 +503,9 @@ public String load(Map<String, String> parameters) {
 			return "ERROR:Branch name and id cannot be provided at the same time\n";
 		}
 
+		System.out.println("API base path: " + apiBasePath);
+		System.out.println();
+
 		final ProjectRepository repository = new ProjectRepository(apiBasePath);
 		final RemoteProject project;
 
@@ -518,10 +544,13 @@ private String load(RemoteBranch branch) {
 			return "ERROR:Branch doesn't exist\n";
 		}
 
-		System.out.println("API base path: " + apiBasePath);
-		System.out.println();
 		System.out.println("Selected branch " + branch.getName() + " (" + branch.getRemoteId().toString() + ")");
 
+		Revision headRevision = branch.getHeadRevision();
+		if (!headRevision.isRemote()) {
+			return "ERROR:Branch has no head commit\n";
+		}
+
 		if (!tracker.isLibraryTracked()) {
 			System.out.println("Caching library UUIDs...");
 			tracker.trackLibraryUUIDs(getLibraryResources());
@@ -533,9 +562,6 @@ private String load(RemoteBranch branch) {
 		tracker.trackLocalUUIDs(inputResources);
 
 		System.out.println("Downloading model...");
-
-		RemoteProject remoteProject = branch.getRemoteProject();
-		Revision headRevision = branch.getHeadRevision();
 		APIModel model = headRevision.fetchRemote();
 
 		EMFModelRefresher modelRefresher = new EMFModelRefresher(model, tracker);
@@ -549,6 +575,7 @@ private String load(RemoteBranch branch) {
 			addResourceToIndex(resource);
 		});
 
+		RemoteProject remoteProject = branch.getRemoteProject();
 		return "Loaded Project " + remoteProject.getProjectName() + " (" + remoteProject.getRemoteId().toString() + ")\n";
 	}
 
@@ -764,6 +791,8 @@ public void run() {
 								}
 							} else if ("%projects".equals(command)) {
 								System.out.print(this.projects(argument));
+							} else if ("%repo".equals(command)) {
+								System.out.print(this.repo(argument));
 							} else if ("%publish".equals(command)) {
 								if (!"".equals(argument)) {
 									System.out.print(this.publish(argument));

org.omg.sysml.interactive/src/org/omg/sysml/interactive/SysMLInteractiveHelp.java

@@ -43,6 +43,7 @@ public class SysMLInteractiveHelp {
 			+ "%help\t\tGet a list of available commands or help on a specific command\n"
 			+ "%list\t\tList loaded library packages or the results of a given query\n"
 			+ "%load\t\tLoad a model from the repository\n"
+			+ "%repo\t Set the api base path for the repository\n"
 			+ "%show\t\tPrint the abstract syntax tree rooted in a named element\n"
 			+ "%projects\tList projects in the repository\n"
 			+ "%publish\tPublish to the repository the modele elements rooted in a named element\n"
@@ -139,6 +140,14 @@ public class SysMLInteractiveHelp {
 			  "Usage: %projects\n\n"
 			+ "Print the name and identifier of all projects in the repository.\n";
 
+	private static final String API_BASE_PATH_HELP_STRING =
+			  "Usage: %repo [<BASE PATH>]\n\n"
+			+ "If <BASE PATH> is not given, print the current repository base path.\r\n"
+			+ "If <BASE PATH> is given, set the repository base path.\r\n"
+			+ "\r\n"
+			+ "<BASE PATH> is a URL giving the API base path for the repository access by the %projects, %publish and %load commands. \r\n"
+			+ "For example: https://my.domain.com/sysml_repo";
+
 	public static String getGeneralHelp() {
 		return GENERAL_HELP_STRING;
 	}
@@ -183,6 +192,10 @@ public static String getLoadHelp() {
     	return LOAD_HELP_STRING;
     }
 
+    public static String getApiBasePathHelp() {
+    	return API_BASE_PATH_HELP_STRING;
+	}
+
     private static Map<String, String> commandHelpMap = createCommandHelpMap();
 
     private static Map<String, String> createCommandHelpMap() {
@@ -197,6 +210,7 @@ private static Map<String, String> createCommandHelpMap() {
     	map.put("%export", EXPORT_HELP_STRING);
     	map.put("%load", LOAD_HELP_STRING);
     	map.put("%projects", PROJECTS_HELP_STRING);
+    	map.put("%repo", API_BASE_PATH_HELP_STRING);
 
     	return map;
     }

org.omg.sysml.jupyter.kernel/src/main/java/org/omg/sysml/jupyter/kernel/SysMLKernel.java

@@ -82,6 +82,7 @@ public SysMLKernel() {
         this.magics.registerMagics(Export.class);
         this.magics.registerMagics(Projects.class);
         this.magics.registerMagics(Load.class);
+        this.magics.registerMagics(Repo.class);
 
         this.magicParser = new MyMagicParser();
     }

org.omg.sysml.jupyter.kernel/src/main/java/org/omg/sysml/jupyter/kernel/magic/Repo.java

@@ -0,0 +1,51 @@
+/**
+ * SysML 2 Pilot Implementation
+ * Copyright (C) 2025 Model Driven Solutions, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * @license LGPL-3.0-or-later <http://spdx.org/licenses/LGPL-3.0-or-later>
+ * 
+ * Contributors:
+ *   Laszlo Gati, MDS
+ */
+package org.omg.sysml.jupyter.kernel.magic;
+
+import java.util.List;
+import java.util.Map;
+
+import org.omg.sysml.interactive.SysMLInteractive;
+import org.omg.sysml.jupyter.kernel.ISysML;
+
+import io.github.spencerpark.jupyter.kernel.magic.registry.LineMagic;
+import io.github.spencerpark.jupyter.kernel.magic.registry.MagicsArgs;
+
+public class Repo {
+
+    private static final MagicsArgs REPO_ARGS = MagicsArgs.builder().onlyKnownKeywords().onlyKnownFlags()
+    		.optional("basePath")
+            .flag("help", 'h', "true")
+    		.build();
+
+	@LineMagic("repo")
+	public static String repo(List<String> args) {
+		Map<String, List<String>> vals = REPO_ARGS.parse(args);
+		List<String> basePaths = vals.get("basePath");
+		List<String> help = vals.get("help");
+		String basePath = basePaths.isEmpty()? null: basePaths.get(0);
+
+		SysMLInteractive interactive = ISysML.getKernelInstance().getInteractive();
+		return interactive.repo(basePath, help);
+	}
+}

org.omg.sysml.jupyter.kernel/src/main/java/org/omg/sysml/jupyter/kernel/magic/View.java

@@ -63,6 +63,8 @@ public static DisplayData view(List<String> args) {
             break;
         case TEXT:
             dd.putText(vr.getText());
+		default:
+			break;
         }
         return dd;
     }

org.omg.sysml/src/org/omg/sysml/util/repository/ProjectRepository.java

@@ -185,7 +185,11 @@ public RemoteProject getPRojectById(UUID projectId) {
 			Project projectById = getProjectApi().getProjectById(projectId);
 			return projectById == null? null: new RemoteProject(this, projectId, projectById.getName());
 		} catch (ApiException e) {
-			throw new RemoteException("Error occured while trying to query the project", e);
+			if (e.getCode() == 404) {
+				return null;
+			} else {
+				throw new RemoteException("Error occured while trying to query the project", e);
+			}
 		}
 	}