[JENKINS-30742] Fixed possible NPE in AbstractProject.resolveForCLI()

core/src/main/java/hudson/model/AbstractProject.java

@@ -2248,8 +2248,11 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
     public static AbstractProject resolveForCLI(
             @Argument(required=true,metaVar="NAME",usage="Job name") String name) throws CmdLineException {
         AbstractProject item = Jenkins.getInstance().getItemByFullName(name, AbstractProject.class);
-        if (item==null)
-            throw new CmdLineException(null,Messages.AbstractItem_NoSuchJobExists(name,AbstractProject.findNearest(name).getFullName()));
+        if (item==null) {
+            AbstractProject project = AbstractProject.findNearest(name);
+            throw new CmdLineException(null, project == null ? Messages.AbstractItem_NoSuchJobExistsWithoutSuggestion(name)
+                    : Messages.AbstractItem_NoSuchJobExists(name, project.getFullName()));
+        }
         return item;
     }
 

test/src/test/groovy/hudson/model/AbstractProjectTest.groovy

@@ -47,7 +47,8 @@ import hudson.triggers.Trigger
 import hudson.triggers.TriggerDescriptor;
 import hudson.util.StreamTaskListener;
 import hudson.util.OneShotEvent
-import jenkins.model.Jenkins;
+import jenkins.model.Jenkins
+import org.junit.Assert;
 import org.jvnet.hudson.test.HudsonTestCase
 import org.jvnet.hudson.test.Issue;
 import org.jvnet.hudson.test.TestExtension;
@@ -56,6 +57,7 @@ import org.jvnet.hudson.test.recipes.PresetData.DataSet
 import org.apache.commons.io.FileUtils;
 import org.junit.Assume;
 import org.jvnet.hudson.test.MockFolder
+import org.kohsuke.args4j.CmdLineException
 
 /**
  * @author Kohsuke Kawaguchi
@@ -588,6 +590,25 @@ public class AbstractProjectTest extends HudsonTestCase {
         assert project.triggers().size() == 1
     }
 
+    @Issue("JENKINS-30742")
+    public void testResolveForCLI() {
+        try {
+            AbstractProject not_found = AbstractProject.resolveForCLI("never_created");
+            fail("Exception should occur before!");
+        } catch (CmdLineException e) {
+            assert e.getMessage().contentEquals("No such job \u2018never_created\u2019 exists.");
+        }
+
+        AbstractProject project = jenkins.createProject(FreeStyleProject.class, "never_created");
+        try {
+            AbstractProject not_found = AbstractProject.resolveForCLI("never_created1");
+            fail("Exception should occur before!");
+        } catch (CmdLineException e) {
+            assert e.getMessage().contentEquals("No such job \u2018never_created1\u2019 exists. Perhaps you meant \u2018never_created\u2019?")
+        }
+
+    }
+
     static class MockBuildTriggerThrowsNPEOnStart<Item> extends Trigger {
         @Override
         public void start(hudson.model.Item project, boolean newInstance) { throw new NullPointerException(); }