[JENKINS-11759] extension point to resolve jenkins user from SCM id

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

@@ -26,12 +26,7 @@ package hudson.model;
 
 import com.infradna.tool.bridge_method_injector.WithBridgeMethods;
 import com.thoughtworks.xstream.XStream;
-import hudson.CopyOnWrite;
-import hudson.FeedAdapter;
-import hudson.Functions;
-import hudson.Util;
-import hudson.XmlFile;
-import hudson.BulkChange;
+import hudson.*;
 import hudson.model.Descriptor.FormException;
 import hudson.model.listeners.SaveableListener;
 import hudson.security.ACL;
@@ -77,7 +72,6 @@ import java.util.logging.Level;
 import java.util.logging.Logger;
 import javax.annotation.CheckForNull;
 import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 
 /**
  * Represents a user.
@@ -295,12 +289,21 @@ public class User extends AbstractModelObject implements AccessControlled, Descr
      *      If false, this method will return null if {@link User} object
      *      with the given name doesn't exist.
      */
-    public static @Nullable User get(String idOrFullName, boolean create) {
+    public static User get(String idOrFullName, boolean create) {
+
         if(idOrFullName==null)
             return null;
-        String id = idOrFullName.replace('\\', '_').replace('/', '_').replace('<','_')
-                                .replace('>','_');  // 4 replace() still faster than regex
-        if (Functions.isWindows()) id = id.replace(':','_');
+
+        // sort resolvers by priority
+        List<CannonicalIdResolver> resolvers = new ArrayList<CannonicalIdResolver>(Jenkins.getInstance().getExtensionList(CannonicalIdResolver.class));
+        Collections.sort(resolvers);
+
+        String id = null;
+        for (CannonicalIdResolver resolver : resolvers) {
+            id = resolver.resolveCannonicalId(idOrFullName);
+            if (id != null) break;
+        }
+        // DefaultUserCannonicalIdResolver will always return a non-null id if all other CannonicalIdResolver failed
 
         String idkey = id.toLowerCase(Locale.ENGLISH);
 
@@ -635,5 +638,28 @@ public class User extends AbstractModelObject implements AccessControlled, Descr
         }
         return Collections.unmodifiableList(actions);
     }
+
+    public static abstract class CannonicalIdResolver extends AbstractDescribableImpl<CannonicalIdResolver> implements Comparable<CannonicalIdResolver> {
+
+
+        public int compareTo(CannonicalIdResolver o) {
+            // reverse priority order
+            int i = getPriority();
+            int j = o.getPriority();
+            return i>j ? -1 : (i==j ? 0:1);
+        }
+
+        /**
+         * extract user ID from idOrFullName with help from contextual infos.
+         * can return <code>null</code> if no user ID matched the input
+         */
+        public abstract String resolveCannonicalId(String idOrFullName);
+
+        public int getPriority() {
+            return 1;
+        }
+
+    }
     
 }
+

core/src/main/java/jenkins/model/DefaultUserCannonicalIdResolver.java

+/*
+ * The MIT License
+ *
+ * Copyright (c) 2004-2012, Sun Microsystems, Inc., Kohsuke Kawaguchi, Erik Ramfelt,
+ * Tom Huybrechts, Vincent Latombe
+ *
+ * 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 jenkins.model;
+
+import hudson.Extension;
+import hudson.Functions;
+import hudson.model.Descriptor;
+import hudson.model.User;
+
+/**
+ * Default User.CannonicalIdResolver to escape unsupported characters and generate user ID.
+ * Compared to other implementations, this resolver will always return an ID
+ *
+ * @author: <a hef="mailto:nicolas.deloof@gmail.com">Nicolas De Loof</a>
+*/
+@Extension
+public class DefaultUserCannonicalIdResolver extends User.CannonicalIdResolver {
+
+    @Override
+    public String resolveCannonicalId(String idOrFullName) {
+        String id = idOrFullName.replace('\\', '_').replace('/', '_').replace('<','_')
+                .replace('>', '_');  // 4 replace() still faster than regex
+        if (Functions.isWindows()) id = id.replace(':','_');
+        return id;
+    }
+
+    @Override
+    public int getPriority() {
+        return Integer.MIN_VALUE;
+    }
+
+    @Override
+    public Descriptor<User.CannonicalIdResolver> getDescriptor() {
+        return DESCRIPTOR;
+    }
+
+    public static final Descriptor<User.CannonicalIdResolver> DESCRIPTOR = new Descriptor<User.CannonicalIdResolver>() {
+        public String getDisplayName() {
+            return "compute default user ID";
+        }
+    };
+
+}