added command for auto-completing connection names and fixed bug in c…

src/main/java/sqlline/Application.java

@@ -319,6 +319,8 @@ public Collection<CommandHandler> getCommandHandlers(SqlLine sqlLine) {
         new ReflectiveCommandHandler(sqlLine, empty, "appconfig"),
         new ReflectiveCommandHandler(sqlLine, empty, "rerun", "/"),
         new ReflectiveCommandHandler(sqlLine, empty, "prompthandler"),
+        new ReflectiveCommandHandler(sqlLine, new ConnectionCompleter(sqlLine),
+            "namedconnect")
     };
     return Collections.unmodifiableList(Arrays.asList(handlers));
   }

src/main/java/sqlline/Commands.java

@@ -1277,6 +1277,17 @@ public void properties(String line, DispatchCallback callback)
     }
   }
 
+  public void namedConnect(String line, DispatchCallback callback) {
+    String example = "Usage: namedconnect <connectionname>";
+    String[] parts = sqlLine.split(line);
+    if (parts.length != 2) {
+      sqlLine.error(example);
+      return;
+    }
+    String resultline = "connect -c " + parts[1];
+    connect(resultline, callback);
+  }
+
   public void connect(String line, DispatchCallback callback) {
     String example =
         "Usage: connect [-p property value]* (-(c|cn) <connectionName> | <url>) [username] [password] [driver]"
@@ -2186,6 +2197,10 @@ public Set<String> getAllNames() {
       return allNames;
     }
   }
+
+  List<String> configuredConnectionNames() {
+    return conConfParser.getConnectionNames();
+  }
 }
 
 // End Commands.java

src/main/java/sqlline/ConnectionConfigParser.java

@@ -20,7 +20,10 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Properties;
 
@@ -64,6 +67,12 @@ void resetConnectionProperties() {
     connections.clear();
   }
 
+  List<String> getConnectionNames() {
+    List<String> result = new ArrayList<>(connections.keySet());
+    Collections.sort(result);
+    return result;
+  }
+
   private void readFromFile(Path path) {
     if (!Files.exists(path) || Files.isDirectory(path)) {
       sqlLine.error(sqlLine.loc("no-file", path.toAbsolutePath()));

src/main/java/sqlline/ConnectionConfigurationNameCompleter.java

@@ -0,0 +1,38 @@
+/*
+// Licensed to Julian Hyde under one or more contributor license
+// agreements. See the NOTICE file distributed with this work for
+// additional information regarding copyright ownership.
+//
+// Julian Hyde licenses this file to you under the Modified BSD License
+// (the "License"); you may not use this file except in compliance with
+// the License. You may obtain a copy of the License at:
+//
+// http://opensource.org/licenses/BSD-3-Clause
+*/
+package sqlline;
+
+import java.util.List;
+
+import org.jline.reader.Candidate;
+import org.jline.reader.Completer;
+import org.jline.reader.LineReader;
+import org.jline.reader.ParsedLine;
+import org.jline.reader.impl.completer.StringsCompleter;
+
+public class ConnectionConfigurationNameCompleter
+    implements Completer {
+
+  private SqlLine sqlline;
+
+  public ConnectionConfigurationNameCompleter(SqlLine sqlline) {
+    this.sqlline = sqlline;
+  }
+
+  @Override
+  public void complete(LineReader reader, ParsedLine line,
+          List<Candidate> candidates) {
+    List<String> connectionNames = sqlline.getCommands()
+         .configuredConnectionNames();
+    new StringsCompleter(connectionNames).complete(reader, line, candidates);
+  }
+}

src/main/java/sqlline/SqlLine.java

@@ -95,7 +95,7 @@ public class SqlLine {
   private static boolean initComplete = false;
 
   private final SqlLineSignalHandler signalHandler;
-  private final Completer sqlLineCommandCompleter;
+  private Completer sqlLineCommandCompleter;
 
   static {
     String testClass = "org.jline.reader.LineReader";
@@ -1971,6 +1971,9 @@ void setAppConfig(Application application) {
     setDrivers(null);
     this.application = application;
     this.appConfig = new Config(application);
+    // re-create the command line completer, since new commands can be added
+    // via setAppConfig
+    this.sqlLineCommandCompleter = new SqlLineCommandCompleter(this);
   }
 
   public HighlightStyle getHighlightStyle() {

src/main/resources/sqlline/SqlLine.properties

@@ -86,6 +86,8 @@ help-confirm: Require user to answer 'Are you sure?' before executing 'dangerous
 help-confirmPattern: Defines 'dangerous' commands that require user to answer 'Are you sure?' before proceeding (by default, DELETE and DROP)
 help-connectInteractionMode: Defines interaction mode for !connect command
 help-schemas: List all the schemas in the database
+help-namedconnect: Opens a new connection to the database from a config file
+
 variables:\
 \n\
 \nVariables:\