Merge pull request #164 from Datical/DAT-3640

DAT-3640 Add an informational message during generateChangeLog to for…

liquibase-core/src/main/java/liquibase/command/core/GenerateChangeLogCommand.java

@@ -10,10 +10,16 @@
 import liquibase.snapshot.SnapshotControl;
 import liquibase.snapshot.SnapshotGeneratorFactory;
 import liquibase.util.StringUtils;
+import liquibase.logging.LogService;
+import liquibase.logging.LogType;
 
 import java.io.PrintStream;
 
 public class GenerateChangeLogCommand extends DiffToChangeLogCommand {
+    private static final String INFO_MESSAGE = 
+        "When generating formatted SQL changelogs, it is important to decide if batched statements\n" +
+        "should be split (splitStatements:true is the default behavior) or not (splitStatements:false).\n" +
+        "See http://liquibase.org for additional documentation.";
 
     private String author;
     private String context;
@@ -43,6 +49,12 @@ public GenerateChangeLogCommand setContext(String context) {
 
     @Override
     protected CommandResult run() throws Exception {
+        String changeLogFile = StringUtils.trimToNull(getChangeLogFile());
+        if (changeLogFile.toLowerCase().endsWith(".sql")) {
+          System.out.println("\n" + INFO_MESSAGE + "\n");
+          LogService.getLog(getClass()).info(LogType.LOG, "\n" + INFO_MESSAGE + "\n");
+        }
+
         SnapshotCommand.logUnsupportedDatabase(this.getReferenceDatabase(), this.getClass());
 
         DiffResult diffResult = createDiffResult();