Groovy REPL: configure parser comment delimiters

Author: mattirn

console/src/main/java/org/jline/console/impl/SystemRegistryImpl.java

@@ -837,8 +837,8 @@ private static class ArgsParser {
         private boolean quoted;
         private boolean doubleQuoted;
         private String line;
-        private String command;
-        private String variable;
+        private String command = "";
+        private String variable = "";
         private List<String> args;
         private final Parser parser;
 
@@ -926,11 +926,15 @@ public void parse(String line) {
             this.line = line;
             ParsedLine pl = parser.parse(line, 0, ParseContext.SPLIT_LINE);
             enclosedArgs(pl.words());
-            this.command = parser.getCommand(args.get(0));
-            if (!parser.validCommandName(command)) {
-                this.command = "";
+            if (!args.isEmpty()) {
+                this.command = parser.getCommand(args.get(0));
+                if (!parser.validCommandName(command)) {
+                    this.command = "";
+                }
+                this.variable = parser.getVariable(args.get(0));
+            } else {
+                this.line = "";
             }
-            this.variable = parser.getVariable(args.get(0));
         }
 
         public String line() {

demo/src/main/java/org/jline/demo/Repl.java

@@ -247,6 +247,8 @@ public static void main(String[] args) {
             parser.setEofOnUnclosedQuote(true);
             parser.setEscapeChars(null);
             parser.setRegexCommand("[:]{0,1}[a-zA-Z!]{1,}\\S*");    // change default regex to support shell commands
+            parser.blockCommentDelims(new DefaultParser.BlockCommentDelims("/*", "*/"))
+                    .lineCommentDelims(new String[]{"//", "#"});
             Terminal terminal = TerminalBuilder.builder().build();
             if (terminal.getWidth() == 0 || terminal.getHeight() == 0) {
                 terminal.setSize(new Size(120, 40));   // hard coded terminal size when redirecting

demo/src/main/scripts/init.jline

@@ -96,7 +96,6 @@ pipe |:: '.collectMany{' '}'
 pipe |?  '.findAll{' '}'
 pipe |?1 '.find{' '}'
 pipe |!  '.each{' '}'
-pipe |#  '.take(' ')'
 pipe |&  '.' ' '
 pipe grep '.collect{it.toString()}.findAll{it=~/' '/}'
 alias null '|& identity{}'