[gh-11363] Parse jvm.config lines into individual arguments

Lines can contain multiple space-separated arguments like:
  -Xmx2048m -Xms1024m -Dtest.prop1=value1

Parse each line into individual arguments, respecting quoted strings.
Then quote each argument individually for batch script safety.

Author: gnodet

apache-maven/src/assembly/maven/bin/JvmConfigParser.java

@@ -22,6 +22,8 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.stream.Stream;
 
 /**
@@ -69,22 +71,16 @@ public static void main(String[] args) {
                 line = line.replace("${MAVEN_PROJECTBASEDIR}", mavenProjectBasedir);
                 line = line.replace("$MAVEN_PROJECTBASEDIR", mavenProjectBasedir);
 
-                // Strip outer single quotes if present (they're just for grouping in jvm.config)
-                // But preserve already-doubled quotes (escaped quotes like ""value"")
-                if (line.startsWith("\"") && line.endsWith("\"") && line.length() > 1) {
-                    // Check if it's NOT already escaped (doubled quotes at start/end)
-                    if (!(line.length() >= 4 && line.startsWith("\"\"") && line.endsWith("\"\""))) {
-                        line = line.substring(1, line.length() - 1);
-                    }
-                } else if (line.startsWith("'") && line.endsWith("'") && line.length() > 1) {
-                    line = line.substring(1, line.length() - 1);
-                }
+                // Parse line into individual arguments (split on spaces, respecting quotes)
+                List<String> args = parseArguments(line);
 
-                // Append quoted argument with space separator
-                if (result.length() > 0) {
-                    result.append(' ');
+                // Append each argument quoted
+                for (String arg : args) {
+                    if (result.length() > 0) {
+                        result.append(' ');
+                    }
+                    result.append('"').append(arg).append('"');
                 }
-                result.append('"').append(line).append('"');
             });
 
             System.out.print(result.toString());
@@ -93,5 +89,43 @@ public static void main(String[] args) {
             System.exit(1);
         }
     }
+
+    /**
+     * Parse a line into individual arguments, respecting quoted strings.
+     * Quotes are stripped from the arguments.
+     */
+    private static List<String> parseArguments(String line) {
+        List<String> args = new ArrayList<>();
+        StringBuilder current = new StringBuilder();
+        boolean inQuotes = false;
+        boolean inSingleQuotes = false;
+
+        for (int i = 0; i < line.length(); i++) {
+            char c = line.charAt(i);
+
+            if (c == '"' && !inSingleQuotes) {
+                inQuotes = !inQuotes;
+                // Don't include the quote character itself
+            } else if (c == '\'' && !inQuotes) {
+                inSingleQuotes = !inSingleQuotes;
+                // Don't include the quote character itself
+            } else if (c == ' ' && !inQuotes && !inSingleQuotes) {
+                // Space outside quotes - end of argument
+                if (current.length() > 0) {
+                    args.add(current.toString());
+                    current.setLength(0);
+                }
+            } else {
+                current.append(c);
+            }
+        }
+
+        // Add last argument
+        if (current.length() > 0) {
+            args.add(current.toString());
+        }
+
+        return args;
+    }
 }