splitCommand static method

@visibleForTesting List<String> splitCommand(String command)

Splits a shell command string into tokens.

Handles single-quoted ('…') and double-quoted ("…") groups so that arguments containing spaces can be expressed as a single string: 'nginx -c "/etc/nginx/nginx.conf"' → ['nginx', '-c', '/etc/nginx/nginx.conf'].

Exposed for testing only. Prefer withCommand with a List<String> for production use.

Implementation

@visibleForTesting
static List<String> splitCommand(String command) {
  final result = <String>[];
  final current = StringBuffer();
  var inSingleQuote = false;
  var inDoubleQuote = false;
  for (var i = 0; i < command.length; i++) {
    final char = command[i];
    if (inSingleQuote) {
      if (char == "'") {
        inSingleQuote = false;
      } else {
        current.write(char);
      }
    } else if (inDoubleQuote) {
      if (char == '"') {
        inDoubleQuote = false;
      } else {
        current.write(char);
      }
    } else if (char == "'") {
      inSingleQuote = true;
    } else if (char == '"') {
      inDoubleQuote = true;
    } else if (char == ' ' || char == '\t') {
      if (current.isNotEmpty) {
        result.add(current.toString());
        current.clear();
      }
    } else {
      current.write(char);
    }
  }
  if (current.isNotEmpty) {
    result.add(current.toString());
  }
  return result;
}