Method findBinaryInPath

src/util.cpp:120–179

* @brief Finds the absolute path of a binary by searching the PATH environment * variable. * * Iterates through each PATH entry, checks whether the binary exists and is * executable, and returns the first matching absolute file path. On Windows, if * no local match is found, it may fall back to a WSL invocation when the binary * name is valid and WSL appears to support it. * * @example *

 * found.
 */
auto Util::findBinaryInPath(const QString &binary) -> QString {
  if (binary.isEmpty())
    return QString();

  initialiseEnvironment();

  QString ret;

  const QString binaryWithSep = QDir::separator() + binary;

  if (_env.contains("PATH")) {
    QString path = _env.value("PATH");
    const QChar delimiter = QDir::separator() == '\\' ? ';' : ':';
    QStringList entries = path.split(delimiter);

    for (const QString &entryConst : entries) {
      QString fullPath = entryConst + binaryWithSep;
      QFileInfo qfi(fullPath);
#ifdef Q_OS_WIN
      if (!qfi.exists()) {
        QString fullPathExe = fullPath + ".exe";
        qfi = QFileInfo(fullPathExe);
      }
#endif
      if (!qfi.exists()) {
        continue;
      }
      if (!qfi.isExecutable()) {
        continue;
      }

      ret = qfi.absoluteFilePath();
      break;
    }
  }
#ifdef Q_OS_WIN
  if (ret.isEmpty()) {
    static const QRegularExpression whitespaceRegex(QStringLiteral("\\s"));
    const bool hasWhitespace = binary.contains(whitespaceRegex);
    if (!binary.isEmpty() && !hasWhitespace) {
      QString wslCommand = QStringLiteral("wsl ") + binary;
#ifdef QT_DEBUG
      dbg() << "Util::findBinaryInPath(): falling back to WSL for binary"
            << binary;
#endif
      QString out, err;
      if (Executor::executeBlocking(wslCommand, {"--version"}, &out, &err) ==
              0 &&
          !out.isEmpty() && err.isEmpty()) {
#ifdef QT_DEBUG
        dbg() << "Util::findBinaryInPath(): using WSL binary" << wslCommand;
#endif
        ret = wslCommand;
      }
    }
  }
#endif