feat: open more perf files

Currently `hotspot dir` only opens perf.data files. This patch extends
this to perf.data, perf.data.old and perf.data.perfparser files.

src/main.cpp

@@ -57,6 +57,20 @@ void Q_DECL_UNUSED initRCCIconTheme()
 }
 #endif
 
+namespace {
+QStringList findPerfDataFiles(const QDir& directory = QDir::current())
+{
+ QStringList files;
+
+ for (const auto& filename : {QStringLiteral("perf.data"), QStringLiteral("perf.data.perfparser")}) {
+ if (directory.exists(filename)) {
+ files.push_back(directory.absoluteFilePath(filename));
+ }
+ }
+ return files;
+}
+}
+
 std::unique_ptr<QCoreApplication> createApplication(int& argc, char* argv[])
 {
  const std::initializer_list<std::string_view> nonGUIOptions = {"--version", "-v", "--exportTo",
@@ -236,7 +250,12 @@ int main(int argc, char** argv)
  if (!files.isEmpty()) {
  auto file = files.constFirst();
  if (QFileInfo(file).isDir()) {
- file.append(QLatin1String("/perf.data"));
+ // search for common perf data files in dir and open the first one found
+ // if none is found, hotspot will complain, that `file` is not a file
+ const auto perfDataFiles = findPerfDataFiles(QDir(file));
+ if (!perfDataFiles.isEmpty()) {
+ file = perfDataFiles.first();
+ }
  }
 
  if (parser.isSet(exportTo)) {
@@ -267,9 +286,12 @@ int main(int argc, char** argv)
  } else {
  // open perf.data in current CWD, if it exists
  // this brings hotspot closer to the behavior of "perf report"
- const auto perfDataFile = QStringLiteral("perf.data");
- if (QFile::exists(perfDataFile) && window) {
- window->openFile(perfDataFile);
+ const auto perfDataFiles = findPerfDataFiles();
+ for (const auto& perfDataFile : perfDataFiles) {
+ if (window) {
+ window->openFile(perfDataFile);
+ break;
+ }
  }
  }
  if (window)