ClangTools: Allow invoking clazy-standalone instead of clang

...this is for testing and debugging purposes so far.

Eventually, we want to switch to clazy-standalone. But as of now there
is no released clazy version supporting the required "-export-fixes="
option. It's in clazy's master branch only.

Change-Id: If09941dc387658bbc17646a9140f4ee8fad4d6b3
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/clangtools/clangtidyclazyruncontrol.cpp

@@ -50,8 +50,12 @@ QList<RunnerCreator> ClangTidyClazyRunWorker::runnerCreators()
     if (m_diagnosticConfig.clangTidyMode() != CppTools::ClangDiagnosticConfig::TidyMode::Disabled)
         creators << [this]() { return createRunner<ClangTidyRunner>(); };
 
-    if (!m_diagnosticConfig.clazyChecks().isEmpty())
+    if (!m_diagnosticConfig.clazyChecks().isEmpty()) {
+        if (!qEnvironmentVariable("QTC_USE_CLAZY_STANDALONE_PATH").isEmpty())
+            creators << [this]() { return createRunner<ClazyStandaloneRunner>(); };
+        else
             creators << [this]() { return createRunner<ClazyPluginRunner>(); };
+    }
 
     return creators;
 }

src/plugins/clangtools/clangtidyclazyrunner.cpp

@@ -86,6 +86,14 @@ static QStringList tidyChecksArguments(const ClangDiagnosticConfig diagnosticCon
     return {};
 }
 
+static QStringList clazyChecksArguments(const ClangDiagnosticConfig diagnosticConfig)
+{
+    const QString clazyChecks = diagnosticConfig.clazyChecks();
+    if (!clazyChecks.isEmpty())
+        return {"-checks=" + diagnosticConfig.clazyChecks()};
+    return {};
+}
+
 static QStringList mainToolArguments(const QString &mainFilePath, const QString &outputFilePath)
 {
     return {
@@ -123,6 +131,21 @@ ClangTidyRunner::ClangTidyRunner(const ClangDiagnosticConfig &config, QObject *p
     });
 }
 
+ClazyStandaloneRunner::ClazyStandaloneRunner(const ClangDiagnosticConfig &config, QObject *parent)
+    : ClangToolRunner(parent)
+{
+    setName(tr("Clazy"));
+    setOutputFileFormat(OutputFileFormat::Yaml);
+    setExecutable(qEnvironmentVariable("QTC_USE_CLAZY_STANDALONE_PATH"));
+    setArgsCreator([this, config](const QStringList &baseOptions) {
+        return QStringList()
+            << clazyChecksArguments(config)
+            << mainToolArguments(filePath(), m_logFile)
+            << "--"
+            << clangArguments(config, baseOptions);
+    });
+}
+
 ClazyPluginRunner::ClazyPluginRunner(const ClangDiagnosticConfig &config, QObject *parent)
     : ClangToolRunner(parent)
 {

src/plugins/clangtools/clangtidyclazyrunner.h

@@ -40,6 +40,14 @@ public:
     ClangTidyRunner(const CppTools::ClangDiagnosticConfig &config, QObject *parent = nullptr);
 };
 
+class ClazyStandaloneRunner final : public ClangToolRunner
+{
+    Q_OBJECT
+
+public:
+    ClazyStandaloneRunner(const CppTools::ClangDiagnosticConfig &config, QObject *parent = nullptr);
+};
+
 class ClazyPluginRunner final : public ClangToolRunner
 {
     Q_OBJECT