Debugger: Consolidate search code for python-path

Not just to deduplicate/reuse code but also to make make it clear that
different places where lldb is called, the same preparations have to be
done.

Change-Id: I104aca845fd7b42f63443bda2502574f4d28b411
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/debugger/debuggeritem.cpp

@@ -144,8 +144,6 @@ void DebuggerItem::createId()
 
 void DebuggerItem::reinitializeFromFile(const Environment &sysEnv, QString *error)
 {
-    const bool isAndroid = m_command.path().contains("/ndk/")
-            || m_command.path().contains("/ndk-bundle/");
     // CDB only understands the single-dash -version, whereas GDB and LLDB are
     // happy with both -version and --version. So use the "working" -version
     // except for the experimental LLDB-MI which insists on --version.
@@ -167,10 +165,12 @@ void DebuggerItem::reinitializeFromFile(const Environment &sysEnv, QString *erro
         return;
     }
 
+    Environment env = sysEnv.size() == 0 ? Environment::systemEnvironment() : sysEnv;
     // Prevent calling lldb on Windows because the lldb from the llvm package is linked against
     // python but does not contain a python dll.
+    const bool isAndroidNdkLldb = DebuggerItem::addAndroidLldbPythonEnv(m_command, env);
     if (HostOsInfo::isWindowsHost() && m_command.fileName().startsWith("lldb")
-            && !isAndroid) {
+            && !isAndroidNdkLldb) {
         QString errorMessage;
         m_version = winGetDLLVersion(WinDLLFileVersion,
                                      m_command.absoluteFilePath().path(),
@@ -180,16 +180,6 @@ void DebuggerItem::reinitializeFromFile(const Environment &sysEnv, QString *erro
         return;
     }
 
-    Environment env = sysEnv.toProcessEnvironment().isEmpty() ? Environment::systemEnvironment()
-                                                              : sysEnv;
-    if (isAndroid && m_command.fileName().startsWith("lldb")) {
-        FilePath pythonPath = m_command.parentDir().parentDir().pathAppended("python3");
-        if (HostOsInfo::isAnyUnixHost())
-            pythonPath = pythonPath.pathAppended("bin");
-        if (pythonPath.exists())
-            env.prependOrSetPath(pythonPath.toUserOutput());
-    }
-
     QtcProcess proc;
     proc.setEnvironment(env);
     proc.setCommand({m_command, {version}});
@@ -275,6 +265,22 @@ void DebuggerItem::reinitializeFromFile(const Environment &sysEnv, QString *erro
     m_engineType = NoEngineType;
 }
 
+bool DebuggerItem::addAndroidLldbPythonEnv(const Utils::FilePath &lldbCmd, Utils::Environment &env)
+{
+    if (lldbCmd.baseName().contains("lldb") &&
+            (lldbCmd.path().contains("/ndk/") || lldbCmd.path().contains("/ndk-bundle/"))) {
+        const FilePath pythonDir = lldbCmd.parentDir().parentDir().pathAppended("python3");
+        const FilePath pythonBinDir =
+                HostOsInfo::isAnyUnixHost() ? pythonDir.pathAppended("bin") : pythonDir;
+        if (pythonBinDir.exists()) {
+            env.set("PYTHONHOME", pythonDir.path());
+            env.prependOrSetPath(pythonBinDir.path());
+            return true;
+        }
+    }
+    return false;
+}
+
 QString DebuggerItem::engineTypeName() const
 {
     switch (m_engineType) {

src/plugins/debugger/debuggeritem.h

@@ -107,6 +107,8 @@ public:
     QString detectionSource() const { return m_detectionSource; }
     void setDetectionSource(const QString &source) { m_detectionSource = source; }
 
+    static bool addAndroidLldbPythonEnv(const Utils::FilePath &lldbCmd, Utils::Environment &env);
+
 private:
     DebuggerItem(const QVariant &id);
     void initMacroExpander();

src/plugins/debugger/lldb/lldbengine.cpp

@@ -204,18 +204,6 @@ static QString adapterStartFailed()
     return LldbEngine::tr("Adapter start failed.");
 }
 
-static void addAndroidPythonDir(const FilePath &lldbCmd, Environment &env)
-{
-    if (!lldbCmd.path().contains("/ndk/") && !lldbCmd.path().contains("/ndk-bundle/"))
-        return;
-
-    FilePath androidPythonDir = lldbCmd.parentDir().parentDir().pathAppended("python3");
-    if (HostOsInfo::isAnyUnixHost())
-        androidPythonDir = androidPythonDir.pathAppended("bin");
-    if (androidPythonDir.exists())
-        env.prependOrSetPath(androidPythonDir.path());
-}
-
 void LldbEngine::setupEngine()
 {
     QTC_ASSERT(state() == EngineSetupRequested, qDebug() << state());
@@ -225,7 +213,7 @@ void LldbEngine::setupEngine()
     showMessage("STARTING LLDB: " + lldbCmd.toUserOutput());
     Environment environment = runParameters().debugger.environment;
     environment.appendOrSet("PYTHONUNBUFFERED", "1");  // avoid flushing problem on macOS
-    addAndroidPythonDir(lldbCmd, environment);
+    DebuggerItem::addAndroidLldbPythonEnv(lldbCmd, environment);
     m_lldbProc.setEnvironment(environment);
 
     if (runParameters().debugger.workingDirectory.isDir())