Utils: Use a structure to specify several QtcProcess device hooks

... and add a QtcProcess::systemEnvironmentForBinary(filePath)
redirecting to IDevice::systemEnvironment() of the device implicitly
given by filePath. A device implied by e.g. a qmake binary or a compiler
binary is a common scenario.

Change-Id: Ieb2c724ae66f1a1752132e4e4648a604390ca369
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/libs/utils/qtcprocess.cpp

@@ -73,7 +73,7 @@ enum { defaultMaxHangTimerCount = 10 };
 
 static Q_LOGGING_CATEGORY(processLog, "qtc.utils.synchronousprocess", QtWarningMsg);
 
-static std::function<void(QtcProcess &)> s_remoteRunProcessHook;
+static DeviceProcessHooks s_deviceHooks;
 
 // Data for one channel buffer (stderr/stdout)
 class ChannelBuffer
@@ -225,8 +225,8 @@ void QtcProcess::start()
     QTC_CHECK(d->m_writeData.isEmpty()); // FIXME: Use it.
 
     if (d->m_commandLine.executable().needsDevice()) {
-        QTC_ASSERT(s_remoteRunProcessHook, return);
-        s_remoteRunProcessHook(*this);
+        QTC_ASSERT(s_deviceHooks.startProcessHook, return);
+        s_deviceHooks.startProcessHook(*this);
         return;
     }
 
@@ -336,9 +336,9 @@ void QtcProcess::setDisableUnixTerminal()
     d->m_disableUnixTerminal = true;
 }
 
-void QtcProcess::setRemoteStartProcessHook(const std::function<void(QtcProcess &)> &hook)
+void QtcProcess::setRemoteProcessHooks(const DeviceProcessHooks &hooks)
 {
-    s_remoteRunProcessHook = hook;
+    s_deviceHooks = hooks;
 }
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
@@ -561,6 +561,16 @@ QString QtcProcess::locateBinary(const QString &path, const QString &binary)
     return QString();
 }
 
+Environment QtcProcess::systemEnvironmentForBinary(const FilePath &filePath)
+{
+    if (filePath.needsDevice()) {
+        QTC_ASSERT(s_deviceHooks.systemEnvironmentForBinary, return {});
+        return s_deviceHooks.systemEnvironmentForBinary(filePath);
+    }
+
+    return Environment::systemEnvironment();
+}
+
 QString QtcProcess::locateBinary(const QString &binary)
 {
     const QByteArray path = qgetenv("PATH");

src/libs/utils/qtcprocess.h

@@ -41,9 +41,17 @@ namespace Utils {
 
 class CommandLine;
 class Environment;
+class QtcProcess;
 
 namespace Internal { class QtcProcessPrivate; }
 
+class DeviceProcessHooks
+{
+public:
+    std::function<void(QtcProcess &)> startProcessHook;
+    std::function<Environment(const FilePath &)> systemEnvironmentForBinary;
+};
+
 class QTCREATOR_UTILS_EXPORT QtcProcess : public QProcess
 {
     Q_OBJECT
@@ -92,7 +100,7 @@ public:
     void setStdOutCallback(const std::function<void(const QString &)> &callback);
     void setStdErrCallback(const std::function<void(const QString &)> &callback);
 
-    static void setRemoteStartProcessHook(const std::function<void (QtcProcess &)> &hook);
+    static void setRemoteProcessHooks(const DeviceProcessHooks &hooks);
 
     void setOpenMode(OpenMode mode);
 
@@ -123,6 +131,8 @@ public:
     static QString locateBinary(const QString &binary);
     static QString locateBinary(const QString &path, const QString &binary);
 
+    static Environment systemEnvironmentForBinary(const FilePath &filePath);
+
 private:
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     void setupChildProcess() override;

src/plugins/projectexplorer/devicesupport/devicemanager.cpp

@@ -363,59 +363,69 @@ DeviceManager::DeviceManager(bool isInstance) : d(std::make_unique<DeviceManager
     connect(Core::ICore::instance(), &Core::ICore::saveSettingsRequested,
             this, &DeviceManager::save);
 
-    DeviceFileHooks hooks;
+    DeviceFileHooks deviceHooks;
 
-    hooks.isExecutableFile = [](const FilePath &filePath) {
+    deviceHooks.isExecutableFile = [](const FilePath &filePath) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return false);
         return device->isExecutableFile(filePath);
     };
 
-    hooks.isReadableFile = [](const FilePath &filePath) {
+    deviceHooks.isReadableFile = [](const FilePath &filePath) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return false);
         return device->isReadableFile(filePath);
     };
 
-    hooks.isReadableDir = [](const FilePath &filePath) {
+    deviceHooks.isReadableDir = [](const FilePath &filePath) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return false);
         return device->isReadableDirectory(filePath);
     };
 
-    hooks.isWritableDir = [](const FilePath &filePath) {
+    deviceHooks.isWritableDir = [](const FilePath &filePath) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return false);
         return device->isWritableDirectory(filePath);
     };
 
-    hooks.createDir = [](const FilePath &filePath) {
+    deviceHooks.createDir = [](const FilePath &filePath) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return false);
         return device->createDirectory(filePath);
     };
 
-    hooks.dirEntries = [](const FilePath &filePath,
+    deviceHooks.dirEntries = [](const FilePath &filePath,
             const QStringList &nameFilters, QDir::Filters filters) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return FilePaths());
         return device->directoryEntries(filePath, nameFilters, filters);
     };
 
-    hooks.fileContents = [](const FilePath &filePath, int maxSize) {
+    deviceHooks.fileContents = [](const FilePath &filePath, int maxSize) {
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return QByteArray());
         return device->fileContents(filePath, maxSize);
     };
 
-    FilePath::setDeviceFileHooks(hooks);
+    FilePath::setDeviceFileHooks(deviceHooks);
 
-    QtcProcess::setRemoteStartProcessHook([](QtcProcess &process) {
+    DeviceProcessHooks processHooks;
+
+    processHooks.startProcessHook = [](QtcProcess &process) {
         FilePath filePath = process.commandLine().executable();
         auto device = DeviceManager::deviceForPath(filePath);
         QTC_ASSERT(device, return);
         device->runProcess(process);
-    });
+    };
+
+    processHooks.systemEnvironmentForBinary = [](const FilePath &filePath) {
+        auto device = DeviceManager::deviceForPath(filePath);
+        QTC_ASSERT(device, return Environment());
+        return device->systemEnvironment();
+    };
+
+    QtcProcess::setRemoteProcessHooks(processHooks);
 }
 
 DeviceManager::~DeviceManager()