Utils: Add a FilePath::environment

A hook into the system environment of the FilePath's device.

Change-Id: I274032f9e716f3cd8b2e4af2eca010b9805a4568
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/fileutils.h

@@ -40,7 +40,10 @@
 #include <functional>
 #include <memory>
 
-namespace Utils { class FilePath; }
+namespace Utils {
+class Environment;
+class FilePath;
+} // Utils
 
 QT_BEGIN_NAMESPACE
 class QDataStream;
@@ -91,6 +94,7 @@ public:
     std::function<QDateTime(const FilePath &)> lastModified;
     std::function<QFile::Permissions(const FilePath &)> permissions;
     std::function<OsType(const FilePath &)> osType;
+    std::function<Environment(const FilePath &)> environment;
 };
 
 class QTCREATOR_UTILS_EXPORT FilePath
@@ -213,6 +217,7 @@ public:
     static void setDeviceFileHooks(const DeviceFileHooks &hooks);
 
     FilePath onDeviceSearchInPath() const;
+    Environment deviceEnvironment() const;
 
 private:
     friend class ::tst_fileutils;