Sandbox: allow to control the scope of action

libssu/sandbox.cpp

@@ -7,6 +7,8 @@
 
 #include "sandbox_p.h"
 
+#include <stdlib.h>
+
 #include <QtCore/QAbstractFileEngineHandler>
 #include <QtCore/QDir>
 #include <QtCore/QFSFileEngine>
@@ -39,6 +41,10 @@ class Sandbox::FileEngineHandler : public QAbstractFileEngineHandler {
  * copy of @a sandboxPath to work on and files in the original directory will
  * stay untouched.
  *
+ * The argument @scopes allows to control if the sandbox will be used by this
+ * process, its children processes (@c SSU_TESTS_SANDBOX environment variable
+ * will be exported), or both.
+ *
  * Internally it is based on QAbstractFileEngineHandler.
  */
 
@@ -81,7 +87,7 @@ Sandbox::Sandbox(){
   m_handler = new FileEngineHandler(m_sandboxPath);
 }
 
-Sandbox::Sandbox(const QString &sandboxPath, Usage usage){
+Sandbox::Sandbox(const QString &sandboxPath, Usage usage, Scopes scopes){
   if (s_instance != 0){
     qFatal("%s: Cannot be instantiated more than once", Q_FUNC_INFO);
   }
@@ -128,7 +134,13 @@ Sandbox::Sandbox(const QString &sandboxPath, Usage usage){
     m_sandboxPath = sandboxCopyPath;
   }
 
-  m_handler = new FileEngineHandler(m_sandboxPath);
+  if (scopes & ThisProcess){
+    m_handler = new FileEngineHandler(m_sandboxPath);
+  }
+
+  if (scopes & ChildProcesses){
+    setenv("SSU_TESTS_SANDBOX", qPrintable(m_sandboxPath), 1);
+  }
 }
 
 Sandbox::~Sandbox(){

libssu/sandbox_p.h

@@ -20,9 +20,15 @@ class Sandbox {
       UseAsSkeleton,
     };
 
+    enum Scope {
+      ThisProcess    = 0x01,
+      ChildProcesses = 0x02,
+    };
+    Q_DECLARE_FLAGS(Scopes, Scope)
+
   public:
     Sandbox();
-    Sandbox(const QString &sandboxPath, Usage usage);
+    Sandbox(const QString &sandboxPath, Usage usage, Scopes scopes);
     ~Sandbox();
 
   private:
@@ -34,4 +40,6 @@ class Sandbox {
     FileEngineHandler *m_handler;
 };
 
+Q_DECLARE_OPERATORS_FOR_FLAGS(Sandbox::Scopes)
+
 #endif