Allow overriding default QContactManagerEngine via env var

This patch adds support for overriding the default
QContactManagerEngine via the QTCONTACTS_MANAGER_OVERRIDE environment
variable.

Change-Id: Ia4807269fd43f6f7e4c2f13b943da5ee6f9cb38c
Reviewed-by: Matthew Vogt <matthew.vogt@qinetic.com.au>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/contacts/qcontactmanager.cpp b/src/contacts/qcontactmanager.cpp
index a704333c45..9fd812c415 100644
--- a/src/contacts/qcontactmanager.cpp
+++ b/src/contacts/qcontactmanager.cpp
@@ -132,6 +132,10 @@ QTM_BEGIN_NAMESPACE
     Returns a list of available manager ids that can be used when constructing
     a QContactManager.  If an empty id is specified to the constructor, the
     first value in this list will be used instead.
+
+    The QTCONTACTS_MANAGER_OVERRIDE environment variable may be set to
+    override the default engine.
+
     \since 1.0
   */
 QStringList QContactManager::availableManagers()
@@ -151,6 +155,13 @@ QStringList QContactManager::availableManagers()
     }
 #endif
 
+    // and prefer the override engine if specified in the environment
+    QString overrideManagerName = qgetenv("QTCONTACTS_MANAGER_OVERRIDE");
+    if (!overrideManagerName.isEmpty() && ret.contains(overrideManagerName)) {
+        ret.removeAll(overrideManagerName);
+        ret.prepend(overrideManagerName);
+    }
+
     return ret;
 }