Re-run process commands if a relevant environment variable has changed

Process commands can now declare that they are sensitive to certain
environment variables. If such a variable changes its value, we
invalidate the respective transformer.

[ChangeLog] Added new property "relevantEnvironmentVariables" to the
Command class

Change-Id: Id866dc676b3b483a5d843e6125c91829f5094eba
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/lib/corelib/buildgraph/buildgraphloader.h b/src/lib/corelib/buildgraph/buildgraphloader.h
index b27836ab4..bda8f3aae 100644
--- a/src/lib/corelib/buildgraph/buildgraphloader.h
+++ b/src/lib/corelib/buildgraph/buildgraphloader.h
@@ -103,12 +103,13 @@ private:
                                            const ResolvedProductPtr &newlyResolvedProduct);
     bool checkForPropertyChanges(const ResolvedProductPtr &restoredProduct,
                                  const ResolvedProductPtr &newlyResolvedProduct);
-    bool checkTransformersForPropertyChanges(const ResolvedProductPtr &restoredProduct,
+    bool checkTransformersForChanges(const ResolvedProductPtr &restoredProduct,
                                              const ResolvedProductPtr &newlyResolvedProduct);
     void onProductRemoved(const ResolvedProductPtr &product, ProjectBuildData *projectBuildData,
                           bool removeArtifactsFromDisk = true);
     bool checkForPropertyChanges(const TransformerPtr &restoredTrafo,
             const ResolvedProductPtr &freshProduct);
+    bool checkForEnvChanges(const TransformerPtr &restoredTrafo);
     bool checkForPropertyChange(const Property &restoredProperty,
                                 const QVariantMap &newProperties);
     void replaceFileDependencyWithArtifact(const ResolvedProductPtr &fileDepProduct,
@@ -140,6 +141,8 @@ private:
 
     // These must only be deleted at the end so we can still peek into the old look-up table.
     QList<FileResourceBase *> m_objectsToDelete;
+
+    bool m_envChange = false;
 };
 
 } // namespace Internal