Improve error message for installing multiple files to the same path

This is frequently a result of omitting a qbs.installSourceBase binding.

Change-Id: Ibd723f759967abac80914267ec8876a72997ea31
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/lib/corelib/buildgraph/productinstaller.cpp b/src/lib/corelib/buildgraph/productinstaller.cpp
index 5ecb0d3de..d7d2eda2b 100644
--- a/src/lib/corelib/buildgraph/productinstaller.cpp
+++ b/src/lib/corelib/buildgraph/productinstaller.cpp
@@ -202,7 +202,9 @@ void ProductInstaller::copyFile(const Artifact *artifact)
     }
 
     if (m_targetFilePathsMap.contains(targetFilePath)) {
-        handleError(Tr::tr("Cannot install files '%1' and '%2' to the same location '%3'.")
+        handleError(Tr::tr("Cannot install files '%1' and '%2' to the same location '%3'. If you "
+                           "are attempting to install a directory hierarchy, consider using "
+                           "the qbs.installSourceBase property.")
                     .arg(artifact->filePath(), m_targetFilePathsMap[targetFilePath],
                          targetFilePath));
     }