QmlPreview: Fix socket connection on macOS

With Design Studio branding the temporary path got just too long (107
chars). Make the file name shorter, and add a warning for future
reference.

Change-Id: Id5ff448d55a8b109234b7c113695ea54b1836a2f
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/libs/utils/url.cpp b/src/libs/utils/url.cpp
index 026af262fc..e325615bb2 100644
--- a/src/libs/utils/url.cpp
+++ b/src/libs/utils/url.cpp
@@ -47,7 +47,13 @@ QUrl urlFromLocalSocket()
 {
     QUrl serverUrl;
     serverUrl.setScheme(urlSocketScheme());
-    TemporaryFile file("qtcreator-freesocket");
+    TemporaryFile file("qtc-socket");
+    // see "man unix" for unix socket file name size limitations
+    if (file.fileName().size() > 104) {
+        qWarning().nospace()
+            << "Socket file name \"" << file.fileName()
+            << "\" is larger than 104 characters, which will not work on Darwin/macOS/Linux!";
+    }
     if (file.open())
         serverUrl.setPath(file.fileName());
     return serverUrl;