Adjust Qt/PyQt version ranges

README.asciidoc

@@ -72,20 +72,17 @@ https://www.the-compiler.org/pubkey.asc[0x916eb0c8fd55a072].
 Requirements
 ------------
 
-// FIXME:qt6 update this
-
 The following software and libraries are required to run qutebrowser:
 
 * https://www.python.org/[Python] 3.7 or newer
-* https://www.qt.io/[Qt] 5.15.0 or newer (5.15 LTS recommended, Qt 6 is
-  not supported yet) with the following modules:
+* https://www.qt.io/[Qt], either 6.2.0 or newer, or 5.15.0 or newer, with the following modules:
   - QtCore / qtbase
   - QtQuick (part of qtbase or qtdeclarative in some distributions)
   - QtSQL (part of qtbase in some distributions)
   - QtDBus (part of qtbase in some distributions; note that a connection to DBus at
     runtime is optional)
   - QtOpenGL
-  - QtWebEngine (5.15.2 or newer), or
+  - QtWebEngine (if using Qt 5, 5.15.2 or newer), or
   - alternatively QtWebKit (5.212) - **This is not recommended** due to known security
     issues in QtWebKit, you most likely want to use qutebrowser with the
     default QtWebEngine backend (based on Chromium) instead. Quoting the
@@ -93,8 +90,8 @@ The following software and libraries are required to run qutebrowser:
     _[The latest QtWebKit] release is based on [an] old WebKit revision with known
 unpatched vulnerabilities. Please use it carefully and avoid visiting untrusted
 websites and using it for transmission of sensitive data._
-* https://www.riverbankcomputing.com/software/pyqt/intro[PyQt] 5.15.0 or newer
-  for Python 3
+* https://www.riverbankcomputing.com/software/pyqt/intro[PyQt] 6.2.2 or newer
+  (Qt 6) or 5.15.0 or newer (Qt 5)
 * https://palletsprojects.com/p/jinja/[jinja2]
 * https://github.com/yaml/pyyaml[PyYAML]
 

qutebrowser/misc/earlyinit.py

@@ -189,12 +189,17 @@ def check_qt_version():
         # QVersionNumber was added in Qt 5.6, QLibraryInfo.version() in 5.8
         recent_qt_runtime = False
 
-    if QT_VERSION < 0x050F00 or PYQT_VERSION < 0x050500 or not recent_qt_runtime:
+    if QT_VERSION < 0x050F00 or PYQT_VERSION < 0x050F00 or not recent_qt_runtime:
         text = ("Fatal error: Qt >= 5.15.0 and PyQt >= 5.15.0 are required, "
                 "but Qt {} / PyQt {} is installed.".format(qt_version(),
                                                            PYQT_VERSION_STR))
         _die(text)
 
+    if 0x060000 <= PYQT_VERSION < 0x060202:
+        text = ("Fatal error: With Qt 6, PyQt >= 6.2.2 is required, but "
+                "{} is installed.".format(PYQT_VERSION_STR))
+        _die(text)
+
 
 def check_ssl_support():
     """Check if SSL support is available."""