Fix updater interface: pass desktop_arch_path in args

This also adds a lot of type hints. I refrained from changing a lot
of 'str' variables to Path variables, but eventually I think they
will need to become Paths

aqt/updater.py

@@ -20,9 +20,9 @@
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 import logging
 import os
-import pathlib
 import subprocess
 from logging import getLogger
+from pathlib import Path
 from typing import Optional
 
 import patch
@@ -41,13 +41,13 @@ def unpatched_path(os_name: str, final_component: str) -> str:
 
 
 class Updater:
-    def __init__(self, prefix: pathlib.Path, logger):
+    def __init__(self, prefix: Path, logger):
         self.logger = logger
         self.prefix = prefix
         self.qmake_path = None
         self.qconfigs = {}
 
-    def _patch_binfile(self, file: pathlib.Path, key: bytes, newpath: bytes):
+    def _patch_binfile(self, file: Path, key: bytes, newpath: bytes):
         """Patch binary file with key/value"""
         st = file.stat()
         data = file.read_bytes()
@@ -62,7 +62,7 @@ class Updater:
         file.write_bytes(data)
         os.chmod(str(file), st.st_mode)
 
-    def _append_string(self, file: pathlib.Path, val: str):
+    def _append_string(self, file: Path, val: str):
         """Append string to file"""
         st = file.stat()
         data = file.read_text("UTF-8")
@@ -70,7 +70,7 @@ class Updater:
         file.write_text(data, "UTF-8")
         os.chmod(str(file), st.st_mode)
 
-    def _patch_textfile(self, file: pathlib.Path, old: str, new: str):
+    def _patch_textfile(self, file: Path, old: str, new: str):
         st = file.stat()
         data = file.read_text("UTF-8")
         data = data.replace(old, new)
@@ -167,10 +167,9 @@ class Updater:
                 newpath=bytes(str(self.prefix), "UTF-8"),
             )
 
-    def patch_qmake_script(self, base_dir, qt_version: str, os_name):
+    def patch_qmake_script(self, base_dir, qt_version: str, os_name: str, desktop_arch_dir: str):
-        arch_dir = default_desktop_arch_dir(os_name, qt_version)
         sep = "\\" if os_name == "windows" else "/"
-        patched = sep.join([base_dir, qt_version, arch_dir, "bin"])
+        patched = sep.join([base_dir, qt_version, desktop_arch_dir, "bin"])
         unpatched = unpatched_path(os_name, "bin")
         qmake_path = self.prefix / "bin" / ("qmake.bat" if os_name == "windows" else "qmake")
         self.logger.info(f"Patching {qmake_path}")
@@ -211,7 +210,7 @@ class Updater:
             f.write("cd /D {}\n".format(os.path.join(base_dir, qt_version, arch_dir)))
             f.write("echo Remember to call vcvarsall.bat to complete environment setup!\n")
 
-    def set_license(self, base_dir, qt_version, arch_dir):
+    def set_license(self, base_dir: str, qt_version: str, arch_dir: str):
         """Update qtconfig.pri as OpenSource"""
         with open(os.path.join(base_dir, qt_version, arch_dir, "mkspecs", "qconfig.pri"), "r+") as f:
             lines = f.readlines()
@@ -224,21 +223,27 @@ class Updater:
                     line = "QT_LICHECK =\n"
                 f.write(line)
 
-    def patch_target_qt_conf(self, base_dir, qt_version, arch_dir, os_name):
+    def patch_target_qt_conf(self, base_dir: str, qt_version: str, arch_dir: str, os_name: str, desktop_arch_dir: str):
         target_qt_conf = self.prefix / "bin" / "target_qt.conf"
         old_targetprefix = f'Prefix={unpatched_path(os_name, "target")}'
-        new_hostprefix = f"HostPrefix=../../{default_desktop_arch_dir(os_name, qt_version)}"
+        new_hostprefix = f"HostPrefix=../../{desktop_arch_dir}"
-        new_targetprefix = "Prefix={}".format(str(pathlib.Path(base_dir).joinpath(qt_version, arch_dir, "target")))
+        new_targetprefix = "Prefix={}".format(str(Path(base_dir).joinpath(qt_version, arch_dir, "target")))
         new_hostdata = "HostData=../{}".format(arch_dir)
         self._patch_textfile(target_qt_conf, old_targetprefix, new_targetprefix)
         self._patch_textfile(target_qt_conf, "HostPrefix=../../", new_hostprefix)
         self._patch_textfile(target_qt_conf, "HostData=target", new_hostdata)
 
     @classmethod
-    def update(cls, target: TargetConfig, base_dir: str):
+    def update(cls, target: TargetConfig, base_path: Path, installed_desktop_arch_dir: Optional[str]):
         """
         Make Qt configuration files, qt.conf and qtconfig.pri.
         And update pkgconfig and patch Qt5Core and qmake
+
+        :param installed_desktop_arch_dir:  This is the path to a desktop Qt  installation, like `Qt/6.3.0/mingw_win64`.
+                                            This may or may not contain an actual desktop Qt installation.
+                                            If it does not, the Updater will patch files in a mobile Qt installation
+                                            that point to this directory, and this installation will be non-functional
+                                            until the user installs a desktop Qt in this directory.
         """
         logger = getLogger("aqt.updater")
         arch = target.arch
@@ -246,8 +251,9 @@ class Updater:
         os_name = target.os_name
         version_dir = dir_for_version(version)
         arch_dir = QtRepoProperty.get_arch_dir_name(os_name, arch, version)
+        base_dir = str(base_path)
         try:
-            prefix = pathlib.Path(base_dir) / version_dir / arch_dir
+            prefix = base_path / version_dir / arch_dir
             updater = Updater(prefix, logger)
             updater.set_license(base_dir, version_dir, arch_dir)
             if target.arch not in [
@@ -274,8 +280,14 @@ class Updater:
             elif version in SimpleSpec(">=5.0,<6.0"):
                 updater.patch_qmake()
             else:  # qt6 non-desktop
-                updater.patch_qmake_script(base_dir, version_dir, target.os_name)
+                desktop_arch_dir = (
-                updater.patch_target_qt_conf(base_dir, version_dir, arch_dir, target.os_name)
+                    installed_desktop_arch_dir
+                    if installed_desktop_arch_dir is not None
+                    else default_desktop_arch_dir(os_name, version)
+                )
+
+                updater.patch_qmake_script(base_dir, version_dir, target.os_name, desktop_arch_dir)
+                updater.patch_target_qt_conf(base_dir, version_dir, arch_dir, target.os_name, desktop_arch_dir)
         except IOError as e:
             raise UpdaterError(f"Updater caused an IO error: {e}") from e
 

tests/test_updater.py

@@ -1,4 +1,5 @@
 import re
+from pathlib import Path
 from tempfile import TemporaryDirectory
 
 import pytest
@@ -58,7 +59,7 @@ def test_updater_update_license_io_error(monkeypatch, target_config: TargetConfi
     with pytest.raises(UpdaterError) as err:
         with TemporaryDirectory() as empty_dir:
             # Try to update a Qt installation that does not exist
-            Updater.update(target_config, base_dir=empty_dir)
+            Updater.update(target_config, base_path=Path(empty_dir), installed_desktop_arch_dir=None)
     assert err.type == UpdaterError
     err_msg = format(err.value)
     assert expected_err_pattern.match(err_msg)