Changing how PyInstaller is called

改变调用 PyInstaller 的方式，从直接调用 PyInstaller 变为通过对应环境的 Python 解释器运行 Python 代码方式。为添加 Python 环境选择功能做准备。
参见<https://pyinstaller.org/en/stable/usage.html#running-pyinstaller-from-python-code>。

src/py2exe_gui/Core/packaging.py

@@ -12,8 +12,8 @@ from .subprocess_tool import SubProcessTool
 
 class Packaging(QtCore.QObject):
     """
-    执行打包子进程的类
-    不负责输入参数的检查 \n
+    执行打包子进程的类，负责拼接命令选项、设置子进程工作目录、启动子进程等
+    不负责输入参数的检查，输入参数检查由 PackagingTask 对象进行 \n
     """
 
     # 自定义信号
@@ -27,9 +27,9 @@ class Packaging(QtCore.QObject):
         super().__init__(parent)
 
         self.args_dict: dict = dict.fromkeys(PyinstallerArgs, "")
-        self._args: List[str] = []
+        self._args: List[str] = []  # PyInstaller 命令
         self._subprocess_working_dir: str = ""
-        self.subprocess: SubProcessTool = SubProcessTool("pyinstaller", parent=self)
+        self.subprocess: SubProcessTool = SubProcessTool("", parent=self)
 
     @QtCore.Slot(tuple)
     def set_pyinstaller_args(self, arg: tuple[PyinstallerArgs, str]) -> None:
@@ -44,9 +44,12 @@ class Packaging(QtCore.QObject):
             self._add_pyinstaller_args()
             self._set_subprocess_working_dir()
 
+    def set_pyinstaller(self, python_path):
+        self.subprocess.set_program(python_path)
+
     def _add_pyinstaller_args(self) -> None:
         """
-        将命令参数字典中的参数按顺序添加到命令参数列表中 \n
+        将命令参数字典中的参数按顺序添加到PyInstaller命令参数列表中 \n
         """
 
         self._args = []  # 避免重复添加
@@ -78,6 +81,15 @@ class Packaging(QtCore.QObject):
         使用给定的参数启动打包子进程 \n
         """
 
+        # 从 Python 内启动 Pyinstaller，
+        # 参见 https://pyinstaller.org/en/stable/usage.html#running-pyinstaller-from-python-code
+        cmd = [
+            "-c",
+            f"import PyInstaller.__main__;PyInstaller.__main__.run({self._args})",
+        ]
+
         self.subprocess.set_working_dir(self._subprocess_working_dir)
-        self.subprocess.set_arguments(self._args)
-        self.subprocess.start_process(time_out=500)
+        self.subprocess.set_arguments(cmd)
+        self.subprocess.start_process(
+            time_out=500, mode=QtCore.QIODeviceBase.OpenModeFlag.ReadOnly
+        )

src/py2exe_gui/Core/subprocess_tool.py

@@ -93,6 +93,14 @@ class SubProcessTool(QObject):
         else:
             return True
 
+    def set_program(self, program: str) -> None:
+        """
+        设置子进程程序 \n
+        :param program: 程序名称
+        """
+
+        self.program = program
+
     def set_arguments(self, arguments: Sequence[str]) -> None:
         """
         设置子进程参数 \n