Install works on Windows

docs/INSTALL.md

@@ -2,12 +2,21 @@
 
 *jersi_certu* has been developed using Python 3.8.5. So it is better to have installed such version or some higher version. 
 
-### Instructions for Windows and Linux platforms
+### Instructions for Linux and Windows platforms
 
 1. Make an installation directory by either cloning this *git* repository or downloading it as a zip archive and unzipping it.
+
 2. Move into the installation directory, where the `README.md` file seats.
-3. Execute `jersi_start.py`: the first time a Python virtual environment is created and the required dependencies are downloaded and installed; then GUI is started. The next times, just the GUI is started.
+
+3. Execute `python jersi_start.py` on Linux and  double-click on`jersi_start.py` on Windows:
+
+   - On Windows, if needed, the first time, use `Open with ...` in order to associate `.py` file with your installed `python` interpreter.
+
+   - The first time a Python virtual environment is created and the required dependencies are downloaded and installed; then the GUI is started. 
+   - The next times, the GUI is just started.
+
 4. For un-installing *jersi_certu* just remove the installation directory.
+
 5. The above instructions might also work on other platforms, but only Windows and Linux have been tested.
 
 ### Used dependencies

jersi_start.py

@@ -21,7 +21,7 @@
 import os
 import subprocess
 import sys
-
+    
 
 _product_home = os.path.abspath(os.path.dirname(__file__))
 os.chdir(_product_home)
@@ -37,33 +37,65 @@
     print("Creating virtual environment ...")
     subprocess.run(args=[sys.executable, "-m", "venv", ".env"], shell=False, check=True)
     print("Creating virtual environment done")
-    install_dependencies = True
+    _install_dependencies = True
 
 else:
-    install_dependencies = False
+    _install_dependencies = False
 print("Checking virtual environment done")
 
 
+print()
+print("Determining the python executable ...")
 if os.name == 'nt':
-    _python_executable = os.path.join(_venv_home, "Scripts", "python.exe")
+    _venv_python_executable = os.path.join(_venv_home, "Scripts", "python.exe")
 
 elif os.name == 'posix':
-    _python_executable = os.path.join(_venv_home, "bin", "python")
+    _venv_python_executable = os.path.join(_venv_home, "bin", "python")
 
 else:
-    _python_executable = glob.glob(os.path.join(_venv_home, "*/python*"))[0]
+    _venv_python_executable = glob.glob(os.path.join(_venv_home, "*/python*"))[0]
 
+print("_venv_python_executable = ", _venv_python_executable)
+print("Determining the python executable done")
+
+
 
-if install_dependencies:
+if _install_dependencies:
     print()
     print("Installing dependencies ...")
-    subprocess.run(args=[_python_executable, "-m", "pip", "install", "-r", "requirements.txt"], shell=False, check=True)
+
+    if os.name == 'nt':
+        # windows fix to "import _ssl" failure after "import ssl" in "pip"
+        _sys_python_path = os.path.dirname(sys.executable)
+
+        if 'PATH' in os.environ:
+            os.environ['PATH'] =  (_sys_python_path + os.pathsep +
+                                  os.path.join(_sys_python_path, 'Scripts') + os.pathsep +
+                                  os.path.join(_sys_python_path, 'Library', 'bin') + os.pathsep +
+                                  os.environ['PATH'] )
+        else:
+            os.environ['PATH'] = (_sys_python_path + os.pathsep +
+                                  os.path.join(_sys_python_path, 'Scripts') + os.pathsep +
+                                  os.path.join(_sys_python_path, 'Library', 'bin') )
+
+
+    _venv_python_path = os.path.dirname(_venv_python_executable)
+
+    if 'PATH' in os.environ:
+        os.environ['PATH'] = _venv_python_path + os.pathsep + os.environ['PATH']
+    else:
+        os.environ['PATH'] = _venv_python_path
+
+    subprocess.run(args=[_venv_python_executable, "-c", "import ssl"], shell=False, check=True)
+
+    subprocess.run(args=[_venv_python_executable, "-m", "pip", "install", "--upgrade", "pip"], shell=False, check=True)
+    subprocess.run(args=[_venv_python_executable, "-m", "pip", "install", "-r", "requirements.txt"], shell=False, check=True)
     print("Installing dependencies done")
 
 
 print()
 print("jersi_gui ...")
-subprocess.run(args=[_python_executable, _jersi_gui_executable], shell=False, check=True)
+subprocess.run(args=[_venv_python_executable, _jersi_gui_executable], shell=False, check=True)
 print()
 print("jersi_gui done")