use ansys-tool-path, instead of using the env variable (#116)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Roberto Pastor Muela <[email protected]>

pyproject.toml

@@ -20,6 +20,7 @@ dependencies = [
     "appdirs",
     "requests",
     "PySide6",
+    "ansys-tools-path",
 ]
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -43,6 +44,7 @@ tests = [
     "appdirs==1.4.4",
     "requests==2.31.0",
     "PySide6==6.5.1.1",
+    "ansys-tools-path==0.2.4",
     "pytest==7.3.2",
     "pytest-cov==4.1.0",
     "pytest-qt==4.2.0",
@@ -59,6 +61,7 @@ freeze = [
     "appdirs==1.4.4",
     "requests==2.31.0",
     "PySide6==6.5.1.1",
+    "ansys-tools-path==0.2.4",
 ]
 
 [tool.flit.module]

src/ansys/tools/installer/constants.py

@@ -25,8 +25,6 @@
 
 ANSYS_VENVS = ".ansys_python_venvs"
 
-ANSYS_ENV_VAR_START = "awp_root"
-
 ANSYS_SUPPORTED_PYTHON_VERSIONS = ["3_7", "3_10"]
 
 INSTALL_TEXT = """Choose to use either the standard Python install from <a href='https://www.python.org/'>python.org</a> or <a href='https://github.com/conda-forge/miniforge'>miniforge</a>."""

src/ansys/tools/installer/find_python.py

@@ -5,11 +5,9 @@
 from pathlib import Path
 import subprocess
 
-from ansys.tools.installer.constants import (
-    ANSYS_ENV_VAR_START,
-    ANSYS_SUPPORTED_PYTHON_VERSIONS,
-    ANSYS_VENVS,
-)
+from ansys.tools.path import get_available_ansys_installations
+
+from ansys.tools.installer.constants import ANSYS_SUPPORTED_PYTHON_VERSIONS, ANSYS_VENVS
 
 # only used on windows
 try:
@@ -104,21 +102,12 @@ def _find_installed_python_win(admin=False):
     return paths
 
 
-def _find_installed_ansys_win():
-    """Check the environment variables for Ansys installations."""
-    env_keys = []
-    for key in os.environ.keys():
-        if key.lower().startswith(ANSYS_ENV_VAR_START):
-            env_keys.append(key)
-    return env_keys
-
-
 def _find_installed_ansys_python_win():
     """Check the Ansys installation folder for installed Python."""
-    installed_ansys = _find_installed_ansys_win()
+    installed_ansys = get_available_ansys_installations()
     paths = {}
-    for ansys_ver_env_key in installed_ansys:
-        ansys_path = os.environ[ansys_ver_env_key]
+    for ver in installed_ansys:
+        ansys_path = installed_ansys[ver]
         for ansys_py_ver in ANSYS_SUPPORTED_PYTHON_VERSIONS:
             path = os.path.join(
                 ansys_path,