gh-103708: Make directory layout in sysconfig implementation configurable (#103709)

3 files changed, 52 insertions, 39 deletions

diff --git a/Lib/site.py b/Lib/site.py
index 2517b7e..6f5738b 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -260,6 +260,10 @@ def check_enableusersite():
 #
 # See https://bugs.python.org/issue29585
 
+# Copy of sysconfig._get_implementation()
+def _get_implementation():
+    return 'Python'
+
 # Copy of sysconfig._getuserbase()
 def _getuserbase():
     env_base = os.environ.get("PYTHONUSERBASE", None)
@@ -275,7 +279,7 @@ def _getuserbase():
 
     if os.name == "nt":
         base = os.environ.get("APPDATA") or "~"
-        return joinuser(base, "Python")
+        return joinuser(base, _get_implementation())
 
     if sys.platform == "darwin" and sys._framework:
         return joinuser("~", "Library", sys._framework,
@@ -288,12 +292,14 @@ def _getuserbase():
 def _get_path(userbase):
     version = sys.version_info
 
+    implementation = _get_implementation()
+    implementation_lower = implementation.lower()
     if os.name == 'nt':
         ver_nodot = sys.winver.replace('.', '')
-        return f'{userbase}\\Python{ver_nodot}\\site-packages'
+        return f'{userbase}\\{implementation}{ver_nodot}\\site-packages'
 
     if sys.platform == 'darwin' and sys._framework:
-        return f'{userbase}/lib/python/site-packages'
+        return f'{userbase}/lib/{implementation_lower}/site-packages'
 
     return f'{userbase}/lib/python{version[0]}.{version[1]}/site-packages'
 
@@ -361,6 +367,8 @@ def getsitepackages(prefixes=None):
             continue
         seen.add(prefix)
 
+        implementation = _get_implementation().lower()
+        ver = sys.version_info
         if os.sep == '/':
             libdirs = [sys.platlibdir]
             if sys.platlibdir != "lib":
@@ -368,7 +376,7 @@ def getsitepackages(prefixes=None):
 
             for libdir in libdirs:
                 path = os.path.join(prefix, libdir,
-                                    "python%d.%d" % sys.version_info[:2],
+                                    f"{implementation}{ver[0]}.{ver[1]}",
                                     "site-packages")
                 sitepackages.append(path)
         else:
diff --git a/Lib/sysconfig/__init__.py b/Lib/sysconfig/__init__.py
index deb438c..07ab27c 100644
--- a/Lib/sysconfig/__init__.py
+++ b/Lib/sysconfig/__init__.py
@@ -26,24 +26,24 @@ _ALWAYS_STR = {
 
 _INSTALL_SCHEMES = {
     'posix_prefix': {
-        'stdlib': '{installed_base}/{platlibdir}/python{py_version_short}',
-        'platstdlib': '{platbase}/{platlibdir}/python{py_version_short}',
-        'purelib': '{base}/lib/python{py_version_short}/site-packages',
-        'platlib': '{platbase}/{platlibdir}/python{py_version_short}/site-packages',
+        'stdlib': '{installed_base}/{platlibdir}/{implementation_lower}{py_version_short}',
+        'platstdlib': '{platbase}/{platlibdir}/{implementation_lower}{py_version_short}',
+        'purelib': '{base}/lib/{implementation_lower}{py_version_short}/site-packages',
+        'platlib': '{platbase}/{platlibdir}/{implementation_lower}{py_version_short}/site-packages',
         'include':
-            '{installed_base}/include/python{py_version_short}{abiflags}',
+            '{installed_base}/include/{implementation_lower}{py_version_short}{abiflags}',
         'platinclude':
-            '{installed_platbase}/include/python{py_version_short}{abiflags}',
+            '{installed_platbase}/include/{implementation_lower}{py_version_short}{abiflags}',
         'scripts': '{base}/bin',
         'data': '{base}',
         },
     'posix_home': {
-        'stdlib': '{installed_base}/lib/python',
-        'platstdlib': '{base}/lib/python',
-        'purelib': '{base}/lib/python',
-        'platlib': '{base}/lib/python',
-        'include': '{installed_base}/include/python',
-        'platinclude': '{installed_base}/include/python',
+        'stdlib': '{installed_base}/lib/{implementation_lower}',
+        'platstdlib': '{base}/lib/{implementation_lower}',
+        'purelib': '{base}/lib/{implementation_lower}',
+        'platlib': '{base}/lib/{implementation_lower}',
+        'include': '{installed_base}/include/{implementation_lower}',
+        'platinclude': '{installed_base}/include/{implementation_lower}',
         'scripts': '{base}/bin',
         'data': '{base}',
         },
@@ -75,14 +75,14 @@ _INSTALL_SCHEMES = {
     # Downstream distributors who patch posix_prefix/nt scheme are encouraged to
     # leave the following schemes unchanged
     'posix_venv': {
-        'stdlib': '{installed_base}/{platlibdir}/python{py_version_short}',
-        'platstdlib': '{platbase}/{platlibdir}/python{py_version_short}',
-        'purelib': '{base}/lib/python{py_version_short}/site-packages',
-        'platlib': '{platbase}/{platlibdir}/python{py_version_short}/site-packages',
+        'stdlib': '{installed_base}/{platlibdir}/{implementation_lower}{py_version_short}',
+        'platstdlib': '{platbase}/{platlibdir}/{implementation_lower}{py_version_short}',
+        'purelib': '{base}/lib/{implementation_lower}{py_version_short}/site-packages',
+        'platlib': '{platbase}/{platlibdir}/{implementation_lower}{py_version_short}/site-packages',
         'include':
-            '{installed_base}/include/python{py_version_short}{abiflags}',
+            '{installed_base}/include/{implementation_lower}{py_version_short}{abiflags}',
         'platinclude':
-            '{installed_platbase}/include/python{py_version_short}{abiflags}',
+            '{installed_platbase}/include/{implementation_lower}{py_version_short}{abiflags}',
         'scripts': '{base}/bin',
         'data': '{base}',
         },
@@ -104,6 +104,8 @@ if os.name == 'nt':
 else:
     _INSTALL_SCHEMES['venv'] = _INSTALL_SCHEMES['posix_venv']
 
+def _get_implementation():
+    return 'Python'
 
 # NOTE: site.py has copy of this function.
 # Sync it when modify this function.
@@ -121,7 +123,7 @@ def _getuserbase():
 
     if os.name == "nt":
         base = os.environ.get("APPDATA") or "~"
-        return joinuser(base, "Python")
+        return joinuser(base,  _get_implementation())
 
     if sys.platform == "darwin" and sys._framework:
         return joinuser("~", "Library", sys._framework,
@@ -135,29 +137,29 @@ if _HAS_USER_BASE:
     _INSTALL_SCHEMES |= {
         # NOTE: When modifying "purelib" scheme, update site._get_path() too.
         'nt_user': {
-            'stdlib': '{userbase}/Python{py_version_nodot_plat}',
-            'platstdlib': '{userbase}/Python{py_version_nodot_plat}',
-            'purelib': '{userbase}/Python{py_version_nodot_plat}/site-packages',
-            'platlib': '{userbase}/Python{py_version_nodot_plat}/site-packages',
-            'include': '{userbase}/Python{py_version_nodot_plat}/Include',
-            'scripts': '{userbase}/Python{py_version_nodot_plat}/Scripts',
+            'stdlib': '{userbase}/{implementation}{py_version_nodot_plat}',
+            'platstdlib': '{userbase}/{implementation}{py_version_nodot_plat}',
+            'purelib': '{userbase}/{implementation}{py_version_nodot_plat}/site-packages',
+            'platlib': '{userbase}/{implementation}{py_version_nodot_plat}/site-packages',
+            'include': '{userbase}/{implementation}{py_version_nodot_plat}/Include',
+            'scripts': '{userbase}/{implementation}{py_version_nodot_plat}/Scripts',
             'data': '{userbase}',
             },
         'posix_user': {
-            'stdlib': '{userbase}/{platlibdir}/python{py_version_short}',
-            'platstdlib': '{userbase}/{platlibdir}/python{py_version_short}',
-            'purelib': '{userbase}/lib/python{py_version_short}/site-packages',
-            'platlib': '{userbase}/lib/python{py_version_short}/site-packages',
-            'include': '{userbase}/include/python{py_version_short}',
+            'stdlib': '{userbase}/{platlibdir}/{implementation_lower}{py_version_short}',
+            'platstdlib': '{userbase}/{platlibdir}/{implementation_lower}{py_version_short}',
+            'purelib': '{userbase}/lib/{implementation_lower}{py_version_short}/site-packages',
+            'platlib': '{userbase}/lib/{implementation_lower}{py_version_short}/site-packages',
+            'include': '{userbase}/include/{implementation_lower}{py_version_short}',
             'scripts': '{userbase}/bin',
             'data': '{userbase}',
             },
         'osx_framework_user': {
-            'stdlib': '{userbase}/lib/python',
-            'platstdlib': '{userbase}/lib/python',
-            'purelib': '{userbase}/lib/python/site-packages',
-            'platlib': '{userbase}/lib/python/site-packages',
-            'include': '{userbase}/include/python{py_version_short}',
+            'stdlib': '{userbase}/lib/{implementation_lower}',
+            'platstdlib': '{userbase}/lib/{implementation_lower}',
+            'purelib': '{userbase}/lib/{implementation_lower}/site-packages',
+            'platlib': '{userbase}/lib/{implementation_lower}/site-packages',
+            'include': '{userbase}/include/{implementation_lower}{py_version_short}',
             'scripts': '{userbase}/bin',
             'data': '{userbase}',
             },
@@ -459,6 +461,8 @@ def _init_config_vars():
     _CONFIG_VARS['platbase'] = _EXEC_PREFIX
     _CONFIG_VARS['projectbase'] = _PROJECT_BASE
     _CONFIG_VARS['platlibdir'] = sys.platlibdir
+    _CONFIG_VARS['implementation'] = _get_implementation()
+    _CONFIG_VARS['implementation_lower'] = _get_implementation().lower()
     try:
         _CONFIG_VARS['abiflags'] = sys.abiflags
     except AttributeError:
diff --git a/Misc/NEWS.d/next/Library/2023-04-23-11-08-02.gh-issue-103708.Y17C7p.rst b/Misc/NEWS.d/next/Library/2023-04-23-11-08-02.gh-issue-103708.Y17C7p.rst
new file mode 100644
index 0000000..4b7d747
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-04-23-11-08-02.gh-issue-103708.Y17C7p.rst
@@ -0,0 +1 @@
+Make hardcoded python name, a configurable parameter so that different implementations of python can override it instead of making huge diffs in sysconfig.py