From 2bfcd918a8fd0f8bc4ddb3ec7e17e26196233b78 Mon Sep 17 00:00:00 2001
From: Oscar Lesta <oscar.lesta@gmail.com>
Date: Wed, 11 Oct 2023 13:07:51 -0300
Subject: Distutils patch for Haiku

This is just the previous patch from Jerome Duval, but made to match
the rest of the code's string substitution style on `command/install.py`.

diff --git a/setuptools/_distutils/command/install.py b/setuptools/_distutils/command/install.py
index dc17e56..9cc802a 100644
--- a/setuptools/_distutils/command/install.py
+++ b/setuptools/_distutils/command/install.py
@@ -50,6 +50,33 @@ INSTALL_SCHEMES = {
         'data': '{base}',
     },
     'nt': WINDOWS_SCHEME,
+    'haiku': {
+        'purelib': '{base}/non-packaged/lib/{implementation_lower}'
+        '{py_version_short}/site-packages',
+        'platlib': '{platbase}/non-packaged/lib/{implementation_lower}'
+        '{py_version_short}/site-packages',
+        'headers': '{base}/non-packaged/develop/headers/{implementation_lower}'
+        '{py_version_short}/{dist_name}',
+        'scripts': '{base}/non-packaged/bin',
+        'data'   : '{base}/non-packaged',
+        },
+    'haiku_vendor': {
+        'purelib': '{base}/lib/{implementation_lower}'
+        '{py_version_short}/vendor-packages',
+        'platlib': '{platbase}/lib/{implementation_lower}'
+        '{py_version_short}/vendor-packages',
+        'headers': '{base}/develop/headers/{implementation_lower}'
+        '{py_version_short}/{dist_name}',
+        'scripts': '{base}/bin',
+        'data'   : '{base}',
+        },
+    'haiku_home': {
+        'purelib': '{base}/lib/python',
+        'platlib': '{base}/lib/python',
+        'headers': '{base}/develop/headers/python/{dist_name}',
+        'scripts': '{base}/bin',
+        'data'   : '{base}',
+        },
     'pypy': {
         'purelib': '{base}/site-packages',
         'platlib': '{base}/site-packages',
@@ -86,7 +113,14 @@ if HAS_USER_SITE:
         'data': '{userbase}',
     }
 
-
+    INSTALL_SCHEMES['haiku_user'] = {
+        'purelib': '{usersite}',
+        'platlib': '{usersite}',
+        'headers': '{usersite}/develop/headers/{implementation}'
+        '{py_version_short}/{dist_name}',
+        'scripts': '{usersite}/bin',
+        'data'   : '{usersite}',
+        }
 INSTALL_SCHEMES.update(fw.schemes)
 
 
@@ -548,10 +582,16 @@ class install(Command):
             if self.install_userbase is None:
                 raise DistutilsPlatformError("User base directory is not specified")
             self.install_base = self.install_platbase = self.install_userbase
-            self.select_scheme("posix_user")
+            if sys.platform.startswith('haiku'):
+                self.select_scheme("haiku_user")
+            else:
+                self.select_scheme("posix_user")
         elif self.home is not None:
             self.install_base = self.install_platbase = self.home
-            self.select_scheme("posix_home")
+            if sys.platform.startswith('haiku'):
+                self.select_scheme("haiku_home")
+            else:
+                self.select_scheme("posix_home")
         else:
             if self.prefix is None:
                 if self.exec_prefix is not None:
@@ -571,7 +611,13 @@ class install(Command):
 
             self.install_base = self.prefix
             self.install_platbase = self.exec_prefix
-            self.select_scheme("posix_prefix")
+            if sys.platform.startswith('haiku'):
+                if os.environ.get('HAIKU_USE_VENDOR_DIRECTORIES') == '1':
+                    self.select_scheme("haiku_vendor")
+                else:
+                    self.select_scheme("haiku")
+            else:
+                self.select_scheme("posix_prefix")
 
     def finalize_other(self) -> None:
         """Finalizes options for non-posix platforms"""
diff --git a/setuptools/_distutils/sysconfig.py b/setuptools/_distutils/sysconfig.py
index 7ddc869..a47f227 100644
--- a/setuptools/_distutils/sysconfig.py
+++ b/setuptools/_distutils/sysconfig.py
@@ -205,7 +205,8 @@ def _get_python_inc_from_config(plat_specific, spec_prefix):
 def _get_python_inc_posix_prefix(prefix):
     implementation = 'pypy' if IS_PYPY else 'python'
     python_dir = implementation + get_python_version() + build_flags
-    return os.path.join(prefix, "include", python_dir)
+    inc_dir = "include" if sys.platform != "haiku1" else "develop/headers"
+    return os.path.join(prefix, inc_dir, python_dir)
 
 
 def _get_python_inc_nt(prefix, spec_prefix, plat_specific):
@@ -252,7 +253,14 @@ def get_python_lib(
         else:
             prefix = plat_specific and EXEC_PREFIX or PREFIX
 
-    if os.name == "posix" or is_mingw():
+    if os.name == "posix" and sys.platform.startswith('haiku'):
+        if standard_lib:
+            return os.path.join(prefix,
+                                "lib", "python" + get_python_version())
+        return os.path.join(prefix, "non-packaged",
+                            "lib", "python" + get_python_version(),
+                            "site-packages")
+    elif os.name == "posix" or is_mingw():
         if plat_specific or standard_lib:
             # Platform-specific modules (any module from a non-pure-Python
             # module distribution) or standard Python library modules.
-- 
2.48.1