Fix: executables creation in Windows PyPy <= 3.6

Also passes unit tests in test_creator.py

.coveragerc

@@ -18,7 +18,8 @@ source =
     src
     .tox/*/lib/python*/site-packages
     .tox/pypy*/site-packages
-    .tox\*\Lib\site-packages\
+    .tox\*\Lib\site-packages
+    .tox\py\site-packages
     */src
     *\src
 

src/virtualenv/create/creator.py

@@ -227,7 +227,13 @@ def get_env_debug_info(env_exe, debug_script, app_data, env):
     # noinspection PyBroadException
     try:
         if code != 0:
-            result = literal_eval(out)
+            if out:
+                result = literal_eval(out)
+            else:
+                if code == 2 and "file" in err:
+                    # Re-raise FileNotFoundError from `run_cmd()`
+                    raise OSError(err)
+                raise Exception(err)
         else:
             result = json.loads(out)
         if err:

src/virtualenv/create/via_global_ref/builtin/pypy/common.py

@@ -23,6 +23,11 @@ def _executables(cls, interpreter):
         must = RefMust.COPY if interpreter.version_info.major == 2 else RefMust.NA
         yield host, targets, must, RefWhen.ANY
 
+    @classmethod
+    def executables(cls, interpreter):
+        for src in super(PyPy, cls).sources(interpreter):
+            yield src
+
     @classmethod
     def exe_names(cls, interpreter):
         return {
@@ -34,8 +39,8 @@ def exe_names(cls, interpreter):
 
     @classmethod
     def sources(cls, interpreter):
-        for src in super(PyPy, cls).sources(interpreter):
-            yield src
+        for exe in cls.executables(interpreter):
+            yield exe
         for host in cls._add_shared_libs(interpreter):
             yield PathRefToDest(host, dest=lambda self, s: self.bin_dir / s.name)
 

src/virtualenv/create/via_global_ref/builtin/pypy/pypy3.py

@@ -66,9 +66,15 @@ def sources(cls, interpreter):
 class Pypy3Windows(PyPy3, WindowsSupports):
     """PyPy 3 on Windows"""
 
+    @property
+    def less_v37(self):
+        return self.interpreter.version_info.minor < 7
+
     @property
     def stdlib(self):
         """PyPy3 respects sysconfig only for the host python, virtual envs is instead Lib/site-packages"""
+        if self.less_v37:
+            return self.dest / "site-packages"
         return self.dest / "Lib" / "site-packages"
 
     @property

src/virtualenv/create/via_global_ref/venv.py

@@ -10,6 +10,7 @@
 from virtualenv.util.subprocess import run_cmd
 
 from .api import ViaGlobalRefApi, ViaGlobalRefMeta
+from .builtin.pypy.pypy3 import Pypy3Windows
 
 
 class Venv(ViaGlobalRefApi):
@@ -41,6 +42,18 @@ def create(self):
         for lib in self.libs:
             ensure_dir(lib)
         super(Venv, self).create()
+        self.executables_for_win_pypy_less_v37()
+
+    def executables_for_win_pypy_less_v37(self):
+        """
+        PyPy <= 3.6 (v7.3.3) for Windows contains only pypy3.exe and pypy3w.exe
+        Venv does not handle non-existing exe sources, e.g. python.exe, so this
+        patch does it.
+        """
+        creator = self.describe
+        if isinstance(creator, Pypy3Windows) and creator.less_v37:
+            for exe in creator.executables(self.interpreter):
+                exe.run(creator, self.symlinks)
 
     def create_inline(self):
         from venv import EnvBuilder

src/virtualenv/util/subprocess/__init__.py

@@ -27,8 +27,11 @@ def run_cmd(cmd):
         )
         out, err = process.communicate()  # input disabled
         code = process.returncode
-    except OSError as os_error:
-        code, out, err = os_error.errno, "", os_error.strerror
+    except OSError as error:
+        code, out, err = error.errno, "", error.strerror
+        if code == 2 and "file" in err:
+            # FileNotFoundError in Python >= 3.3
+            err = str(error)
     return code, out, err