Renamed .get_writer to .best and removed boolean argument.

CHANGES.txt

@@ -10,6 +10,8 @@ CHANGES
   ``build.executable``, such that an executable of "/usr/bin/env my-python" may
   be specified. This means that systems with a specified executable whose name
   has spaces in the path must be updated to escape or quote that value.
+* Deprecated ``easy_install.ScriptWriter.get_writer``, replaced by ``.best()``
+  with slightly different semantics (no force_windows flag).
 
 ------
 11.3.1

setuptools/command/easy_install.py

@@ -742,7 +742,7 @@ Please make the appropriate changes for your system and try again.
 
     def install_wrapper_scripts(self, dist):
         if not self.exclude_scripts:
-            for args in ScriptWriter.get_args(dist):
+            for args in ScriptWriter.best().get_args(dist):
                 self.write_script(*args)
 
     def install_script(self, dist, script_name, script_text, dev_path=None):
@@ -1975,7 +1975,7 @@ class ScriptWriter(object):
     def get_script_args(cls, dist, executable=None, wininst=False):
         # for backward compatibility
         warnings.warn("Use get_args", DeprecationWarning)
-        writer = cls.get_writer(wininst)
+        writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
         header = cls.get_script_header("", executable, wininst)
         return writer.get_args(dist, header)
 
@@ -2007,9 +2007,16 @@ class ScriptWriter(object):
 
     @classmethod
     def get_writer(cls, force_windows):
-        if force_windows or sys.platform == 'win32':
-            return WindowsScriptWriter.get_writer()
-        return cls
+        # for backward compatibility
+        warnings.warn("Use best", DeprecationWarning)
+        return WindowsScriptWriter.best() if force_windows else cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter for this environment.
+        """
+        return WindowsScriptWriter.best() if sys.platform == 'win32' else cls
 
     @classmethod
     def _get_script_args(cls, type_, name, header, script_text):
@@ -2027,8 +2034,14 @@ class ScriptWriter(object):
 class WindowsScriptWriter(ScriptWriter):
     @classmethod
     def get_writer(cls):
+        # for backward compatibility
+        warnings.warn("Use best", DeprecationWarning)
+        return cls.best()
+
+    @classmethod
+    def best(cls):
         """
-        Get a script writer suitable for Windows
+        Select the best ScriptWriter suitable for Windows
         """
         writer_lookup = dict(
             executable=WindowsExecutableLauncherWriter,

setuptools/command/install_scripts.py

@@ -13,7 +13,7 @@ class install_scripts(orig.install_scripts):
         self.no_ep = False
 
     def run(self):
-        from setuptools.command.easy_install import ScriptWriter, CommandSpec
+        import setuptools.command.easy_install as ei
 
         self.run_command("egg_info")
         if self.distribution.scripts:
@@ -30,14 +30,15 @@ class install_scripts(orig.install_scripts):
             ei_cmd.egg_name, ei_cmd.egg_version,
         )
         bs_cmd = self.get_finalized_command('build_scripts')
-        cmd = CommandSpec.from_param(getattr(bs_cmd, 'executable', None))
+        cmd = ei.CommandSpec.from_param(getattr(bs_cmd, 'executable', None))
         is_wininst = getattr(
             self.get_finalized_command("bdist_wininst"), '_is_running', False
         )
+        writer = ei.ScriptWriter
         if is_wininst:
-            cmd = CommandSpec.from_string("python.exe")
-        writer = ScriptWriter.get_writer(force_windows=is_wininst)
-        for args in writer.get_args(dist, cmd.as_header()):
+            cmd = ei.CommandSpec.from_string("python.exe")
+            writer = ei.WindowsScriptWriter
+        for args in writer.best().get_args(dist, cmd.as_header()):
             self.write_script(*args)
 
     def write_script(self, script_name, contents, mode="t", *ignored):