Remove support for Windows

If anyone wants to bring back support for Windows, they should start
nu adding github pipelines for testing it.

README.md

@@ -8,12 +8,12 @@
 not provided by Python.
 
 - [transparent Unicode support for text file operations (BOM detection)](https://tendo.readthedocs.io/#module-tendo.singleton)
-- enable you to use symlinks under windows
 - python tee implementation
 - [improved execfile](https://tendo.readthedocs.io/#module-tendo.execfile2)
 
 ## Requirements and Compatibility
 
+- POSIX-compatible operating system, including Linux and macOS
 - python 3.10 or newer
 - tox for running tests
 

pyproject.toml

@@ -22,7 +22,9 @@ classifiers = [
   "Intended Audience :: Information Technology",
   "Intended Audience :: System Administrators",
   "License :: OSI Approved :: Python Software Foundation License",
-  "Operating System :: OS Independent",
+  "Operating System :: MacOS",
+  "Operating System :: POSIX :: Linux",
+  "Operating System :: POSIX",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",

src/tendo/singleton.py

@@ -1,13 +1,11 @@
 #! /usr/bin/env python
 
+import fcntl
 import logging
 import os
 import sys
 import tempfile
 
-if sys.platform != "win32":
-    import fcntl
-
 
 class SingleInstanceException(BaseException):
     pass
@@ -46,28 +44,13 @@ def __init__(self, flavor_id="", lockfile=""):
         logger.debug(f"SingleInstance lockfile: {self.lockfile}")
 
     def __enter__(self):
-        if sys.platform == "win32":
-            try:
-                # file already exists, we try to remove (in case previous
-                # execution was interrupted)
-                if os.path.exists(self.lockfile):
-                    os.unlink(self.lockfile)
-                self.fd = os.open(self.lockfile, os.O_CREAT | os.O_EXCL | os.O_RDWR)
-            except OSError:
-                type, e, tb = sys.exc_info()
-                if e.errno == 13:
-                    logger.error("Another instance is already running, quitting.")
-                    raise SingleInstanceException
-                print(e.errno)
-                raise
-        else:  # non Windows
-            self.fp = open(self.lockfile, "w")
-            self.fp.flush()
-            try:
-                fcntl.lockf(self.fp, fcntl.LOCK_EX | fcntl.LOCK_NB)
-            except OSError:
-                logger.warning("Another instance is already running, quitting.")
-                raise SingleInstanceException
+        self.fp = open(self.lockfile, "w")
+        self.fp.flush()
+        try:
+            fcntl.lockf(self.fp, fcntl.LOCK_EX | fcntl.LOCK_NB)
+        except OSError:
+            logger.warning("Another instance is already running, quitting.")
+            raise SingleInstanceException
         self.initialized = True
         return self
 
@@ -77,15 +60,10 @@ def __exit__(self, exc_type, exc_value, exc_tb):
         if exc_value is not None:
             logger.warning("Error: %s" % exc_value, exc_info=True)
         try:
-            if sys.platform == "win32":
-                if hasattr(self, "fd"):
-                    os.close(self.fd)
-                    os.unlink(self.lockfile)
-            else:
-                fcntl.lockf(self.fp, fcntl.LOCK_UN)
-                # os.close(self.fp)
-                if os.path.isfile(self.lockfile):
-                    os.unlink(self.lockfile)
+            fcntl.lockf(self.fp, fcntl.LOCK_UN)
+            # os.close(self.fp)
+            if os.path.isfile(self.lockfile):
+                os.unlink(self.lockfile)
         except Exception as e:
             if logger:
                 logger.warning(e)

src/tendo/tee.py

@@ -30,10 +30,6 @@ def quote_command(cmd):
 
     This is required in order to prevent getting "The input line is too long" error message.
     """
-    if not (os.name == "nt" or os.name == "dos"):
-        # the escaping is required only on Windows platforms, in fact it will
-        # break cmd line on others
-        return cmd
     if '"' in cmd[1:-1]:
         cmd = '"' + cmd + '"'
     return cmd
@@ -247,13 +243,13 @@ def test_1(self):
         os.name = save
 
     def test_2(self):
-        self.assertEqual(system(["python", "-V"]), 0)
+        self.assertEqual(system([sys.executable, "-V"]), 0)
 
     def test_3(self):
-        self.assertEqual(system2(["python", "-V"])[0], 0)
+        self.assertEqual(system2([sys.executable, "-V"])[0], 0)
 
     def test_4(self):
-        self.assertEqual(system(["python", "-c", "print('c c')"]), 0)
+        self.assertEqual(system([sys.executable, "-c", "print('c c')"]), 0)
 
 
 if __name__ == "__main__":

src/tendo/tests/test_tee.py

@@ -1,4 +1,5 @@
 import os
+import sys
 
 from tendo.tee import quote_command, system, system2
 
@@ -36,12 +37,12 @@ def test_1():
 
 
 def test_2():
-    assert system(["python", "-V"]) == 0
+    assert system([sys.executable, "-V"]) == 0
 
 
 def test_3():
-    assert system2(["python", "-V"])[0] == 0
+    assert system2([sys.executable, "-V"])[0] == 0
 
 
 def test_4():
-    assert system(["python", "-c", "print('c c')"]) == 0
+    assert system([sys.executable, "-c", "print()"]) == 0