avoid distutils, no longer in python 3.12

ox/file.py

@@ -2,7 +2,6 @@
 # vi:si:et:sw=4:sts=4:ts=4
 # GPL 2008
 from __future__ import division, print_function
-from distutils.spawn import find_executable
 from glob import glob
 import hashlib
 import os
@@ -39,6 +38,21 @@ EXTENSIONS = {
     ],
 }
 
+def is_exe(fpath):
+    return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+def which(program):
+    fpath, fname = os.path.split(program)
+    if fpath:
+        if is_exe(program):
+            return program
+    else:
+        for path in os.environ.get("PATH", "").split(os.pathsep):
+            exe_file = os.path.join(path, program)
+            if is_exe(exe_file):
+                return exe_file
+    return None
+
 def cmd(program):
     local = os.path.expanduser('~/.ox/bin/%s' % program)
     if os.path.exists(local):
@@ -160,12 +174,11 @@ def avinfo(filename, cached=True):
     if cached:
         return cache(filename, 'info')
     if os.path.getsize(filename):
-        if find_executable('ffprobe'):
+        if which('ffprobe'):
             return ffprobe(filename)
         raise EnvironmentError('could to find ffprobe. please install ffmpeg')
     return {'path': filename, 'size': 0}
 
-
 def ffprobe(filename):
     p = subprocess.Popen([
         cmd('ffprobe'),