Kentzo · October 16, 2022 06:38 · Oct 16, 2022 · Oct 12, 2022 · Oct 12, 2022
diff --git a/file.py b/file.py
@@ -33,11 +33,10 @@ def file_proc():
 @contextlib.contextmanager
 def file_typer():
     proc = file_proc()
-    proc.send(None)
 
     def getter(path):
-        posix_type = proc.send(path.as_posix())
         proc.send(None)
+        posix_type = proc.send(path.as_posix())
         return posix_type
 
     with contextlib.closing(proc):

diff --git a/file.py b/file.py
@@ -0,0 +1,48 @@
+import contextlib
+import subprocess
+
+def file_proc():
+    args = [
+        '/usr/bin/file',
+        '--brief',
+        '-E',
+        '--no-dereference',
+        '--no-buffer',
+        '--preserve-date',
+        '-00',
+        '--mime-type',
+        '--files-from', '-'
+    ]
+
+    with contextlib.ExitStack() as stack:
+        proc = subprocess.Popen(args, bufsize=0, stdin=subprocess.PIPE, stdout=subprocess.PIPE, preexec_fn=None, text=True)
+        stack.callback(proc.kill)
+
+        while True:
+            file_path = yield
+            proc.stdin.write(file_path + '\n')
+            proc.stdin.flush()
+
+            file_type = ''
+            while (c := proc.stdout.read(1)) != '\0':
+                file_type += c
+
+            yield file_type.splitlines()[0]
+
+
+@contextlib.contextmanager
+def file_typer():
+    proc = file_proc()
+    proc.send(None)
+
+    def getter(path):
+        posix_type = proc.send(path.as_posix())
+        proc.send(None)
+        return posix_type
+
+    with contextlib.closing(proc):
+        yield getter
+
+
+with file_typer() as typer:
+  typer('/usr/bin/python')