first parse stdin, otherwise it is passed to textual

rexi/cli.py

@@ -56,20 +56,9 @@ def rexi_cli(
 
     If `--input FILE` is used, read the file content.
     """
-    # Input file provided
-    if input_file:
-        # Incompatible with a string argument
-        if text:
-            msg = (
-                "TEXT argument should be empty if in input is provided with "
-                "the `-i` flag."
-            )
-            raise typer.BadParameter(msg)
-
-        input_text = input_file.read()
-
     # Read stdin
-    elif not is_stdin_a_tty():
+    # Should be first, otherwise stdin is passed to textual
+    if not is_stdin_a_tty():
         input_text = sys.stdin.read()
         try:
             os.close(sys.stdin.fileno())
@@ -78,11 +67,28 @@ def rexi_cli(
         # Windows uses "con:" for stdin device name
         sys.stdin = open("con:" if os.name == "nt" else "/dev/tty", "rb")  # type: ignore[assignment]
 
+        # Incompatible with an input file argument
+        if input_file:
+            msg = "INPUT option should not be defined if text is piped through stdin."
+            raise typer.BadParameter(msg)
+
         # Incompatible with a string argument
         if text:
             msg = "TEXT argument should be empty if text is piped through stdin."
             raise typer.BadParameter(msg)
 
+    # Input file provided
+    elif input_file:
+        # Incompatible with a string argument
+        if text:
+            msg = (
+                "TEXT argument should be empty if in input is provided with "
+                "the `-i` flag."
+            )
+            raise typer.BadParameter(msg)
+
+        input_text = input_file.read()
+
     # Input string provided or fallback to empty string
     else:
         input_text = text or ""