From 2dafe81f97e16e87984cb0b4c656cec65d1371ad Mon Sep 17 00:00:00 2001
From: Johannes Altmanninger <aclopte@gmail.com>
Date: Sun, 13 Oct 2024 10:31:32 +0200
Subject: [PATCH] Builtin source to print error if missing both file argument
 and piped stdin

Closes #10774
---
 src/builtins/source.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/builtins/source.rs b/src/builtins/source.rs
index 5acb73af6..edf8d9bfb 100644
--- a/src/builtins/source.rs
+++ b/src/builtins/source.rs
@@ -45,6 +45,10 @@ pub fn source(parser: &Parser, streams: &mut IoStreams, args: &mut [&wstr]) -> O
         // Either a bare `source` which means to implicitly read from stdin or an explicit `-`.
         if argc == optind && isatty(streams.stdin_fd) {
             // Don't implicitly read from the terminal.
+            streams.err.append(wgettext_fmt!(
+                "%ls: missing filename argument or input redirection\n",
+                cmd
+            ));
             return STATUS_CMD_ERROR;
         }
         func_filename = FilenameRef::new(L!("-").to_owned());