From 472cad1edb73fa70169d8042eadc1ad8aacbf4e3 Mon Sep 17 00:00:00 2001
From: Nathan Woodburn <github@nathan.woodburn.au>
Date: Fri, 13 Oct 2023 11:39:06 +1100
Subject: [PATCH] fix: Copy pipe usage

---
 copy | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/copy b/copy
index 334d285..436e089 100644
--- a/copy
+++ b/copy
@@ -1,32 +1,28 @@
 #!/bin/bash
 
-# Copy file contents to clipboard
+# Copy file contents or command output to clipboard
 # Usage: copy <file>
-#        ... | copy <file_name>
+#        ... | copy
 #
 # Author: Nathan Woodburn
 
 copy() {
-    if [ $# -eq 0 ]; then
-        echo "No arguments specified."
-        echo "Usage: copy <file>"
-        return 1
-    fi
-
     if tty -s; then
         file="$1"
-        if [ ! -e "$file" ]; then
+        if [ -n "$file" ] && [ ! -e "$file" ]; then
             echo "$file: No such file or directory" >&2
             return 1
         fi
 
         xclip -selection clipboard < "$file"
-
     else
-        file_name="$1"
-        xclip -selection clipboard < "$file_name"
+        xclip -selection clipboard
     fi
 }
 
-# Call the copy function with the provided arguments
-copy "$@"
+# Call the copy function with the provided arguments or from a pipe
+if [ -t 0 ]; then
+    copy "$@"
+else
+    copy
+fi