feat: initial commit; NixOS Era

pkgs/fish/functions/clip.fish

@@ -0,0 +1,26 @@
+function clip
+    if not command -q xclip
+		echoerr "clip: 'xclip' is not available on this system"
+		return 1
+	end
+
+	if not tty -s
+		set -l stdin
+		read stdin -z
+	end
+
+	if set -ql stdin
+		echo "$stdin" | xclip -selection clipboard
+		echo "copied into clipboard (stdin)"
+		return 0
+	end
+
+	if [ -n "$(string trim -- $argv)" ]
+		echo "$argv" | xclip -selection clipboard
+		echo "copied into clipboard"
+		return 0
+	end
+
+	xclip -selection clipboard -o
+end
+