output to stderr, check if directory exists

.config/fish/functions/makeaway.fish

@@ -8,6 +8,13 @@ function makeaway
         return 0
     end
 
+    # Check if directory exists
+    set directory $argv[1]
+    if not test -d $directory
+        echo "Directory doesn't exists." 1>&2
+        return 1
+    end
+
     # Find the target
     set target ""
     if test (count $argv) -ge 3 && test "$argv[2]" = --
@@ -15,12 +22,12 @@ function makeaway
         set target $argv[3]
     else if test (count $argv) -ge 2 && test "$argv[2]" = --
         # User used "--" without target
-        echo "No target found."
+        echo "No target found." 1>&2
         return 1
     end
 
     # Make
-    cd $argv[1]
+    cd $directory
     make $target
     cd -
 end