Don't run onefetch if you don't have it

bash/prompt.sh

@@ -12,7 +12,11 @@ fi
 # If directory was just changed to the root of a git repository, print onefetch
 if [ -n "$DIRCHANGED" ]; then
     if [ -d "$PWD/.git" ]; then
-        ${HOME}/bin/onefetch
+	if [[ "$(which onefetch)" == "" ]]; then
+	    echo "This is a git directory, but you don't have 'onefetch' in your PATH"
+        else
+            onefetch
+	fi
     fi
     unset DIRCHANGED
 fi