update piston

api/main.go

@@ -71,6 +71,7 @@ func Execute(res http.ResponseWriter, req *http.Request) {
         "r",
         "ruby",
         "swift",
+        "brainfuck", "bf",
     }
 
     // check if the supplied language is supported

lxc/execute

@@ -81,6 +81,9 @@ case "$lang" in
 "swift")
     bin=swift
     ;;
+"brainfuck" | "bf")
+    bin=brainfuck
+    ;;
 *)
     echo "invalid language"
     exit

lxc/executors/brainfuck

@@ -0,0 +1,2 @@
+cd /tmp/$2
+runuser -l runner$1 -c "cd /tmp/$2 ; cat args.args | xargs -d '\n' timeout -s KILL 3 bf code.code"