add lua support

api/main.go

@@ -77,6 +77,7 @@ func Execute(res http.ResponseWriter, req *http.Request) {
         "java",
         "julia", "jl",
         "kotlin",
+        "lua",
         "nasm", "asm",
         "node", "javascript", "js",
         "perl", "pl",

lxc/execute

@@ -75,6 +75,9 @@ case "$lang" in
 "kotlin")
     bin=kotlin
     ;;
+"lua")
+    bin=lua
+    ;;
 "nasm" | "asm")
     bin=nasm
     ;;

lxc/executors/lua

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

lxc/versions

@@ -33,6 +33,9 @@ echo '---'
 echo 'kotlin'
 lxc-attach --clear-env -n piston -- /bin/bash -l -c "kotlinc -version 2>&1 | grep kotlin"
 echo "---"
+echo 'lua'
+lxc-attach --clear-env -n piston -- /bin/bash -l -c "lua -v"
+echo "---"
 echo 'nasm'
 lxc-attach --clear-env -n piston -- /bin/bash -l -c "nasm -version"
 echo '---'

readme.md

@@ -207,6 +207,17 @@ make
 echo 'export PATH=$PATH:/opt/emacs/emacs-26.3/src' >> /opt/.profile
 source /opt/.profile
 
+# install lua
+# final binary: /opt/lua/lua54/src/lua
+# get version: /opt/lua/lua54/src/lua -v
+cd /opt && mkdir lua && cd lua
+wget https://sourceforge.net/projects/luabinaries/files/5.4.0/Docs%20and%20Sources/lua-5.4.0_Sources.tar.gz/download
+tar -xzf download
+cd lua54
+make
+echo 'export PATH=$PATH:/opt/lua/lua54/src' >> /opt/.profile
+source /opt/.profile
+
 # create runnable users and apply limits
 for i in {1..150}; do
     useradd -M runner$i