pkgs/development/interpreters/lua-5/hooks/setup-hook.sh

   1 # set -e
   2
   3 nix_print() {
   4   if [ ${NIX_DEBUG:-0} -ge $1 ]; then
   5     echo "$2"
   6   fi
   7 }
   8
   9 nix_debug() {
  10   nix_print 3 "$1"
  11 }
  12
  13 addToLuaSearchPathWithCustomDelimiter() {
  14   local varName="$1"
  15   local absPattern="$2"
  16   # delete longest match starting from the lua placeholder '?'
  17   local topDir="${absPattern%%\?*}"
  18
  19   # export only if the folder exists else LUA_PATH/LUA_CPATH grow too large
  20   if [[ ! -d "$topDir" ]]; then return; fi
  21
  22   # export only if we haven't already got this dir in the search path
  23   if [[ ${!varName-} == *"$absPattern"* ]]; then return; fi
  24
  25   export "${varName}=${!varName:+${!varName};}${absPattern}"
  26 }
  27
  28 addToLuaPath() {
  29   local dir="$1"
  30
  31   if [[ ! -d "$dir" ]]; then
  32     nix_debug "$dir not a directory abort"
  33     return 0
  34   fi
  35   cd "$dir"
  36   for pattern in @luapathsearchpaths@; do
  37     addToLuaSearchPathWithCustomDelimiter LUA_PATH "$PWD/$pattern"
  38   done
  39
  40   # LUA_CPATH
  41   for pattern in @luacpathsearchpaths@; do
  42     addToLuaSearchPathWithCustomDelimiter LUA_CPATH "$PWD/$pattern"
  43   done
  44   cd - >/dev/null
  45 }
  46
  47 addEnvHooks "$hostOffset" addToLuaPath