# Node Version Manager
# Implemented as a bash function
# To use source this file from your bash profile
#
# Implemented by Tim Caswell <tim@creationix.com>
# with much bash help from Matthew Ranney

nvm()
{
  START=`pwd`
  if [ $# -lt 1 ]; then
    nvm help
    return
  fi
  case $1 in
    "help" )
      echo
      echo "Node Version Manager"
      echo
      echo "Usage:"
      echo "    nvm help            (Show this message)"
      echo "    nvm install version (Download and install a released version)"
      echo "    nvm list            (Show all installed versions)"
      echo "    nvm use version     (Set this version in the PATH)"
      echo "    nvm use             (Use the latest stable version)"
      echo "    nvm deactivate      (Remove nvm entry from PATH)"
      echo "    nvm addlib          (Copies the module in cwd to the current env)"
      echo "    nvm linklib         (Links the module in cwd to the current env)"
      echo "    nvm listlibs        (Show the modules in the current env)"
      echo
      echo "Example:"
      echo "    nvm install v0.1.94"
      echo
    ;;
    "install" )
      if [ $# -ne 2 ]; then
        nvm help
        return;
      fi
      mkdir -p "$NVM_DIR/src" && \
      cd "$NVM_DIR/src" && \
      wget "http://nodejs.org/dist/node-$2.tar.gz" -N && \
      tar -xzf "node-$2.tar.gz" && \
      cd "node-$2" && \
      ./configure --prefix="$NVM_DIR/$2" && \
      make && \
      make install && \
      nvm use $2
      cd $START
    ;;
    "deactivate" )
      if [[ $PATH == *$NVM_DIR/*/bin* ]]; then
        export PATH=${PATH%$NVM_DIR/*/bin*}${PATH#*$NVM_DIR/*/bin:}
        unset NODE_PATH
        echo "$NVM_DIR/*/bin removed from \$PATH"
      else
        echo "Could not find $NVM_DIR/*/bin in \$PATH"
      fi
    ;;
    "addlib" )
      mkdir -p $NODE_PATH
      mkdir -p $NODE_BIN
      if [ -d `pwd`/lib ]; then
        cp -r `pwd`/lib/ "$NODE_PATH/"
        cp -r `pwd`/bin/ "$NODE_BIN/"
      else
        echo "Can't find lib dir at `pwd`/lib"
      fi
    ;;
    "linklib" )
      mkdir -p $NODE_PATH
      mkdir -p $NODE_BIN
      if [ -d `pwd`/lib ]; then
        ln -sf `pwd`/lib/* "$NODE_PATH/"
        ln -sf `pwd`/bin/* "$NODE_BIN/"
      else
        echo "Can't find lib dir at `pwd`/lib"
      fi
    ;;
    "use" )
      if [ $# -ne 2 ]; then
        for f in $NVM_DIR/v*; do
          nvm use ${f##*/} > /dev/null
        done
        return;
      fi
      if [ ! -d $NVM_DIR/$2 ]; then
        echo "$2 version is not installed yet"
        return;
      fi
      if [[ $PATH == *$NVM_DIR/*/bin* ]]; then
        PATH=${PATH%$NVM_DIR/*/bin*}$NVM_DIR/$2/bin${PATH#*$NVM_DIR/*/bin}
      else
        PATH="$NVM_DIR/$2/bin:$PATH"
      fi
      export PATH
      export NODE_PATH="$NVM_DIR/$2/lib/node"
      export NODE_BIN="$NVM_DIR/$2/bin"
      mkdir -p "$NODE_PATH"
      mkdir -p "$NODE_BIN"
      echo "Now using node $2"
    ;;
    "listlibs" )
      ls $NODE_PATH | grep -v wafadmin
    ;;
    "list" )
      if [ $# -ne 1 ]; then
        nvm help
        return;
      fi
      if [ -d $NVM_DIR/HEAD ]; then
        if [[ $PATH == *$NVM_DIR/HEAD/bin* ]]; then
          echo "HEAD *"
        else
          echo "HEAD"
        fi
      fi
      for f in $NVM_DIR/v*; do
        if [[ $PATH == *$f/bin* ]]; then
          echo "v${f##*v} *"
        else
          echo "v${f##*v}"
        fi
      done
    ;;
    * )
      nvm help
    ;;
  esac
}