source インストールしたnodeをnに入れ替えるスクリプト

replace_node2n.sh

#!/bin/bash
prefix=/usr/local
current_version=$(/usr/local/bin/node --version)

which rsync >/dev/null 2>&1 || yum install -y rsync

install_n () {
  if ! [ -x $prefix/bin/n ] ; then
    curl -L https://raw.githubusercontent.com/tj/n/master/bin/n -o $prefix/bin/n
    chmod a+x $prefix/bin/n
    mkdir -p $prefix/n
  fi
}

move_old_node () {
  mkdir -p $prefix/n/versions/node/$current_version/{bin,lib/node_modules,lib/dtrace,include,share/man/man1,share/doc,share/systemtap/tapset}
  while read target
  do
    if [ -e $prefix/${target} ] ; then
      echo rsync -a $prefix/${target} $prefix/n/versions/node/$current_version/${target}
      rsync -a $prefix/${target} $prefix/n/versions/node/$current_version/${target}
    fi
  done <<END
bin/node
bin/npm
bin/npx
include/node
lib/dtrace/node.d
lib/node_modules/npm
share/doc/node
share/man/man1/node.1
share/systemtap/tapset/node.stp
END
}

install_n
if ! [ -d /var/tmp/node_modules.backup.${current_version}.$(date +%Y%m%d) ] ; then
  rsync -av $prefix/lib/node_modules /var/tmp/node_modules.backup.${current_version}.$(date +%Y%m%d)
fi
move_old_node