雰囲気で shell で書いた何か

1.sh

#!/bin/bash

. ../functions/base.subr

install_once nginx
# install_once nginx_config
# install_once rbenv
# ...

base.subr

_file=${BASH_SOURCE:-$0}
_basedir=$(dirname $_file)

green()
{
  echo "\033[32m$1\033[0m"
}

red()
{
  echo "\033[31m$1\033[0m"
}

yellow()
{
  echo "\033[33m$1\033[0m"
}

echoskip()
{
  green "[SKIP] $1"
}

install_once()
{
  local name=$1
  shift

  . ${_basedir}/$name.subr

  checkinstalled_$name "$@"
  case $? in
    0 )
      green "===> [SKIP] $name already installed"
      ;;
    127 )
      red "===> checkinstalled_$name is not defined."
      ;;
    * )
      yellow "===> [INSTALL] $name"
      install_$name "$@"
      ;;
  esac
}

atexit()
{
  _atexit_list="${_atexit_list} $1"
}

_atexit()
{
  for i in ${_atexit_list}; do
    $i
  done
}

trap _atexit EXIT

nginx.subr

checkinstalled_nginx()
{
  nginx -v 2>&1 | grep nginx/${required_nginx_version} >/dev/null
}

install_nginx()
{
  cat <<EOF > /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/mainline/centos/7/\$basearch/
gpgcheck=0
enabled=1
EOF

  yum install nginx -y
  systemctl enable nginx
}