[linux] shell脚本编程-xunsearch安装脚本学习

#!/bin/sh
# FULL fast install/upgrade script
# See help message via `--help'
# $Id$

# self check
if ! test -d ./packages ; then
  echo "ERROR: you should run the script under its directory"
  echo "错误：您只能在脚本所在目录运行它"
  exit -1
fi

# get default prefix
if test -f $HOME/.xs_installed ; then
  def_prefix=`cat $HOME/.xs_installed`
elif test "$HOME" = "/" || test "$HOME" = "/root" ; then
  def_prefix=/usr/local/xunsearch
else
  def_prefix=$HOME/xunsearch
fi

i=0
while [ $i -lt $# ] ; do
  i=`expr $i + 1`
  eval arg=\$$i
  opt=`echo $arg | cut -d= -f1`
  val=`echo $arg | cut -d= -f2`
  case $opt in
        "--prefix")
          set_prefix="$val"
        ;;
        "--no-clean")
          set_no_clean=yes
        ;;
        # just for back compatibility
        "--clean")
          do_clean
          exit
        ;;
        "--force")
          if test "$val" != "no" ; then
        set_force=yes
      fi
        ;;
        "--enable-debug"|"--enable-memory-cache")
          xs_add_option="$xs_add_option $arg"
        ;;
        "--jobs")
          mk_add_option="$mk_add_option -j$val"
        ;;
        "--help")
      show_usage
      exit
        ;;
        *)
          echo "ERROR: unknown option '$arg'" >&2
          echo "" >&2
          show_usage
          exit -1
        ;;
  esac
done