php代码上线，实现版本切换

以下为现有php业务，代码上线方式。实现：4套环境版本切换。

[root@hz-web-01 htdocs]# cat release.sh
#!/usr/bin/env bash

work_dir=/mnt/var/www/htdocs
release_dir=/var/www/htdocs

# app environment
app_env=$1
# build release file path
build_file_path=$2

help() {
echo
echo usage: ${0##*/} [app_env] [build_file_path]
echo example: ${0##*/} int lvanclub_int_build_20150731_170557.tar.gz
echo
exit 0
}

# check the app_env variable value
case ${app_env} in
dev)
echo "ECHO: don't support dev environment present"
help
exit 1
;;
int)
user=apache
group=apache
;;
sandbox)
user=apache
group=apache
;;
live)
user=php-fpm
group=php-fpm
;;
*)
echo "ERROR: invalid app_env value, should be dev, int, sandbox orlive!"
help
exit 1
;;
esac

# check the build_file_path variable value
if [ -z ${build_file_path} ]
then
echo "ERROR: please specify the build file path"
help
exit 1
elif [ ! -f ${build_file_path} ]
then
echo "ERROR: specified build file '${build_file_path}' is notfound"
help
exit 1
fi

# reference: linux shell 字符串操作（长度，查找，替换）详解 - http://www.cnblogs.com/chengmo/archive/2010/10/02/1841355.html # only keep the build folder name
build_file_name=${build_file_path##*/}
build_name=${build_file_name%.tar.gz}
# if current build folder exists, justremove it
rm ${work_dir}/${build_name} -rvf
tar xzvf ${build_file_path}--directory=${work_dir}/

# make soft link for cpserver project
cd ${work_dir}/${build_name}/sdkserver/web
ln -s ../../cpserver cpserver

# copy log files
cd ${work_dir}
# appstore
cp${release_dir}/${app_env}/appstore/apps/api/var/logs ${work_dir}/${build_name}/appstore/apps/api/var/-rvf
# appstore dashboard
cp${release_dir}/${app_env}/appstore/apps/dashboard/var/logs${work_dir}/${build_name}/appstore/apps/dashboard/var/ -rvf
# sdkserver
cp${release_dir}/${app_env}/sdkserver/protected/logs${work_dir}/${build_name}/sdkserver/protected/ -rvf
cp${release_dir}/${app_env}/sdkserver/protected/runtime${work_dir}/${build_name}/sdkserver/protected/ -rvf
# cpserver
cp ${release_dir}/${app_env}/cpserver/logs${work_dir}/${build_name}/cpserver/ -rvf

# change file owners and permissions
chown ${user}:${group}${work_dir}/${build_name} -R
chmod 775 ${work_dir}/${build_name} -R

# make build as current release
rm ${release_dir}/${app_env} -vf
ln -s ${work_dir}/${build_name}${release_dir}/${app_env}

# restart php-fpm service
service php-fpm restart

以上脚本内容较少，没有注释。下面进行解读
采用这种方式的原因：阿里云平台，挂载磁盘被分配在/mnt目录下

实际目录：/mnt/var/www/htdocs
软连接目录：/var/www/htdocs
正如help所说 dev 环境 int环境 sandbox环境 live环境 四套环境的版本切换。live环境为线上正式环境。

我已将思路共享，希望大家能给出改良方案！

#2015-08-26 以下为每次代码上线的实施文档
#此文档为暂时文档，后期部署jenkins 更换
#1 检查tar.gz文件里面一级菜单内容
#2 回滚操作：
# 根据第三步，选择近期升级版本。

第一步：
把要升级的软件包，传送至服务器：hz-bf-01
代码存放位置：/mnt/word
第二布：
分发软件包到相应的服务器
sh /mnt/shell/fenfa.sh /mnt/word/lvanclub_live_build_20150826_111450.tar.gz /mnt/var/www/htdocs
第三步：
执行ansiable:
ansible -i ./hosts web -m command -a "sh /mnt/var/www/htdocs/release.sh live /mnt/var/www/htdocs/lvanclub_live_build_20150827_153156.tar.gz"