lua相关库安装常见问题

一、先安装lua

brew install lua

我本机的安装路径为：/usr/local/Cellar/lua/5.3.4_2

二、安装luarocks

下载luarocks的安装包：

http://luarocks.github.io/luarocks/releases/luarocks-2.4.3.tar.gz

解压后到安装包的目录下执行如下命令（可以自行根据自己的lua版本号进行修改）：

./configure --with-lua=/usr/local/Cellar/lua/5.3.4_2   --with-lua-include=/usr/local/Cellar/lua/5.3.4_2/include

make 

make install

安装完成

参考链接：http://www.shixinke.com/openresty/openresty-lua-luarocks

三、安装lfs

sudo luarocks install luafilesystem

可能会有报错，but，anyway，安装成功了不是么

lfs的使用：

进入到lua的命令行，require "lfs"

大功告成，可以正常使用了 

引用链接：https://luarocks.org/

四、安装luasocket和luasql

1、首先安装luasocket

sudo luarocks install luasocket

2、安装luasql

我遇到了下面的问题

Warning: The directory '/Users/baidu/.cache/luarocks' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing /usr/local/bin/luarocks with sudo, you may want sudo's -H flag.
Warning: falling back to curl - install luasec to get native HTTPS support
Installing https://luarocks.org/luasql-mysql-2.3.5-1.rockspec

Error: Could not find header file for MYSQL
  No file mysql.h in /usr/local/include
  No file mysql.h in /usr/include
You may have to install MYSQL in your system and/or pass MYSQL_DIR or MYSQL_INCDIR to the luarocks command.
Example: luarocks install luasql-mysql MYSQL_DIR=/usr/local

看错误提示，是没有找到mysql的头文件，需要先安装一下mysql：

mac执行下面brew install mysql命令即可安装。根据终端的打印结果，发现mysql的安装目录为/usr/local/Cellar/mysql/5.7.21。

那继续找上面的问题：

上面的报错提示可以用下面的命令进行安装：luarocks install luasql-mysql MYSQL_DIR=/usr/local

不过我们的MYSQL_DIR是目录：/usr/local/Cellar/mysql/5.7.21

所以我们改一下报错提示中的安装命令：

sudo luarocks install luasql-mysql MYSQL_INCDIR=/usr/local/Cellar/mysql/5.7.21/include/mysql

好了，出现下面的日志，安装成功了：