Nitrogen 安装

在CentOS下，源码安装Erlang：

下载Erlang源码

安装：官网地址，http://www.erlang.org

# cd /opt/
# wget http://www.erlang.org/download/otp_src_R15B02.tar.gz
# cd /opt/
# wget http://www.erlang.org/download/otp_src_R15B02.tar.gz


解压：
# tar -zxvf otp_src_R15B02.tar.gz
# cd otp_src_R15B02
# tar -zxvf otp_src_R15B02.tar.gz
# cd otp_src_R15B02


安装依赖：
# yum install build-essential m4
# yum install openssl
# yum install openssl-devel
# yum install unixODBC
# yum install unixODBC-devel
# yum -y install make gcc gcc-c++ kernel-devel m4 ncurses-devel openssl-devel
# yum install build-essential m4
# yum install openssl
# yum install openssl-devel
# yum install unixODBC
# yum install unixODBC-devel
# yum -y install make gcc gcc-c++ kernel-devel m4 ncurses-devel openssl-devel


配置configure 
# ./configure --prefix=/usr/local/erlang --enable-hipe --enable-threads --enable-smp-support --enable-kernel-poll

make

make install
# ./configure --prefix=/usr/local/erlang --enable-hipe --enable-threads --enable-smp-support --enable-kernel-poll

make

make install


完成之后，设置环境变量

vim /etc/profile

ERL_HOME=/usr/local/erlang
PATH=$ERL_HOME/bin:$PATH
export ERL_HOME PATH
vim /etc/profile 

ERL_HOME=/usr/local/erlang
PATH=$ERL_HOME/bin:$PATH
export ERL_HOME PATH


完成后保存

source /etc/profile
source /etc/profile 


让环境变量立即生效

然后输入erl，出现erlang shell，如下：
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.9.1  (abort with ^G)
1>
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V5.9.1  (abort with ^G)
1>



hipe：支持Erlang编译成本地代码。好处：提高Erlang虚拟机执行代码性能。

参考文献：
[1] http://jinghong.iteye.com/blog/1075165
[2] http://my.oschina.net/hanyu363/blog/29727
[3] http://www.linuxidc.com/Linux/2011-07/39156.htm  

重启centos

yum install git

mkdir erl_lib

cd erl_lib

git clone git://github.com/nitrogen/nitrogen.git

cd nitrogen

修改deps 目录中的源码，重新生成rel目录才会生效

make rel_inets  //编译生成rel目录

进入rel目录  cd rel/nitrogen

./bin/nitrogen console  启动服务器

open http://localhost:8000

访问页面http://localhost:8000成功

修改     nitrogen/deps/nitrogen_core/src/elements/other/element_google_chat.erl

在 Type = [  中加入

          overlapped_vertical_bar ->  "bvo";
            overlapped_horizontal_bar -> "bho";

两个chart type 类别 

在  BarSize = case MaxValueLength of  中加入

   overlapped_horizontal_bar -> Record#google_chart.height;
                overlapped_vertical_bar -> Record#google_chart.width;

两个新的条件控制其最大值

 运行状态下：
sync:go()  实时编译命令
bin/dev compile 重编译命令
关闭状态下：
 make compile  重编译