cpanm安装及Perl模块安装教程

cpanm是安装Perl模块的最方便的方法。自动下载安装依赖包。使用CPAN shell或下载源码包安装模块，遇到大量依赖关系，非常头痛。下面就是一例：

安装MongoDB模块

代码如下:
# perl Makefile.PL
Warning: prerequisite Class::Method::Modifiers 0 not found.
Warning: prerequisite Data::Types 0 not found.
Warning: prerequisite DateTime 0 not found.
Warning: prerequisite DateTime::Tiny 0 not found.
Warning: prerequisite ExtUtils::MakeMaker 6.59 not found. We have 6.30.
Warning: prerequisite File::Slurp 0 not found.
Warning: prerequisite File::Temp 0.17 not found. We have 0.16.
Warning: prerequisite JSON 0 not found.
Warning: prerequisite Moose 0 not found.
Warning: prerequisite Test::Exception 0 not found.
Warning: prerequisite Test::Warn 0 not found.
Warning: prerequisite Tie::IxHash 0 not found.
Warning: prerequisite Try::Tiny 0 not found.
Warning: prerequisite boolean 0 not found.
Writing Makefile for MongoDB

1. 安装cpanm

cpanm其实是一个可执行文件而已。将它下载到bin目录，然后添加执行权限就可以了。

代码如下:
# wget http:
//xrl.us/cpanm -O /usr/bin/cpanm; chmod +x /usr/bin/cpanm

2. 使用cpanm安装模块

代码如下:
# cpanm -h
  -v,--verbose              Turns on chatty output
  -q,--quiet                Turns off the most output
  --interactive             开启交互配置(required for Task:: modules)
  -f,--force                强制安装
  -n,--notest               Do not run unit tests
  --test-only               只测试不安装
  -S,--sudo                 sudo to run install commands
  --installdeps             只安装依赖模块
  --showdeps                只显示依赖信息
  --reinstall               重新安装
  --mirror                  指定镜像url (e.g. http://cpan.cpantesters.org/)
  --mirror-only             只从镜像下载
  --prompt                  Prompt when configure/build/test fails