RVM Install

rvm：Ruby Version Manager，是ruby的版本管理器，包括ruby的版本管理和gem库管理(gemset)，它允许多个ruby版本存在。
rvm安装

1
curl -L https://get.rvm.io | bash -s stable

安装完需要载入rvm环境

1
source ~/.rvm/scripts/rvm

Ruby Install

rvm安装ruby一条指令就可以了rvm install [rubyversion]，安装前看看目前ruby有哪些版本可以安装：

1
2
3
4
5
6
7
8
9
10
11
12
13
Huug$ rvm list known
# MRI Rubies
[ruby-]1.8.6[-p420]
[ruby-]1.8.7[-head] # security released on head
[ruby-]1.9.1[-p431]
[ruby-]1.9.2[-p330]
[ruby-]1.9.3[-p551]
[ruby-]2.0.0[-p648]
[ruby-]2.1[.8]
[ruby-]2.2[.4]
[ruby-]2.3[.0]
[ruby-]2.2-head
ruby-head

选择安装2.3版本

1
rvm install 2.3.0

用rvm安装ruby等待漫长时间后返回

1
2
... ...
requirements installation failed with status ：1.

以下是fail的详细信息。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.10/x86_64/ruby-2.3.0.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Installing requirements for osx.
Updating system.......
Error running 'requirements_osx_brew_update_system ruby-2.3.0',
showing last 15 lines of /Users/hanhuanming/.rvm/log/1472866957_ruby-2.3.0/update_system.log
    https://github.com/Homebrew/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.'
++ rvm_pretty_print stderr
++ case "${rvm_pretty_print_flag:=auto}" in
++ case "${TERM:-dumb}" in
++ case "$1" in
++ [[ -t 2 ]]
++ return 1
++ printf %b 'Failed to update Homebrew, follow instructions here:
    https://github.com/Homebrew/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.\n'
Failed to update Homebrew, follow instructions here:
    https://github.com/Homebrew/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.
++ return 1
Requirements installation failed with status: 1.

从fail信息中看到Failed to update Homebrew，单独敲了brew update发现等待许久后仍无任何反应，google了一下在stackoverflow上有人解释rvm安装Homebrew可能存在问题，需要重新安装Homebrew。
安装Homebrew指令如下：

1
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

输入该指令后，提示已经存在Homebrew，安装失败。

1
2
-e:81: warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
It appears Homebrew is already installed.

根据提示，卸载Homebrew

1
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"

成功卸载后再用刚才的指令安装Homebrew,出现以下输出表示安装成功。

1
==> Installation successful!

重新安装Homebrew后，单独执行rvm requirements来检查和安装所需运行环境，发现可以正常check和install所需的依赖环境。

1
2
3
4
5
6
7
8
9
Checking requirements for osx.
Installing requirements for osx.
Updating system.....
Installing required custom packages: homebrew/versions     
.
Installing required packages: autoconf, automake, libtool, pkg-config, gcc49, libyaml, readline, libksba, openssl...............
...
...
Requirements installation successful.

安装完依赖环境后,安装ruby

1
rvm install 2.3.0

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13.5M  100 13.5M    0     0  10294      0  0:22:58  0:22:58 --:--:--  9241
ruby-2.3.0 - #extracting ruby-2.3.0 to /Users/huug/.rvm/src/ruby-2.3.0..-
ruby-2.3.0 - #configuring......................................................|
ruby-2.3.0 - #post-configuration.
ruby-2.3.0 - #compiling........................................................|
ruby-2.3.0 - #installing.........
ruby-2.3.0 - #making binaries executable..
Installed rubygems 2.5.1 is newer than 2.4.8 provided with installed ruby, skipping installation, use --force to force installation.
ruby-2.3.0 - #gemset created /Users/huug/.rvm/gems/ruby-2.3.0@global
ruby-2.3.0 - #importing gemset /Users/huug/.rvm/gemsets/global.gems......
ruby-2.3.0 - #generating global wrappers........
ruby-2.3.0 - #gemset created /Users/huug/.rvm/gems/ruby-2.3.0
ruby-2.3.0 - #importing gemsetfile /Users/huug/.rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.3.0 - #generating default wrappers........
ruby-2.3.0 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.3.0 - #complete

在经过一段时间后，终于安装成功。验证下是否安装成功，可以通过ruby －v来查看版本是否安装版本：

1
2
huug$ ruby -v
ruby 2.0.0p481 (2014-05-08 revision 45883) [universal.x86_64-darwin14]

貌似还是系统默认的版本，通过rvm use 2.3.0 --default选择默认版本为2.3.0。

1
2
3
4
hugg$ rvm use 2.3.0 --default
Using /Users/huug/.rvm/gems/ruby-2.3.0
huug$ ruby -v
ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin14]

到这里ruby就安装好了，接下来安装rails。

Rails Install

先来了解下gem，gem是一个管理Ruby库和程序的标准包，而用来管理项目的gem的，叫bundler。

1
2
huug$ gem -v
2.5.1

由于你懂的原因，需要换一下gem源：

1
2
3
hugg$ gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/
https://gems.ruby-china.org/ added to sources
https://rubygems.org/ removed from sources

还需要安装bundler：

1
2
3
4
5
6
7
huug$ gem install bundler
Fetching: bundler-1.12.5.gem (100%)
Successfully installed bundler-1.12.5
Parsing documentation for bundler-1.12.5
Installing ri documentation for bundler-1.12.5
Done installing documentation for bundler after 3 seconds
1 gem installed

现在可以正式安装rails了：

1
gem install rails

再输出一屏幕的Fetching和Successfully后，rails安装完毕，来看一下rails版本：

1
2
huug$ rails -v
Rails 5.0.0.1

接下来就动手欣赏ruby on rails之美吧。

更多Ruby on Rails信息可参见Ruby China