Ruby on rails ruby致命：不是git存储库吗？

我正在尝试从这里运行脚本：

你可以试着跟踪自己和测试结果

我完全遵循了它，但当我打开程序时，我得到了这个，我不知道如何修复它？任何帮助都是巨大的帮助。我在这个文件夹中运行了git init:c:\Ruby200-x64\devkit我认为这是正确的文件夹？我怎么知道在哪里运行它

我已经尝试按照google的错误运行git init，但它没有帮助，仍然返回相同的错误。也安装了gem安装minitest。运行64位ruby和devkit

c:\Ruby200-x64\devkit>gem install rbtc_arbitrage_simple
Successfully installed rbtc_arbitrage_simple-2.1.1
Parsing documentation for rbtc_arbitrage_simple-2.1.1
1 gem installed

c:\Ruby200-x64\devkit>rbtc_simple
fatal: Not a git repository (or any of the parent directories): .git
fatal: Not a git repository (or any of the parent directories): .git
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/spec_set.rb:92
:in `block in materialize': Could not find minitest-4.7.5 in any of the sources
(Bundler::GemNotFound)
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/s
pec_set.rb:85:in `map!'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/s
pec_set.rb:85:in `materialize'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/d
efinition.rb:133:in `specs'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/d
efinition.rb:178:in `specs_for'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/r
untime.rb:13:in `setup'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler.r
b:127:in `setup'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler.r
b:132:in `require'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc_arbitrage_simple-2.1.1
/lib/rbtc_arbitrage.rb:3:in `block in <top (required)>'
        from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc_arbitrage_simple-2.1.1
/lib/rbtc_arbitrage.rb:2:in `chdir'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc_arbitrage_simple-2.1.1
/lib/rbtc_arbitrage.rb:2:in `<top (required)>'
       from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:5
5:in `require'
        from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:5
5:in `require'
       from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc_arbitrage_simple-2.1.1
/bin/rbtc_simple:4:in `<top (required)>'
       from C:/Ruby200-x64/bin/rbtc_simple:23:in `load'
        from C:/Ruby200-x64/bin/rbtc_simple:23:in `<main>'

c:\Ruby200-x64\devkit>gem安装rbtc\u套利\u简单
已成功安装rbtc_套利_simple-2.1.1
rbtc_套利分析文档\u simple-2.1.1
已安装1个gem
c:\Ruby200-x64\devkit>rbtc\u简单
致命：不是git存储库（或任何父目录）：.git
致命：不是git存储库（或任何父目录）：.git
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/spec_set.rb:92
：在“物化中的块”中：在任何源中找不到minitest-4.7.5
（绑定器：：GemNotFound）
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/s
pec_set.rb:85:in'map！'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/s
pec_set.rb:85:in'materialize'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/d
定义.rb:133:in'specs'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/d
定义.rb:178:in'specs_for'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler/r
untime.rb:13:in'setup'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler.r
b:127:在“设置”中
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.6.3/lib/bundler.r
b:132:在'require'中
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc\u套利\u simple-2.1.1
/lib/rbtc_套利。rb:3:in'block in'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc\u套利\u simple-2.1.1
/lib/rbtc_套利。rb:2:in`chdir'
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc\u套利\u simple-2.1.1
/lib/rbtc_套利。rb:2:in`'
来自C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core\u ext/kernel\u require.rb:5
5:在'require'中
来自C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core\u ext/kernel\u require.rb:5
5:在'require'中
来自C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rbtc\u套利\u simple-2.1.1
/bin/rbtc_简单：4:in`'
从C:/Ruby200-x64/bin/rbtc_simple:23:in'load'
从C:/Ruby200-x64/bin/rbtc_简单：23:in`'