如何在上运行pry

Question

我使用Debian在Raspberry Pi上安装了rvm和Ruby1.9.3p194。当我使用gem install pry安装pry时，所有的东西都安装得很完美，但是在终端中输入pry却不起作用：

pi@raspberrypi ~ $ pry
bash: pry: command not found

在~/.rvm/gems/ruby-1.9.3-p194/bin中有一个窥探文件。我必须在同一个目录中用ruby_noexec_wrapper调用它：

pi@raspberrypi ~ $ .rvm/gems/ruby-1.9.3-p194/bin/pry
/usr/bin/env: ruby_noexec_wrapper: No such file or directory
pi@raspberrypi ~ $ cd .rvm/gems/ruby-1.9.3-p194/bin
pi@raspberrypi ~/.rvm/gems/ruby-1.9.3-p194/bin $ ./ruby_noexec_wrapper pry
[1] pry(main)>

在这个Linux中运行间谍的正确方法是什么？在Windows和Mac上，我可以在任何命令提示符或终端上输入pry。

更新：这是我的rvm info

pi@raspberrypi ~/.rvm/gems/ruby-1.9.3-p194/bin $ rvm info

ruby-1.9.3-p194:

  system:
    uname:       "Linux raspberrypi 3.1.9+ #168 PREEMPT Sat Jul 14 18:56:31 BST 2012 armv6l GNU/Linux"
    bash:        "/bin/bash => GNU bash, version 4.2.20(1)-release (arm-unknown-linux-gnueabihf)"
    zsh:         " => not installed"

  rvm:
    version:      "rvm 1.14.10 (stable) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]"
    updated:      "1 day 23 hours 36 minutes 30 seconds ago"

  ruby:
    interpreter:  "ruby"
    version:      "1.9.3p194"
    date:         "2012-04-20"
    platform:     "armv6l-linux-eabi"
    patchlevel:   "2012-04-20 revision 35410"
    full_version: "ruby 1.9.3p194 (2012-04-20 revision 35410) [armv6l-linux-eabi]"

  homes:
    gem:          "/home/pi/.rvm/gems/ruby-1.9.3-p194"
    ruby:         "/home/pi/.rvm/rubies/ruby-1.9.3-p194"

  binaries:
    ruby:         "/home/pi/.rvm/rubies/ruby-1.9.3-p194/bin/ruby"
    irb:          "/home/pi/.rvm/rubies/ruby-1.9.3-p194/bin/irb"
    gem:          "/home/pi/.rvm/rubies/ruby-1.9.3-p194/bin/gem"
    rake:         "/home/pi/.rvm/gems/ruby-1.9.3-p194@global/bin/rake"

  environment:
    PATH:         "/home/pi/.rvm/gems/ruby-1.9.3-p194/bin:/home/pi/.rvm/gems/ruby-1.9.3-p194@global/bin:/home/pi/.rvm/rubies/ruby-1.9.3-p194/bin:/home/pi/.rvm/bin:/usr/lib/arm-linux-gnueabihf/libfm:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"
    GEM_HOME:     "/home/pi/.rvm/gems/ruby-1.9.3-p194"
    GEM_PATH:     "/home/pi/.rvm/gems/ruby-1.9.3-p194:/home/pi/.rvm/gems/ruby-1.9.3-p194@global"
    MY_RUBY_HOME: "/home/pi/.rvm/rubies/ruby-1.9.3-p194"
    IRBRC:        "/home/pi/.rvm/rubies/ruby-1.9.3-p194/.irbrc"
    RUBYOPT:      ""
    gemset:       ""

Answer 1

首先，确保正确加载了rvm：

type rvm | head -n 1 # should be: rvm is a function
type gem | head -n 1 # should be: gem is a function

如果它们不是函数--这意味着RVM没有正确加载，这可能是shell中的一个bug (比如有限的bash)，您可以尝试用以下方法修复它：

rvm get head --auto

可能需要在此命令之后重新登录以运行所有shell配置文件。

接下来，确保使用rvm：

rvm use 1.9.3
echo $PATH
echo $GEM_PATH # those two need match those from `rvm info`
rvm info

您还可以将一个红宝石设置为默认值：

rvm use 1.9.3 --default

终端中的刷新路径类型

hash -r # OR:
PATH="$PATH"

甚至重新登录也会有帮助。