嘿我用bundler和一些宝石玩了，现在我再也不能使用rake
如果我做一个简单的db：migrate我得到这个错误：
mac:app antpaw$ rake db:migrate
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:335:in `bin_path': can't find executable rake for rake-0.8.7 (Gem::Exception)
from <internal:gem_prelude>:282:in `method_missing'
from /usr/local/bin/rake:19:in `<main>'
但如果我gem list，则会列出佣金。我使用rails 3.0.0beta4，bundler 1.0.0.beta.5和ruby 1.9.2dev。
EDIT发布了我的export
mac:trickpipe antpaw$ export
declare -x Apple_PubSub_Socket_Render="/tmp/launch-2GMaKT/Render"
declare -x COMMAND_MODE="unix2003"
declare -x DISPLAY="/tmp/launch-5RguhF/:0"
declare -x HOME="/Users/antpaw"
declare -x LC_CTYPE="UTF-8"
declare -x LOGNAME="antpaw"
declare -x OLDPWD="/Users/antpaw"
declare -x PATH="/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/usr/X11/bin"
declare -x PWD="/Volumes/Work HD/localhost/trickpipe"
declare -x SHELL="/bin/bash"
declare -x SHLVL="1"
declare -x SSH_AUTH_SOCK="/tmp/launch-N13Ivn/Listeners"
declare -x TERM="xterm-color"
declare -x TERM_PROGRAM="Apple_Terminal"
declare -x TERM_PROGRAM_VERSION="272"
declare -x TMPDIR="/var/folders/-K/-Kf7svFPHrKmLqMXKAGLuU+++TI/-Tmp-/"
declare -x USER="antpaw"
declare -x __CF_USER_TEXT_ENCODING="0x1F5:0:0"
mac:trickpipe antpaw$ which ruby
/usr/local/bin/ruby
mac:trickpipe antpaw$ ruby -v
ruby 1.9.2dev (2010-07-02 revision 28524) [x86_64-darwin10.2.0]
好的我试了一下，看看错误消息如何改变：
mac:trickpipe antpaw$ export GEM_HOME="/usr/local/lib/ruby/gems"
mac:trickpipe antpaw$ rake about
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:335:in `bin_path': can't find executable rake for rake-0.8.7 (Gem::Exception)
from <internal:gem_prelude>:282:in `method_missing'
from /usr/local/bin/rake:19:in `<main>'
mac:trickpipe antpaw$ export GEM_PATH="/usr/local/lib/ruby/gems"
mac:trickpipe antpaw$ rake about
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:779:in `report_activate_error': Could not find RubyGem rake (>= 0) (Gem::LoadError)
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:214:in `activate'
from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1082:in `gem'
from <internal:gem_prelude>:213:in `push_gem_version_on_load_path'
from <internal:gem_prelude>:16:in `gem'
from /usr/local/bin/rake:18:in `<main>'
mac:trickpipe antpaw$
现在使用rvm：
mac:trickpipe antpaw$ rake about
(in /Volumes/Work HD/localhost/rails_app)
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:30: warning: already initialized constant RAKEVERSION
WARNING: Possible conflict with Rake extension: String#ext already exists
WARNING: Possible conflict with Rake extension: String#pathmap already exists
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:402: warning: already initialized constant EMPTY_TASK_ARGS
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:450: warning: already initialized constant EMPTY
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:958: warning: already initialized constant RUBY_EXT
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:962: warning: already initialized constant RUBY
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1031: warning: already initialized constant LN_SUPPORTED
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1240: warning: already initialized constant ARRAY_METHODS
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1243: warning: already initialized constant MUST_DEFINE
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1247: warning: already initialized constant MUST_NOT_DEFINE
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1251: warning: already initialized constant SPECIAL_RETURN
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1257: warning: already initialized constant DELEGATING_METHODS
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1561: warning: already initialized constant DEFAULT_IGNORE_PATTERNS
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1567: warning: already initialized constant DEFAULT_IGNORE_PROCS
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1604: warning: already initialized constant FileList
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1630: warning: already initialized constant EARLY
/Users/antpaw/.rvm/rubies/ruby-1.9.2-rc2/lib/ruby/1.9.1/rake.rb:1960: warning: already initialized constant DEFAULT_RAKEFILES
DEPRECATION WARNING: Calling a method in Rails::Application is deprecated, please call it directly in your application constant Trickpipe::Application. (called from method_missing at /Users/antpaw/.rvm/gems/ruby-1.9.2-rc2/bundler/gems/rails-edb5401/railties/lib/rails/application.rb:77)
rake aborted!
stack level too deep
(See full trace by running task with --trace)
答案 0 :(得分：12)
如果您使用macports安装ruby 1.9.2只是一个FYI我有一个像这样的问题：
/opt/local/lib/ruby1.9/1.9.1/rubygems.rb:340:in `bin_path': can't find executable rake for rake-0.8.7 (Gem::Exception)
from /opt/local/bin/rake:19:in `<main>'
修复是进入/opt/local/lib/ruby1.9/gems/1.9.1/specifications并删除“rake.gemspec”
就是这样......花了很长时间才找到它，但它运作良好
答案 1 :(得分：6)
我很确定您没有正确设置路径环境。
/usr/local/lib/ruby/site_ruby/1.9.1/是Mac OS X附带的RUby解释器的默认包文件夹 - 废话。当你说你（假设）使用Ruby 1.9.2dev这条路径是错误的。请在shell中删除export并发布结果。另外，请发布你的Ruby 1.9.2dev和你的捆绑文件夹的install- / pathes。
好的，针对您的问题的quickfix：export GEM_HOME="/path/where/your/gems/reside"以及可选的export GEM_PATH="/path/where/your/gems/reside"和可选的export PATH="/path/where/your/gems/reside:$PATH"。只有这个顺序！尝试一个，当它仍然无法继续下一次导出时。
请注意，这应解决您的问题，但要使Bundler环境与rails f.e一起使用。您必须更改Rails应用程序的配置以明确使用您的自定义BUndler gem环境。我前段时间读到Rails3将包含选项;在这种情况下（我不知道Rails3）检查你的那些命令。
P.s：将Bundler放在一边，改为使用RVM。它更强大，更成熟，并且允许更大的灵活性（特别是在与gemsets一起处理多个解释器时）。
答案 2 :(得分：2)
我在RVM ("warning: already initialized constant RAKEVERSION")等问题上遇到了同样的问题。
我正在使用Gemset（“rails”）来做我的开发，但我注意到我的BUNDLE_PATH指向的不是这个gemset (.rvm/gems/ruby-1.9.2-p0@rails);而是指向全局的(.rvm/gems/ruby-1.9.2-p0). { {1}}
我修复了BUNDLE_PATH以使用rails Gemset，现在rake正常工作了。希望它有所帮助。
答案 3 :(得分：0)