Gem 安装错误：“请至少指定一个 gem 名称”

Question

例如，当我运行 'gem install bundler' 时，如果我运行的是 ruby​​ 版本 1.9.3，它可以正常工作，但是在运行 ruby​​ 2.1.2 时，它似乎没有看到 'bundler' arg 并给我

ERROR:  While executing gem ... (Gem::CommandLineError)
  Please specify at least one gem name (e.g. gem build GEMNAME)

我在运行 rbenv 的两个不同系统上看到了这一点。

以下是 RBENV_DEBUG=1 运行时输出的最后一部分：

+ [rbenv-exec:45] export PATH=/home/ded/.rbenv/versions/2.1.2/bin:/home/ded/.rbenv  /libexec:/home/ded/.rbenv/plugins/bundler/bin:/home/ded/.rbenv/plugins/ruby-build/bin:.bundle/bin:/home/ded/.rbenv/shims:/home/ded/.rbenv/bin:/home/ded/.cabal/bin:/home/ded/.emacs/ded/lisp/ecukes:/home/ded/local/node/bin:/home/ded/j64-701/bin:/home/ded/bin:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/plan9/bin
+ [rbenv-exec:45] PATH=/home/ded/.rbenv/versions/2.1.2/bin:/home/ded/.rbenv/libexec:/home/ded/.rbenv/plugins/bundler/bin:/home/ded/.rbenv/plugins/ruby-build/bin:.bundle/bin:/home/ded/.rbenv/shims:/home/ded/.rbenv/bin:/home/ded/.cabal/bin:/home/ded/.emacs/ded/lisp/ecukes:/home/ded/local/node/bin:/home/ded/j64-701/bin:/home/ded/bin:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/plan9/bin
+ [rbenv-exec:47] exec -a gem /home/ded/.rbenv/versions/2.1.2/bin/gem install bundler
  ERROR:  While executing gem ... (Gem::CommandLineError)
    Please specify at least one gem name (e.g. gem build GEMNAME)

有什么建议可能会出错吗？

Answer 1

改变了我的 ~/.gemrc 从

gem: --document

到

gem:  --ri-document

这解决了问题。不知道为什么它不是 ruby​​ 1.9.3 的问题。