Homebrew：忽略 bigdecimal-1.3.2，因为它的扩展未构建答案

【问题标题】：Homebrew: Ignoring bigdecimal-1.3.2 because its extensions are not builtHomebrew：忽略 bigdecimal-1.3.2，因为它的扩展未构建
【发布时间】：2018-10-19 14:07:36
【问题描述】：

当我运行brew update 时，总是会出现Ignoring bigdecimal-1.3.2 because its extensions are not built. Try: gem pristine bigdecimal --version 1.3.2 警告：

> brew update
Ignoring bigdecimal-1.3.2 because its extensions are not built.  Try: gem pristine bigdecimal --version 1.3.2
Ignoring bigdecimal-1.3.2 because its extensions are not built.  Try: gem pristine bigdecimal --version 1.3.2
Already up-to-date.

我正在使用 Homebrew v1.7.7 (Homebrew/homebrew-core (git revision 77cae; last commit 2018-10-19), Homebrew/homebrew-cask (git revision c95843; last commit 2018-10-19))和 rbenv v1.1.1。

我已经做了gem pristine bigdecimal --version 1.3.2，上面写着：

> gem pristine bigdecimal --version 1.3.2
ERROR:  While executing gem ... (Gem::Exception)
    Failed to find gems ["bigdecimal"] = 1.3.2

即使gem pristine --all 也没有修复它。

gem environment 向我展示了 2 条宝石路径。可以吗？

> gem environment
RubyGems Environment:
  - RUBYGEMS VERSION: 2.6.11
  - RUBY VERSION: 2.4.1 (2017-03-22 patchlevel 111) [x86_64-darwin16]
  - INSTALLATION DIRECTORY: /Users/ricardo/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0
  - USER INSTALLATION DIRECTORY: /Users/ricardo/.gem/ruby/2.4.0
  - RUBY EXECUTABLE: /Users/ricardo/.rbenv/versions/2.4.1/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/ricardo/.rbenv/versions/2.4.1/bin
  - SPEC CACHE DIRECTORY: /Users/ricardo/.gem/specs
  - SYSTEM CONFIGURATION DIRECTORY: /Users/ricardo/.rbenv/versions/2.4.1/etc
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-16
  - GEM PATHS:
     - /Users/ricardo/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0
     - /Users/ricardo/.gem/ruby/2.4.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - "gem" => "--no-rdoc --no-ri --user-install"
  - REMOTE SOURCES:
     - https://rubygems.org/
  - SHELL PATH:
     - /Users/ricardo/.rbenv/versions/2.4.1/bin
     - /usr/local/Cellar/rbenv/1.1.1/libexec
     - /Users/ricardo/.gem/ruby/2.4.0/bin
     - /Users/ricardo/.rbenv/shims
     - /usr/local/bin
     - /usr/bin
     - /bin
     - /usr/sbin
     - /sbin

【问题讨论】：

你试过先卸载吗？
@Casper 是的，我尝试卸载 gem。 gem uninstall bigdecimal --version 1.3.2: "错误：执行 gem 时 ... (Gem::InstallError) gem "bigdecimal" 没有安装"
用gem uninstall bigdecimal --all --force怎么样？
你也可以试试locate bigdecimal-1.3.4看看安装在哪里。然后将文件夹和/或 gemspec 移到其他地方进行备份，然后重新安装。
我运行了gem uninstall bigdecimal --all --force，它成功卸载了bigdecimal-1.3.5，但问题依然存在。

标签： ruby homebrew rbenv

【解决方案1】：

确保您使用的是正确的gem。以下为我修复了它：

$ which ruby
/usr/local/bin/ruby
$ /usr/bin/gem uninstall bigdecimal --all --force

（编辑：将“删除”固定为“卸载”）

【讨论】：

不适合我。它说：“错误：执行 gem 时 ... (Gem::CommandLineError) Unknown command remove”