gem：：尝试使用分叉gem时的LoadError

Question

我的目标是使用libmspack。这取决于ffi编译器，我已经对ffi编译器进行了分叉，以添加一些自定义代码，并且我希望libmspack使用我的修改版本。我有一个简单的Gemfile：

source 'http://rubygems.org'

gem 'ffi-compiler', :github =>'survili/ffi-compiler'
gem 'libmspack'

当运行'bundle install‘时，’ffi-编译器‘的安装完成得很好，但是'libmspack’安装失败了，它找不到‘ffi-编译器’。(LoadError:无法加载这样的文件-ffi-编译器/编译_任务)

我注意到，如果我从Gemfile中删除' libmspack‘，并尝试使用'bundle exec’安装它，它就可以正常工作。

有人能解释一下，实现我的目标的正确方法是什么，导致libmspack使用自定义ffi编译器创业板？

我找到了这样的帖子，问的也是一样的，但没有答案：Gem::LoadError when using a git repo in Gemfile

提前谢谢你

jackju at macbook-air  ~/tmp/delme1
$ rvm use 2.1.1@stackoverproblem --create
ruby-2.1.1 - #gemset created /home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem
ruby-2.1.1 - #generating stackoverproblem wrappers...........
Using /home/jackju/.rvm/gems/ruby-2.1.1 with gemset stackoverproblem
jackju at macbook-air  ~/tmp/delme1
$ rvm current
ruby-2.1.1@stackoverproblem
jackju at macbook-air  ~/tmp/delme1
$ vim Gemfile

[1]+  Stopped                 vim Gemfile
jackju at macbook-air  ~/tmp/delme1
$ rvm current
ruby-2.1.1@stackoverproblem
jackju at macbook-air  ~/tmp/delme1
$ gem list

*** LOCAL GEMS ***

bigdecimal (1.2.4)
bundler (1.5.3)
bundler-unload (1.0.2)
executable-hooks (1.3.1)
gem-wrappers (1.2.4)
io-console (0.4.2)
json (1.8.1)
minitest (4.7.5)
psych (2.0.3)
rake (10.1.0)
rdoc (4.1.0)
rubygems-bundler (1.4.2)
rvm (1.11.3.9)
test-unit (2.1.1.0)
jackju at macbook-air  ~/tmp/delme1
$ bundle
Fetching git://github.com/survili/ffi-compiler.git
remote: Reusing existing pack: 260, done.
remote: Counting objects: 5, done.
remote: Compressing objects: 100% (5/5), done.
remote: Total 265 (delta 2), reused 0 (delta 0)
Receiving objects: 100% (265/265), 38.59 KiB | 0 bytes/s, done.
Resolving deltas: 100% (116/116), done.
Fetching gem metadata from http://rubygems.org/.........
Fetching additional metadata from http://rubygems.org/..
Resolving dependencies...
Installing rake (10.3.1)
Installing ffi (1.9.3)
Using ffi-compiler (0.1.4) from git://github.com/survili/ffi-compiler.git (at master)

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /home/jackju/.rvm/rubies/ruby-2.1.1/bin/ruby -rubygems /home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem/gems/rake-10.3.1/bin/rake RUBYARCHDIR=/home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem/extensions/x86_64-linux/2.1.0/libmspack-0.0.4 RUBYLIBDIR=/home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem/extensions/x86_64-linux/2.1.0/libmspack-0.0.4
rake aborted!
LoadError: cannot load such file -- ffi-compiler/compile_task
/home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem/gems/libmspack-0.0.4/ext/Rakefile:1:in `<top (required)>'
(See full trace by running task with --trace)

rake failed, exit code 1

Gem files will remain installed in /home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem/gems/libmspack-0.0.4 for inspection.
Results logged to /home/jackju/.rvm/gems/ruby-2.1.1@stackoverproblem/extensions/x86_64-linux/2.1.0/libmspack-0.0.4/gem_make.out
An error occurred while installing libmspack (0.0.4), and Bundler cannot
continue.
Make sure that `gem install libmspack -v '0.0.4'` succeeds before bundling.
jackju at macbook-air  ~/tmp/delme1
$ ls
Gemfile
jackju at macbook-air  ~/tmp/delme1
$ 

Answer 1

问题是缺少“rubygems/任务”，这是在这个创业板：https://github.com/postmodern/rubygems-tasks中发现的。

我能够按照以下步骤在我的机器上安装libmspack：

1. gem安装rubygems-任务
2. git克隆git@github.com:survili/ffi-编译器.git
3. cd ffi编译器
4. 耙造宝石
5. gem安装pkg/ffi-编译器-0.1.4
6. gem安装libmspack -v '0.0.4‘

Successfully installed libmspack-0.0.4 
1 gem installed