[ruby-core:82190] [Ruby trunk Feature#12733] Bundle bundler to ruby core

[hsbt@ruby-lang.org]

Issue #12733 has been updated by hsbt (Hiroshi SHIBATA).


I've added `make test-bundler` task to the ruby core. 

see https://github.com/ruby/ruby/pull/1536

Maybe, I tested this patch with macOS only. Probably the following task is not compatible all of the supported platform.

https://github.com/ruby/ruby/pull/1536/files#diff-7e056ddc530791272d363e50c1f25647R488

I found problems with bundler test suite before `make install`environment.

1. Tests of `bundle install` with native extensions relied on installed ruby interpreter.
2. Tests of “default gems” are failed. Because they are not installed before `make install`
3. Tests of “bundler exec” with gem installed Gemfile relied on installed ruby interpreter.(ex. shebang of rack command use it)
4. bundler tests require “groff” command for man verification. ruby core could not prepare it.
5. Some tests depend on the directory structure of bundler/bundler.

I omitted or added workaround to theirs.

https://github.com/hsbt/ruby/blob/e16f39690e2e7843690f691e9f68e3371aba96f3/spec/bundler.patch

I have a happy news. `make test-bundler` results is here

2269 examples, 0 failures, 3 pending

I ignored 40 examples. but I got green results of most all of examples.


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Feature #12733: Bundle bundler to ruby core
https://bugs.ruby-lang.org/issues/12733#change-65957

* Author: hsbt (Hiroshi SHIBATA)
* Status: Assigned
* Priority: Normal
* Assignee: hsbt (Hiroshi SHIBATA)
* Target version: 2.5
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rubygems team has plan to migrate bundler into rubygems at rubygems 3.0.

ref. https://github.com/rubygems/rubygems/issues/1681

In current status, rubygems only use `Bundler` module on test suites.
But we should track rubygems upstream step by step. I propose to bundle bundler
for stdlib as default gem on ruby core repository.

but we have some consideration. such as

 * bundler uses rspec for test suites. How to use rspec on ruby core repository?
 * Who are maintain bundler on ruby core repository?

This issue is epic topic. Please comment your concerns or idea. 



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