[ruby-core:83240] [Ruby trunk Bug#13997] Bundler gem binstub broken

Issue #13997 has been updated by hone (Terence Lee).


Eregon (Benoit Daloze) wrote:
> So #load indeed does not support this skipping-until-ruby-shebang logic that `ruby file` does.
> 
> I wonder why Bundle is trying to load a binary.
> To save some time over creating another Ruby process?

Ah, I see what you're saying.

After some more inspection, it looks like there's something weird going on with how bundler's files in ```exe/``` are generated. This is bundler's file:

```ruby
#!/bin/sh
# -*- ruby -*-
bindir="${0%/*}"
exec "$bindir/ruby" -x "$0" "$@"
#!/usr/bin/env ruby
# frozen_string_literal: true

load File.expand_path("../bundle", __FILE__)

```

This is rake's file:

```ruby
$ cat /tmp/rubytest/lib/ruby/gems/2.5.0/gems/rake-12.1.0/exe/rake 
#!/usr/bin/env ruby

#--
# Copyright (c) 2003, 2004, 2005, 2006, 2007  Jim Weirich
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#++

require "rake"

Rake.application.run
```

----------------------------------------
Bug #13997: Bundler gem binstub broken
https://bugs.ruby-lang.org/issues/13997#change-67191

* Author: hone (Terence Lee)
* Status: Feedback
* Priority: Normal
* Assignee: hsbt (Hiroshi SHIBATA)
* Target version: 2.5
* ruby -v: ruby 2.5.0preview1 (2017-10-10 trunk 60153) [x86_64-linux]
* Backport: 
----------------------------------------
Hi,

In Ruby 2.5.0-preview1, I'm seeing the following error if the Rubygems binstub PATH precedes the binstubs from ruby and the Bundler version installed is <= 1.15.4 (what ruby vendors).

~~~
/home/hone/.rvm/gems/ruby-2.4.1@global/bin/bundle:22:in `load': /tmp/bundler/lib/ruby/gems/2.5.0/gems/bundler-1.15.4/exe/bundle:4: syntax error, unexpected tSTRING_BEG, expecting keyword_do or '{' or '(' (SyntaxError)
exec "$bindir/ruby" -x "$0" "$@"
                       ^
/tmp/bundler/lib/ruby/gems/2.5.0/gems/bundler-1.15.4/exe/bundle:9: syntax error, unexpected keyword_do_block, expecting end-of-input
Signal.trap("INT") do
~~~

The reason for this is because the generated bundler binstub by rubygems runs code like this:

~~~
load Gem.bin_path('bundler', 'bundle', '>= 0.a')
~~~

The problem is that the binstub from the vendored bundler in ruby is not pure ruby:

~~~
#!/bin/sh
# -*- ruby -*-
bindir="${0%/*}"
exec "$bindir/ruby" -x "$0" "$@"
~~~

The top of this file is shell and not ruby. Kernel#load chokes on this.

Thanks,
Terence



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