Having Rails 2.3pre or Rack 1.1 installed breaks Rails 2.x - Ruby on Rails: Core

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Message from discussion Having Rails 2.3pre or Rack 1.1 installed breaks Rails 2.x
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From: Yehuda Katz <wyc...@gmail.com>
Date: Mon, 22 Feb 2010 02:25:12 -0800
Message-ID: <245fb4701002220225t1e5a92f7v716343379ef89...@mail.gmail.com>
Subject: Re: [Rails-core] Having Rails 2.3pre or Rack 1.1 installed breaks 
	Rails 2.x
To: rubyonrails-core@googlegroups.com
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Hongli,

This is a classic problem of the sort Bundler was created to solve. The only
possible solutions are to either ensure that these versions of the gems do
not coexist in a system gems repo or to use a tool like bundler to
pre-resolve the list of needed dependencies.

Simply changing the 2.3 dependency to >= 1.0.0 is a problem because Rails
could potentially break if a new (incompatible) version of Rack is released.
The entire purpose of the ~> dependency is to say "I know for sure I work on
Rack 1.0.x, but not some future version".

Yehuda Katz
Developer | Engine Yard
(ph) 718.877.1325


On Mon, Feb 22, 2010 at 1:44 AM, Hongli Lai <hon...@phusion.nl> wrote:

> Hi guys, can I call attention for this ticket? I think it's pretty
> severe.
>
> https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/4031-having-rails-23pre-or-rack-11-installed-breaks-rails-2x
>
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Hongli,<div><br></div><div>This is a classic problem of the sort Bundler wa=
s created to solve. The only possible solutions are to either ensure that t=
hese versions of the gems do not coexist in a system gems repo or to use a =
tool like bundler to pre-resolve the list of needed dependencies.</div>

<div><br></div><div>Simply changing the 2.3 dependency to &gt;=3D 1.0.0 is =
a problem because Rails could potentially break if a new (incompatible) ver=
sion of Rack is released. The entire purpose of the ~&gt; dependency is to =
say &quot;I know for sure I work on Rack 1.0.x, but not some future version=
&quot;.</div>

<div><br><div>Yehuda Katz<br>Developer | Engine Yard<br>(ph) 718.877.1325<b=
r>
<br><br><div class=3D"gmail_quote">On Mon, Feb 22, 2010 at 1:44 AM, Hongli =
Lai <span dir=3D"ltr">&lt;<a href=3D"mailto:hon...@phusion.nl">hongli@phusi=
on.nl</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

Hi guys, can I call attention for this ticket? I think it&#39;s pretty<br>
severe.<br>
<a href=3D"https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tick=
ets/4031-having-rails-23pre-or-rack-11-installed-breaks-rails-2x" target=3D=
"_blank">https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/ticket=
s/4031-having-rails-23pre-or-rack-11-installed-breaks-rails-2x</a><br>


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