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Posted to users@buildr.apache.org by 王雷 <ma...@gmail.com> on 2011/05/20 00:27:07 UTC

basic question about using Apache Buildr

Hi,

    I find in the apache ODE Rakefile the following line. What does this
line mean? Thanks.


    gem "buildr", "~>1.4.3"






    Best Regards



                     Lei Wang

Re: basic question about using Apache Buildr

Posted by Rhett Sutphin <rh...@detailedbalance.net>.

Hi,

On May 21, 2011, at 2:34 PM, 王雷 wrote:

> Hi,
> 
> 
>    Thanks for the fast reply.   How to figure out the version requirement
> is less than 1.5.0. Is there any document specify this? Thanks again.

It's what "~>" means in rubygems. If you want to learn more about rubygems, the documentation is at

http://docs.rubygems.org/

Rhett

> 
> 
>    Best Regards
> 
> 
>                Lei Wang.
> 
> 2011/5/20 Rhett Sutphin <rh...@detailedbalance.net>
> 
>> Hi,
>> 
>> On May 19, 2011, at 5:27 PM, 王雷 wrote:
>> 
>>> Hi,
>>> 
>>>   I find in the apache ODE Rakefile the following line. What does this
>>> line mean? Thanks.
>>> 
>>> 
>>>   gem "buildr", "~>1.4.3"
>> 
>> That means it uses the buildr gem at version greater than or equal to 1.4.3
>> but less than 1.5.0.
>> 
>> Rhett
>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>>   Best Regards
>>> 
>>> 
>>> 
>>>                    Lei Wang
>> 
>>

Re: basic question about using Apache Buildr

Posted by Alex Boisvert <al...@gmail.com>.

2011/5/21 王雷 <ma...@gmail.com>

>    Thanks for the fast reply.   How to figure out the version requirement
> is less than 1.5.0. Is there any document specify this? Thanks again.
>

Requirements such as "~>1.4.3" as used to allow any minor version upgrade
(e.g. bug fixes) but not allow major version changes that may involve some
non-backward-compatible changes.

Case in point:  Buildr 1.5.0 does not exist but it's possible we'll make
changes that could break some buildfiles.  (We try not to do that often, but
it's possible).

So "~>1.4.3" is a middle ground between fixed version (too strict) and
allowing any new version (too flexible).  It allows for minor upgrades that
could fix potential issues not currently known (e.g. platform-specific
issues, dependency evolution, and so on).

alex

Re: basic question about using Apache Buildr

Posted by 王雷 <ma...@gmail.com>.

Hi,


    Thanks for the fast reply.   How to figure out the version requirement
is less than 1.5.0. Is there any document specify this? Thanks again.


    Best Regards


                Lei Wang.

2011/5/20 Rhett Sutphin <rh...@detailedbalance.net>

> Hi,
>
> On May 19, 2011, at 5:27 PM, 王雷 wrote:
>
> > Hi,
> >
> >    I find in the apache ODE Rakefile the following line. What does this
> > line mean? Thanks.
> >
> >
> >    gem "buildr", "~>1.4.3"
>
> That means it uses the buildr gem at version greater than or equal to 1.4.3
> but less than 1.5.0.
>
> Rhett
>
> >
> >
> >
> >
> >
> >
> >    Best Regards
> >
> >
> >
> >                     Lei Wang
>
>

Re: basic question about using Apache Buildr

Posted by Rhett Sutphin <rh...@detailedbalance.net>.

Hi,

On May 19, 2011, at 5:27 PM, 王雷 wrote:

> Hi,
> 
>    I find in the apache ODE Rakefile the following line. What does this
> line mean? Thanks.
> 
> 
>    gem "buildr", "~>1.4.3"

That means it uses the buildr gem at version greater than or equal to 1.4.3 but less than 1.5.0.

Rhett

> 
> 
> 
> 
> 
> 
>    Best Regards
> 
> 
> 
>                     Lei Wang