Rubygems on Mac OS X

[Geoff Hulette]

I am having a problem getting gems configured properly on my Mac (OS X
10.4.7), hopefully someone here can help me out. I installed ruby and
ruby gems using the instructions at
http://hivelogic.com/articles/2005/12/01/ruby_rails_lighttpd_mysql_tiger.
I am trying to use the XmlSimple gem, but Ruby can't seem to find it, or
any other gems. I did

$ sudo gem install xml-simple

which seemed to work fine. but then

$ ruby -e "require 'xmlsimple'"
-e:1:in `require': no such file to load -- xmlsimple (LoadError)
from -e:1

maybe gems is installed wrong?

some other, possibly useful info:
$ ruby -v
ruby 1.8.4 (2005-12-24) [powerpc-darwin8.7.0]
$ which ruby
/usr/local/bin/ruby
$ gem env
Rubygems Environment:
- VERSION: 0.9.0 (0.9.0)
- INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
- GEM PATH:
- /usr/local/lib/ruby/gems/1.8
- REMOTE SOURCES:
- http://gems.rubyforge.org

Thanks in advance!
-geoff

 

[lists]

Try this:

ruby -e "require 'rubygems'; require 'xml-simple'"

You have to require rubygems first.

-Ryan

 

[Chris Gehlker]

I am trying to use the XmlSimple gem, but Ruby can't seem to find
it, or
any other gems. I did

$ sudo gem install xml-simple

which seemed to work fine. but then

$ ruby -e "require 'xmlsimple'"
-e:1:in `require': no such file to load -- xmlsimple (LoadError)
from -e:1

maybe gems is installed wrong?

I do:
require 'rubygems'
require_gem '<gem_name>'

Which seems to work just fine.

 

[Jim Weirich]

I am having a problem getting gems configured properly on my Mac (OS X
10.4.7), hopefully someone here can help me out. I installed ruby and
ruby gems using the instructions at
http://hivelogic.com/articles/2005/12/01/ruby_rails_lighttpd_mysql_tiger.
I am trying to use the XmlSimple gem, but Ruby can't seem to find it, or
any other gems. I did

$ sudo gem install xml-simple

which seemed to work fine. but then

$ ruby -e "require 'xmlsimple'"
-e:1:in `require': no such file to load -- xmlsimple (LoadError)
from -e:1

Rubygems is not loaded with your program. There several ways to
accomplish this. This URL will help:
http://docs.rubygems.org/read/chapter/3#page70.

In a nutshell, you should be able to do this:

$ ruby -e "require 'rubygems'; require 'xmlsimple'"

-- Jim Weirich

 

[Geoff Hulette]

$ ruby -e "require 'xmlsimple'"

Rubygems is not loaded with your program. There several ways to
accomplish this. This URL will help:
http://docs.rubygems.org/read/chapter/3#page70.

In a nutshell, you should be able to do this:

$ ruby -e "require 'rubygems'; require 'xmlsimple'"

-- Jim Weirich

That works, thanks!
-geoff

 

[darren kirby]

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quoth the lists:

Try this:

ruby -e "require 'rubygems'; require 'xml-simple'"

You have to require rubygems first.

-Ryan

Sorry to hijack here, but this is an issue that has sort of unsettled me as=
I=20
have seen it come up on this list a few times. Perhaps I am not understandi=
ng=20
gems fully here, but what if you are writing software to be released to the=
=20
public that relies on a 3rd party library?

Some might have the lib installed from gems and some might have installed=20
manually or whatever ... so how do you reconcile the two if you must requir=
e=20
rubygems to use gem installed libs? Why is the gems directory not added to=
=20
the regular include path? Are you required to write code to deal with this?=
=20
How do experienced Ruby devs deal with this issue? Or am I just thick and i=
t=20
isn't an issue at all?

any insight appreciated,

=2Dd
=2D-=20
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
=2D Dennis Ritchie and Ken Thompson, June 1972

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[Tilman Sauerbeck]

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darren kirby [2006-08-13 05:34]:

quoth the lists:
=20
Sorry to hijack here, but this is an issue that has sort of unsettled me = as I=20
have seen it come up on this list a few times. Perhaps I am not understan= ding=20
gems fully here, but what if you are writing software to be released to t= he=20
public that relies on a 3rd party library?
=20
Some might have the lib installed from gems and some might have installed= =20
manually or whatever ... so how do you reconcile the two if you must requ= ire=20
rubygems to use gem installed libs? Why is the gems directory not added t= o=20
the regular include path? Are you required to write code to deal with thi= s?=20
How do experienced Ruby devs deal with this issue? Or am I just thick and= it=20
isn't an issue at all?
=20
any insight appreciated,

export RUBYOPT=3Drubygems

The you can use "require" to load both gem-libraries and
non-gem-libraries.

Regards,
Tilman

--=20
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

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[darren kirby]

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quoth the Tilman Sauerbeck:

export RUBYOPT=3Drubygems

The you can use "require" to load both gem-libraries and
non-gem-libraries.

Regards,
Tilman

Thanks Tilman,
That's what I was looking for...

=2Dd
=2D-=20
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
=2D Dennis Ritchie and Ken Thompson, June 1972

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[Matt Todd]

You can also do

ruby -rrubygems -e "require 'xmlsimple'"

which will "require 'rubygems'" for you (because of the "-rrubygems").
Read up on -r if it doesn't click for you.

Cheers,

M.T.

 

[khaines]

export RUBYOPT=rubygems

Of course, this isn't such a great solution from inside a library,
However, it's not too hard.

begin
require 'rubygems'
rescue LoadError
end

 

[Tilman Sauerbeck]

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(e-mail address removed) [2006-08-14 00:04]:

On Sun, 13 Aug 2006, Tilman Sauerbeck wrote:
=20
=20
Of course, this isn't such a great solution from inside a library,=20
However, it's not too hard.

If you are the author of some library:

cat <<EOF >>README
If you're using rubygems, please export RUBYOPT=3Drubygems.
EOF

Done.

Regards,
Tilman

--=20
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

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[darren kirby]

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quoth the Tilman Sauerbeck:

If you are the author of some library:

cat <<EOF >>README
If you're using rubygems, please export RUBYOPT=3Drubygems.
EOF

Done.

I guess it would be bad form to go setting env variables on someone's syste=
m=20
from within a lib...=20

So you could do:

begin
require 'rubygems'
rescue LoadError
end
require 'libfoo'

And it would load 'libfoo' either through gems, if present, or regularly if=
=20
not? Is that right?

Regards,
Tilman

=2Dd
=2D-=20
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
=2D Dennis Ritchie and Ken Thompson, June 1972

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[Tilman Sauerbeck]

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darren kirby [2006-08-14 05:57]:

quoth the Tilman Sauerbeck:
=20
I guess it would be bad form to go setting env variables on someone's sys= tem=20
from within a lib...=20

Of course. That's why you would tell your fellow users to please export
RUBYOPT=3Drubygems. So you don't have to change your code.

I'm sure this is documented somewhere, too.

Regards,
Tilman

--=20
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

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