pastbedti.me » gems

New version of capistrano_colors released.

Mathias Stjernström — Sun, 04 Jan 2009 15:36:40 +0000

Just released a new version of capistrano_colors. This is a total rewrite from the last version. This post show some of the bigger changes.

The biggest/coolest changes:

You can write your own custom machers and colorize rows that’s special for you.
I found a pretty neat way of making capistrano_colors system wide.
You can hide rows that you do not care for

I do not want to bore you more so I’ll just skip to an example

If you have not already, install capistrano_colors (v.0.5.0)

1	sudo gem install capistrano_colors

The following commands can go into deploy.rb or ~/.caprc depending if you want cc for a single project or system wide.

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require 'capistrano_colors'

capistrano_color_matchers = [
{ :match => /command finished/, :color => :hide, :prio => 10 },
{ :match => /executing command/, :color => :blue, :prio => 10, :attribute => :underscore },
{ :match => /^transaction: commit$/, :color => :magenta, :prio => 10, :attribute => :blink },
{ :match => /git/, :color => :white, :prio => 20, :attribute => :reverse },
]

colorize( capistrano_color_matchers )

The only mandatory options are :match, :colors and :prio.

A fast description of the options:

:match – A regular expression of the row to match.

:color – The color we want on the matching rows.

:prio – What prio should this rule have (higher = more prio)

:attribute – Special effect (:underline, :reverse, :blink)

:level – Specify if this matcher should be bound to some of capistranos log levels (info,debug,…)

A more detailed description can be found at http://github.com/stjernstrom/capistrano_colors/tree/master

As this is a rewrite I would love some feedback.

Thanks!

Put some colors on your capistrano output

Mathias Stjernström — Sat, 20 Dec 2008 23:02:02 +0000

I got so tired of all the messy capistrano output so today I released my first public gem.

The name of the gem is capistrano_colors and the aim of the gem is to put some nice and shiny colors on capistrano output. The gem has only been tested with rails but should work wherever capistrano works.

Keep on reading to see some screenshots!

Just follow the instruction on the github page (http://github.com/stjernstrom/capistrano_colors/) and you will have a colorful output like the second screenshots in no time.

Capistrano output without capistrano_colors

Capistrano output with capistrano_colors

As you can see the output on the second image is much clearer and easier to understand.

Try it out and let me know what you think!

Cheers!

Ruby enterprise edition (REE) on Gentoo failed and some performance experience.

Mathias Stjernström — Mon, 15 Dec 2008 20:44:36 +0000

Today I got the chance to give Ruby Enterprise Edition a try. We are currently working with a really fun new environment and you do not get better opportunities to try new stuff as when you have a complete new environment thats not in production. So we gave REE a shoot. When compiling REE with got in trouble really fast and this post is about the quick fix to solve it and some of our early performance results.

The installation of REE is nothing more that unpacking ruby-enterprise-1.8.6-20081205.tar.gz and the run the installer.

1	tar xzvf ruby-enterprise-1.8.6-20081205.tar.gz

And after that we run

1	./ruby-enterprise-1.8.6-20081205/installer

This is when our problems started.

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chmod -R g+r,o+r,o-w /opt/ruby-enterprise-1.8.6-20081205/lib/ruby
--------------------------------------------
Installing RubyGems...
/opt/ruby-enterprise-1.8.6-20081205/bin/ruby setup.rb --no-ri --no-rdoc
/opt/ruby-enterprise-1.8.6-20081205/bin/ruby: no such file to load -- auto_gem (LoadError)
*** Cannot install RubyGems

This one took some time to find but first I could not understand why auto_gem was not found and also why it tried to load auto_gem when the installation of rubygems is not done.

After a few minutes of thinking and digging i found my environment variable RUBYOPT which was set to -rauto_gem.

1	RUBYOPT=-rauto_gem

This one makes rubygems to autoload when you run something in ruby. I already had this line because i had ruby/rubygems installed before we installed REE. I still want this enviroment but not during the installation so i disabled it by starting the installer like this:

1	RUBYOPT="" ./ruby-enterprise-1.8.6-20081205/installer

Passing the environment variable before the command just sets it for this command.

If you do want this change permanent some digging in /etc found there is no less that 3 files where this variable is set (depending of shells).

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grep -R "RUBYOPT" *
csh.env:setenv RUBYOPT '-rauto_gem'
env.d/10rubygems:RUBYOPT="-rauto_gem"
profile.env:export RUBYOPT='-rauto_gem'

After changing this variable everything worked as expected!

So far our experience with REE is great. With plain old ruby we where running about 15 passenger (mod_rails) instances and we where using around 1.6GB memory. After The ruby enterprise upgrade we are now using 26 instances with only 1.7GB memory. CPU loads when stressing seems to be 50% less with REE and pages load times are much more stable.

You have to take these measurements with a bit of salt because we only had around an hour of testing but they seem pretty impressive so far.

I will get back with more performance data as we play.

Cheers!

Merb 1.0 and Empty reply from server

Mathias Stjernström — Sun, 16 Nov 2008 13:51:03 +0000

Yesterday I upgraded merb to 1.0 and I got in some trouble that I solved pretty fast. Last night I started an empty application an got trouble again, but this time for real. I did a fresh install (removed all merb gems and datamapper gems). I generated a fresh merb app with merb-gen but i could not get it to work and all i got from merb was empty replies.

In this post I will try to describe the steps I took to track the problem down and how I solved it.

(I don’t care about this long post so just take me to the solution)

How i generated the app (on a fresh merb install)

Instruction from http://wiki.merbivore.com/howto/gettingstarted/firstapp

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> merb-gen app testapp
> cd testapp
> merb-gen resource article title:string,content:text
> rake db:automigrate
> merb
Loading init file from /Users/mathias/Documents/Dev/merb/testapp/config/init.rb
Loading /Users/mathias/Documents/Dev/merb/testapp/config/environments/development.rb
~ Connecting to database...
~ Loaded slice 'MerbAuthSlicePassword' ...
~ Parent pid: 1239
~ Compiling routes...
~ Activating slice 'MerbAuthSlicePassword' ...
merb : worker (port 4000) ~ Starting Mongrel at port 4000
merb : worker (port 4000) ~ Successfully bound to port 4000

Respons from merb

When i point the browser to http://localhost:4000/articles I get the following in the browser

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Safari can’t open the page “http://localhost:4000/articles/”.
The error was: “Operation could not be completed. (kCFErrorDomainCFNetwork error 302.)” (kCFErrorDomainCFNetwork:302)
Please choose Report Bugs to Apple from the Safari menu, note the error number, and describe what you did before you saw this message.

Testing the same url with curl i get

1 2	> curl http://localhost:4000/articles curl: (52) Empty reply from server

And the only thing i see in the console is the following. No error, no nothing.

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merb : worker (port 4000) ~ Started request handling: Sat Nov 15 20:39:57 +0100 2008
merb : worker (port 4000) ~ Routed to: {"format"=>nil, "action"=>"index", "controller"=>"articles"}
merb : worker (port 4000) ~ Params: {"format"=>nil, "action"=>"index", "controller"=>"articles"}

It seems that merb just drop the connection as soon as it get my request. The following part will be about my debugging.

My effort to solve/debug the problem.

First i followed the steps on http://wiki.merbivore.com/howto/installation/gems#troubleshooting and erased all my merb, datamapper and data_objects gems. Just to get a real clean start.

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> sudo gem update --system
> gem search --no-version merb | grep merb | xargs sudo gem uninstall -a
> gem search --no-version dm | grep dm | xargs sudo gem uninstall -a
> gem search --no-version data_objects | grep data_objects | xargs sudo gem uninstall -a
> sudo gem sources -c
> sudo rm /Library/Ruby/Gems/1.8/cache/merb*
> sudo rm /Library/Ruby/Gems/1.8/cache/dm*
> sudo gem install -r merb

After this i created a new application but still with the same result. Now my only option was to dig deep in merb to se why i get those empty replies. (I did stop by in #merb and got some suggestions but nothing helped).

I started in merb-core in the Dispatcher. The problem seems to be that merb cannot find any actions in my controllers. It does not raise an “action not found” but the problem points to actions/action args.

Digging deeper I finally find myself in merb-action-args. In the module GetArgs there is a function called get_args and it uses ParseTree to get all action and their arguments. After some simple debugging I found that this is the function that fail.

(Debugging took nearly 2 hours)

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def get_args
klass, meth = self.to_s.split(/ /).to_a[1][0..-2].split("#")
# Remove stupidity for #
klass = $` if klass =~ /\(/
ParseTreeArray.translate(Object.full_const_get(klass), meth).get_args
end

The row 5 silently fails.

This make me wonder whats up with my ParseTree installation. Listing my ParseTree gems get me notified of how many versions i have.

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Select gem to uninstall:
1. ParseTree-1.7.1
2. ParseTree-2.1.1
3. ParseTree-2.2.0
4. ParseTree-3.0.1
5. ParseTree-3.0.2
6. All versions

I first try to reinstall ParseTree with sudo gem install ParseTree to reinstall 3.0.2.
The problem still exists so my next step is to uninstall all version and just install the last one.

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> sudo gem uninstall ParseTree

Select gem to uninstall:
1. ParseTree-1.7.1
2. ParseTree-2.1.1
3. ParseTree-2.2.0
4. ParseTree-3.0.1
5. All versions
> 5

> sudo gem install ParseTree
Successfully installed ParseTree-3.0.2
1 gem installed

EVREKA!

This makes merb happy again. Seems like my collection of ParseTree installations made merb unhappy. To get some more understanding of what version made this error i reinstalls all my old versions again, one after one. But after every last one is installed merb still works so there must have been something very wrong with my gems. It shows that i am not alone if you read the comments from a merb 1.0 blog post

Summary

merb relies on other gems than the ones named merb-* in this case ParseTree. So when merb starts delivering empty results. There may be ParseTree thats broken. Just erase all ParseTree version and reinstall the ones you need and maybe you will be as happy as i am

Cheers!

Updating RubyGems to 1.3.1 on Mac OS X 10.5.5

Mathias Stjernström — Fri, 14 Nov 2008 20:35:30 +0000

Today i thought that i should give the new merb release a try. When updating my merb gems i got the following message.

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> sudo gem update
Password:
Updating installed gems
Updating merb
ERROR: While executing gem ... (Gem::InstallError)
merb-core requires RubyGems version >= 1.3.0

This post is how i solved my problem updating RubyGems to 1.3.1 on Mac OS X 10.5.5

Ok, so we a need to update RubyGems. No problems (sudo gem update –system) should do.

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> sudo gem update --system

Updating RubyGems
Updating rubygems-update
Successfully installed rubygems-update-1.3.1
ERROR: While executing gem ... (NameError)
undefined local variable or method `remote_gemspecs' for #

Grr… not… Well i think i heard something about rubygems-update so i think ill give it a try.

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> sudo update_rubygems
Installing RubyGems 1.3.1
mkdir -p /Library/Ruby/Site/1.8
mkdir -p /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin
install -c -m 0644 rbconfig/datadir.rb /Library/Ruby/Site/1.8/rbconfig/datadir.rb
install -c -m 0644 rubygems/builder.rb /Library/Ruby/Site/1.8/rubygems/builder.rb
install -c -m 0644 rubygems/command.rb /Library/Ruby/Site/1.8/rubygems/command.rb
install -c -m 0644 rubygems/command_manager.rb /Library/Ruby/Site/1.8/rubygems/command_manager.rb
install -c -m 0644 rubygems/commands/build_command.rb /Library/Ruby/Site/1.8/rubygems/commands/build_command.rb
install -c -m 0644 rubygems/commands/cert_command.rb /Library/Ruby/Site/1.8/rubygems/commands/cert_command.rb
install -c -m 0644 rubygems/commands/check_command.rb /Library/Ruby/Site/1.8/rubygems/commands/check_command.rb
install -c -m 0644 rubygems/commands/cleanup_command.rb /Library/Ruby/Site/1.8/rubygems/commands/cleanup_command.rb
install -c -m 0644 rubygems/commands/contents_command.rb /Library/Ruby/Site/1.8/rubygems/commands/contents_command.rb
install -c -m 0644 rubygems/commands/dependency_command.rb /Library/Ruby/Site/1.8/rubygems/commands/dependency_command.rb
install -c -m 0644 rubygems/commands/environment_command.rb /Library/Ruby/Site/1.8/rubygems/commands/environment_command.rb
install -c -m 0644 rubygems/commands/fetch_command.rb /Library/Ruby/Site/1.8/rubygems/commands/fetch_command.rb
install -c -m 0644 rubygems/commands/generate_index_command.rb /Library/Ruby/Site/1.8/rubygems/commands/generate_index_command.rb
install -c -m 0644 rubygems/commands/help_command.rb /Library/Ruby/Site/1.8/rubygems/commands/help_command.rb
install -c -m 0644 rubygems/commands/install_command.rb /Library/Ruby/Site/1.8/rubygems/commands/install_command.rb
install -c -m 0644 rubygems/commands/list_command.rb /Library/Ruby/Site/1.8/rubygems/commands/list_command.rb
install -c -m 0644 rubygems/commands/lock_command.rb /Library/Ruby/Site/1.8/rubygems/commands/lock_command.rb
install -c -m 0644 rubygems/commands/mirror_command.rb /Library/Ruby/Site/1.8/rubygems/commands/mirror_command.rb
install -c -m 0644 rubygems/commands/outdated_command.rb /Library/Ruby/Site/1.8/rubygems/commands/outdated_command.rb
install -c -m 0644 rubygems/commands/pristine_command.rb /Library/Ruby/Site/1.8/rubygems/commands/pristine_command.rb
install -c -m 0644 rubygems/commands/query_command.rb /Library/Ruby/Site/1.8/rubygems/commands/query_command.rb
install -c -m 0644 rubygems/commands/rdoc_command.rb /Library/Ruby/Site/1.8/rubygems/commands/rdoc_command.rb
install -c -m 0644 rubygems/commands/search_command.rb /Library/Ruby/Site/1.8/rubygems/commands/search_command.rb
install -c -m 0644 rubygems/commands/server_command.rb /Library/Ruby/Site/1.8/rubygems/commands/server_command.rb
install -c -m 0644 rubygems/commands/sources_command.rb /Library/Ruby/Site/1.8/rubygems/commands/sources_command.rb
install -c -m 0644 rubygems/commands/specification_command.rb /Library/Ruby/Site/1.8/rubygems/commands/specification_command.rb
install -c -m 0644 rubygems/commands/stale_command.rb /Library/Ruby/Site/1.8/rubygems/commands/stale_command.rb
install -c -m 0644 rubygems/commands/uninstall_command.rb /Library/Ruby/Site/1.8/rubygems/commands/uninstall_command.rb
install -c -m 0644 rubygems/commands/unpack_command.rb /Library/Ruby/Site/1.8/rubygems/commands/unpack_command.rb
install -c -m 0644 rubygems/commands/update_command.rb /Library/Ruby/Site/1.8/rubygems/commands/update_command.rb
install -c -m 0644 rubygems/commands/which_command.rb /Library/Ruby/Site/1.8/rubygems/commands/which_command.rb
install -c -m 0644 rubygems/config_file.rb /Library/Ruby/Site/1.8/rubygems/config_file.rb
install -c -m 0644 rubygems/custom_require.rb /Library/Ruby/Site/1.8/rubygems/custom_require.rb
install -c -m 0644 rubygems/defaults.rb /Library/Ruby/Site/1.8/rubygems/defaults.rb
install -c -m 0644 rubygems/dependency.rb /Library/Ruby/Site/1.8/rubygems/dependency.rb
install -c -m 0644 rubygems/dependency_installer.rb /Library/Ruby/Site/1.8/rubygems/dependency_installer.rb
install -c -m 0644 rubygems/dependency_list.rb /Library/Ruby/Site/1.8/rubygems/dependency_list.rb
install -c -m 0644 rubygems/digest/digest_adapter.rb /Library/Ruby/Site/1.8/rubygems/digest/digest_adapter.rb
install -c -m 0644 rubygems/digest/md5.rb /Library/Ruby/Site/1.8/rubygems/digest/md5.rb
install -c -m 0644 rubygems/digest/sha1.rb /Library/Ruby/Site/1.8/rubygems/digest/sha1.rb
install -c -m 0644 rubygems/digest/sha2.rb /Library/Ruby/Site/1.8/rubygems/digest/sha2.rb
install -c -m 0644 rubygems/doc_manager.rb /Library/Ruby/Site/1.8/rubygems/doc_manager.rb
install -c -m 0644 rubygems/exceptions.rb /Library/Ruby/Site/1.8/rubygems/exceptions.rb
install -c -m 0644 rubygems/ext/builder.rb /Library/Ruby/Site/1.8/rubygems/ext/builder.rb
install -c -m 0644 rubygems/ext/configure_builder.rb /Library/Ruby/Site/1.8/rubygems/ext/configure_builder.rb
install -c -m 0644 rubygems/ext/ext_conf_builder.rb /Library/Ruby/Site/1.8/rubygems/ext/ext_conf_builder.rb
install -c -m 0644 rubygems/ext/rake_builder.rb /Library/Ruby/Site/1.8/rubygems/ext/rake_builder.rb
install -c -m 0644 rubygems/ext.rb /Library/Ruby/Site/1.8/rubygems/ext.rb
install -c -m 0644 rubygems/format.rb /Library/Ruby/Site/1.8/rubygems/format.rb
install -c -m 0644 rubygems/gem_openssl.rb /Library/Ruby/Site/1.8/rubygems/gem_openssl.rb
install -c -m 0644 rubygems/gem_path_searcher.rb /Library/Ruby/Site/1.8/rubygems/gem_path_searcher.rb
install -c -m 0644 rubygems/gem_runner.rb /Library/Ruby/Site/1.8/rubygems/gem_runner.rb
install -c -m 0644 rubygems/indexer.rb /Library/Ruby/Site/1.8/rubygems/indexer.rb
install -c -m 0644 rubygems/install_update_options.rb /Library/Ruby/Site/1.8/rubygems/install_update_options.rb
install -c -m 0644 rubygems/installer.rb /Library/Ruby/Site/1.8/rubygems/installer.rb
install -c -m 0644 rubygems/local_remote_options.rb /Library/Ruby/Site/1.8/rubygems/local_remote_options.rb
install -c -m 0644 rubygems/old_format.rb /Library/Ruby/Site/1.8/rubygems/old_format.rb
install -c -m 0644 rubygems/package/f_sync_dir.rb /Library/Ruby/Site/1.8/rubygems/package/f_sync_dir.rb
install -c -m 0644 rubygems/package/tar_header.rb /Library/Ruby/Site/1.8/rubygems/package/tar_header.rb
install -c -m 0644 rubygems/package/tar_input.rb /Library/Ruby/Site/1.8/rubygems/package/tar_input.rb
install -c -m 0644 rubygems/package/tar_output.rb /Library/Ruby/Site/1.8/rubygems/package/tar_output.rb
install -c -m 0644 rubygems/package/tar_reader/entry.rb /Library/Ruby/Site/1.8/rubygems/package/tar_reader/entry.rb
install -c -m 0644 rubygems/package/tar_reader.rb /Library/Ruby/Site/1.8/rubygems/package/tar_reader.rb
install -c -m 0644 rubygems/package/tar_writer.rb /Library/Ruby/Site/1.8/rubygems/package/tar_writer.rb
install -c -m 0644 rubygems/package.rb /Library/Ruby/Site/1.8/rubygems/package.rb
install -c -m 0644 rubygems/platform.rb /Library/Ruby/Site/1.8/rubygems/platform.rb
install -c -m 0644 rubygems/remote_fetcher.rb /Library/Ruby/Site/1.8/rubygems/remote_fetcher.rb
install -c -m 0644 rubygems/require_paths_builder.rb /Library/Ruby/Site/1.8/rubygems/require_paths_builder.rb
install -c -m 0644 rubygems/requirement.rb /Library/Ruby/Site/1.8/rubygems/requirement.rb
install -c -m 0644 rubygems/rubygems_version.rb /Library/Ruby/Site/1.8/rubygems/rubygems_version.rb
install -c -m 0644 rubygems/security.rb /Library/Ruby/Site/1.8/rubygems/security.rb
install -c -m 0644 rubygems/server.rb /Library/Ruby/Site/1.8/rubygems/server.rb
install -c -m 0644 rubygems/source_index.rb /Library/Ruby/Site/1.8/rubygems/source_index.rb
install -c -m 0644 rubygems/source_info_cache.rb /Library/Ruby/Site/1.8/rubygems/source_info_cache.rb
install -c -m 0644 rubygems/source_info_cache_entry.rb /Library/Ruby/Site/1.8/rubygems/source_info_cache_entry.rb
install -c -m 0644 rubygems/spec_fetcher.rb /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb
install -c -m 0644 rubygems/specification.rb /Library/Ruby/Site/1.8/rubygems/specification.rb
install -c -m 0644 rubygems/test_utilities.rb /Library/Ruby/Site/1.8/rubygems/test_utilities.rb
install -c -m 0644 rubygems/timer.rb /Library/Ruby/Site/1.8/rubygems/timer.rb
install -c -m 0644 rubygems/uninstaller.rb /Library/Ruby/Site/1.8/rubygems/uninstaller.rb
install -c -m 0644 rubygems/user_interaction.rb /Library/Ruby/Site/1.8/rubygems/user_interaction.rb
install -c -m 0644 rubygems/validator.rb /Library/Ruby/Site/1.8/rubygems/validator.rb
install -c -m 0644 rubygems/version.rb /Library/Ruby/Site/1.8/rubygems/version.rb
install -c -m 0644 rubygems/version_option.rb /Library/Ruby/Site/1.8/rubygems/version_option.rb
install -c -m 0644 rubygems.rb /Library/Ruby/Site/1.8/rubygems.rb
install -c -m 0644 ubygems.rb /Library/Ruby/Site/1.8/ubygems.rb
cp gem /tmp/gem
install -c -m 0755 /tmp/gem /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/gem
rm /tmp/gem
rm -f /Users/mathias/.gem/source_cache
rm -f /Library/Ruby/Gems/1.8/source_cache
Removing old RubyGems RDoc and ri
rm -rf /Library/Ruby/Gems/1.8/doc/rubygems-1.2.0
Installing rubygems-1.3.1 ri into /Library/Ruby/Gems/1.8/doc/rubygems-1.3.1/ri
Installing rubygems-1.3.1 rdoc into /Library/Ruby/Gems/1.8/doc/rubygems-1.3.1/rdoc

------------------------------------------------------------------------------

= Announce: RubyGems Release 1.3.0

NOTE: RubyGems 1.1 and 1.2 have problems upgrading when there is no
rubygems-update installed. You will need to follow the second set of update
instructions if you see "Nothing to update".

Release 1.3.0 fixes some bugs.

Bugs fixed:

* Disregard ownership of ~ under Windows while creating ~/.gem. Fixes
issues related to no uid support under Windows.
* Fix requires for Gem::inflate, Gem::deflate, etc.
* Make Gem.dir respect :gemhome value from config. (Note: this feature may be
removed since it is hard to implement on 1.9.)
* Kernel methods are now private. Patch #20801 by Stefan Rusterholz.
* Gem::location_of_caller now behaves on Windows. Patch by Daniel Berger.
* Silence PATH warning.

Deprecation Notices:

* Gem::manage_gems will be removed on or after March 2009.

For a full list of changes to RubyGems and the contributor for each change, see
the ChangeLog file.

Special thanks to Chad Wooley for backwards compatibility testing and Luis
Lavena for continuing windows support.

== How can I get RubyGems?

NOTE: If you have installed RubyGems using a package system you may want to
install a new RubyGems through the same packaging system.

If you have a recent version of RubyGems (0.8.5 or later), then all
you need to do is:

$ gem update --system (you might need to be admin/root)

NOTE: RubyGems 1.1 and 1.2 have problems upgrading when there is no
rubygems-update installed. You will need to follow the second set of update
instructions if you see "Nothing to update".

NOTE: You may have to run the command twice if you have any previosly
installed rubygems-update gems.

If you have an older version of RubyGems installed, then you can still
do it in two steps:

$ gem install rubygems-update (again, might need to be admin/root)
$ update_rubygems (... here too)

If you don't have any gems install, there is still the pre-gem
approach to getting software ... doing it manually:

1. DOWNLOAD FROM: http://rubyforge.org/frs/?group_id=126
2. UNPACK INTO A DIRECTORY AND CD THERE
3. INSTALL WITH: ruby setup.rb (you may need admin/root privilege)

== To File Bugs

The RubyGems bug tracker can be found on RubyForge at:
http://rubyforge.org/tracker/?func=add&group_id=126&atid=575

When filing a bug, `gem env` output will be helpful in diagnosing the issue.

If you find a bug where RubyGems crashes, please provide debug output. You can
do that with `gem --debug the_command`.

== Thanks

Keep those gems coming!

-- Jim & Chad & Eric (for the RubyGems team)

------------------------------------------------------------------------------

RubyGems installed the following executables:
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/gem

If `gem` was installed by a previous RubyGems installation, you may need
to remove it by hand.

Ok, that went very well. A real lucky shot but hey, it worked

1 2	> gem --version 1.3.1

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> sudo gem update
Updating installed gems
Updating merb
Successfully installed merb-core-1.0
Successfully installed merb-action-args-1.0
Successfully installed merb-assets-1.0
Successfully installed merb-slices-1.0
Successfully installed merb-auth-core-1.0
Successfully installed merb-auth-more-1.0
Successfully installed merb-auth-slice-password-1.0
Successfully installed merb-auth-1.0
Successfully installed merb-cache-1.0
Successfully installed merb-exceptions-1.0
Successfully installed merb-gen-1.0
Successfully installed merb-haml-1.0
Successfully installed merb-helpers-1.0
Successfully installed merb-mailer-1.0
Successfully installed merb-param-protection-1.0
Successfully installed merb_datamapper-1.0
Successfully installed merb-more-1.0
Successfully installed merb-1.0

Cheers!

Stuck with a gem that just wont uninstall

Mathias Stjernström — Tue, 13 May 2008 18:56:05 +0000

Yesterday i was updating all my ruby gems. During the update a got disturbed by something so i did not pay attention what gems got updated.

This morning i found my current app not starting up.

This is how i solved it

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#script/server
=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment...
** Rails loaded.
** Loading any Rails specific GemPlugins
Exiting
/opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require': no such file to load -- /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1-java/lib/mongrel/init.rb (MissingSourceFile)
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:342:in `new_constants_in'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/dependencies.rb:495:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/gem_plugin-0.2.3/lib/gem_plugin.rb:134:in `load'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:184:in `each'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:184:in `each'
from /opt/local/lib/ruby/gems/1.8/gems/gem_plugin-0.2.3/lib/gem_plugin.rb:112:in `load'
... 21 levels...
from /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from script/server:3`

Ok, so now what? I know i do not run java. Not just yet.

My update last night must have installed a mongrel-1.1-java, no biggy i just uninstall.

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gem uninstall mongrel

Select gem to uninstall:
1. mongrel-1.0.1
2. mongrel-1.0.2
3. mongrel-1.1
4. mongrel-1.1-java
5. mongrel-1.1.1
6. mongrel-1.1.4
7. All versions
> 4
INFO: In order to remove mongrel, please execute:
gem uninstall mongrel --install-dir=/opt/local/lib/ruby/gems/1.8

If i add the install dir i get the same result. Just for fun i try to delete the ruby-java-gem folder -> /opt/local/lib/ruby/gems/1.8/gems/mongrel-1.1-jruby/

But still the same error and gem still think the gem is installed.

This became my solution

For each installed gem there is a gemspec file that holds information about the gem. After deleting the gemspec for ruby-1.1-java everything went back to normal.

1	sudo rm /opt/local/lib/ruby/gems/1.8/specifications/mongrel-1.1.1.gemspec

Hope this can help someone