I have configured lighttpd for CGI. Things are basically working except for requiring gems with Ruby. For example this script
#!/usr/bin/env ruby
require 'cgi'
require 'rubygems'
require 'mysql2'
cgi = CGI.new
print "Content-Type: text/plain\n\n"
print "Hello, world!"
gives me cannot load such file -- mysql2 (LoadError). If I remove the require 'mysql2' it works fine. I installed mysql2 as root, and other users can require it without issue.
What is also odd is that Gem.available? 'mysql2' is true in the CGI script, so it seems that the gem is being detected in some way.
I fixed it, but I'm still not sure what the issue was. As root, I did
gem update --system
gem install --no-user-install mysql2
For some reason the permissions ended up wrong so I had to do
chmod -R o+rX /usr/local/share/gems1.9
Then everything worked again. Also require 'rubygems' ended up being unnecessary in the CGI script.
Related
I am trying to run some older ruby script (with old ruby version) from within a ruby script. Here is a program:
old_ruby187.rb
#!/usr/ruby/1.8.7/bin/ruby
puts "Hello"
new_ruby230.rb
#!/usr/ruby/2.3.0/bin/ruby
require "rubygems"
require "bundler"
Bundler.setup # Code works if I comment this line
puts `old_ruby187.rb`
I get bundler load error. If I execute ./new_ruby230.rb, it gives an error for the last puts command line.:
'require': no such file to load -- rubygems (LoadError)
If I comment just Bundler.setup and run it, it works fine. Not sure if Bundler.setup tries to load something for system call. I need bundler for other gems used in new_ruby230.rb script.
Any help is appreciated.
Update (02/22/2018):
I ended up using ssh when calling old ruby script. Something like:
new_ruby230.rb
#!/usr/ruby/2.3.0/bin/ruby
require "rubygems"
require "bundler"
require "socket"
Bundler.setup
puts `ssh #{Socket.gethostname} old_ruby187.rb` # this worked!
Pretty sure you're not supposed to require rubygems like that. Bundler is there to manage your gems. Remove that require statement (require "rubygems") and you should be good to go.
I am trying to run a webscraper and when I execute the file I get the following error
/home/luis/.rbenv/versions/2.4.1/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- httparty (LoadError)
from /home/luis/.rbenv/versions/2.4.1/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from luismejia71lbs.rb:1:in `<main>'
I have HTTParty installed and even ran sudo gem install httparty a few times just in case. Not sure why it won't run and I can't find anything concrete. I recently installed rbenv in the last week, not sure if that is related, but since I was able to run httparty in the past.
Here is my file
webscraper.rb
require 'httparty'
require 'nokogiri'
require 'pry'
require 'json'
require 'csv'
craigslist = HTTParty.get('https://miami.craigslist.org/search/mdc/apa?min_bedrooms=3&max_bedrooms=3&min_bathrooms=2&max_bathrooms=2&availabilityMode=0')
Pry.start.(binding)
The error means rbenv can't find the httparty gem. Since rbenv installs gems under ~/.rbenv, you shouldn't need the sudo command to install httparty. Using sudo will almost certainly install in the wrong place. Just do:
$ gem install httparty
I have a script that needs to require specific files out of gems defined in the project Gemfile.
#!/usr/bin/env ruby
require 'some_gem/helpers/some_helper'
... rest of script
When I run the script, I get an error about not being able to load some_helper.rb. If I run with bundle exec command... then everything works.
I understand that bundle exec exposes the Gems to the $LOAD_PATH which lets require work. Is there a way to move that capability into the script so users don't have to type bundle exec?
Do I just need to add require "bundler/setup" to the script before I require the gem files?
http://bundler.io/v1.12/#getting-started
:)
#!/usr/bin/env ruby
require 'rubygems' # because reasons.. most probably it is not needed unless you are using really old ruby where it is not loaded by default
# also at the moment rubygems and bundler are being merged :)
require 'bundler/setup' # for things installed with bundler
require 'some_gem/helpers/some_helper'
You can also check e.g. http://mislav.net/2013/01/understanding-binstubs/
I'm writing a batch script as a setup for a ruby program I'm writing. It needs to be able to
a. Make sure Ruby is installed on the user's computer (and if not point them to the ruby download page)
b. make sure the ruby "yaml" gem is installed, which is a prerequisite for it. I've tried
gem install yaml
in the batch script to no avail. How can I write a batch script that will do these two things?
As far as I know, there is no yaml gem. Although it must be required in code that uses it, it is distributed as part of a Ruby installation. Try this:
ruby -ryaml -e"puts 'YAML found'"
It should work; and if you change the -r token to some nonexistent gem, you'll see an exception raised.
Instead of writing your own script, you could use bundler and create a gemfile. This way people can install all the gems on any operating system.
Example:
require 'rubygems'
require 'bundler/setup'
require 'nokogiri'
require 'rest-client'
#require all your gems like normal
def parse(site)
Nokogiri::HTML(RestClient.get(site))
end
And for the gem file:
source: "https://rubygems.org"
gem 'nokogiri', '~> 1.6.7.2' #<= you can specify which version
gem 'rest-client' #<= you don't have to specify a version though
After you've got everything set up, cd to the directory that has the gemfile and run bundle install this will install all the gems
I've got a Ruby app using deamon-kit to create a daemon that runs a cron task every 3 seconds.
Problem is I'm trying to add some error checking using Errbit, so that requires me to:
require 'hoptoad_notifier'
in my script. However, the script is complaining it can't find the file?
.rvm/gems/ruby-1.9.2-p320#stitch/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require': no such file to load -- hoptoad_notifier (LoadError)
What confuses me is that the gem is installed, when I run
gem list | grep hoptoad_notifier
I get
hoptoad_notifier (2.4.11)
Another test I did was to pop into irb console, on the same terminal window, after making sure I'm inside the correct RVM gemset off course:
1.9.2p320 :001 > require 'hoptoad_notifier'
=> true
1.9.2p320 :002 >
And voila, hoptoad is loading. It's only when loading my deamon-kit deamon, that I get the error.
What further confuses me is that when I look at my require block:
require 'rubygems'
require 'resque'
require 'hoptoad_notifier'
It's finding rubygems and resque, but not hoptoad_notifier? Why, when I comment out hoptoad, it doesn't also complain about resque and rubygems?
dameon-kit uses bundler, so you don't need to include rubygems. Include the following lines to your Gemfile :
gem 'resque'
gem 'hoptoad_notifier'
Run bundle install
and include your gems as usual :
require 'resque'
require 'hoptoad_notifier'
It worked for me.