I'd like the option to use awesome_print in every IRB console or Rails console.
The IRB console is pretty much working satisfactorily right now. If I run irb, I can type require 'awesome_print' and it works.
The Rails console isn't as easy. require 'awesome_print' doesn't work. I apparently have to do this:
> $LOAD_PATH << '~/.rvm/gems/ruby-2.1.8/gems/awesome_print-1.7.0/lib'
After that, require 'awesome_print' works fine.
But I definitely don't want to have to type $LOAD_PATH << '~/.rvm/gems/ruby-2.1.8/gems/awesome_print-1.7.0/lib' and then require 'awesome_print' every single time I open a Rails console just to be able to use awesome_print. That seems ridiculous.
So, how can I permanently add a path to Ruby's $LOAD_PATH?
Note: I don't want to add awesome_print to the Gemfile of any particular project. I want awesome_print to be available to all my Ruby/Rails projects.
You could simply use a a ~/.irbrc file and do:
require 'awesome_print'
Now, open up another IRB prompt:
irb(main):003:0> ap hash
{
"a" => "b"
}
Edit: this isn't working in rails, seems to be a known issue.
puts the following to the .irbrc:
to_load = %w[
awesome_print
coderay
hirb
pry
pry-doc
pry-remote
pry-theme
slop
yard
].join('|')
regexp = Regexp.new( "(#{to_load})" )
Gem.path.each do |path|
Dir.new("#{path}/gems").each do |gem_path|
next if %w[ . .. ].any?{ |d| gem_path == d }
new_el = "#{path}/gems/#{gem_path}/lib"
$LOAD_PATH << new_el if new_el =~ regexp
end
end
Related
Trying to write a custom irb for a gem to ease debugging. At the point where the shell loads and you can use it like ruby console but running into this wall
MyClass.get_last_instance
=>
_.attributes
=> {'attribute'=> 'test'}
The instance was found but a blank string is echo'ed. Here are the requires involved in starting the shell
require 'irb'
require 'irb/completion'
require 'debugger'
I tried reading through the rails source code, didn't get very far, mostly because I didn't really know what I was looking for. I think I'm just missing a require of a part of rails that echos objects.
create a .irbrc in your home path for ubuntu/osx and use the below code, it will work. Also you can add additional gems also debugger or irb
# print SQL to STDOUT
if ENV.include?('RAILS_ENV') && !Object.const_defined?('RAILS_DEFAULT_LOGGER')
require 'logger'
end
# Autocomplete
require 'irb/completion'
# Prompt behavior
ARGV.concat [ "--readline", "--prompt-mode", "simple" ]
# History
require 'irb/ext/save-history'
IRB.conf[:SAVE_HISTORY] = 100
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-save-history"
# Easily print methods local to an object's class
class Object
def local_methods
(methods - Object.instance_methods).sort
end
end
# copy a string to the clipboard
def pbcopy(string)
`echo "#{string}" | pbcopy`
string
end
require "rubygems"
I'm using awesome_print gem to display output from pry to look pretty. Since, awesome_print uses line breaks, long outputs like ap html.chapters.order("position ASC") only shows the end part of the output, How Do I paginate the result to look like its, piped to less or more
Thanks.
Add this to the .pryrc:
begin
require 'awesome_print'
Pry.config.print = proc { |output, value| Pry::Helpers::BaseHelpers.stagger_output("=> #{value.ai}", output) }
rescue LoadError => err
puts "no awesome_print :("
end
https://github.com/pry/pry/wiki/FAQ#wiki-awesome_print
And in case you are unfamiliar with .pryrc:
When pry starts, it checks for a .pryrc file in your home
directory(~/.pryrc) and also for a per-project .pryrc in the current
directory(./.pryrc). Both files are used if they exist, with the file
from your home directory being loaded first.
https://github.com/pry/pry/wiki/Pry-rc
I have the requirement to run a Watir test code from the Ruby on Rails framework. My ruby on rails hello world works perfectly and so does my Watir test (when i run from the irb and when run as an individial ruby script ) , but my requirement is to call the watir code from within the rails controller, which is giving a cannot Load Watir error.
This requirement is very urgent, and i can't figure out what the error is.
Note: The rails application is run on the netbeans 6.9 IDE and uses the native ruby interpreter in the system (not the default jruby)
I have the following versions:
ruby : 1.9.3
watir : 3.0.0
Rails : 3.2.8
LoadError (cannot load such file -- Watir):
app/controllers/watir_controller.rb:4:in `<class:WatirController>'
app/controllers/watir_controller.rb:1:in `<top (required)>'
This is my controller class which calls the watir script:
class WatirController < ApplicationController
## the Watir controller
require 'rubygems'
require 'watir'
# set a variable
test_site = "http://www.google.com"
# open the IE browser
ie = Watir::IE.new
# print some comments
puts "Beginning of test: Google search."
puts " Step 1: go to the test site: " + test_site
ie.goto test_site
puts " Step 2: enter 'pickaxe' in the search text field."
ie.text_field(:name, "q").set "pickaxe" # "q" is the name of the search field
#puts " Step 3: click the 'Google Search' button."
ie.button(:name, "btnG").click # "btnG" is the name of the Search button
puts " Expected Result:"
puts " A Google page with results should be shown. 'Programming Ruby' should be high on the list."
puts " Actual Result:"
if ie.text.include? "Programming Ruby"
puts " Test Passed. Found the test string: 'Programming Ruby'. Actual Results match Expected Results."
else
puts " Test Failed! Could not find: 'Programming Ruby'."
end
puts "End of test: Google search."
end
I don't understand as to why you need to use Watir inside of your Rails controller?
Watir is for browser automation to test things out which means that you should put it into your test/spec directory and put watir to the Gemfile into development and test group like this:
group :development, :test do
gem "watir"
end
Since you're using Rails and you probably would test the application written in Rails then i'd also recommend to use watir-rails. Also, if you're using RSpec, use watir-rspec. This means that your Gemfile should look like this:
group :development, :test do
gem "watir-rails"
gem "watir-rspec"
end
You have to include it in your gem file.
Gemfile
gem 'watir'
controller
class MyApp::WebCrawlerController
require "watir"
require "nokogiri"
def index
browser = Watir::Browser.new
browser.goto 'http://www.google.com'
doc = Nokogiri::HTML.parse(browser.html)
end
end
I'm trying to write a rakefile outside of a rails project.
I've created a new directory, added a rakefile and set a basic default task. It works.
I want to use the premailer gem so in my default task I've added this -
premailer = Premailer.new('http://localhost/email.html', :warn_level => Premailer::Warnings::SAFE)
This doesn't work, I get the following error.
uninitialized constant Object::Premailer
How do I refer to the premailer gem in my task? Should I be including it in a gemfile of sorts?
You can work without a Gemfile like this:
require 'rubygems' # only needed for ruby 1.8.7
require 'premailer'
desc "My Task"
task :my_task do
..
premailer = Premailer.new(...)
...
end
or with a Gemfile:
require 'rubygems' # only needed for ruby 1.8.7
require 'bundler'
Bundler.setup
Bundler.require
desc "My Task"
task :my_task do
..
premailer = Premailer.new(...)
...
end
I hope this helps.
I have a very simple controller:
require 'net/ssh'
class MyController < ApplicationController
def foo
render :text => 'bar'
end
end
But when I request http://server:3000/my/foo I get:
MissingSourceFile in MyController#foo
no such file to load -- net/ssh
The gem is installed
> gem list net-ssh
*** LOCAL GEMS ***
net-ssh (2.0.11)
Also, I tried require 'net/ssh' in IRB, and it works.
MyController works fine on Windows, but fail on Ubuntu.
What can be wrong?
In a project I am working on we have used the config/environment.rb file to hold the gem require stuff. So
Rails::Initializer.run do |config|
# ...
config.gem 'net-ssh'
config.gem 'daemons'
config.gem 'slave'
config.gem 'vpim'
config.gem 'json'
# ...
end
I think you will require 'net-ssh' rather than 'net/ssh'. However we did run into a problem where have a hyphen in the name of the gem led to failures. Then we had to do
config.gem 'Ruby-IRC', :lib => 'IRC'
so that version maybe required for you. So that would be
config.gem 'net-ssh', :lib => 'net/ssh'
in case of rails 3.0
this solution if OK.
add this in the yourapp/Gemfile,
gem 'net-ssh
This may help:
Rails Gem Dependencies and Plugin Errors
This is also worth watching:
Railscasts: Gem Dependencies
In my case, since it's a stand alone ruby app, I only needed to require rubygems.
You can also use Dr Nic's ''gemsonrails'' and load vendored gems as plugins, check:
http://gemsonrails.rubyforge.org
I think, the original problem was that I used normal user instead of root:
$ gem install net-ssh
WARNING: Installing to ~/.gem since /usr/lib/ruby/gems/1.8 and
/usr/bin aren't both writable.
WARNING: You don't have /home/alex/.gem/ruby/1.8/bin in your PATH,
gem executables will not run.
So, I guess, rails could not find this gem.