| layout | title | cover | date | organiser |
|---|---|---|---|---|
post |
Gem Npm Packages |
img/blur-background-1680x1050-spectrum-electromagnetic-4k-901-1.jpg |
2015-10-18 |
Lucas Gatsas |
What is Gem? RubyGems is the official packaging system for ruby-lang.org programming language. It provides a packet format, a tool for managing packages, a repository for their distribution.
Since Ruby 1.9 RubyGems is part of the standard library of Ruby. If you want to use a RubyGem in a Ruby program, you must first load the required library:
Use
RubyGems be accessed via the command line acc.
Example :
require 'json' # aktuelle Version
gem 'rake', '= 10.1.0' # mit VersionsangabeGem Installation : Rake
Download and install rake with the following.
gem install rake
Example :
First, you must write a “Rakefile” file which contains the build rules. Here's a simple example:
task default: %w[test]
task :test do
ruby "test/unittest.rb"
endThis Rakefile has two tasks:
A task named “test”, which – upon invocation – will run a unit test file in Ruby.
A task named “default”. This task does nothing by itself, but it has exactly one dependency, namely the “test” task. Invoking the “default” task will cause Rake to invoke the “test” task as well.
Running the “rake” command without any options will cause it to run the “default” task in the Rakefile:
% ls
Rakefile test/
% rake
(in /home/some_user/Projects/rake)
ruby test/unittest.rb
....unit test output here...Type “rake –help” for all available options.
Link: rubygems.org Link: ruby-lang.org