What is the difference between Gemfile and Gemfile lock?

The Gemfile is where you specify which gems you want to use, and lets you specify which versions. The Gemfile. lock file is where Bundler records the exact versions that were installed. This way, when the same library/project is loaded on another machine, running bundle install will look at the Gemfile.

What creates Gemfile lock?

The Ruby platform the Gemfile. lock was generated against. If any dependencies in the Gemfile specify a platform then they will only be included in the Gemfile. lock when the lockfile is generated on that platform (e.g., through an install).

Should you ignore Gemfile lock?

Assuming you’re not writing a rubygem, Gemfile. lock should be in your repository. It’s used as a snapshot of all your required gems and their dependencies. This way bundler doesn’t have to recalculate all the gem dependencies each time you deploy, etc.

Is Gemfile lock auto generated?

Important! Gemfile. lock is automatically generated when you run bundle install or bundle update . It should never be edited manually.

What is a Gemfile in Ruby?

Gemfile – A format for describing gem dependencies for Ruby programs. A Gemfile describes the gem dependencies required to execute associated Ruby code. Place the Gemfile in the root of the directory containing the associated code.

What is Gemfile lock in Ruby?

The Gemfile. lock file is where Bundler records the exact versions that were installed. This way, when the same library/project is loaded on another machine, running bundle install will look at the Gemfile. Running different versions on different machines could lead to broken tests, etc.

How do you create a Gemfile in Ruby?

The Gemfile is just a text file within your project which contains a list of gems for use in your application. A gemfile is automatically created when you start a new rails application. type rails new appName and then it will be generated automatically. It will also be populated with some gems.

Why do we need Gemfile?

Gemfile is the main file responsible for holding the names and the versions of all the dependencies of your current project. So once you pull and do “`bundle install“` , the bundler picks up the versions and the source to download them, from the Gemfile. lock, the wrong file(Gemfile.

What is Gemfile in Ruby on Rails?

Can you update Gemfile lock?

Just running bundle install will not update an existing Gemfile. lock. To do so, you need to run bundle update . All that said, there are no actual changes to the versions in your Gemfile.

What format is Gemfile?

Package that may contain Ruby programs and libraries; saved in a self-contained format called a “gem;” can be installed using the RubyGems package manager application included with the Ruby software. Ruby GEM files can be installed using the “gem install GEMNAME [options]” command.

What is require false in Gemfile?

You use :require => false when you want the gem to be installed but not “required”. So in the example you gave: gem ‘whenever’, :require => false when someone runs bundle install the whenever gem would be installed as with gem install whenever .

What is a gem file in Ruby?

A gem is a collection of Ruby code that we can extract into a “collection” which we can call later. Your Gemfile should always be in the root of your project directory, this is where Bundler expects it to be and it is the standard place for any package manager style files to live.

What is the Gemfile lock file?

The Gemfile.lock file is where Bundler records the exact versions that were installed. This way, when the same library/project is loaded on another machine, running bundle install will look at the Gemfile.lock and install the exact same versions, rather than just using the Gemfile and installing the most recent versions.

What is the purpose of a Gemfile?

It is used for describing gem dependencies for Ruby programs. The first thing in your gemfile is a source in which you tell the Gemfile where to look for gems. Source can be called as a block and you can have multiple sources in your gemfile. Here is some documentation where you can read more about gemfile http://bundler.io/gemfile.html

What is the use of opengemfile in rails?

Gemfile is a file which must be located in root of your rails project. It is used for describing gem dependencies for Ruby programs.