/usr/share/doc/ruby-dotenv/README.md is in ruby-dotenv 0.9.0-1.
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Dotenv loads environment variables from `.env` into `ENV`.
Storing [configuration in the environment](http://www.12factor.net/config) is one of the tenets of a [twelve-factor app](http://www.12factor.net/). Anything that is likely to change between deployment environments–such as resource handles for databases or credentials for external services–should be extracted from the code into environment variables.
But it is not always practical to set environment variables on development machines or continuous integration servers where multiple projects are run. Dotenv load variables from a `.env` file into ENV when the environment is bootstrapped.
## Installation
### Rails
Add this line to your application's Gemfile:
```ruby
gem 'dotenv-rails', :groups => [:development, :test]
```
And then execute:
$ bundle
### Sinatra or Plain ol' Ruby
Install the gem:
$ gem install dotenv
As early as possible in your application bootstrap process, load `.env`:
```ruby
require 'dotenv'
Dotenv.load
```
To ensure `.env` is loaded in rake, load the tasks:
```ruby
require 'dotenv/tasks'
task :mytask => :dotenv do
# things that require .env
end
```
## Usage
Add your application configuration to your `.env` file in the root of your project:
```shell
S3_BUCKET=YOURS3BUCKET
SECRET_KEY=YOURSECRETKEYGOESHERE
```
You can also create files per environment, such as `.env.test`.
```shell
S3_BUCKET=tests3bucket
SECRET_KEY=testsecretkey
```
An alternate yaml-like syntax is supported:
```yaml
S3_BUCKET: yamlstyleforyours3bucket
SECRET_KEY: thisisalsoanokaysecret
```
Whenever your application loads, these variables will be available in `ENV`:
```ruby
config.fog_directory = ENV['S3_BUCKET']
```
## Capistrano integration
In your `config/deploy.rb` file:
```ruby
require "dotenv/capistrano"
```
It will symlink the `.env` located in `/path/to/shared` in the new release.
## Should I commit my .env file?
It is recommended that you store development-only settings in your `.env` file, and commit it to your repository. Make sure that all your credentials for your development environment are different from your other deployments. This makes it easy for other developers to get started on your project, without compromising your credentials for other environments.
## Contributing
1. Fork it
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Added some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create new Pull Request
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