<code>direnv</code> is an extension of your shell. It augments the existing shell with a new feature that can load and unload environment variables depending on the current directory.
<h3 id="heading-use-cases">Use cases</h3>
<ul>
<li>Load 12factor apps environment variables
</li>
<li>Create per-project isolated development environments
</li>
<li>Load secrets for deployment
</li>
</ul>
<h3 id="heading-installation-and-how-to-use">Installation and how to use</h3>
<ul>
<li>Install direnv if not installed
<pre><code class="lang-bash"> sudo apt-get install direnv
</code></pre>
</li>
<li>Change your directory where you want to set the environment variable
<pre><code class="lang-bash"> cd devstack
</code></pre>
</li>
<li>Set the desired variable in <code>.envrc</code> file
<pre><code class="lang-bash"> echo export OPENEDX_RELEASE=maple.master &gt; .envrc
</code></pre>
</li>
<li>Allow direnv
<pre><code class="lang-bash"> direnv allow .
</code></pre>
</li>
<li>Check direnv status, whether the <code>.envrc</code> file is loaded or not
<pre><code class="lang-bash"> direnv status
</code></pre>
</li>
<li>Add the following line at the end of your <code>~/.bashrc</code> file
<pre><code class="lang-bash"> # Make sure it appears even after rvm, git-prompt, and other shell extensions that manipulate your prompt.
 eval "$(direnv hook bash)"
</code></pre>
</li>
<li>Check your variable
<pre><code class="lang-bash"> # If this doesn't work then close the Terminal and open again and move to you directory
 echo ${OPENEDX_RELEASE-nope}
</code></pre>
</li>
</ul>
<h3 id="heading-references">References:</h3>
<ul>
<li><a href="https://direnv.net/" class="autolinkedURL autolinkedURL-url" target="_blank">direnv.net</a>
</li>
<li><a href="http://manpages.ubuntu.com/manpages/focal/man1/direnv.1.html" class="autolinkedURL autolinkedURL-url" target="_blank">manpages.ubuntu.com/manpages/focal/man1/dir..</a>
</li>
<li><a href="https://forum.opencraft.com/t/devstack-tips-and-tricks-general-discussion/65/32" class="autolinkedURL autolinkedURL-url" target="_blank">forum.opencraft.com/t/devstack-tips-and-tri..</a>
</li>
</ul>

`direnv` is an extension of your shell. It augments the existing shell with a new feature that can load and unload environment variables depending on the current directory.

### Use cases

* Load 12factor apps environment variables
    
* Create per-project isolated development environments
    
* Load secrets for deployment
    

### Installation and how to use

* Install direnv if not installed
    
    ```bash
    sudo apt-get install direnv
    ```
    
* Change your directory where you want to set the environment variable
    
    ```bash
    cd devstack
    ```
    
* Set the desired variable in `.envrc` file
    
    ```bash
    echo export OPENEDX_RELEASE=maple.master > .envrc
    ```
    
* Allow direnv
    
    ```bash
    direnv allow .
    ```
    
* Check direnv status, whether the `.envrc` file is loaded or not
    
    ```bash
    direnv status
    ```
    
* Add the following line at the end of your `~/.bashrc` file
    
    ```bash
    # Make sure it appears even after rvm, git-prompt, and other shell extensions that manipulate your prompt.
    eval "$(direnv hook bash)"
    ```
    
* Check your variable
    
    ```bash
    # If this doesn't work then close the Terminal and open again and move to you directory
    echo ${OPENEDX_RELEASE-nope}
    ```
    

### References:

* https://direnv.net/
    
* http://manpages.ubuntu.com/manpages/focal/man1/direnv.1.html
    
* https://forum.opencraft.com/t/devstack-tips-and-tricks-general-discussion/65/32

direnv setup on Linux/Ubuntu machines as per the project requirement

direnv setup on Linux/Ubuntu

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