VS Code extensions

This article will show you the ways to add VS Code extensions and use them with a Coder workspace:

Using the public extensions marketplaces with Code Web (code-server)
Adding extensions to custom images
Installing extensions using its vsix file at the command line
Installing extensions from a marketplace using the command line
Using a local VS Code instance with SSH

Using the public extensions marketplaces

You can manually add an extension while you're working in the Code Web IDE. The extensions can be from Eclipse Open VSX's public marketplace or the Eclipse Open VSX local marketplace.

Site managers can configure the specific marketplace to use.

Code Web (code-server) cannot legally connect to Microsoft's public marketplace.

Adding extensions to custom images

You can add extensions to a custom image and install them either through Code Web or using the workspace's terminal.

Download the extension(s) from the Microsoft public marketplace.
Add the vsix extension files to the same folder as your Dockerfile.
In the Dockerfile, add instructions to make a folder and to copy the vsix files into the newly created folder.
Add a configure script to the folder with your Dockerfile, and run code-server to install the extension (be sure to update the filename below):
```
 /var/tmp/coder/code-server/bin/code-server --install-extension /vsix/YOUR_EXTENSION.vsix
```
Build the custom image, and upload to the Docker registry you've connected to Coder.
Import the custom image into Coder.
Create a workspace using the custom image.

You will now have access to the extension in your workspace.

Installing extensions using its `vsix` file at the command line

Using the workspace's terminal or the terminal available inside Code Web (code server), you can install an extension whose files you've downloaded from a marketplace:

/var/tmp/coder/code-server/bin/code-server --install-extension /vsix/ms-python.python-2020.10.332292344.vsix

You can also run these commands within a template, configure script or personalize script.

Installing from a marketplace at the command line

Using the workspace's terminal or the terminal available inside Code Web (code server), run the following to install an extension from the currently configured marketplace, which defaults to Open VSX's public marketplace (be sure to update the snippets with the name of the extension you want to install):

/var/tmp/coder/code-server/bin/code-server --install-extension ms-python.python

To install from a different marketplace you can set the EXTENSIONS_GALLERY environment variable, which corresponds to the extensionsGallery entry in Code Web's product.json:

EXTENSIONS_GALLERY='{"serviceUrl": "https://my-extensions/api"}' /var/tmp/coder/code-server/bin/code-server --install-extension ms-python.python

Using a local VS Code instance with SSH