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Code Extension Marketplace

The Code Extension Marketplace is an open-source alternative to the VS Code Marketplace for use in editors like code-server or VSCodium.

It is maintained by Coder and is used by our enterprise customers in regulated and security-conscious industries like banking, asset management, military, and intelligence where they deploy Coder in an air-gapped network. Accessing an Internet-hosted marketplace is not allowed.

This marketplace reads extensions from file storage and provides an API for editors to consume. It does not have a frontend or any mechanisms for extension authors to add or update extensions in the marketplace.

Deployment

The marketplace is a single binary. Deployment involves running the binary, pointing it to a directory of extensions, and exposing the binary's bound address in some way.

Kubernetes

If deploying with Kubernetes see the Helm directory otherwise read on.

Getting the binary

The binary can be downloaded from GitHub releases. For example here is a way to download the latest release using wget. Replace $os and $arch with your operating system and architecture.

wget https://github.com/coder/code-marketplace/releases/latest/download/code-marketplace-$os-$arch -O ./code-marketplace
chmod +x ./code-marketplace

Running the server

The marketplace server can be ran using the server sub-command.

./code-marketplace server [flags]

Run ./code-marketplace --help for a full list of options.

Local storage

To use a local directory for extension storage use the --extensions-dir flag.

./code-marketplace [command] --extensions-dir ./extensions

Artifactory storage

It is possible use Artifactory as a file store instead of local storage. For this to work the ARTIFACTORY_TOKEN environment variable must be set.

export ARTIFACTORY_TOKEN="my-token"
./code-marketplace [command] --artifactory http://artifactory.server/artifactory --repo extensions

The token will be used as the Authorization header with the value Bearer <TOKEN>.

Exposing the marketplace

The marketplace must be put behind TLS otherwise code-server will reject connecting to the API. This could mean using a TLS-terminating reverse proxy like NGINX or Caddy with your own domain and certificates or using a service like Cloudflare.

When hosting the marketplace behind a reverse proxy set either the Forwarded header or both the X-Forwarded-Host and X-Forwarded-Proto headers. These headers are used to generate absolute URLs to extension assets in API responses. One way to test this is to make a query and check one of the URLs in the response:

$ curl 'https://example.com/api/extensionquery' -H 'Accept: application/json;api-version=3.0-preview.1' --compressed -H 'Content-Type: application/json' --data-raw '{"filters":[{"criteria":[{"filterType":8,"value":"Microsoft.VisualStudio.Code"}],"pageSize":1}],"flags":439}' | jq .results[0].extensions[0].versions[0].assetUri
"https://example.com/assets/vscodevim/vim/1.24.1"

The marketplace does not support being hosted behind a base path; it must be proxied at the root of your domain.

Health checks

The /healthz endpoint can be used to determine if the marketplace is ready to receive requests.

Adding extensions

Extensions can be added to the marketplace by file, directory, or web URL.

./code-marketplace add extension.vsix [flags]
./code-marketplace add extension-vsixs/ [flags]
./code-marketplace add https://domain.tld/extension.vsix [flags]

If the extension has dependencies or is in an extension pack those details will be printed. Extensions listed as dependencies must also be added but extensions in a pack are optional.

If an extension is open source you can get it from one of three locations:

  1. GitHub releases (if the extension publishes releases to GitHub).
  2. Open VSX (if the extension is published to Open VSX).
  3. Building from source.

For example to add the Python extension from Open VSX:

./code-marketplace add https://open-vsx.org/api/ms-python/python/2022.14.0/file/ms-python.python-2022.14.0.vsix [flags]

Or the Vim extension from GitHub:

./code-marketplace add
https://github.com/VSCodeVim/Vim/releases/download/v1.24.1/vim-1.24.1.vsix [flags]

Removing extensions

Extensions can be removed from the marketplace by ID and version (or use --all to remove all versions).

./code-marketplace remove ms-python.python-2022.14.0 [flags]
./code-marketplace remove ms-python.python --all [flags]

Usage in code-server

export EXTENSIONS_GALLERY='{"serviceUrl":"https://<domain>/api", "itemUrl":"https://<domain>/item", "resourceUrlTemplate": "https://<domain>/files/{publisher}/{name}/{version}/{path}"}'
code-server

If code-server reports content security policy errors ensure that the marketplace is running behind an https URL.

Development

mkdir extensions
go run ./cmd/marketplace/main.go server [flags]

When testing with code-server you may run into issues with content security policy if the marketplace runs on a different domain over HTTP; in this case you will need to disable content security policy in your browser or manually edit the policy in code-server's source.

When you make a change that affects people deploying the marketplace please update the changelog as part of your PR.

You can use make gen to generate a mock extensions directory for testing and make upload to upload them to an Artifactory repository.

Tests

To run the tests:

make test

To run the Artifactory tests against a real repository instead of a mock:

export ARTIFACTORY_URI=myuri
export ARTIFACTORY_REPO=myrepo
export ARTIFACTORY_TOKEN=mytoken
make test

Missing features

  • Recommended extensions.
  • Featured extensions.
  • Download counts.
  • Ratings.
  • Searching by popularity.
  • Published, released, and updated dates for extensions (for example this will cause bogus release dates to show for versions).
  • Frontend for browsing available extensions.
  • Extension validation (only the marketplace owner can add extensions anyway).
  • Adding and updating extensions by extension authors.

Planned work

  • Bulk add from one Artifactory repository to another (or to itself).
  • Optional database to speed up queries.
  • Progress indicators when adding/removing extensions.

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Open source extension marketplace for VS Code.

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