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Unity and npm packages

Every Arkvory repository is an npm-compatible registry at https://<host>/npm/<repository>/. The Unity Package Manager reads it as a scoped registry, and npm publishes to it and installs from it. Studios use it for SDKs, tools and modules that several Unity projects share, each with its own version.

Package tarballs are ordinary artifacts, so repository permissions, quotas, SHA-256 checks, backups and mirrors apply to them.

Before you start

You need:

• The server address with HTTPS (see HTTPS).
• A repository, for example games. Its registry address is https://arkvory.example/npm/games/.
• A key. Developers use a personal access token with the scope read. Build agents that publish use a personal token with the scope read-write or a service key. See Accounts and keys.

Arkvory sends the address of each tarball to the client in the package data. The address is built from the host name with which the client came. When a reverse proxy ends HTTPS, it must pass the Host header and send X-Forwarded-Proto: https, as in the nginx example of the installation. Otherwise the client receives http:// addresses of tarballs.

Add the registry to a Unity project

1. Open Packages/manifest.json of the project and add a scoped registry:

{
  "scopedRegistries": [
    {
      "name": "Arkvory",
      "url": "https://arkvory.example/npm/games/",
      "scopes": ["com.proanima"]
    }
  ],
  "dependencies": {
    "com.proanima.tools": "1.2.0"
  }
}

2. Give Unity the key. Do not put it in the project. Create the file .upmconfig.toml in your user folder (%USERPROFILE%\.upmconfig.toml on Windows, ~/.upmconfig.toml on macOS and Linux):

[npmAuth."https://arkvory.example/npm/games/"]
token = "<your Arkvory key>"
alwaysAuth = true

3. Restart Unity. In the Package Manager window, open My Registries to see the packages of the registry.

Notes:

• scopes are prefixes of package names. Unity takes the packages whose names start with a scope from Arkvory, and all other packages from the Unity registry.
• The address in .upmconfig.toml must be the same as url in the manifest, including the final slash.
• alwaysAuth = true is required. The registry does not send a login challenge, so Unity must send the token with every request.
• Unity package names are reverse domain names in lowercase, such as com.company.package. Unity does not support names with @scope/.

Commit Packages/manifest.json with the project. Each developer keeps their own .upmconfig.toml.

Publish a package

A package is a folder with a package.json at the top. Publish it with npm.

1. In the folder of the package, create an .npmrc file:

registry=https://arkvory.example/npm/games/
//arkvory.example/npm/games/:_authToken=${ARKVORY_TOKEN}

2. Set the key in the environment and publish:

export ARKVORY_TOKEN="$(cat ~/.arkvory/key)"
npm publish

$env:ARKVORY_TOKEN = (Get-Content C:\Private\arkvory.key -Raw).Trim()
npm publish

The line with _authToken must start with the address of the registry without https:. Keep the key out of .npmrc: npm replaces ${ARKVORY_TOKEN} from the environment.

Instead of the registry line in .npmrc, you can set the registry in the package.json of the package:

{
  "name": "com.proanima.tools",
  "version": "1.2.0",
  "publishConfig": { "registry": "https://arkvory.example/npm/games/" }
}

What the registry checks:

• Name and version. name and version in the package.json inside the tarball must match the published ones. The version follows SemVer 2.0.0, for example 1.2.0 or 2.0.0-beta.1. The registry reads the data of the version from this file, not from the JSON that the client sends.
• Checksums. The length, shasum and integrity that the client declares must match the bytes. A mismatch returns 422 integrity_mismatch.
• The tarball. It must contain <folder>/package.json, as npm pack makes it. A second package.json in the archive is refused, because npm and the registry could read different files.
• A version is immutable. The same tarball published again succeeds and changes nothing (200). Other content for an existing version returns 409 with the reason version_exists. Publish the fix as the next version.

npm publish reads the package from the registry before it publishes, so give a publishing key content.read and artifact.list as well as upload.create. See Permissions.

The version is available as soon as npm publish returns. The tarball of a version is stored as the artifact <name>-<version>.tgz with the label npm. For a name with a scope, @team/util becomes util-<version>.tgz.

Install packages

In Unity, add the dependency in the manifest or choose the package in the Package Manager window under My Registries.

For npm, set the registry in the .npmrc of the project or of your user. A registry for one scope is the usual choice, because Arkvory does not forward requests to the public npm registry:

@team:registry=https://arkvory.example/npm/games/
//arkvory.example/npm/games/:_authToken=${ARKVORY_TOKEN}

npm install @team/util
npm view @team/util versions
npm search tools

If you set registry= to Arkvory for the whole project, npm looks for every package there, including public ones such as lodash, and fails with 404. Use a scoped registry or a project that holds only your own packages.

npm checks dist.integrity while it installs and writes the registry address into package-lock.json.

Versions and dist-tags

A dist-tag is a movable name for a version. npm publish sets latest to the new version. Other tags help to separate release channels.

npm publish --tag beta
npm dist-tag add com.proanima.tools@1.3.0 latest
npm dist-tag ls com.proanima.tools
npm dist-tag rm com.proanima.tools beta

npm install com.proanima.tools@beta

Rule	Value
Tag name	Starts with a letter. Letters, digits, ., _ and -. Up to 64 characters.
Forbidden tags	A name that looks like a version (v1, v2.0), and x or X
latest	Always points to a version. It can be moved, not removed (409).
Moving a tag	npm dist-tag add, or publishing with --tag. The new version must exist.

A tag is only a name: it does not delete or hide other versions.

There is no way to remove a published version. See Not supported.

Search

The list of My Registries in Unity and npm search use the search address /-/v1/search. The search finds packages whose name or description contains the text, in any case, and packages that have the text as a whole keyword. Without text, it lists all packages.

• It returns one line per package: the version with the tag latest, or else the newest version.
• The results are sorted by name. There is no ranking by popularity.
• size is 20 by default and at most 250. from is the offset.

curl -fsS -H "Authorization: Bearer $ARKVORY_TOKEN" \
  "https://arkvory.example/npm/games/-/v1/search?text=tools&from=0&size=20"

To read a package directly, request its name. @scope/name can be sent as @scope%2fname:

curl -fsS -H "Authorization: Bearer $ARKVORY_TOKEN" https://arkvory.example/npm/games/com.proanima.tools

The answer lists every version with the content of its package.json (including the fields unity and displayName that Unity reads), the dist-tags and the publication times. dist has tarball, shasum (SHA-1) and integrity (SHA-512).

Names and limits

Item	Rule
Package name	Lowercase letters, digits, ., _, ~ and -, starting with a letter or a digit. Up to 214 characters. @scope/name is allowed for npm.
Version	SemVer 2.0.0, up to 256 characters
package.json in the tarball	Up to 256 KiB. The data of all versions come in one answer, so keep it small.
Tarball	Up to the maximum object size of the installation, ARKVORY_MAX_OBJECT_BYTES (about 10 TiB by default). An archive that expands more than 100 times plus 64 MiB is refused.
The rest of the publish request	Up to 8 MiB of JSON, nested at most 64 levels. The tarball is read as a stream and is not kept in memory.
One publish request	Must finish within 30 minutes and must not pause for more than 30 seconds (ARKVORY_UPLOAD_DEADLINE_MS, ARKVORY_UPLOAD_IDLE_TIMEOUT_MS)
Uploads at the same time	2 per server and 1 per key by default. A waiting request gives up after 20 seconds.
Search text	Up to 256 characters

npm publish is one request, and it starts again from the first byte after a failure. For packages of many gigabytes, upload the file with arkvoryctl as an artifact or a raw file. Large binary assets that change often are better placed in Git LFS; keep code and stable resources in packages.

The limits of the server are in Environment variables.

Permissions

Personal tokens and file keys get read or write access to the repository. Service keys get exact actions.

Operation	Service key actions	Personal token or file key
Install: read a package and download a tarball	content.read	Read access
Search, list dist-tags	artifact.list	Read access
Publish, add and remove dist-tags	upload.create	Write access, token scope read-write

A developer who only installs packages needs a token with the scope read. A build agent that publishes needs upload.create, content.read and artifact.list. Nobody can delete a published version.

Read gateways and mirrors

• A read gateway serves installation and search, because they are GET requests. A publish gets 405.
• A mirror holds the versions and tags of its source. Installation and search work. Publishing is refused with 409 and the reason mirror_read_only. The tarball addresses in the data of a mirror point to the mirror.

To use a mirror in Unity, put the address of the mirror in url and its key in .upmconfig.toml.

Not supported

• Removing a version (npm unpublish). Projects pin versions, and a removal would break their builds. Publish a corrected version and move the tag instead.
• npm deprecate, npm login, npm owner, npm access and other management commands. Requests that change data on other paths answer 405 with "This registry supports publish, install and dist-tags". Create a token in the console and put it in .npmrc instead of npm login.
• The list of all packages at /-/all, and npm audit.
• A proxy to the public registries. Arkvory stores your own packages. Packages from npmjs.com or the Unity registry are fetched from there.
• Ranking of search results.
• A section for packages in the console. Tarballs appear in المُخرَجات as artifacts with the label npm.

Troubleshooting

Errors have the form {"error": "...", "code": "...", "request_id": "..."}. npm prints error. Give the request_id to your administrator to find the request in the server log.

Symptom	Cause	What to do
401 in Unity or npm	The client did not send the key, or the key is wrong, expired or revoked	In Unity, check that the address in .upmconfig.toml equals url in the manifest and that alwaysAuth = true. In npm, check that the _authToken line starts with the same host and path as registry.
403 when publishing	The token has the scope read, or the key lacks upload.create	Use a key with write access
404 for a package	There is no such package in this repository, or the key does not see the repository	Check the repository in the address and the name. For a Unity package, check that its name starts with a scope from scopes.
404 for a public package	registry= points to Arkvory for all packages	Use @scope:registry=
409 with version_exists	The version exists with other content	Publish a new version
409 with state_conflict	You tried to remove latest	Move latest to another version instead
409 with mirror_read_only	The repository is a mirror	Publish to the main server
422 with integrity_mismatch	The bytes differ from the declared shasum or integrity	Pack and publish again. Check that no proxy changes the body.
400 "package.json names another package or version"	The package.json inside the tarball differs from the published name or version	Run npm publish from a clean build of the package
400 "Only publishing a new version is supported"	The command sent a changed package, for example npm deprecate	These commands are not supported
405	The command is not supported by this registry	See Not supported
507	The repository quota or the capacity of the installation is reached	Free space or ask for a larger quota
503	Too many uploads at the same time	Wait and retry
Tarball downloads from http:// and fails	The proxy does not send X-Forwarded-Proto: https	Fix the proxy as described in Before you start

Related pages

• Clients and protocols
• Git LFS
• Accounts and keys
• HTTPS
• Mirrors