@sanity/plugin-kit
NOTE
This is a developer preview package meant for Sanity Studio v3 plugin development.
For a v2 alternative, consider using Sanipack.
What is it?
@sanity/plugin-kit
is an opinionated, enhanced Sanity.io v3 plugin development experience.
It provides a set of CLI commands for initializing, verifying and testing a Sanity plugin for Sanity Studio v3.
The verify-package command can be used when upgrading V2 plugins to Studio V3 versions.
@sanity/plugin-kit also comes with a verify-studio command that can be used to recommend upgrade steps in existing Sanity Studio v2 studio.
This package assumes and recommends @sanity/pkg-utils for building,
and Yalc with watch for testing the plugin in Sanity Studio.
Check the FAQ fro more on these.
Table of contents
Installation
npm install --save-dev @sanity/plugin-kit
Install build tool
@sanity/plugin-kit assumes the plugin will use @sanity/pkg-utils for build and watch:
npm install --save-dev @sanity/plugin-kit
Initialize a new plugin
Quickstart
First, run the init command:
npx @sanity/plugin-kit init sanity-plugin-testing-it-out
cd sanity-plugin-testing-it-out
npm run link-watch
cd /path/to/my-studio
yalc add --link sanity-plugin-testing-it-out && yarn install
Now, configure the plugin in sanity.config.ts (or .js) in Sanity Studio:
import {createConfig} from 'sanity'
import {myPlugin} from 'sanity-plugin-testing-it-out'
export const createConfig({
plugins: [
myPlugin({})
]
})
Start the studio:
sanity start
Check browser console: the plugin should have logged "hello from my-sanity-plugin"
.
Since the plugin is running in watch mode, any changes you make to the plugin code will be reloaded in the studio.
Init options
The init commands has several config flags, run
npx @sanity/plugin-kit init --help
for up-to-date specifics.
Verify plugin package
Verify that the plugin package is configured correctly by running:
npx @sanity/plugin-kit verify-package
What does it do?
- Check package.json for:
- recommended script commands
- recommended cjs and esm configuration
- sanity dependency compatibility
- @sanity/pkg-utils devDependency
- recommended usage of devDependencies/peerDependencies/dependencies for certain packages
- Check for redundant v2 config:
- Check for sanity imports that has changed in v3, using eslint
- Check tsconfig.json settings
- Check for SPDX compatible license definition
- If the package uses TypeScript, this will also run
tsc --noEmit
when all other checks have passed
Each check will explain why it is needed, steps to fix it and how it can be individually disabled.
What it is not
verify-package
is not a codemod tool (yet). It will only check files and recommended settings: it will not change any files.
Upgrading a v2 plugin
Simply use the verify-package
command in a v2 plugin package, and it will notify you about steps you need to take to upgrade the
plugin to v3.
npx @sanity/plugin-kit verify-package
Upgrade help in V2 Studio
You can use the verify-studio
command in a v2 Sanity Studio to get some of the same validation there, to help in the upgrade from v2
to v3.
npx @sanity/plugin-kit verify-studio
This will:
- Check for
sanity.json,
sanity.config.(ts|js)
and sanity.cli.(ts|js)
and advice on how to convert the former to the latter two. - Check for sanity dependencies that has changed in v3
- Check for sanity imports that has changed in v3, using ESlint
Fail fast mode
npx @sanity/plugin-kit verify-package --single
npx @sanity/plugin-kit verify-package --studio --single
This will only output the first validation that fails. Useful when working through the list of issues by fixing and rerunning the command.
Inject config into existing v3
Consult the inject command CLI help:
npx @sanity/plugin-kit inject --help
for up-to-date specifics.
Testing a plugin in Sanity Studio
Ensure you have the following script setup in package.json:
{
"scripts": {
"link-watch": "plugin-kit link-watch"
}
}
Then, in a shell, run:
npm run link-watch
This will publish the plugin to a local yalc registry.
In another shell, in your test Sanity Studio directory, run:
npx yalc add <your-plugin-package> && npx yalc add <your-plugin-package> --link && npm install
You can now change your plugin code, which will:
- Trigger a rebuild using your watch task
- Update the files in the plugin output directory
- Trigger a
yalc publish --push
- Update the files in your Sanity Studio
- Trigger hot-reload; you should see changes in the Studio
Note: Yalc will modify your studio package.json when linking; remember to revert it when you are done testing.
You should also put .yalc
and yalc.lock
into .gitignore
.
When you are done testing, you can run
npx yalc remove <your-plugin-package> && yarn install
to restore the version in package.json
.
Link-watch configuration
This command can be configured using sanityPlugin.linkWatch
in package.json:
{
"sanityPlugin": {
"linkWatch": {
// directory to watch
"folder": "lib",
// command to run when content in linkWatch.folder changes
"command": "npm run watch",
// file extensions to watch for changes in the linkWatch.folder
"extensions": "js,png,svg,gif,jpeg,css"
}
}
}
Why use yalc?
See the FAQ.
Publishing a plugin
Note: If you're writing a plugin that is only useful for yourself or your company,
you might want to develop the plugin directly in the Studio (saves you from having to publish at all, and has improved hot-reload dev experience).
If the plugin is shared across multiple "private" studios: register an organization on npm and make sure your module is
prefixed with the organization scope, eg @your-company/plugin-name
.
Also; you cannot easily remove modules/versions from npm once published.
Take a good look at your package.json
to see that the fields in there makes sense to you,
and make sure there are no "secrets" (authorization tokens, API keys or similar) in the plugin directory -
anything not listed in .npmignore
will be part of the published module.
When you're ready to publish, run npm publish
(or yarn publish
if you prefer).
The prepublishOnly
task should kick in and compile the source files, then verify the built output to ensure it looks good.
If you have not published any modules to npm before, you will be asked to create a user first.
For an opinionated template for publication based on semantic-release, see semver-workflow preset
Upgrade from v1.x to v2
To upgrade a plugin that already uses @sanity/plugin-kit
1.x:
- Update
@sanity/plugin-kit
to version to 2.x in package.json
- Run:
npx @sanity/plugin-kit inject
- This will update package.json with new defaults
- Feel free to answer no to any file-overwrite prompts
- Inspect git diff to see what was changed
- Run:
npm install
- Run:
npm run build
- Fix any outstanding issues, if any
FAQ
Q: Do I have to use this for developing Sanity plugins?
A: Absolutely not! Make sure your Sanity plugin is ES6-compatible.
This package was created to make it easier to set up the build toolchain and prevent common mistakes.
If you know what you're doing and don't like any magic, roll your own thing! :)
Q: Why use yalc?
npm link & yarn link unfortunately can easily break the rules of hooks due
to the way packages are resolved using symlinks.
Yalc bypass this problem as it more closely resembles installing a dependency as normal.
Q: Do I have to use yalc?
A: No!
Feel free to use any variation of npm link
or yarn link
alongside npm run watch
for testing,
but beware that if you get errors from React along the lines of
Error: Invalid hook call. Hooks can only be called inside of the body of a function component.
This could happen for one of the following reasons:
- You might have mismatching versions of React and the renderer (such as React DOM)
- You might be breaking the Rules of Hooks
- You might have more than one copy of React in the same app
See https://reactjs.org/link/invalid-hook-call for tips about how to debug and fix this problem.
you probably have to revert to using yalc, or use npm pack
+ and install the resulting tzg-file.
Q: What appended with the Parcel recommendation?
At the time of writing (Nov 2022) the latest version of parcel (2.7) failed to build Sanity plugins.
The previous version (2.6) did not work with the latest version of TypeScript.
Pinning these versions was confusing and caused issues.
We also saw issues with modules using nested async imports.
As such, we decided to standardize plugins on the same build-tool used by Sanity studio, @sanity/pkg-utils.
Q: Why use @sanity/pkg-utils?
@sanity/pkg-utils is the build tool used to build the sanity
package. It is based on esbuild and rollup and sports an array of validation to ensure that package.json can build
both commonjs and ems packages that can be used in a variety of js runtimes.
Using this internal tool for plugins allows Sanity to more quickly address common build-related issues with plugins,
and aims to standardize how this is done thought the community.
Q: Can I use another build tool or change @sanity/pkg-utils configuration?
A: Yes!
Feel free to make any changes to package.config.ts
as is needed.
@sanity/plugin-sdk verify-package
output is only recommendations for defaults that has been tested to work in Sanity Studio.
Your plugin may have other needs.
You are also free to not use @sanity/pkg-utils at all; simply change your package.json build script, and disable any verification-steps
you don't care for with sanityPlugin.verifyPackage
.
CLI Help
$ npx @sanity/plugin-kit --help
Usage
$ plugin-kit [--help] [--debug] <command> [<args>]
These are common commands used in various situations:
init Create a new Sanity plugin
verify-package Verify that a Sanity plugin follows plugin-kit conventions
inject Inject plugin-kit complatible package config into an existing plugin directory
link-watch Recompile plugin automatically on changes and push to yalc
version Show the version of ${cliName} currently installed
Options
--silent Do not print info and warning messages
--verbose Log everything. This option conflicts with --silent
--debug Print stack trace on errors
--version Output the version number
--help Output usage information
Examples
$ plugin-kit init
$ plugin-kit verify-package
Configuration reference
Provide a sanityPlugin config in package.json (defaults shown):
{
"sanityPlugin": {
"linkWatch": {
"folder": "lib",
"command": "npm run watch",
"extensions": "js,png,svg,gif,jpeg,css"
}
},
"verifyPackage": {
"packageName": true,
"module": true,
"tsconfig": true,
"tsc": true,
"dependencies": true,
"rollupConfig": true,
"babelConfig": true,
"sanityV2Json": true,
"eslintImports": true,
"scripts": true,
"pkg-utils": true,
"nodeEngine": true
}
}
License
MIT © Espen Hovlandsdal and Sanity.io
Development
Test in another package
In one shell, run
npm link
npm run watch
In the package where you want to test plugin kit, run:
npm link @sanity/plugin-kit
Now you can run commands:
npx @sanity/plugin-kit verify-package
or use them in package.json scripts:
"verify": "plugin-kit verify-package"
Integration tests
npm run test
Run a single test-file
npm run test -- test/verify-package.test.ts
Update snapshots for a test
npm run test -- test/verify-package.test.ts --snapshot
Developing plugin kit
Release new version
Run "CI & Release" workflow.
Make sure to select the main branch and check "Release new version".
Semantic release will only release on configured branches, so it is safe to run release on any branch.