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Development

This page may include outdated information.

Architecture

The OpenUPM service is composed of below sub-systems:

• Public upm registry
• *Automatic build pipelines
• *Website next
• *Website backend (API)
• *Package curated list
• OpenUPM-CLI command-line tool

Entries with * prefix are located in the main repository.

Directory Structure

.
├── src          # backend
│   ├── node       # node.js server
│   ├── shared     # shared code between node and client
├── data         # linked data folder
├── docs         # website frontend (vuepress)
└── test        # unit tests

Public UPM Registry

OpenUPM uses a custom verdaccio to host the registry. Though verdaccio is the most popular open-source project to set up a private npm registry, most deployments served a very limited user base or for the testing purpose that doesn't care about performance much. OpenUPM try to solve quite a few issues related to the cluster deployment. Before these PRs get merged, OpenUPM will stay with the custom build:

• S3 storage with CDN #250
• Stateless s3 storage for cluster deployment #1595, #1459
• Commands npm publish -f and npm unpublish return 404 #1435
• Wrong timestamp for old search API #1597

Since OpenUPM has it's own way to organize the package list, the verdaccio website and API endpoints are disabled (headless mode).

Automatic Build Pipelines

OpenUPM watches the package curated list regularly detects new contents and uses the job queue to build packages through Azure Pipelines.

Cronjob

OpenUPM uses pm2 cron feature to run cronjobs.

Job	Description	GitHub Reset API	GitHub GraphQL API
add-build-package-job	add build-pkg to the job queue.
fetch-package-extra	fetch package README, stars, ogimage	n	2n
aggregate-package-extra	aggregate package extra
update-recent-packages	update recent updated packages
fetch-site-info	fetch repo stars	1
update-feeds	update RSS feeds

Job Queue

OpenUPM uses Bee-Queue to manage the job queue.

Job	Description	GitHub API
build-pkg:<pkg>	fetch repo info and create build-rel jobs for valid Git tags	0
build-rel:<pkg>:<ver>	build pkg@version via Azure Pipelines	0

GitHub Rate Limit

Print the rate limit status.

yarn gh:ratelimit

Website Frontend

OpenUPM uses VuePress - a static website generator to develop website next.

source env.sh
yarn docs:dev

To enable webpack bundle analyzer:

WEBPACK_BUNDLE_ANALYZER=1 yarn docs:build

Website Backend

OpenUPM uses Express to develop website backend (API).

yarn server:dev

Package Curated List

OpenUPM uses git as a database to maintain the package curated list. Each package is described as a YAML file.

i18n

The website supports two regions with different configurations:

Region	Language	Fallback Language
US	en-US	n/a
CN	zh-CN	en-US

• The documentation level translations are located at docs/zh.

• The component level translations are located at docs/.vuepress/locales. i18n-ally is powerful i18n extensions for VS Code to edit locale files.

• To develop the CN region:

  VITE_OPENUPM_REGION=cn npm run docs:dev