Developing in a Large Monorepo
summary
A Microsoft TypeScript monorepo of ~150 internal npm packages and over a million lines supports ~300 developers; the concrete claim is that using yarn workspaces plus Lerna with package hoisting cuts install time from ~20 to 6 minutes and reduces CI/build times by about 5x. The repo relies on node module resolution, Lerna’s dependency-ordered runs and scoping, and workspace/no-hoist tweaks to publish, version and orchestrate cross-package builds reliably.
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chapters (18)
- 0:00Introduction
- 1:18About me
- 2:10Microsoft Search
- 2:51People Card
- 4:35People Card Development
- 5:21People Card Scenario
- 7:28Monorepo
- 10:02JavaScript Packages
- 10:32How Packages are Used
- 11:31Node Module Resolution
- 14:35Package Management Tools
- 16:09Orchestration Tools
- 16:55Learner
- 18:33Example
- 19:47scoping
- 21:27release management
- 22:22community adoption
- 23:00conclusion
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