Principle:Cypress io Cypress Monorepo Build Orchestration
| Knowledge Sources | |
|---|---|
| Domains | Build, Monorepo |
| Last Updated | 2026-02-12 00:00 GMT |
Overview
A dependency-graph-aware build orchestration mechanism that compiles packages in topological order, ensuring each package's dependencies are built before it is compiled.
Description
Building a monorepo with inter-package dependencies requires executing build commands in the correct order. If package A depends on package B, B must be built first. Lerna handles this via lerna run build --stream, which uses Nx under the hood for task graph analysis.
The Nx configuration specifies that build tasks depend on their upstream build tasks ("^build" in targetDefaults), ensuring topological ordering. This enables parallel execution of independent packages while maintaining correct ordering for dependent ones.
Usage
Use this principle when compiling the Cypress monorepo after making changes, or when setting up the development environment initially.
Theoretical Basis
Build Orchestration:
nx.json: { targetDefaults: { build: { dependsOn: ["^build"] } } }
This means: before building package X, build all packages X depends on.
Execution Order (simplified):
Level 0: @packages/root, @packages/types (no deps)
Level 1: @packages/ts, @packages/errors (depends on root)
Level 2: @packages/config, @packages/network (depends on ts)
Level 3: @packages/server, @packages/driver (depends on config, etc.)
Level N: cli (depends on many packages)