typescript-monorepo-toolkit

CLI tool to automatically setup typescript project references for yarn workspaces monorepos and other tasks

It can inject the appropriate tsconfig.references for all of the packages in a yarn workspace, and also help you change rootDir and outDir across all of the packages

Background / Motivation:

• https://github.com/thi-ng/ 100+ packages monorepo that i want to move to project refs
• #32028 Build-Free Editing for Project References
• Infer project references from common monorepo patterns / tools #25376

How to use

npx typescript-monorepo-toolkit inject-refs ../path-to/yarn-project-root

For debug info

DEBUG=typescript-monorepo-toolkit npx typescript-monorepo-toolkit inject-refs ../path-to/yarn-project-root

Usage:  [options] [command]

Options:
  -V, --version                                 output the version number
  -p, --tsconfig-path <tsconfigpath>            Use alterative config path inside the package. eg: test/tsconfig.json (default: "tsconfig.json")
  -h, --help                                    output usage information

Commands:
  inject-refs [options] <yarn-project-root>              Inject the appropriate tsconfig references based on yarn workspaces dependency graph
  set-outDir <yarn-project-root> [newOutDir]             Set the compilerOptions.outDir in all of the packages. omit new value to delete
  set-rootDir <yarn-project-root> [newRootDir]           Set the compilerOptions.rootDir in all of the packages. omit new value to delete
  set-extend <yarn-project-root> [extendedTsconfigPath]  Set the extends entry in all of the tsconfigs. omit new value to delete

How does it work

yarn workspaces info command has all the info we need.

The tsconfig.json manipulation is done using recast, as tsconfig.json is not really JSON, so we can keep the comments. Unfortunately recast changes some of the formatting of the file.

This tool might break your tsconfigs Please run this tool on a clean git state, and inspect the diff

Future possible improvements

• Become obsolete when #25376 is fixed
• Find a good name
• Support tsconfig.test.json and similar patterns
• Support lerna/other monorepo tools that can provider us with the dependency graph

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