Migrate npm to pnpm

migrate-npm-to-pnpm.md

Install pnpm

https://pnpm.io/installation#using-corepack

$ corepack enable
$ corepack prepare pnpm@latest --activate
$ pnpm --version

package-lock.json to pnpm-lock.yaml

https://pnpm.io/cli/import

1. Remove node_modules
2. [Optional] Create pnpm-workspace.yaml if you use workspaces
3. Run pnpm import
4. Remove package-lock.json
5. Run pnpm install
6. Replace all npm run xxx commands to pnpm run xxx

"engine" on package.json

https://pnpm.io/package_json#engines

If you use the field, you should change it.

CI

npm ci alternative

$ CI=1 pnpm install
$ pnpm install --frozen-lockfile

GitHub Actions

https://pnpm.io/continuous-integration#github-actions

GitLab CI

https://pnpm.io/continuous-integration#gitlab-ci

Others

• User-defined pre and post scripts aren't run https://pnpm.io/cli/run#differences-with-npm-run