Lerna vs manypkg

Lerna is a free, open-source build system for managing and publishing JavaScript and TypeScript packages from one repository. It runs commands across projects in an efficient order and can parallelize tasks, cache results, and distribute work across machines. When task files and terminal output are already in its computation cache, Lerna can restore them instead of rerunning the task. It manages package versioning and npm publishing, with fixed or independent versioning workflows, and includes an interactive graph for viewing workspace structure and dependencies. Lerna uses Nx to identify workspace packages and dependencies and to run scripts with parallelism, caching, and distribution. It supports npm, yarn, pnpm, and bun; dependency installation and linking should be handled through those package managers’ workspace features. Nx Cloud has a free Hobby plan, a Team plan at $29 a month, and Enterprise with custom pricing. For closed-source projects, Nx Cloud provides the first 500 computation hours per month free, then charges $1 per computation hour. Its Hobby plan includes 50,000 credits monthly, five contributors, 10 concurrent CI connections, and community support.

manypkg is a command-line linter for package.json files in Yarn, npm, pnpm, Bun, and Lerna monorepos. It checks consistency across packages, including matching external dependency ranges, internal dependency ranges that include the referenced package version, and alphabetical ordering of dependencies. Other checks cover peer and development dependency relationships, root production dependencies, duplicate dependency types, package names, and repository fields. The `manypkg check` command runs repository checks, logs errors, and exits with a code. When a problem can be corrected automatically, `manypkg fix` can apply a fix. The CLI also runs package scripts with `manypkg run`, selecting a package by partial name or directory, and runs a command across packages with `manypkg exec`. The root package.json can configure ignored rules, the default branch, and workspace protocol behavior; the protocol setting defaults to `allow`. Installation is documented with `yarn add @manypkg/cli`. The tool is free and licensed under MIT. Thinkmill is its maker, based in Sydney, Australia; listed platforms are Linux, macOS, and Windows.