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VitestDedup

Installation

Requirements

Section titled “Requirements”
  • Node 20 or later (the vitest-dedup command is a launcher that needs it).
  • A prebuilt binary platform: macOS (arm64, x64), Linux (arm64, x64; glibc and musl), or Windows (arm64, x64). On other platforms, build from source with cargo install --git https://github.com/figueiredoluiz/vitest-dedup.

Install into a project

Section titled “Install into a project”
Terminal window
npm install --save-dev vitest-dedup

Installation pulls one prebuilt binary for your platform through optionalDependencies. There is no postinstall script, so nothing is downloaded, compiled, or executed at install time.

Run once, without installing

Section titled “Run once, without installing”
Terminal window
npx vitest-dedup .

Verifying what you installed

Section titled “Verifying what you installed”

Packages are published from the repository’s release workflow with npm trusted publishing, so npm audit signatures verifies them. Release archives carry SHA-256 checksums, keyless Sigstore signature bundles, and a build provenance attestation.

Pointing the launcher elsewhere

Section titled “Pointing the launcher elsewhere”

VITEST_DEDUP_BINARY points the launcher at a specific executable, such as a local build from source. The launcher execs that binary and forwards its exit code unchanged.