hilja / pruner

Pruner

Will prune node_modules so your final Docker images is smaller. Cuts about 10 to 20 percent off. Comes handy if you’re dealing with limited resources or work at a scale of thousands of projects. Or you’re just obsessed with small deployments.

Install

This package is hosted in jsr.dev, but you can install it with your normal tools:

pnpm dlx jsr add -D @antti/pruner

It’s a single JavaScript file with no deps, so you can just copy it to your project if you don’t want to install it.

Usage

pnpm dlx @antti/pruner --path=node_modules/.pnpm
# Or
pnpm pruner --path=node_modules/.pnpm

Example usage in Dockerfile:

FROM node:lts-alpine3.19 AS base
RUN corepack enable
WORKDIR /usr/src/app
COPY pnpm-lock.yaml .
RUN pnpm fetch
COPY . .
RUN pnpm i --offline --frozen-lockfile
RUN pnpm build
RUN pnpm -F=foo --prod deploy /myapp/foo
# Run it as the last command step of the build step
RUN pnpm pruner --path=/myapp/foo/node_modules/.pnpm

# Enjoy slimmer image
FROM node:lts-alpine3.19 AS foo
COPY --from=base /myapp/foo /myapp/foo
WORKDIR /myapp/foo
CMD node build/server.js

Other packages

• npmprune (bash)
• node-prune (bash)