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deploy-vercel.md

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Vercel

How to deploy a monorepo on Vercel ?

Vercel supports it natively, so there's pretty much nothing to do.

Tip: if you are using corepack, you must set the environment variable ENABLE_EXPERIMENTAL_COREPACK=1

Install command

On vercel, override the Install command with:

yarn install --immutable --inline-builds

Tip: 'immutable' to respect the yarn.lock file, 'inline-builds' to display errors during the link step (rather than saving into /tmp/xfs... log file)

Adventurous users: it's possible to speed up the install process by playing with those environment variables:

Env Description
YARN_CACHE_FOLDER=../../node_modules/.cache/yarn Store yarn cache into a vercel one to speed up install
YARN_CACHE_FOLDER=./.next/cache/yarn Store yarn cache in a vercel one for nextjs apps
PRISMA_SKIP_POSTINSTALL_GENERATE=true Do not run prisma generate (handled in nextjs-app postinstall)
HUSKY=0 Prevent husky to install hooks

ie YARN_CACHE_FOLDER=../../node_modules/.cache/yarn PRISMA_SKIP_POSTINSTALL_GENERATE=true PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD=1 HUSKY=0 yarn install --immutable

How to from the vercel ui

  1. Select the app

  2. Choose the name

  3. (Option) To speed up install step and allow yarn 2 cache strategy till it's supported natively by Vercel, use a workaround by overriding install step with YARN_CACHE_FOLDER=./.next/cache/yarn-cache yarn install.