netlify-yarn-restore

#!/bin/sh
YARN_CACHE="./node_modules/yarn-cache"

restore_deps() {
    PACKAGES=$@

    for PKG in $PACKAGES
    do
        PKG_CACHE="$YARN_CACHE/$PKG"
        if [ -d $PKG_CACHE ];
        then
            mv $PKG_CACHE ./$PKG/node_modules
            echo "Restored node modules for $PKG"
        else
            echo "Unable to restore node modules for $PKG"
        fi
    done
}

restore_deps `jq -r '.workspaces|join(" ")' < package.json`

[ -d "$YARN_CACHE" ] && rm -r "$YARN_CACHE"