How to create a Netlify Deploy Preview with cache clear?

Question

With my Netlify site I can manually choose to trigger a deployment on my master branch and opt to clear the cache.

However I cannot find a way of doing this with my Deploy Preview branch.

I have made an npm package version change and Deploy Preview isn't picking up on my change. Instead it's restoring the existing node_modules:

How can I manually trigger a deployment of Deploy Preview with cache clear, or disable the restoration of node_modules when rebuilding a Deploy Preview branch?

I would also like to do this since I frequently encounter deploy errors when caching is used. — pat-s, Oct 25 '18 at 10:53
Note that this is now possible by choosing the `Clear cache and deploy site` option on a site's Deploys page. — Robin Métral, Mar 22 '20 at 17:22

score 2 · Accepted Answer · answered Jun 12 '18 at 15:06

There is no way for you to trigger a cache-cleared deploy preview, though Netlify's helpdesk can for you.

However, that shouldn't be needed. We intend to re-run npm install or yarn install if the checksum on /package.json or /yarn.lock changes:

https://github.com/netlify/build-image/blob/master/run-build-functions.sh#L54

How did you change the package version?

How to create a Netlify Deploy Preview with cache clear?

1 Answers1