CI Cannot find module 'typescript'

[fyangstudio]

Error:
Cannot find module 'typescript'
with [email protected] in CI:

https://travis-ci.com/github/raxjs/rax-vscode-extensions/builds/170236677

[email protected] is ok.

[ljharb]

That doesn’t make any sense to me; 2.21.0 unconditionally required typescript (#1805), but 2.21.1 only does so when encountering typescript nodes.

Can you share the code it’s erroring on?

[fyangstudio]

It's happened in travis CI env.
It's works OK and no error occurred in my local development env as well.

I use the same Node and NPM version, with same command travis CI env failed, local development env is OK.

Code:
https://unpkg.com/browse/[email protected]/rules/base.js

[ljharb]

This line is unnecessary (the local one is used), but otherwise nothing looks out of place, and I can't reproduce it locally.

(I'm not sure why npm run setup is so abysmally slow, it seems to take longer than most lerna monorepos I've used)

Have you tried deleting all your travis-ci caches, and then rerunning the failed builds?

[fyangstudio]

It's seems good, when i remove travis-ci caches.
Maybe this issue is caused by travis-ci caches. thx