Storing node_modules directory in cache causes a number of issues, such as increase in the laid out node_modules tree and also in some cases break module resolution. This is because modules are not hoisted correctly when running `yarn install`. Example of related failures https://app.circleci.com/pipelines/github/angular/angular/30441/workflows/c1a16135-f5c9-478d-a298-d720c6657d52/jobs/952138 A better cache strategy would be to save yarn cache, more information can be found in https://circleci.com/docs/2.0/caching/#yarn-node. PR Close #41467
Encryption
Based on https://github.com/circleci/encrypted-files
In the CircleCI web UI, we have a secret variable called KEY
https://circleci.com/gh/angular/angular/edit#env-vars
which is only exposed to non-fork builds
(see "Pass secrets to builds from forked pull requests" under
https://circleci.com/gh/angular/angular/edit#advanced-settings)
We use this as a symmetric AES encryption key to encrypt tokens like a GitHub token that enables publishing snapshots.
To create the github_token file, we take this approach:
- Find the angular-builds:token in the internal pw database
- Go inside the CircleCI default docker image so you use the same version of openssl as we will at runtime:
docker run --rm -it circleci/node:10.12
- echo "https://[token]:@github.com" > credentials
- openssl aes-256-cbc -e -in credentials -out .circleci/github_token -k $KEY
- If needed, base64-encode the result so you can copy-paste it out of docker:
base64 github_token