chore: allow turbo remote cache write only on AWS Codebuild

[trivikr]

Issue

• Internal JS-5438
• Long-term fix for Duplicate File awsSdkSigV4AConfigSelector.d.ts breaking deployments #6464

Description

Allows Turborepo remote cache write only on AWS Codebuild.

• Turborepo docs https://turbo.build/repo/docs/reference/system-environment-variables
• Environment variable CODEBUILD_BUILD_ARN is used for detecting CodeBuild in userland library ci-info https://github.com/watson/ci-info/blob/3e1488e98680f1f776785fe8708a157b7f00e568/vendors.json#L19-L23

This will ensure that any developments outside of CodeBuild environments, like developer workspaces, do not pollute the remote cache.

Testing

repository

Verified that updated local cache from developer workspace is not uploaded to remote cache.

$ make turbo-clean

$ yarn build:all
...
 Tasks:    473 successful, 473 total
Cached:    473 cached, 473 total
  Time:    25.822s >>> FULL TURBO

Done in 26.41s.

$ sed -i '$s/}/,  "foo":"bar"\n}/' clients/client-acm/package.json

$ git diff
diff --git a/clients/client-acm/package.json b/clients/client-acm/package.json
index 9651073052a..adec6dee759 100644
--- a/clients/client-acm/package.json
+++ b/clients/client-acm/package.json
@@ -99,4 +99,5 @@
     "url": "https://github.com/aws/aws-sdk-js-v3.git",
     "directory": "clients/client-acm"
   }
+,  "foo":"bar"
 }

$ yarn build:all
...
@aws-sdk/client-acm:build: cache miss, executing 9bea6a701716bcc5
 WARNING  Remote cache is read-only, skipping upload
...
 Tasks:    473 successful, 473 total
Cached:    472 cached, 473 total
  Time:    24.255s

It uses local cache on re-run

$ yarn build:all
...
 Tasks:    473 successful, 473 total
Cached:    473 cached, 473 total
  Time:    23.961s >>> FULL TURBO

Simulated by setting CODEBUILD_BUILD_ARN that Remote Cache will be populated

$ make turbo-clean

$ CODEBUILD_BUILD_ARN="blah" yarn build:all
...
@aws-sdk/client-acm:build: cache miss, executing 9bea6a701716bcc5
...
 Tasks:    473 successful, 473 total
Cached:    472 cached, 473 total
  Time:    24.657s 
...

$ make turbo-clean

$ yarn build:all
...
@aws-sdk/client-acm:build: cache hit, suppressing logs 9bea6a701716bcc5
...
 Tasks:    473 successful, 473 total
Cached:    473 cached, 473 total
  Time:    24.608s >>> FULL TURBO

node REPL

$ node
Welcome to Node.js v18.20.2.
Type ".help" for more information.
> obj = {...(!process.env.CODEBUILD_BUILD_ARN && { TURBO_REMOTE_CACHE_READ_ONLY: "1" })}
{ TURBO_REMOTE_CACHE_READ_ONLY: '1' }

$ CODEBUILD_BUILD_ARN="blah" node
Welcome to Node.js v18.20.2.
Type ".help" for more information.
> obj = {...(!process.env.CODEBUILD_BUILD_ARN && { TURBO_REMOTE_CACHE_READ_ONLY: "1" })}
{}

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[trivikr]

Environment variables in build environments: https://docs.aws.amazon.com/codebuild/latest/userguide/build-env-ref-env-vars.html