(aws-lambda-nodejs): Support Bun 1.2 text lockfile

[blimmer]

Describe the feature

With Bun 1.2, the default lockfile produced is a text-based lockfile (bun.lock) instead of the binary (bun.lockb). The Bun 1.2 release blog post provides context on this change.

TLDR; bun should be identified by either bun.lockb or bun.lock.

Use Case

Newer bun users will produce the bun.lock file, not bun.lockb. Our current implementation will not identify this file during bundling.

Proposed Solution

Currently, we only pay attention to bun.lockb

aws-cdk/packages/aws-cdk-lib/aws-lambda-nodejs/lib/package-manager.ts

Line 15 in 6b9e47a

BUN = 'bun.lockb',

As noted in the release notes, bun will support bun.lockb and bun.lock for the foreseeable future. This will require a refactor in our existing logic because there's currently a 1:1 relationship between a package manager and its lockfile.

Additionally, we'll want to bump the bun version in the Dockerfile to >= 1.2

aws-cdk/packages/aws-cdk-lib/aws-lambda-nodejs/lib/Dockerfile

Lines 12 to 13 in 6b9e47a

	# Install bun
	RUN npm install --global bun@1.1.30

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.177.0

Environment details (OS name and version, etc.)

MacOS

[pahud]

Yes we should consider this support. Thank you for your PR!