Dockerfile: unexposed variable declarations
Open
Nobody has claimed this yet.
area/dockerfile
kind/enhancement
- Dominant language
- Go
- Stars
- 10.3k
- Forks
- 1.5k
- Avg merge
- 1d 23h
- Merged PRs (30d)
- 48
Description
Docker has ARG, and has ENV, the issue I have with these is that they exposed to users. Sometimes you just want an internal variable that can be passed around to multiple commands, but not exposed to the user. Personally like ARG I don't really see this needing to be baked into the image. Suggested keyword would be VAR.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no files, tests, or entry points. Start by tracing how Dockerfile ARG and ENV declarations are parsed and represented in BuildKit, then determine the design and compatibility requirements for a new VAR keyword; done means the proposed internal-variable behavior is implemented and covered by tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- docker, dockerfile
- Domain
- build-system, devops
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100