rust-lang / rust-lang/rust-clippy
Cargo.toml dependencies: avoid caret requirements
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- Dominant language
- Rust
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Description
What it does
Hello,
It would be nice to have a lint that highlights the presence of dependencies having the version specified with a ^ (caret) in the Cargo.toml. For example foo="^1.2.3".
As for Cargo docs:
Leaving off the caret is a simplified equivalent syntax to using caret requirements. While caret requirements are the default, it is recommended to use the simplified syntax when possible.
Advantage
This lint helps in having a uniform Cargo.toml where simplified syntax and explicit carets are not mixed, following Cargo docs suggestion.
Drawbacks
None I am aware of
Example
[dependencies]
foo="^1.2.3"
bar="9.8.7"
Could be written as:
[dependencies]
foo="1.2.3"
bar="9.8.7"
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 requested lint concerns caret-version dependencies in Cargo.toml, with the Cargo caret-requirements documentation as the reference. Start by locating Clippy's existing dependency or version-related lint entry points and tests; done means caret requirements are flagged while equivalent simplified versions remain valid.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100