mirror of
https://github.com/Crocmagnon/fatcontext.git
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62 lines
1.3 KiB
Markdown
62 lines
1.3 KiB
Markdown
# fatcontext
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[](https://pkg.go.dev/github.com/Crocmagnon/fatcontext)
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[](https://goreportcard.com/report/github.com/Crocmagnon/fatcontext)
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`fatcontext` is a Go linter which detects potential fat contexts in loops or function literals.
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They can lead to performance issues, as documented here: https://gabnotes.org/fat-contexts/
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## Installation / usage
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`fatcontext` is available in `golangci-lint` since v1.58.0.
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```bash
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go install github.com/Crocmagnon/fatcontext/cmd/fatcontext@latest
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fatcontext ./...
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```
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There are no specific configuration options or custom command-line flags.
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## Example
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```go
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package main
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import "context"
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func ok() {
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ctx := context.Background()
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for i := 0; i < 10; i++ {
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ctx := context.WithValue(ctx, "key", i)
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_ = ctx
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}
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}
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func notOk() {
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ctx := context.Background()
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for i := 0; i < 10; i++ {
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ctx = context.WithValue(ctx, "key", i) // "nested context in loop"
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_ = ctx
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}
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}
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```
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## Development
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Setup pre-commit locally:
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```bash
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pre-commit install
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```
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Run tests & linter:
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```bash
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make lint test
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```
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To release, just publish a git tag:
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```bash
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git tag -a v0.1.0 -m "v0.1.0"
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git push --follow-tags
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```
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