mirror of
https://github.com/Crocmagnon/fatcontext.git
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48 lines
747 B
Markdown
48 lines
747 B
Markdown
# foreshadow
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`foreshadow` is a Go linter which detects un-shadowed contexts in loops.
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They can lead to performance issues, as documented here: https://gabnotes.org/fat-contexts/
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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) // "context not shadowed 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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