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https://github.com/traefik/traefik
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27 lines
622 B
Go
27 lines
622 B
Go
package recursion
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import (
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"context"
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"fmt"
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"slices"
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"strings"
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)
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type stackType int
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const (
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stackKey stackType = iota
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)
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func CheckRecursion(ctx context.Context, itemType, itemName string) (context.Context, error) {
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currentStack, ok := ctx.Value(stackKey).([]string)
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if !ok {
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currentStack = []string{}
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}
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name := itemType + ":" + itemName
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if slices.Contains(currentStack, name) {
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return ctx, fmt.Errorf("could not instantiate %s %s: recursion detected in %s", itemType, itemName, strings.Join(append(currentStack, name), "->"))
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}
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return context.WithValue(ctx, stackKey, append(currentStack, name)), nil
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}
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