60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package memlimit
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import (
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"fmt"
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"os"
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"reflect"
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"strings"
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)
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const (
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envAUTOMEMLIMIT_EXPERIMENT = "AUTOMEMLIMIT_EXPERIMENT"
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)
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// Experiments is a set of experiment flags.
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// It is used to enable experimental features.
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//
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// You can set the flags by setting the environment variable AUTOMEMLIMIT_EXPERIMENT.
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// The value of the environment variable is a comma-separated list of experiment names.
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//
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// The following experiment names are known:
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//
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// - none: disable all experiments
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// - system: enable fallback to system memory limit
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type Experiments struct {
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// System enables fallback to system memory limit.
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System bool
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}
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func parseExperiments() (Experiments, error) {
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var exp Experiments
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// Create a map of known experiment names.
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names := make(map[string]func(bool))
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rv := reflect.ValueOf(&exp).Elem()
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rt := rv.Type()
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for i := 0; i < rt.NumField(); i++ {
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field := rv.Field(i)
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names[strings.ToLower(rt.Field(i).Name)] = field.SetBool
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}
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// Parse names.
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for _, f := range strings.Split(os.Getenv(envAUTOMEMLIMIT_EXPERIMENT), ",") {
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if f == "" {
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continue
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}
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if f == "none" {
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exp = Experiments{}
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continue
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}
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val := true
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set, ok := names[f]
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if !ok {
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return Experiments{}, fmt.Errorf("unknown AUTOMEMLIMIT_EXPERIMENT %s", f)
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}
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set(val)
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}
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return exp, nil
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}
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