60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
package config
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import (
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"flag"
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"os"
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"strconv"
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"time"
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)
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const (
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defaultCheckTimeout = 500 * time.Millisecond
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defaultAttemptCount = 20
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)
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func ConfigureFlags(cfg *Nurse) *flag.FlagSet {
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set := flag.NewFlagSet("nurse", flag.ContinueOnError)
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set.DurationVar(
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&cfg.CheckTimeout,
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"check-timeout",
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LookupEnvOr("NURSE_CHECK_TIMEOUT", defaultCheckTimeout, time.ParseDuration),
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"Timeout when running checks",
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)
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set.UintVar(
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&cfg.CheckAttempts,
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"check-attempts",
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LookupEnvOr("NURSE_CHECK_ATTEMPTS", defaultAttemptCount, parseUint),
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"Number of attempts for a check",
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)
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return set
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}
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//nolint:ireturn // false positive
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func LookupEnvOr[T any](envKey string, fallback T, parse func(envVal string) (T, error)) T {
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envVal := os.Getenv(envKey)
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if envVal == "" {
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return fallback
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}
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if parsed, err := parse(envVal); err != nil {
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return fallback
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} else {
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return parsed
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}
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}
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//nolint:ireturn // false positive
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func Identity[T any](in T) (T, error) {
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return in, nil
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}
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func parseUint(val string) (uint, error) {
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parsed, err := strconv.ParseUint(val, 10, 32)
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if err != nil {
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return 0, err
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}
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return uint(parsed), nil
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}
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