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https://github.com/netbirdio/netbird.git
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36 lines
996 B
Go
36 lines
996 B
Go
package main
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import (
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"os"
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"strings"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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// setFlagsFromEnvVars reads and updates flag values from environment variables with prefix NB_
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func setFlagsFromEnvVars(cmd *cobra.Command) {
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flags := cmd.PersistentFlags()
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flags.VisitAll(func(f *pflag.Flag) {
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newEnvVar := flagNameToEnvVar(f.Name, "NB_")
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value, present := os.LookupEnv(newEnvVar)
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if !present {
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return
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}
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err := flags.Set(f.Name, value)
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if err != nil {
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log.Infof("unable to configure flag %s using variable %s, err: %v", f.Name, newEnvVar, err)
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}
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})
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}
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// flagNameToEnvVar converts flag name to environment var name adding a prefix,
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// replacing dashes and making all uppercase (e.g. setup-keys is converted to NB_SETUP_KEYS according to the input prefix)
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func flagNameToEnvVar(cmdFlag string, prefix string) string {
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parsed := strings.ReplaceAll(cmdFlag, "-", "_")
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upper := strings.ToUpper(parsed)
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return prefix + upper
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}
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