opnsense-exporter/vendor/github.com/alecthomas/kingpin/v2/envar.go

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package kingpin
import (
"os"
"regexp"
)
var (
envVarValuesSeparator = "\r?\n"
envVarValuesTrimmer = regexp.MustCompile(envVarValuesSeparator + "$")
envVarValuesSplitter = regexp.MustCompile(envVarValuesSeparator)
)
type envarMixin struct {
envar string
noEnvar bool
}
func (e *envarMixin) HasEnvarValue() bool {
return e.GetEnvarValue() != ""
}
func (e *envarMixin) GetEnvarValue() string {
if e.noEnvar || e.envar == "" {
return ""
}
return os.Getenv(e.envar)
}
func (e *envarMixin) GetSplitEnvarValue() []string {
envarValue := e.GetEnvarValue()
if envarValue == "" {
return []string{}
}
// Split by new line to extract multiple values, if any.
trimmed := envVarValuesTrimmer.ReplaceAllString(envarValue, "")
return envVarValuesSplitter.Split(trimmed, -1)
}