temp commit

vendor/gopkg.in/alecthomas/kingpin.v2/envar.go

@@ -0,0 +1,45 @@
+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 {
+	values := make([]string, 0)
+
+	envarValue := e.GetEnvarValue()
+	if envarValue == "" {
+		return values
+	}
+
+	// Split by new line to extract multiple values, if any.
+	trimmed := envVarValuesTrimmer.ReplaceAllString(envarValue, "")
+	for _, value := range envVarValuesSplitter.Split(trimmed, -1) {
+		values = append(values, value)
+	}
+
+	return values
+}