switch to go vendoring

vendor/github.com/gookit/goutil/internal/comfunc/comfunc.go

@@ -0,0 +1,79 @@
+package comfunc
+
+import (
+	"os"
+	"regexp"
+	"strings"
+)
+
+// Environ like os.Environ, but will returns key-value map[string]string data.
+func Environ() map[string]string {
+	envList := os.Environ()
+	envMap := make(map[string]string, len(envList))
+
+	for _, str := range envList {
+		nodes := strings.SplitN(str, "=", 2)
+
+		if len(nodes) < 2 {
+			envMap[nodes[0]] = ""
+		} else {
+			envMap[nodes[0]] = nodes[1]
+		}
+	}
+	return envMap
+}
+
+// parse env value, allow:
+//
+//	only key 	 - "${SHELL}"
+//	with default - "${NotExist | defValue}"
+//	multi key 	 - "${GOPATH}/${APP_ENV | prod}/dir"
+//
+// Notice:
+//
+//	must add "?" - To ensure that there is no greedy match
+//	var envRegex = regexp.MustCompile(`\${[\w-| ]+}`)
+var envRegex = regexp.MustCompile(`\${.+?}`)
+
+// ParseEnvVar parse ENV var value from input string, support default value.
+//
+// Format:
+//
+//	${var_name}            Only var name
+//	${var_name | default}  With default value
+//
+// Usage:
+//
+//	comfunc.ParseEnvVar("${ APP_NAME }")
+//	comfunc.ParseEnvVar("${ APP_ENV | dev }")
+func ParseEnvVar(val string, getFn func(string) string) (newVal string) {
+	if !strings.Contains(val, "${") {
+		return val
+	}
+
+	// default use os.Getenv
+	if getFn == nil {
+		getFn = os.Getenv
+	}
+
+	var name, def string
+	return envRegex.ReplaceAllStringFunc(val, func(eVar string) string {
+		// eVar like "${NotExist|defValue}", first remove "${" and "}", then split it
+		ss := strings.SplitN(eVar[2:len(eVar)-1], "|", 2)
+
+		// with default value. ${NotExist|defValue}
+		if len(ss) == 2 {
+			name, def = strings.TrimSpace(ss[0]), strings.TrimSpace(ss[1])
+		} else {
+			def = eVar // use raw value
+			name = strings.TrimSpace(ss[0])
+		}
+
+		// get ENV value by name
+		eVal := getFn(name)
+		if eVal == "" {
+			eVal = def
+		}
+		return eVal
+	})
+}