restructured the project to comply community guideline, for others check release note

internal/docker/label_parser.go

@@ -0,0 +1,78 @@
+package docker
+
+import (
+	"strings"
+
+	E "github.com/yusing/go-proxy/internal/error"
+	"gopkg.in/yaml.v3"
+)
+
+const (
+	NSProxy                    = "proxy"
+	ProxyAttributePathPatterns = "path_patterns"
+	ProxyAttributeNoTLSVerify  = "no_tls_verify"
+	ProxyAttributeMiddlewares  = "middlewares"
+)
+
+var _ = func() int {
+	RegisterNamespace(NSProxy, ValueParserMap{
+		ProxyAttributePathPatterns: YamlStringListParser,
+		ProxyAttributeNoTLSVerify:  BoolParser,
+	})
+	return 0
+}()
+
+func YamlStringListParser(value string) (any, E.NestedError) {
+	/*
+		- foo
+		- bar
+		- baz
+	*/
+	value = strings.TrimSpace(value)
+	if value == "" {
+		return []string{}, nil
+	}
+	var data []string
+	err := E.From(yaml.Unmarshal([]byte(value), &data))
+	return data, err
+}
+
+func YamlLikeMappingParser(allowDuplicate bool) func(string) (any, E.NestedError) {
+	return func(value string) (any, E.NestedError) {
+		/*
+			foo: bar
+			boo: baz
+		*/
+		value = strings.TrimSpace(value)
+		lines := strings.Split(value, "\n")
+		h := make(map[string]string)
+		for _, line := range lines {
+			parts := strings.SplitN(line, ":", 2)
+			if len(parts) != 2 {
+				return nil, E.Invalid("syntax", line).With("too many colons")
+			}
+			key := strings.TrimSpace(parts[0])
+			val := strings.TrimSpace(parts[1])
+			if existing, ok := h[key]; ok {
+				if !allowDuplicate {
+					return nil, E.Duplicated("key", key)
+				}
+				h[key] = existing + ", " + val
+			} else {
+				h[key] = val
+			}
+		}
+		return h, nil
+	}
+}
+
+func BoolParser(value string) (any, E.NestedError) {
+	switch strings.ToLower(value) {
+	case "true", "yes", "1":
+		return true, nil
+	case "false", "no", "0":
+		return false, nil
+	default:
+		return nil, E.Invalid("boolean value", value)
+	}
+}