split setting.go to multiple files (#6154)

* split setting.go to multiple files

* fix lint

modules/setting/markup.go

@@ -0,0 +1,66 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package setting
+
+import (
+	"regexp"
+	"strings"
+
+	"code.gitea.io/gitea/modules/log"
+)
+
+// ExternalMarkupParsers represents the external markup parsers
+var (
+	ExternalMarkupParsers []MarkupParser
+)
+
+// MarkupParser defines the external parser configured in ini
+type MarkupParser struct {
+	Enabled        bool
+	MarkupName     string
+	Command        string
+	FileExtensions []string
+	IsInputFile    bool
+}
+
+func newMarkup() {
+	extensionReg := regexp.MustCompile(`\.\w`)
+	for _, sec := range Cfg.Section("markup").ChildSections() {
+		name := strings.TrimPrefix(sec.Name(), "markup.")
+		if name == "" {
+			log.Warn("name is empty, markup " + sec.Name() + "ignored")
+			continue
+		}
+
+		extensions := sec.Key("FILE_EXTENSIONS").Strings(",")
+		var exts = make([]string, 0, len(extensions))
+		for _, extension := range extensions {
+			if !extensionReg.MatchString(extension) {
+				log.Warn(sec.Name() + " file extension " + extension + " is invalid. Extension ignored")
+			} else {
+				exts = append(exts, extension)
+			}
+		}
+
+		if len(exts) == 0 {
+			log.Warn(sec.Name() + " file extension is empty, markup " + name + " ignored")
+			continue
+		}
+
+		command := sec.Key("RENDER_COMMAND").MustString("")
+		if command == "" {
+			log.Warn(" RENDER_COMMAND is empty, markup " + name + " ignored")
+			continue
+		}
+
+		ExternalMarkupParsers = append(ExternalMarkupParsers, MarkupParser{
+			Enabled:        sec.Key("ENABLED").MustBool(false),
+			MarkupName:     name,
+			FileExtensions: exts,
+			Command:        command,
+			IsInputFile:    sec.Key("IS_INPUT_FILE").MustBool(false),
+		})
+	}
+}