initial

gotemplate

@@ -0,0 +1,14 @@
+package lang
+
+type language struct {
+	Code        string
+	Description string
+}
+
+var Languages []language
+
+func init() {
+	{{range .Items}}
+	Languages = append(Languages, language{Code: "{{.Lang}}", Description: "{{.Description}}"})
+	{{end}}
+}

main.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"log"
+	"os"
+	"strings"
+	"text/template"
+)
+
+// wget http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
+
+const (
+	inFilename      = "language-subtag-registry"
+	outJSONFilename = "json/language.json"
+	outGoFilename   = "lang/language.go"
+)
+
+type Item struct {
+	Lang        string `json:"lang"`
+	Description string `json:"description"`
+}
+
+func main() {
+	f, e := os.Open(inFilename)
+	if e != nil {
+		log.Fatal(e.Error())
+	}
+	scanner := bufio.NewScanner(f)
+	items := []*Item{}
+	for scanner.Scan() {
+		if scanner.Text() == "%%" {
+			item := new(Item)
+			scanner.Scan()
+			if scanner.Text() == "Type: language" {
+				for !strings.HasPrefix(scanner.Text(), "Subtag:") {
+					scanner.Scan()
+				}
+				if strings.HasPrefix(scanner.Text(), "Subtag:") {
+					ss := strings.Split(scanner.Text(), ": ")
+					item.Lang = strings.Trim(ss[1], " ")
+					if len(item.Lang) > 2 {
+						continue
+					}
+				}
+				for !strings.HasPrefix(scanner.Text(), "Description:") {
+					scanner.Scan()
+				}
+				if strings.HasPrefix(scanner.Text(), "Description:") {
+					ss := strings.Split(scanner.Text(), ": ")
+					item.Description = strings.Trim(ss[1], " ")
+					scanner.Scan()
+					if strings.HasPrefix(scanner.Text(), "  ") {
+						item.Description += strings.TrimPrefix(scanner.Text(), " ")
+					}
+				}
+				items = append(items, item)
+			}
+
+		}
+	}
+	if e := f.Close(); e != nil {
+		log.Fatal(e.Error())
+	}
+	jw, e := os.Create(outJSONFilename)
+	if e != nil {
+		log.Fatal(e.Error())
+	}
+	if e := json.NewEncoder(jw).Encode(items); e != nil {
+		log.Fatal(e.Error())
+	}
+	if e := jw.Close(); e != nil {
+		log.Fatal(e.Error())
+	}
+	gw, e := os.Create(outGoFilename)
+	if e != nil {
+		log.Fatal(e.Error())
+	}
+	gotmpl := template.Must(template.ParseFiles("gotemplate"))
+	ctx := make(map[string]interface{})
+	ctx["Items"] = items
+	if e := gotmpl.Execute(gw, ctx); e != nil {
+		log.Fatal(e.Error())
+	}
+	if e := gw.Close(); e != nil {
+		log.Fatal(e.Error())
+	}
+
+}