[I18N] Add Locale merger script

(cherry picked from commit ecc3dae2ac)
(cherry picked from commit c6c3fc6ace)

build/merge-forgejo-locales.go

@@ -0,0 +1,92 @@
+// Copyright 2022 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+//go:build ignore
+
+package main
+
+import (
+	"bufio"
+	"os"
+	"regexp"
+	"strings"
+
+	"gopkg.in/ini.v1"
+)
+
+const (
+	trimPrefix   = "gitea_"
+	sourceFolder = "options/locales/"
+)
+
+// returns list of locales, still containing the file extension!
+func generate_locale_list() []string {
+	localeFiles, _ := os.ReadDir(sourceFolder)
+	locales := []string{}
+	for _, localeFile := range localeFiles {
+		if !localeFile.IsDir() && strings.HasPrefix(localeFile.Name(), trimPrefix) {
+			locales = append(locales, strings.TrimPrefix(localeFile.Name(), trimPrefix))
+		}
+	}
+	return locales
+}
+
+// replace all occurrences of Gitea with Forgejo
+func renameGiteaForgejo(filename string) []byte {
+	file, err := os.Open(filename)
+	if err != nil {
+		panic(err)
+	}
+
+	replacer := strings.NewReplacer(
+		"Gitea", "Forgejo",
+		"https://docs.gitea.io/en-us/install-from-binary/", "https://forgejo.org/download/#installation-from-binary",
+		"https://github.com/go-gitea/gitea/tree/master/docker", "https://forgejo.org/download/#container-image",
+		"https://docs.gitea.io/en-us/install-from-package/", "https://forgejo.org/download",
+		"https://code.gitea.io/gitea", "https://forgejo.org/download",
+		"code.gitea.io/gitea", "Forgejo",
+		`<a href="https://github.com/go-gitea/gitea/issues" target="_blank">GitHub</a>`, `<a href="https://codeberg.org/forgejo/forgejo/issues" target="_blank">Codeberg</a>`,
+		"https://github.com/go-gitea/gitea", "https://codeberg.org/forgejo/forgejo",
+		"https://blog.gitea.io", "https://forgejo.org/news",
+	)
+
+	out := make([]byte, 0, 1024)
+	scanner := bufio.NewScanner(file)
+	scanner.Split(bufio.ScanLines)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
+			out = append(out, []byte("\n"+line+"\n")...)
+		} else if strings.HasPrefix(line, "settings.web_hook_name_gitea") {
+			out = append(out, []byte("\n"+line+"\n")...)
+			out = append(out, []byte("settings.web_hook_name_forgejo = Forgejo\n")...)
+		} else if strings.HasPrefix(line, "migrate.gitea.description") {
+			re := regexp.MustCompile(`(.*Gitea)`)
+			out = append(out, []byte(re.ReplaceAllString(line, "${1}/Forgejo")+"\n")...)
+		} else {
+			out = append(out, []byte(replacer.Replace(line)+"\n")...)
+		}
+	}
+	file.Close()
+	return out
+}
+
+func main() {
+	locales := generate_locale_list()
+	var err error
+	var localeFile *ini.File
+	for _, locale := range locales {
+		giteaLocale := sourceFolder + "gitea_" + locale
+		localeFile, err = ini.LoadSources(ini.LoadOptions{
+			IgnoreInlineComment: true,
+		}, giteaLocale, renameGiteaForgejo(giteaLocale))
+		if err != nil {
+			panic(err)
+		}
+		err = localeFile.SaveTo("options/locale/locale_" + locale)
+		if err != nil {
+			panic(err)
+		}
+	}
+}