1 files changed, 115 insertions, 0 deletions
diff --git a/build/backport-locales.go b/build/backport-locales.go
new file mode 100644
index 0000000..3df83ea
--- /dev/null
+++ b/build/backport-locales.go
@@ -0,0 +1,115 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build ignore
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"code.gitea.io/gitea/modules/container"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Println("usage: backport-locales <to-ref>")
+		fmt.Println("eg: backport-locales release/v1.19")
+		os.Exit(1)
+	}
+
+	mustNoErr := func(err error) {
+		if err != nil {
+			panic(err)
+		}
+	}
+	collectInis := func(ref string) map[string]setting.ConfigProvider {
+		inis := map[string]setting.ConfigProvider{}
+		err := filepath.WalkDir("options/locale", func(path string, d os.DirEntry, err error) error {
+			if err != nil {
+				return err
+			}
+			if d.IsDir() || !strings.HasSuffix(d.Name(), ".ini") {
+				return nil
+			}
+			cfg, err := setting.NewConfigProviderForLocale(path)
+			mustNoErr(err)
+			inis[path] = cfg
+			fmt.Printf("collecting: %s @ %s\n", path, ref)
+			return nil
+		})
+		mustNoErr(err)
+		return inis
+	}
+
+	// collect new locales from current working directory
+	inisNew := collectInis("HEAD")
+
+	// switch to the target ref, and collect the old locales
+	cmd := exec.Command("git", "checkout", os.Args[1])
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	mustNoErr(cmd.Run())
+	inisOld := collectInis(os.Args[1])
+
+	// use old en-US as the base, and copy the new translations to the old locales
+	enUsOld := inisOld["options/locale/locale_en-US.ini"]
+	brokenWarned := make(container.Set[string])
+	for path, iniOld := range inisOld {
+		if iniOld == enUsOld {
+			continue
+		}
+		iniNew := inisNew[path]
+		if iniNew == nil {
+			continue
+		}
+		for _, secEnUS := range enUsOld.Sections() {
+			secOld := iniOld.Section(secEnUS.Name())
+			secNew := iniNew.Section(secEnUS.Name())
+			for _, keyEnUs := range secEnUS.Keys() {
+				if secNew.HasKey(keyEnUs.Name()) {
+					oldStr := secOld.Key(keyEnUs.Name()).String()
+					newStr := secNew.Key(keyEnUs.Name()).String()
+					broken := oldStr != "" && strings.Count(oldStr, "%") != strings.Count(newStr, "%")
+					broken = broken || strings.Contains(oldStr, "\n") || strings.Contains(oldStr, "\n")
+					if broken {
+						brokenWarned.Add(secOld.Name() + "." + keyEnUs.Name())
+						fmt.Println("----")
+						fmt.Printf("WARNING: skip broken locale: %s , [%s] %s\n", path, secEnUS.Name(), keyEnUs.Name())
+						fmt.Printf("\told: %s\n", strings.ReplaceAll(oldStr, "\n", "\\n"))
+						fmt.Printf("\tnew: %s\n", strings.ReplaceAll(newStr, "\n", "\\n"))
+						continue
+					}
+					secOld.Key(keyEnUs.Name()).SetValue(newStr)
+				}
+			}
+		}
+		mustNoErr(iniOld.SaveTo(path))
+	}
+
+	fmt.Println("========")
+
+	for path, iniNew := range inisNew {
+		for _, sec := range iniNew.Sections() {
+			for _, key := range sec.Keys() {
+				str := sec.Key(key.Name()).String()
+				broken := strings.Contains(str, "\n")
+				broken = broken || strings.HasPrefix(str, "`") != strings.HasSuffix(str, "`")
+				broken = broken || strings.HasPrefix(str, "\"`")
+				broken = broken || strings.HasPrefix(str, "`\"")
+				broken = broken || strings.Count(str, `"`)%2 == 1
+				broken = broken || strings.Count(str, "`")%2 == 1
+				if broken && !brokenWarned.Contains(sec.Name()+"."+key.Name()) {
+					fmt.Printf("WARNING: found broken locale: %s , [%s] %s\n", path, sec.Name(), key.Name())
+					fmt.Printf("\tstr: %s\n", strings.ReplaceAll(str, "\n", "\\n"))
+					fmt.Println("----")
+				}
+			}
+		}
+	}
+}