// Copyright 2015 The Gogs Authors. All rights reserved.// SPDX-License-Identifier: MIT package git import (	"crypto/sha1"	"encoding/hex"	"fmt"	"os"	"strconv"	"strings"	"sync") // ObjectCache provides thread-safe cache operations.type ObjectCache struct {	lock  sync.RWMutex	cache map[string]any} func newObjectCache() *ObjectCache {	return &ObjectCache{		cache: make(map[string]any, 10),	}} // Set add obj to cachefunc (oc *ObjectCache) Set(id string, obj any) {	oc.lock.Lock()	defer oc.lock.Unlock() 	oc.cache[id] = obj} // Get get cached obj by idfunc (oc *ObjectCache) Get(id string) (any, bool) {	oc.lock.RLock()	defer oc.lock.RUnlock() 	obj, has := oc.cache[id]	return obj, has} // isDir returns true if given path is a directory,// or returns false when it's a file or does not exist.func isDir(dir string) bool {	f, e := os.Stat(dir)	if e != nil {		return false	}	return f.IsDir()} // isFile returns true if given path is a file,// or returns false when it's a directory or does not exist.func isFile(filePath string) bool {	f, e := os.Stat(filePath)	if e != nil {		return false	}	return !f.IsDir()} // isExist checks whether a file or directory exists.// It returns false when the file or directory does not exist.func isExist(path string) bool {	_, err := os.Stat(path)	return err == nil || os.IsExist(err)} // ConcatenateError concatenats an error with stderr stringfunc ConcatenateError(err error, stderr string) error {	if len(stderr) == 0 {		return err	}	return fmt.Errorf("%w - %s", err, stderr)} // ParseBool returns the boolean value represented by the string as per git's git_config_bool// true will be returned for the result if the string is empty, but valid will be false.// "true", "yes", "on" are all true, true// "false", "no", "off" are all false, true// 0 is false, true// Any other integer is true, true// Anything else will return false, falsefunc ParseBool(value string) (result, valid bool) {	// Empty strings are true but invalid	if len(value) == 0 {		return true, false	}	// These are the git expected true and false values	if strings.EqualFold(value, "true") || strings.EqualFold(value, "yes") || strings.EqualFold(value, "on") {		return true, true	}	if strings.EqualFold(value, "false") || strings.EqualFold(value, "no") || strings.EqualFold(value, "off") {		return false, true	}	// Try a number	intValue, err := strconv.ParseInt(value, 10, 32)	if err != nil {		return false, false	}	return intValue != 0, true} func HashFilePathForWebUI(s string) string {	h := sha1.New()	_, _ = h.Write([]byte(s))	return hex.EncodeToString(h.Sum(nil))}