1 files changed, 138 insertions, 0 deletions
diff --git a/modules/git/utils.go b/modules/git/utils.go
new file mode 100644
index 00000000..53211c64
--- /dev/null
+++ b/modules/git/utils.go
@@ -0,0 +1,138 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"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 cache
+func (oc *ObjectCache) Set(id string, obj any) {
+	oc.lock.Lock()
+	defer oc.lock.Unlock()
+
+	oc.cache[id] = obj
+}
+
+// Get get cached obj by id
+func (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 string
+func 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, false
+func 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
+}
+
+// LimitedReaderCloser is a limited reader closer
+type LimitedReaderCloser struct {
+	R io.Reader
+	C io.Closer
+	N int64
+}
+
+// Read implements io.Reader
+func (l *LimitedReaderCloser) Read(p []byte) (n int, err error) {
+	if l.N <= 0 {
+		_ = l.C.Close()
+		return 0, io.EOF
+	}
+	if int64(len(p)) > l.N {
+		p = p[0:l.N]
+	}
+	n, err = l.R.Read(p)
+	l.N -= int64(n)
+	return n, err
+}
+
+// Close implements io.Closer
+func (l *LimitedReaderCloser) Close() error {
+	return l.C.Close()
+}
+
+func HashFilePathForWebUI(s string) string {
+	h := sha1.New()
+	_, _ = h.Write([]byte(s))
+	return hex.EncodeToString(h.Sum(nil))
+}