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// Copyright 2015 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package git
import (
"fmt"
"io"
"os"
"strconv"
"strings"
"sync"
)
// ObjectCache provides thread-safe cache opeations.
type ObjectCache struct {
lock sync.RWMutex
cache map[string]interface{}
}
func newObjectCache() *ObjectCache {
return &ObjectCache{
cache: make(map[string]interface{}, 10),
}
}
// Set add obj to cache
func (oc *ObjectCache) Set(id string, obj interface{}) {
oc.lock.Lock()
defer oc.lock.Unlock()
oc.cache[id] = obj
}
// Get get cached obj by id
func (oc *ObjectCache) Get(id string) (interface{}, 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)
}
// RefEndName return the end name of a ref name
func RefEndName(refStr string) string {
if strings.HasPrefix(refStr, BranchPrefix) {
return refStr[len(BranchPrefix):]
}
if strings.HasPrefix(refStr, TagPrefix) {
return refStr[len(TagPrefix):]
}
return refStr
}
// RefURL returns the absolute URL for a ref in a repository
func RefURL(repoURL, ref string) string {
refName := RefEndName(ref)
switch {
case strings.HasPrefix(ref, BranchPrefix):
return repoURL + "/src/branch/" + refName
case strings.HasPrefix(ref, TagPrefix):
return repoURL + "/src/tag/" + refName
default:
return repoURL + "/src/commit/" + refName
}
}
// SplitRefName splits a full refname to reftype and simple refname
func SplitRefName(refStr string) (string, string) {
if strings.HasPrefix(refStr, BranchPrefix) {
return BranchPrefix, refStr[len(BranchPrefix):]
}
if strings.HasPrefix(refStr, TagPrefix) {
return TagPrefix, refStr[len(TagPrefix):]
}
return "", refStr
}
// 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 bool, 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
}
// Close implements io.Closer
func (l *LimitedReaderCloser) Close() error {
return l.C.Close()
}
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