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109 lines
2.6 KiB
109 lines
2.6 KiB
// Copyright 2013 Unknown
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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// Package cae implements PHP-like Compression and Archive Extensions.
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package cae
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import (
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"io"
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"os"
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"strings"
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)
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// A Streamer describes an streamable archive object.
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type Streamer interface {
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StreamFile(string, os.FileInfo, []byte) error
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StreamReader(string, os.FileInfo, io.Reader) error
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Close() error
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}
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// A HookFunc represents a middleware for packing and extracting archive.
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type HookFunc func(string, os.FileInfo) error
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// HasPrefix returns true if name has any string in given slice as prefix.
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func HasPrefix(name string, prefixes []string) bool {
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for _, prefix := range prefixes {
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if strings.HasPrefix(name, prefix) {
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return true
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}
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}
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return false
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}
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// IsEntry returns true if name equals to any string in given slice.
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func IsEntry(name string, entries []string) bool {
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for _, e := range entries {
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if e == name {
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return true
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}
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}
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return false
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}
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// IsFilter returns true if given name matches any of global filter rule.
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func IsFilter(name string) bool {
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if strings.Contains(name, ".DS_Store") {
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return true
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}
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return false
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}
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// IsExist returns true if given path is a file or directory.
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func IsExist(path string) bool {
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_, err := os.Stat(path)
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return err == nil || os.IsExist(err)
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}
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// Copy copies file from source to target path.
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func Copy(dest, src string) error {
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// Gather file information to set back later.
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si, err := os.Lstat(src)
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if err != nil {
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return err
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}
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// Handle symbolic link.
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if si.Mode()&os.ModeSymlink != 0 {
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target, err := os.Readlink(src)
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if err != nil {
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return err
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}
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// NOTE: os.Chmod and os.Chtimes don't recoganize symbolic link,
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// which will lead "no such file or directory" error.
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return os.Symlink(target, dest)
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}
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sr, err := os.Open(src)
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if err != nil {
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return err
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}
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defer sr.Close()
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dw, err := os.Create(dest)
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if err != nil {
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return err
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}
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defer dw.Close()
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if _, err = io.Copy(dw, sr); err != nil {
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return err
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}
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// Set back file information.
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if err = os.Chtimes(dest, si.ModTime(), si.ModTime()); err != nil {
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return err
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}
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return os.Chmod(dest, si.Mode())
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}
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