172 lines
3.5 KiB
Go
172 lines
3.5 KiB
Go
/*
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* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package goldsmith
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import (
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"bytes"
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"io"
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"time"
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)
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type file struct {
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path string
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Meta map[string]interface{}
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reader *bytes.Reader
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size int64
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modTime time.Time
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asset string
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}
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func (f *file) export(dstDir string) error {
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dstPath := filepath.Join(dstDir, f.path)
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if len(f.asset) > 0 {
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dstInfo, err := os.Stat(dstPath)
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if err == nil && dstInfo.ModTime().Unix() >= f.ModTime().Unix() {
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return nil
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}
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}
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if err := os.MkdirAll(path.Dir(dstPath), 0755); err != nil {
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return err
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}
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fw, err := os.Create(dstPath)
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if err != nil {
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return err
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}
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defer fw.Close()
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if f.reader == nil {
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fr, err := os.Open(f.asset)
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if err != nil {
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return err
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}
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defer fr.Close()
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if _, err := io.Copy(fw, fr); err != nil {
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return err
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}
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} else {
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if _, err := f.Seek(0, os.SEEK_SET); err != nil {
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return err
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}
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if _, err := f.WriteTo(fw); err != nil {
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return err
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}
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}
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return nil
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}
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func (f *file) cache() error {
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if f.reader != nil {
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return nil
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}
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data, err := ioutil.ReadFile(f.asset)
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if err != nil {
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return err
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}
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f.reader = bytes.NewReader(data)
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return nil
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}
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//
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// File Implementation
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//
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func (f *file) Path() string {
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return f.path
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}
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func (f *file) Name() string {
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return path.Base(f.path)
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}
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func (f *file) Dir() string {
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return path.Dir(f.path)
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}
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func (f *file) Ext() string {
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return path.Ext(f.path)
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}
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func (f *file) Size() int64 {
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return f.size
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}
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func (f *file) ModTime() time.Time {
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return f.modTime
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}
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func (f *file) Value(key string) (interface{}, bool) {
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value, ok := f.Meta[key]
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return value, ok
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}
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func (f *file) SetValue(key string, value interface{}) {
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f.Meta[key] = value
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}
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func (f *file) CopyValues(src File) {
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rf := src.(*file)
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for name, value := range rf.Meta {
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f.SetValue(name, value)
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}
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}
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func (f *file) Read(p []byte) (int, error) {
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if err := f.cache(); err != nil {
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return 0, err
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}
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return f.reader.Read(p)
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}
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func (f *file) WriteTo(w io.Writer) (int64, error) {
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if err := f.cache(); err != nil {
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return 0, err
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}
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return f.reader.WriteTo(w)
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}
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func (f *file) Seek(offset int64, whence int) (int64, error) {
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if f.reader == nil && offset == 0 && (whence == os.SEEK_SET || whence == os.SEEK_CUR) {
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return 0, nil
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}
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if err := f.cache(); err != nil {
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return 0, err
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}
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return f.reader.Seek(offset, whence)
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}
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