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143 lines
3.5 KiB
143 lines
3.5 KiB
package rice
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import (
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"archive/zip"
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"log"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/daaku/go.zipexe"
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)
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// appendedBox defines an appended box
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type appendedBox struct {
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Name string // box name
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Files map[string]*appendedFile // appended files (*zip.File) by full path
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Time time.Time
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}
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type appendedFile struct {
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zipFile *zip.File
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dir bool
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dirInfo *appendedDirInfo
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children []*appendedFile
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content []byte
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}
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// appendedBoxes is a public register of appendes boxes
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var appendedBoxes = make(map[string]*appendedBox)
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func init() {
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// find if exec is appended
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thisFile, err := os.Executable()
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if err != nil {
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return // not appended or cant find self executable
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}
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thisFile, err = filepath.EvalSymlinks(thisFile)
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if err != nil {
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return
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}
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closer, rd, err := zipexe.OpenCloser(thisFile)
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if err != nil {
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return // not appended
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}
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defer closer.Close()
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for _, f := range rd.File {
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// get box and file name from f.Name
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fileParts := strings.SplitN(strings.TrimLeft(filepath.ToSlash(f.Name), "/"), "/", 2)
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boxName := fileParts[0]
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var fileName string
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if len(fileParts) > 1 {
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fileName = fileParts[1]
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}
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// find box or create new one if doesn't exist
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box := appendedBoxes[boxName]
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if box == nil {
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box = &appendedBox{
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Name: boxName,
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Files: make(map[string]*appendedFile),
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Time: f.ModTime(),
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}
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appendedBoxes[boxName] = box
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}
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// create and add file to box
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af := &appendedFile{
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zipFile: f,
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}
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if f.Comment == "dir" {
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af.dir = true
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af.dirInfo = &appendedDirInfo{
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name: filepath.Base(af.zipFile.Name),
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time: af.zipFile.ModTime(),
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}
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} else {
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// this is a file, we need it's contents so we can create a bytes.Reader when the file is opened
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// make a new byteslice
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af.content = make([]byte, af.zipFile.FileInfo().Size())
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// ignore reading empty files from zip (empty file still is a valid file to be read though!)
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if len(af.content) > 0 {
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// open io.ReadCloser
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rc, err := af.zipFile.Open()
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if err != nil {
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af.content = nil // this will cause an error when the file is being opened or seeked (which is good)
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// TODO: it's quite blunt to just log this stuff. but this is in init, so rice.Debug can't be changed yet..
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log.Printf("error opening appended file %s: %v", af.zipFile.Name, err)
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} else {
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_, err = rc.Read(af.content)
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rc.Close()
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if err != nil {
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af.content = nil // this will cause an error when the file is being opened or seeked (which is good)
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// TODO: it's quite blunt to just log this stuff. but this is in init, so rice.Debug can't be changed yet..
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log.Printf("error reading data for appended file %s: %v", af.zipFile.Name, err)
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}
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}
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}
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}
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// add appendedFile to box file list
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box.Files[fileName] = af
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// add to parent dir (if any)
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dirName := filepath.Dir(fileName)
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if dirName == "." {
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dirName = ""
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}
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if fileName != "" { // don't make box root dir a child of itself
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if dir := box.Files[dirName]; dir != nil {
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dir.children = append(dir.children, af)
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}
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}
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}
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}
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// implements os.FileInfo.
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// used for Readdir()
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type appendedDirInfo struct {
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name string
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time time.Time
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}
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func (adi *appendedDirInfo) Name() string {
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return adi.name
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}
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func (adi *appendedDirInfo) Size() int64 {
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return 0
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}
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func (adi *appendedDirInfo) Mode() os.FileMode {
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return os.ModeDir
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}
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func (adi *appendedDirInfo) ModTime() time.Time {
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return adi.time
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}
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func (adi *appendedDirInfo) IsDir() bool {
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return true
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}
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func (adi *appendedDirInfo) Sys() interface{} {
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return nil
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}
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