forked from mirror/pkger
77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package pkger
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import (
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"bytes"
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"compress/gzip"
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io"
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"log"
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)
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// Open opens the named file for reading.
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func Open(p string) (*File, error) {
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pt, err := Parse(p)
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if err != nil {
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return nil, err
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}
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return rootIndex.Open(pt)
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}
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// Create creates the named file with mode 0666 (before umask), truncating it if it already exists. If successful, methods on the returned File can be used for I/O; the associated file descriptor has mode O_RDWR. If there is an error, it will be of type *PathError.
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func Create(p string) (*File, error) {
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pt, err := Parse(p)
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if err != nil {
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return nil, err
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}
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return rootIndex.Create(pt)
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}
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func Unpack(ind string) error {
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b, err := hex.DecodeString(ind)
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if err != nil {
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log.Fatal("hex.DecodeString", err)
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return err
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}
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gz, err := gzip.NewReader(bytes.NewReader(b))
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if err != nil {
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log.Fatal("gzip.NewReader", err)
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return err
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}
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defer gz.Close()
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if err := json.NewDecoder(gz).Decode(rootIndex); err != nil {
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log.Fatal("json.NewDecoder", err)
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return err
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}
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return nil
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}
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func Pack(out io.Writer, paths []Path) error {
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bb := &bytes.Buffer{}
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gz := gzip.NewWriter(bb)
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defer gz.Close()
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for _, p := range paths {
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f, err := Open(p.String())
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if err != nil {
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return err
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}
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rootIndex.Files.Store(p, f)
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f.Close()
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}
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if err := json.NewEncoder(gz).Encode(rootIndex); err != nil {
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return err
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}
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if err := gz.Close(); err != nil {
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return err
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}
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s := hex.EncodeToString(bb.Bytes())
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fmt.Fprint(out, s)
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return nil
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}
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