/
command-init-unpack.go
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/
command-init-unpack.go
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// Copyright (c) 2012-2014 José Carlos Nieto, https://menteslibres.net/xiam
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package main
import (
"archive/tar"
"bytes"
"compress/bzip2"
"fmt"
"io"
"os"
)
// Attempts to extract a compressed project into the given destination.
func unpackExampleProject(root string) (err error) {
var stat os.FileInfo
// Validating destination.
if stat, err = os.Stat(root); err != nil {
return err
}
if stat.IsDir() == false {
return fmt.Errorf("Expecting a directory.")
}
// Creating a tarbz2 reader.
tbz := tar.NewReader(bzip2.NewReader(bytes.NewBuffer(compressedProject)))
// Extracting tarred files.
for {
hdr, err := tbz.Next()
if err != nil {
if err == io.EOF {
break
}
panic(err.Error())
}
// See http://en.wikipedia.org/wiki/Tar_(computing)
filePath := root + pathSeparator + hdr.Name
switch hdr.Typeflag {
case '0':
// Normal file
fp, err := os.Create(filePath)
if err != nil {
return err
}
io.Copy(fp, tbz)
err = os.Chmod(filePath, os.FileMode(hdr.Mode))
if err != nil {
return err
}
fp.Close()
case '5':
// Directory
os.MkdirAll(filePath, os.FileMode(hdr.Mode))
default:
// fmt.Printf("--> %s, %d, %c\n", hdr.Name, hdr.Mode, hdr.Typeflag)
panic(fmt.Sprintf("Unhandled tar type: %c in file: %s", hdr.Typeflag, hdr.Name))
}
}
return nil
}