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Add workaround for reading data.tar.gz as data.tar

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It seems that in the wild there are .deb package which have
`data.tar.gz` which is actually `.tar` archive.

Add magic detection based on signature.
This commit is contained in:
Andrey Smirnov
2017-01-24 00:27:43 +03:00
parent c8a1b9a1f0
commit c75d4c749c
2 changed files with 30 additions and 13 deletions
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1
Gomfile
View File

@@ -5,6 +5,7 @@ gom 'github.com/cheggaaa/pb', :commit => '2c1b74620cc58a81ac152ee2d322e28c806d81
gom 'github.com/DisposaBoy/JsonConfigReader', :commit => '33a99fdf1d5ee1f79b5077e9c06f955ad356d5f4'
gom 'github.com/gin-gonic/gin', :commit => 'b1758d3bfa09e61ddbc1c9a627e936eec6a170de'
gom 'github.com/go-ini/ini', :commit => 'afbd495e5aaea13597b5e14fe514ddeaa4d76fc3'
gom 'github.com/h2non/filetype/matchers', :commit => '259d9d2c52bc90dbd7e1999f9da86ee0d104d0ff'
gom 'github.com/jlaffaye/ftp', :commit => 'fec71e62e457557fbe85cefc847a048d57815d76'
gom 'github.com/jmespath/go-jmespath', :commit => '0b12d6b521d83fc7f755e7cfc1b1fbdd35a01a74'
gom 'github.com/julienschmidt/httprouter', :commit => '46807412fe50aaceb73bb57061c2230fd26a1640'

42
deb/deb.go
View File

@@ -2,16 +2,20 @@ package deb
import (
"archive/tar"
"bufio"
"compress/bzip2"
"compress/gzip"
"fmt"
"github.com/mkrautz/goar"
"github.com/smira/aptly/utils"
"github.com/smira/go-xz"
"github.com/smira/lzma"
"io"
"os"
"strings"
"github.com/h2non/filetype/matchers"
"github.com/mkrautz/goar"
"github.com/smira/aptly/utils"
"github.com/smira/go-xz"
"github.com/smira/lzma"
)
// GetControlFileFromDeb reads control file from deb package
@@ -119,29 +123,41 @@ func GetContentsFromDeb(packageFile string) ([]string, error) {
}
if strings.HasPrefix(header.Name, "data.tar") {
bufReader := bufio.NewReader(library)
signature, err := bufReader.Peek(270)
var isTar bool
if err == nil {
isTar = matchers.Tar(signature)
}
var tarInput io.Reader
switch header.Name {
case "data.tar":
tarInput = library
tarInput = bufReader
case "data.tar.gz":
ungzip, err := gzip.NewReader(library)
if err != nil {
return nil, fmt.Errorf("unable to ungzip data.tar.gz from %s: %s", packageFile, err)
if isTar {
tarInput = bufReader
} else {
ungzip, err := gzip.NewReader(bufReader)
if err != nil {
return nil, fmt.Errorf("unable to ungzip data.tar.gz from %s: %s", packageFile, err)
}
defer ungzip.Close()
tarInput = ungzip
}
defer ungzip.Close()
tarInput = ungzip
case "data.tar.bz2":
tarInput = bzip2.NewReader(library)
tarInput = bzip2.NewReader(bufReader)
case "data.tar.xz":
unxz, err := xz.NewReader(library)
unxz, err := xz.NewReader(bufReader)
if err != nil {
return nil, fmt.Errorf("unable to unxz data.tar.xz from %s: %s", packageFile, err)
}
defer unxz.Close()
tarInput = unxz
case "data.tar.lzma":
unlzma := lzma.NewReader(library)
unlzma := lzma.NewReader(bufReader)
defer unlzma.Close()
tarInput = unlzma
default: