forked from aptly-dev/aptly
/
deb.go
173 lines (151 loc) · 3.97 KB
/
deb.go
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package deb
import (
"archive/tar"
"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"
)
// GetControlFileFromDeb reads control file from deb package
func GetControlFileFromDeb(packageFile string) (Stanza, error) {
file, err := os.Open(packageFile)
if err != nil {
return nil, err
}
defer file.Close()
library := ar.NewReader(file)
for {
header, err := library.Next()
if err == io.EOF {
return nil, fmt.Errorf("unable to find control.tar.gz part in package %s", packageFile)
}
if err != nil {
return nil, fmt.Errorf("unable to read .deb archive %s: %s", packageFile, err)
}
if header.Name == "control.tar.gz" {
ungzip, err := gzip.NewReader(library)
if err != nil {
return nil, fmt.Errorf("unable to ungzip control file from %s. Error: %s", packageFile, err)
}
defer ungzip.Close()
untar := tar.NewReader(ungzip)
for {
tarHeader, err := untar.Next()
if err == io.EOF {
return nil, fmt.Errorf("unable to find control file in %s", packageFile)
}
if err != nil {
return nil, fmt.Errorf("unable to read .tar archive from %s. Error: %s", packageFile, err)
}
if tarHeader.Name == "./control" || tarHeader.Name == "control" {
reader := NewControlFileReader(untar)
stanza, err := reader.ReadStanza(false)
if err != nil {
return nil, err
}
return stanza, nil
}
}
}
}
}
// GetControlFileFromDsc reads control file from dsc package
func GetControlFileFromDsc(dscFile string, verifier utils.Verifier) (Stanza, error) {
file, err := os.Open(dscFile)
if err != nil {
return nil, err
}
defer file.Close()
isClearSigned, err := verifier.IsClearSigned(file)
file.Seek(0, 0)
if err != nil {
return nil, err
}
var text *os.File
if isClearSigned {
text, err = verifier.ExtractClearsigned(file)
if err != nil {
return nil, err
}
defer text.Close()
} else {
text = file
}
reader := NewControlFileReader(text)
stanza, err := reader.ReadStanza(false)
if err != nil {
return nil, err
}
return stanza, nil
}
// GetContentsFromDeb returns list of files installed by .deb package
func GetContentsFromDeb(packageFile string) ([]string, error) {
file, err := os.Open(packageFile)
if err != nil {
return nil, err
}
defer file.Close()
library := ar.NewReader(file)
for {
header, err := library.Next()
if err == io.EOF {
return nil, fmt.Errorf("unable to find data.tar.* part in %s", packageFile)
}
if err != nil {
return nil, fmt.Errorf("unable to read .deb archive from %s: %s", packageFile, err)
}
if strings.HasPrefix(header.Name, "data.tar") {
var tarInput io.Reader
switch header.Name {
case "data.tar":
tarInput = library
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)
}
defer ungzip.Close()
tarInput = ungzip
case "data.tar.bz2":
tarInput = bzip2.NewReader(library)
case "data.tar.xz":
unxz, err := xz.NewReader(library)
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)
defer unlzma.Close()
tarInput = unlzma
default:
return nil, fmt.Errorf("unsupported tar compression in %s: %s", packageFile, header.Name)
}
untar := tar.NewReader(tarInput)
var results []string
for {
tarHeader, err := untar.Next()
if err == io.EOF {
return results, nil
}
if err != nil {
return nil, fmt.Errorf("unable to read .tar archive from %s: %s", packageFile, err)
}
if tarHeader.Typeflag == tar.TypeDir {
continue
}
if strings.HasPrefix(tarHeader.Name, "./") {
tarHeader.Name = tarHeader.Name[2:]
}
results = append(results, tarHeader.Name)
}
}
}
}